Add Package Registry (#16510)

* Added package store settings.

* Added models.

* Added generic package registry.

* Added tests.

* Added NuGet package registry.

* Moved service index to api file.

* Added NPM package registry.

* Added Maven package registry.

* Added PyPI package registry.

* Summary is deprecated.

* Changed npm name.

* Sanitize project url.

* Allow only scoped packages.

* Added user interface.

* Changed method name.

* Added missing migration file.

* Set page info.

* Added documentation.

* Added documentation links.

* Fixed wrong error message.

* Lint template files.

* Fixed merge errors.

* Fixed unit test storage path.

* Switch to json module.

* Added suggestions.

* Added package webhook.

* Add package api.

* Fixed swagger file.

* Fixed enum and comments.

* Fixed NuGet pagination.

* Print test names.

* Added api tests.

* Fixed access level.

* Fix User unmarshal.

* Added RubyGems package registry.

* Fix lint.

* Implemented io.Writer.

* Added support for sha256/sha512 checksum files.

* Improved maven-metadata.xml support.

* Added support for symbol package uploads.

* Added tests.

* Added overview docs.

* Added npm dependencies and keywords.

* Added no-packages information.

* Display file size.

* Display asset count.

* Fixed filter alignment.

* Added package icons.

* Formatted instructions.

* Allow anonymous package downloads.

* Fixed comments.

* Fixed postgres test.

* Moved file.

* Moved models to models/packages.

* Use correct error response format per client.

* Use simpler search form.

* Fixed IsProd.

* Restructured data model.

* Prevent empty filename.

* Fix swagger.

* Implemented user/org registry.

* Implemented UI.

* Use GetUserByIDCtx.

* Use table for dependencies.

* make svg

* Added support for unscoped npm packages.

* Add support for npm dist tags.

* Added tests for npm tags.

* Unlink packages if repository gets deleted.

* Prevent user/org delete if a packages exist.

* Use package unlink in repository service.

* Added support for composer packages.

* Restructured package docs.

* Added missing tests.

* Fixed generic content page.

* Fixed docs.

* Fixed swagger.

* Added missing type.

* Fixed ambiguous column.

* Organize content store by sha256 hash.

* Added admin package management.

* Added support for sorting.

* Add support for multiple identical versions/files.

* Added missing repository unlink.

* Added file properties.

* make fmt

* lint

* Added Conan package registry.

* Updated docs.

* Unify package names.

* Added swagger enum.

* Use longer TEXT column type.

* Removed version composite key.

* Merged package and container registry.

* Removed index.

* Use dedicated package router.

* Moved files to new location.

* Updated docs.

* Fixed JOIN order.

* Fixed GROUP BY statement.

* Fixed GROUP BY #2.

* Added symbol server support.

* Added more tests.

* Set NOT NULL.

* Added setting to disable package registries.

* Moved auth into service.

* refactor

* Use ctx everywhere.

* Added package cleanup task.

* Changed packages path.

* Added container registry.

* Refactoring

* Updated comparison.

* Fix swagger.

* Fixed table order.

* Use token auth for npm routes.

* Enabled ReverseProxy auth.

* Added packages link for orgs.

* Fixed anonymous org access.

* Enable copy button for setup instructions.

* Merge error

* Added suggestions.

* Fixed merge.

* Handle "generic".

* Added link for TODO.

* Added suggestions.

* Changed temporary buffer filename.

* Added suggestions.

* Apply suggestions from code review

Co-authored-by: Thomas Boerger <thomas@webhippie.de>

* Update docs/content/doc/packages/nuget.en-us.md

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: Thomas Boerger <thomas@webhippie.de>

routers/api/packages/api.go

@@ -0,0 +1,397 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package packages
+
+import (
+	"net/http"
+	"regexp"
+	"strings"
+
+	"code.gitea.io/gitea/models/perm"
+	"code.gitea.io/gitea/modules/context"
+	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/modules/web"
+	"code.gitea.io/gitea/routers/api/packages/composer"
+	"code.gitea.io/gitea/routers/api/packages/conan"
+	"code.gitea.io/gitea/routers/api/packages/container"
+	"code.gitea.io/gitea/routers/api/packages/generic"
+	"code.gitea.io/gitea/routers/api/packages/maven"
+	"code.gitea.io/gitea/routers/api/packages/npm"
+	"code.gitea.io/gitea/routers/api/packages/nuget"
+	"code.gitea.io/gitea/routers/api/packages/pypi"
+	"code.gitea.io/gitea/routers/api/packages/rubygems"
+	"code.gitea.io/gitea/services/auth"
+	context_service "code.gitea.io/gitea/services/context"
+)
+
+func reqPackageAccess(accessMode perm.AccessMode) func(ctx *context.Context) {
+	return func(ctx *context.Context) {
+		if ctx.Package.AccessMode < accessMode && !ctx.IsUserSiteAdmin() {
+			ctx.Resp.Header().Set("WWW-Authenticate", `Basic realm="Gitea Package API"`)
+			ctx.Error(http.StatusUnauthorized, "reqPackageAccess", "user should have specific permission or be a site admin")
+			return
+		}
+	}
+}
+
+func Routes() *web.Route {
+	r := web.NewRoute()
+
+	r.Use(context.PackageContexter())
+
+	authMethods := []auth.Method{
+		&auth.OAuth2{},
+		&auth.Basic{},
+		&conan.Auth{},
+	}
+	if setting.Service.EnableReverseProxyAuth {
+		authMethods = append(authMethods, &auth.ReverseProxy{})
+	}
+
+	authGroup := auth.NewGroup(authMethods...)
+	r.Use(func(ctx *context.Context) {
+		ctx.Doer = authGroup.Verify(ctx.Req, ctx.Resp, ctx, ctx.Session)
+	})
+
+	r.Group("/{username}", func() {
+		r.Group("/composer", func() {
+			r.Get("/packages.json", composer.ServiceIndex)
+			r.Get("/search.json", composer.SearchPackages)
+			r.Get("/list.json", composer.EnumeratePackages)
+			r.Get("/p2/{vendorname}/{projectname}~dev.json", composer.PackageMetadata)
+			r.Get("/p2/{vendorname}/{projectname}.json", composer.PackageMetadata)
+			r.Get("/files/{package}/{version}/{filename}", composer.DownloadPackageFile)
+			r.Put("", reqPackageAccess(perm.AccessModeWrite), composer.UploadPackage)
+		})
+		r.Group("/conan", func() {
+			r.Group("/v1", func() {
+				r.Get("/ping", conan.Ping)
+				r.Group("/users", func() {
+					r.Get("/authenticate", conan.Authenticate)
+					r.Get("/check_credentials", conan.CheckCredentials)
+				})
+				r.Group("/conans", func() {
+					r.Get("/search", conan.SearchRecipes)
+					r.Group("/{name}/{version}/{user}/{channel}", func() {
+						r.Get("", conan.RecipeSnapshot)
+						r.Delete("", reqPackageAccess(perm.AccessModeWrite), conan.DeleteRecipeV1)
+						r.Get("/search", conan.SearchPackagesV1)
+						r.Get("/digest", conan.RecipeDownloadURLs)
+						r.Post("/upload_urls", reqPackageAccess(perm.AccessModeWrite), conan.RecipeUploadURLs)
+						r.Get("/download_urls", conan.RecipeDownloadURLs)
+						r.Group("/packages", func() {
+							r.Post("/delete", reqPackageAccess(perm.AccessModeWrite), conan.DeletePackageV1)
+							r.Group("/{package_reference}", func() {
+								r.Get("", conan.PackageSnapshot)
+								r.Get("/digest", conan.PackageDownloadURLs)
+								r.Post("/upload_urls", reqPackageAccess(perm.AccessModeWrite), conan.PackageUploadURLs)
+								r.Get("/download_urls", conan.PackageDownloadURLs)
+							})
+						})
+					}, conan.ExtractPathParameters)
+				})
+				r.Group("/files/{name}/{version}/{user}/{channel}/{recipe_revision}", func() {
+					r.Group("/recipe/{filename}", func() {
+						r.Get("", conan.DownloadRecipeFile)
+						r.Put("", reqPackageAccess(perm.AccessModeWrite), conan.UploadRecipeFile)
+					})
+					r.Group("/package/{package_reference}/{package_revision}/{filename}", func() {
+						r.Get("", conan.DownloadPackageFile)
+						r.Put("", reqPackageAccess(perm.AccessModeWrite), conan.UploadPackageFile)
+					})
+				}, conan.ExtractPathParameters)
+			})
+			r.Group("/v2", func() {
+				r.Get("/ping", conan.Ping)
+				r.Group("/users", func() {
+					r.Get("/authenticate", conan.Authenticate)
+					r.Get("/check_credentials", conan.CheckCredentials)
+				})
+				r.Group("/conans", func() {
+					r.Get("/search", conan.SearchRecipes)
+					r.Group("/{name}/{version}/{user}/{channel}", func() {
+						r.Delete("", reqPackageAccess(perm.AccessModeWrite), conan.DeleteRecipeV2)
+						r.Get("/search", conan.SearchPackagesV2)
+						r.Get("/latest", conan.LatestRecipeRevision)
+						r.Group("/revisions", func() {
+							r.Get("", conan.ListRecipeRevisions)
+							r.Group("/{recipe_revision}", func() {
+								r.Delete("", reqPackageAccess(perm.AccessModeWrite), conan.DeleteRecipeV2)
+								r.Get("/search", conan.SearchPackagesV2)
+								r.Group("/files", func() {
+									r.Get("", conan.ListRecipeRevisionFiles)
+									r.Group("/{filename}", func() {
+										r.Get("", conan.DownloadRecipeFile)
+										r.Put("", reqPackageAccess(perm.AccessModeWrite), conan.UploadRecipeFile)
+									})
+								})
+								r.Group("/packages", func() {
+									r.Delete("", reqPackageAccess(perm.AccessModeWrite), conan.DeletePackageV2)
+									r.Group("/{package_reference}", func() {
+										r.Delete("", reqPackageAccess(perm.AccessModeWrite), conan.DeletePackageV2)
+										r.Get("/latest", conan.LatestPackageRevision)
+										r.Group("/revisions", func() {
+											r.Get("", conan.ListPackageRevisions)
+											r.Group("/{package_revision}", func() {
+												r.Delete("", reqPackageAccess(perm.AccessModeWrite), conan.DeletePackageV2)
+												r.Group("/files", func() {
+													r.Get("", conan.ListPackageRevisionFiles)
+													r.Group("/{filename}", func() {
+														r.Get("", conan.DownloadPackageFile)
+														r.Put("", reqPackageAccess(perm.AccessModeWrite), conan.UploadPackageFile)
+													})
+												})
+											})
+										})
+									})
+								})
+							})
+						})
+					}, conan.ExtractPathParameters)
+				})
+			})
+		})
+		r.Group("/generic", func() {
+			r.Group("/{packagename}/{packageversion}/{filename}", func() {
+				r.Get("", generic.DownloadPackageFile)
+				r.Group("", func() {
+					r.Put("", generic.UploadPackage)
+					r.Delete("", generic.DeletePackage)
+				}, reqPackageAccess(perm.AccessModeWrite))
+			})
+		})
+		r.Group("/maven", func() {
+			r.Put("/*", reqPackageAccess(perm.AccessModeWrite), maven.UploadPackageFile)
+			r.Get("/*", maven.DownloadPackageFile)
+		})
+		r.Group("/nuget", func() {
+			r.Get("/index.json", nuget.ServiceIndex)
+			r.Get("/query", nuget.SearchService)
+			r.Group("/registration/{id}", func() {
+				r.Get("/index.json", nuget.RegistrationIndex)
+				r.Get("/{version}", nuget.RegistrationLeaf)
+			})
+			r.Group("/package/{id}", func() {
+				r.Get("/index.json", nuget.EnumeratePackageVersions)
+				r.Get("/{version}/{filename}", nuget.DownloadPackageFile)
+			})
+			r.Group("", func() {
+				r.Put("/", nuget.UploadPackage)
+				r.Put("/symbolpackage", nuget.UploadSymbolPackage)
+				r.Delete("/{id}/{version}", nuget.DeletePackage)
+			}, reqPackageAccess(perm.AccessModeWrite))
+			r.Get("/symbols/{filename}/{guid:[0-9a-f]{32}}FFFFFFFF/{filename2}", nuget.DownloadSymbolFile)
+		})
+		r.Group("/npm", func() {
+			r.Group("/@{scope}/{id}", func() {
+				r.Get("", npm.PackageMetadata)
+				r.Put("", reqPackageAccess(perm.AccessModeWrite), npm.UploadPackage)
+				r.Get("/-/{version}/{filename}", npm.DownloadPackageFile)
+			})
+			r.Group("/{id}", func() {
+				r.Get("", npm.PackageMetadata)
+				r.Put("", reqPackageAccess(perm.AccessModeWrite), npm.UploadPackage)
+				r.Get("/-/{version}/{filename}", npm.DownloadPackageFile)
+			})
+			r.Group("/-/package/@{scope}/{id}/dist-tags", func() {
+				r.Get("", npm.ListPackageTags)
+				r.Group("/{tag}", func() {
+					r.Put("", npm.AddPackageTag)
+					r.Delete("", npm.DeletePackageTag)
+				}, reqPackageAccess(perm.AccessModeWrite))
+			})
+			r.Group("/-/package/{id}/dist-tags", func() {
+				r.Get("", npm.ListPackageTags)
+				r.Group("/{tag}", func() {
+					r.Put("", npm.AddPackageTag)
+					r.Delete("", npm.DeletePackageTag)
+				}, reqPackageAccess(perm.AccessModeWrite))
+			})
+		})
+		r.Group("/pypi", func() {
+			r.Post("/", reqPackageAccess(perm.AccessModeWrite), pypi.UploadPackageFile)
+			r.Get("/files/{id}/{version}/{filename}", pypi.DownloadPackageFile)
+			r.Get("/simple/{id}", pypi.PackageMetadata)
+		})
+		r.Group("/rubygems", func() {
+			r.Get("/specs.4.8.gz", rubygems.EnumeratePackages)
+			r.Get("/latest_specs.4.8.gz", rubygems.EnumeratePackagesLatest)
+			r.Get("/prerelease_specs.4.8.gz", rubygems.EnumeratePackagesPreRelease)
+			r.Get("/quick/Marshal.4.8/{filename}", rubygems.ServePackageSpecification)
+			r.Get("/gems/{filename}", rubygems.DownloadPackageFile)
+			r.Group("/api/v1/gems", func() {
+				r.Post("/", rubygems.UploadPackageFile)
+				r.Delete("/yank", rubygems.DeletePackage)
+			}, reqPackageAccess(perm.AccessModeWrite))
+		})
+	}, context_service.UserAssignmentWeb(), context.PackageAssignment(), reqPackageAccess(perm.AccessModeRead))
+
+	return r
+}
+
+func ContainerRoutes() *web.Route {
+	r := web.NewRoute()
+
+	r.Use(context.PackageContexter())
+
+	authMethods := []auth.Method{
+		&auth.Basic{},
+		&container.Auth{},
+	}
+	if setting.Service.EnableReverseProxyAuth {
+		authMethods = append(authMethods, &auth.ReverseProxy{})
+	}
+
+	authGroup := auth.NewGroup(authMethods...)
+	r.Use(func(ctx *context.Context) {
+		ctx.Doer = authGroup.Verify(ctx.Req, ctx.Resp, ctx, ctx.Session)
+	})
+
+	r.Get("", container.ReqContainerAccess, container.DetermineSupport)
+	r.Get("/token", container.Authenticate)
+	r.Group("/{username}", func() {
+		r.Group("/{image}", func() {
+			r.Group("/blobs/uploads", func() {
+				r.Post("", container.InitiateUploadBlob)
+				r.Group("/{uuid}", func() {
+					r.Patch("", container.UploadBlob)
+					r.Put("", container.EndUploadBlob)
+				})
+			}, reqPackageAccess(perm.AccessModeWrite))
+			r.Group("/blobs/{digest}", func() {
+				r.Head("", container.HeadBlob)
+				r.Get("", container.GetBlob)
+				r.Delete("", reqPackageAccess(perm.AccessModeWrite), container.DeleteBlob)
+			})
+			r.Group("/manifests/{reference}", func() {
+				r.Put("", reqPackageAccess(perm.AccessModeWrite), container.UploadManifest)
+				r.Head("", container.HeadManifest)
+				r.Get("", container.GetManifest)
+				r.Delete("", reqPackageAccess(perm.AccessModeWrite), container.DeleteManifest)
+			})
+			r.Get("/tags/list", container.GetTagList)
+		}, container.VerifyImageName)
+
+		var (
+			blobsUploadsPattern = regexp.MustCompile(`\A(.+)/blobs/uploads/([a-zA-Z0-9-_.=]+)\z`)
+			blobsPattern        = regexp.MustCompile(`\A(.+)/blobs/([^/]+)\z`)
+			manifestsPattern    = regexp.MustCompile(`\A(.+)/manifests/([^/]+)\z`)
+		)
+
+		// Manual mapping of routes because {image} can contain slashes which chi does not support
+		r.Route("/*", "HEAD,GET,POST,PUT,PATCH,DELETE", func(ctx *context.Context) {
+			path := ctx.Params("*")
+			isHead := ctx.Req.Method == "HEAD"
+			isGet := ctx.Req.Method == "GET"
+			isPost := ctx.Req.Method == "POST"
+			isPut := ctx.Req.Method == "PUT"
+			isPatch := ctx.Req.Method == "PATCH"
+			isDelete := ctx.Req.Method == "DELETE"
+
+			if isPost && strings.HasSuffix(path, "/blobs/uploads") {
+				reqPackageAccess(perm.AccessModeWrite)(ctx)
+				if ctx.Written() {
+					return
+				}
+
+				ctx.SetParams("image", path[:len(path)-14])
+				container.VerifyImageName(ctx)
+				if ctx.Written() {
+					return
+				}
+
+				container.InitiateUploadBlob(ctx)
+				return
+			}
+			if isGet && strings.HasSuffix(path, "/tags/list") {
+				ctx.SetParams("image", path[:len(path)-10])
+				container.VerifyImageName(ctx)
+				if ctx.Written() {
+					return
+				}
+
+				container.GetTagList(ctx)
+				return
+			}
+
+			m := blobsUploadsPattern.FindStringSubmatch(path)
+			if len(m) == 3 && (isPut || isPatch) {
+				reqPackageAccess(perm.AccessModeWrite)(ctx)
+				if ctx.Written() {
+					return
+				}
+
+				ctx.SetParams("image", m[1])
+				container.VerifyImageName(ctx)
+				if ctx.Written() {
+					return
+				}
+
+				ctx.SetParams("uuid", m[2])
+
+				if isPatch {
+					container.UploadBlob(ctx)
+				} else {
+					container.EndUploadBlob(ctx)
+				}
+				return
+			}
+			m = blobsPattern.FindStringSubmatch(path)
+			if len(m) == 3 && (isHead || isGet || isDelete) {
+				ctx.SetParams("image", m[1])
+				container.VerifyImageName(ctx)
+				if ctx.Written() {
+					return
+				}
+
+				ctx.SetParams("digest", m[2])
+
+				if isHead {
+					container.HeadBlob(ctx)
+				} else if isGet {
+					container.GetBlob(ctx)
+				} else {
+					reqPackageAccess(perm.AccessModeWrite)(ctx)
+					if ctx.Written() {
+						return
+					}
+					container.DeleteBlob(ctx)
+				}
+				return
+			}
+			m = manifestsPattern.FindStringSubmatch(path)
+			if len(m) == 3 && (isHead || isGet || isPut || isDelete) {
+				ctx.SetParams("image", m[1])
+				container.VerifyImageName(ctx)
+				if ctx.Written() {
+					return
+				}
+
+				ctx.SetParams("reference", m[2])
+
+				if isHead {
+					container.HeadManifest(ctx)
+				} else if isGet {
+					container.GetManifest(ctx)
+				} else {
+					reqPackageAccess(perm.AccessModeWrite)(ctx)
+					if ctx.Written() {
+						return
+					}
+					if isPut {
+						container.UploadManifest(ctx)
+					} else {
+						container.DeleteManifest(ctx)
+					}
+				}
+				return
+			}
+
+			ctx.Status(http.StatusNotFound)
+		})
+	}, container.ReqContainerAccess, context_service.UserAssignmentWeb(), context.PackageAssignment(), reqPackageAccess(perm.AccessModeRead))
+
+	return r
+}

routers/api/packages/composer/api.go

@@ -0,0 +1,118 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package composer
+
+import (
+	"fmt"
+	"net/url"
+	"time"
+
+	packages_model "code.gitea.io/gitea/models/packages"
+	composer_module "code.gitea.io/gitea/modules/packages/composer"
+)
+
+// ServiceIndexResponse contains registry endpoints
+type ServiceIndexResponse struct {
+	SearchTemplate   string `json:"search"`
+	MetadataTemplate string `json:"metadata-url"`
+	PackageList      string `json:"list"`
+}
+
+func createServiceIndexResponse(registryURL string) *ServiceIndexResponse {
+	return &ServiceIndexResponse{
+		SearchTemplate:   registryURL + "/search.json?q=%query%&type=%type%",
+		MetadataTemplate: registryURL + "/p2/%package%.json",
+		PackageList:      registryURL + "/list.json",
+	}
+}
+
+// SearchResultResponse contains search results
+type SearchResultResponse struct {
+	Total    int64           `json:"total"`
+	Results  []*SearchResult `json:"results"`
+	NextLink string          `json:"next,omitempty"`
+}
+
+// SearchResult contains a search result
+type SearchResult struct {
+	Name        string `json:"name"`
+	Description string `json:"description"`
+	Downloads   int64  `json:"downloads"`
+}
+
+func createSearchResultResponse(total int64, pds []*packages_model.PackageDescriptor, nextLink string) *SearchResultResponse {
+	results := make([]*SearchResult, 0, len(pds))
+
+	for _, pd := range pds {
+		results = append(results, &SearchResult{
+			Name:        pd.Package.Name,
+			Description: pd.Metadata.(*composer_module.Metadata).Description,
+			Downloads:   pd.Version.DownloadCount,
+		})
+	}
+
+	return &SearchResultResponse{
+		Total:    total,
+		Results:  results,
+		NextLink: nextLink,
+	}
+}
+
+// PackageMetadataResponse contains packages metadata
+type PackageMetadataResponse struct {
+	Minified string                               `json:"minified"`
+	Packages map[string][]*PackageVersionMetadata `json:"packages"`
+}
+
+// PackageVersionMetadata contains package metadata
+type PackageVersionMetadata struct {
+	*composer_module.Metadata
+	Name    string    `json:"name"`
+	Version string    `json:"version"`
+	Type    string    `json:"type"`
+	Created time.Time `json:"time"`
+	Dist    Dist      `json:"dist"`
+}
+
+// Dist contains package download informations
+type Dist struct {
+	Type     string `json:"type"`
+	URL      string `json:"url"`
+	Checksum string `json:"shasum"`
+}
+
+func createPackageMetadataResponse(registryURL string, pds []*packages_model.PackageDescriptor) *PackageMetadataResponse {
+	versions := make([]*PackageVersionMetadata, 0, len(pds))
+
+	for _, pd := range pds {
+		packageType := ""
+		for _, pvp := range pd.Properties {
+			if pvp.Name == composer_module.TypeProperty {
+				packageType = pvp.Value
+				break
+			}
+		}
+
+		versions = append(versions, &PackageVersionMetadata{
+			Name:     pd.Package.Name,
+			Version:  pd.Version.Version,
+			Type:     packageType,
+			Created:  time.Unix(int64(pd.Version.CreatedUnix), 0),
+			Metadata: pd.Metadata.(*composer_module.Metadata),
+			Dist: Dist{
+				Type:     "zip",
+				URL:      fmt.Sprintf("%s/files/%s/%s/%s", registryURL, url.PathEscape(pd.Package.LowerName), url.PathEscape(pd.Version.LowerVersion), url.PathEscape(pd.Files[0].File.LowerName)),
+				Checksum: pd.Files[0].Blob.HashSHA1,
+			},
+		})
+	}
+
+	return &PackageMetadataResponse{
+		Minified: "composer/2.0",
+		Packages: map[string][]*PackageVersionMetadata{
+			pds[0].Package.Name: versions,
+		},
+	}
+}

routers/api/packages/composer/composer.go

@@ -0,0 +1,250 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package composer
+
+import (
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"strconv"
+	"strings"
+
+	"code.gitea.io/gitea/models/db"
+	packages_model "code.gitea.io/gitea/models/packages"
+	"code.gitea.io/gitea/modules/context"
+	"code.gitea.io/gitea/modules/convert"
+	packages_module "code.gitea.io/gitea/modules/packages"
+	composer_module "code.gitea.io/gitea/modules/packages/composer"
+	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/routers/api/packages/helper"
+	packages_service "code.gitea.io/gitea/services/packages"
+
+	"github.com/hashicorp/go-version"
+)
+
+func apiError(ctx *context.Context, status int, obj interface{}) {
+	helper.LogAndProcessError(ctx, status, obj, func(message string) {
+		type Error struct {
+			Status  int    `json:"status"`
+			Message string `json:"message"`
+		}
+		ctx.JSON(status, struct {
+			Errors []Error `json:"errors"`
+		}{
+			Errors: []Error{
+				{Status: status, Message: message},
+			},
+		})
+	})
+}
+
+// ServiceIndex displays registry endpoints
+func ServiceIndex(ctx *context.Context) {
+	resp := createServiceIndexResponse(setting.AppURL + "api/packages/" + ctx.Package.Owner.Name + "/composer")
+
+	ctx.JSON(http.StatusOK, resp)
+}
+
+// SearchPackages searches packages, only "q" is supported
+// https://packagist.org/apidoc#search-packages
+func SearchPackages(ctx *context.Context) {
+	page := ctx.FormInt("page")
+	if page < 1 {
+		page = 1
+	}
+	perPage := ctx.FormInt("per_page")
+	paginator := db.ListOptions{
+		Page:     page,
+		PageSize: convert.ToCorrectPageSize(perPage),
+	}
+
+	opts := &packages_model.PackageSearchOptions{
+		OwnerID:   ctx.Package.Owner.ID,
+		Type:      string(packages_model.TypeComposer),
+		QueryName: ctx.FormTrim("q"),
+		Paginator: &paginator,
+	}
+	if ctx.FormTrim("type") != "" {
+		opts.Properties = map[string]string{
+			composer_module.TypeProperty: ctx.FormTrim("type"),
+		}
+	}
+
+	pvs, total, err := packages_model.SearchLatestVersions(ctx, opts)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	nextLink := ""
+	if len(pvs) == paginator.PageSize {
+		u, err := url.Parse(setting.AppURL + "api/packages/" + ctx.Package.Owner.Name + "/composer/search.json")
+		if err != nil {
+			apiError(ctx, http.StatusInternalServerError, err)
+			return
+		}
+		q := u.Query()
+		q.Set("q", ctx.FormTrim("q"))
+		q.Set("type", ctx.FormTrim("type"))
+		q.Set("page", strconv.Itoa(page+1))
+		if perPage != 0 {
+			q.Set("per_page", strconv.Itoa(perPage))
+		}
+		u.RawQuery = q.Encode()
+
+		nextLink = u.String()
+	}
+
+	pds, err := packages_model.GetPackageDescriptors(ctx, pvs)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	resp := createSearchResultResponse(total, pds, nextLink)
+
+	ctx.JSON(http.StatusOK, resp)
+}
+
+// EnumeratePackages lists all package names
+// https://packagist.org/apidoc#list-packages
+func EnumeratePackages(ctx *context.Context) {
+	ps, err := packages_model.GetPackagesByType(db.DefaultContext, ctx.Package.Owner.ID, packages_model.TypeComposer)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	names := make([]string, 0, len(ps))
+	for _, p := range ps {
+		names = append(names, p.Name)
+	}
+
+	ctx.JSON(http.StatusOK, map[string][]string{
+		"packageNames": names,
+	})
+}
+
+// PackageMetadata returns the metadata for a single package
+// https://packagist.org/apidoc#get-package-data
+func PackageMetadata(ctx *context.Context) {
+	vendorName := ctx.Params("vendorname")
+	projectName := ctx.Params("projectname")
+
+	pvs, err := packages_model.GetVersionsByPackageName(ctx, ctx.Package.Owner.ID, packages_model.TypeComposer, vendorName+"/"+projectName)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+	if len(pvs) == 0 {
+		apiError(ctx, http.StatusNotFound, packages_model.ErrPackageNotExist)
+		return
+	}
+
+	pds, err := packages_model.GetPackageDescriptors(ctx, pvs)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	resp := createPackageMetadataResponse(
+		setting.AppURL+"api/packages/"+ctx.Package.Owner.Name+"/composer",
+		pds,
+	)
+
+	ctx.JSON(http.StatusOK, resp)
+}
+
+// DownloadPackageFile serves the content of a package
+func DownloadPackageFile(ctx *context.Context) {
+	s, pf, err := packages_service.GetFileStreamByPackageNameAndVersion(
+		ctx,
+		&packages_service.PackageInfo{
+			Owner:       ctx.Package.Owner,
+			PackageType: packages_model.TypeComposer,
+			Name:        ctx.Params("package"),
+			Version:     ctx.Params("version"),
+		},
+		&packages_service.PackageFileInfo{
+			Filename: ctx.Params("filename"),
+		},
+	)
+	if err != nil {
+		if err == packages_model.ErrPackageNotExist || err == packages_model.ErrPackageFileNotExist {
+			apiError(ctx, http.StatusNotFound, err)
+			return
+		}
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+	defer s.Close()
+
+	ctx.ServeStream(s, pf.Name)
+}
+
+// UploadPackage creates a new package
+func UploadPackage(ctx *context.Context) {
+	buf, err := packages_module.CreateHashedBufferFromReader(ctx.Req.Body, 32*1024*1024)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+	defer buf.Close()
+
+	cp, err := composer_module.ParsePackage(buf, buf.Size())
+	if err != nil {
+		apiError(ctx, http.StatusBadRequest, err)
+		return
+	}
+
+	if _, err := buf.Seek(0, io.SeekStart); err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	if cp.Version == "" {
+		v, err := version.NewVersion(ctx.FormTrim("version"))
+		if err != nil {
+			apiError(ctx, http.StatusBadRequest, composer_module.ErrInvalidVersion)
+			return
+		}
+		cp.Version = v.String()
+	}
+
+	_, _, err = packages_service.CreatePackageAndAddFile(
+		&packages_service.PackageCreationInfo{
+			PackageInfo: packages_service.PackageInfo{
+				Owner:       ctx.Package.Owner,
+				PackageType: packages_model.TypeComposer,
+				Name:        cp.Name,
+				Version:     cp.Version,
+			},
+			SemverCompatible: true,
+			Creator:          ctx.Doer,
+			Metadata:         cp.Metadata,
+			Properties: map[string]string{
+				composer_module.TypeProperty: cp.Type,
+			},
+		},
+		&packages_service.PackageFileCreationInfo{
+			PackageFileInfo: packages_service.PackageFileInfo{
+				Filename: strings.ToLower(fmt.Sprintf("%s.%s.zip", strings.ReplaceAll(cp.Name, "/", "-"), cp.Version)),
+			},
+			Data:   buf,
+			IsLead: true,
+		},
+	)
+	if err != nil {
+		if err == packages_model.ErrDuplicatePackageVersion {
+			apiError(ctx, http.StatusBadRequest, err)
+			return
+		}
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	ctx.Status(http.StatusCreated)
+}

routers/api/packages/conan/auth.go

@@ -0,0 +1,41 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package conan
+
+import (
+	"net/http"
+
+	user_model "code.gitea.io/gitea/models/user"
+	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/services/auth"
+	"code.gitea.io/gitea/services/packages"
+)
+
+type Auth struct{}
+
+func (a *Auth) Name() string {
+	return "conan"
+}
+
+// Verify extracts the user from the Bearer token
+func (a *Auth) Verify(req *http.Request, w http.ResponseWriter, store auth.DataStore, sess auth.SessionStore) *user_model.User {
+	uid, err := packages.ParseAuthorizationToken(req)
+	if err != nil {
+		log.Trace("ParseAuthorizationToken: %v", err)
+		return nil
+	}
+
+	if uid == 0 {
+		return nil
+	}
+
+	u, err := user_model.GetUserByID(uid)
+	if err != nil {
+		log.Error("GetUserByID:  %v", err)
+		return nil
+	}
+
+	return u
+}

routers/api/packages/conan/conan.go

@@ -0,0 +1,818 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package conan
+
+import (
+	"fmt"
+	"io"
+	"net/http"
+	"strings"
+	"time"
+
+	"code.gitea.io/gitea/models/db"
+	packages_model "code.gitea.io/gitea/models/packages"
+	conan_model "code.gitea.io/gitea/models/packages/conan"
+	"code.gitea.io/gitea/modules/context"
+	"code.gitea.io/gitea/modules/json"
+	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/notification"
+	packages_module "code.gitea.io/gitea/modules/packages"
+	conan_module "code.gitea.io/gitea/modules/packages/conan"
+	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/routers/api/packages/helper"
+	packages_service "code.gitea.io/gitea/services/packages"
+)
+
+const (
+	conanfileFile = "conanfile.py"
+	conaninfoFile = "conaninfo.txt"
+
+	recipeReferenceKey  = "RecipeReference"
+	packageReferenceKey = "PackageReference"
+)
+
+type stringSet map[string]struct{}
+
+var (
+	recipeFileList = stringSet{
+		conanfileFile:       struct{}{},
+		"conanmanifest.txt": struct{}{},
+		"conan_sources.tgz": struct{}{},
+		"conan_export.tgz":  struct{}{},
+	}
+	packageFileList = stringSet{
+		conaninfoFile:       struct{}{},
+		"conanmanifest.txt": struct{}{},
+		"conan_package.tgz": struct{}{},
+	}
+)
+
+func jsonResponse(ctx *context.Context, status int, obj interface{}) {
+	// https://github.com/conan-io/conan/issues/6613
+	ctx.Resp.Header().Set("Content-Type", "application/json")
+	ctx.Status(status)
+	if err := json.NewEncoder(ctx.Resp).Encode(obj); err != nil {
+		log.Error("JSON encode: %v", err)
+	}
+}
+
+func apiError(ctx *context.Context, status int, obj interface{}) {
+	helper.LogAndProcessError(ctx, status, obj, func(message string) {
+		jsonResponse(ctx, status, map[string]string{
+			"message": message,
+		})
+	})
+}
+
+func baseURL(ctx *context.Context) string {
+	return setting.AppURL + "api/packages/" + ctx.Package.Owner.Name + "/conan"
+}
+
+// ExtractPathParameters is a middleware to extract common parameters from path
+func ExtractPathParameters(ctx *context.Context) {
+	rref, err := conan_module.NewRecipeReference(
+		ctx.Params("name"),
+		ctx.Params("version"),
+		ctx.Params("user"),
+		ctx.Params("channel"),
+		ctx.Params("recipe_revision"),
+	)
+	if err != nil {
+		apiError(ctx, http.StatusBadRequest, err)
+		return
+	}
+
+	ctx.Data[recipeReferenceKey] = rref
+
+	reference := ctx.Params("package_reference")
+
+	var pref *conan_module.PackageReference
+	if reference != "" {
+		pref, err = conan_module.NewPackageReference(
+			rref,
+			reference,
+			ctx.Params("package_revision"),
+		)
+		if err != nil {
+			apiError(ctx, http.StatusBadRequest, err)
+			return
+		}
+	}
+
+	ctx.Data[packageReferenceKey] = pref
+}
+
+// Ping reports the server capabilities
+func Ping(ctx *context.Context) {
+	ctx.RespHeader().Add("X-Conan-Server-Capabilities", "revisions") // complex_search,checksum_deploy,matrix_params
+
+	ctx.Status(http.StatusOK)
+}
+
+// Authenticate creates an authentication token for the user
+func Authenticate(ctx *context.Context) {
+	if ctx.Doer == nil {
+		apiError(ctx, http.StatusBadRequest, nil)
+		return
+	}
+
+	token, err := packages_service.CreateAuthorizationToken(ctx.Doer)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	ctx.PlainText(http.StatusOK, token)
+}
+
+// CheckCredentials tests if the provided authentication token is valid
+func CheckCredentials(ctx *context.Context) {
+	if ctx.Doer == nil {
+		ctx.Status(http.StatusUnauthorized)
+	} else {
+		ctx.Status(http.StatusOK)
+	}
+}
+
+// RecipeSnapshot displays the recipe files with their md5 hash
+func RecipeSnapshot(ctx *context.Context) {
+	rref := ctx.Data[recipeReferenceKey].(*conan_module.RecipeReference)
+
+	serveSnapshot(ctx, rref.AsKey())
+}
+
+// RecipeSnapshot displays the package files with their md5 hash
+func PackageSnapshot(ctx *context.Context) {
+	pref := ctx.Data[packageReferenceKey].(*conan_module.PackageReference)
+
+	serveSnapshot(ctx, pref.AsKey())
+}
+
+func serveSnapshot(ctx *context.Context, fileKey string) {
+	rref := ctx.Data[recipeReferenceKey].(*conan_module.RecipeReference)
+
+	pv, err := packages_model.GetVersionByNameAndVersion(ctx, ctx.Package.Owner.ID, packages_model.TypeConan, rref.Name, rref.Version)
+	if err != nil {
+		if err == packages_model.ErrPackageNotExist {
+			apiError(ctx, http.StatusNotFound, err)
+		} else {
+			apiError(ctx, http.StatusInternalServerError, err)
+		}
+		return
+	}
+
+	pfs, _, err := packages_model.SearchFiles(ctx, &packages_model.PackageFileSearchOptions{
+		VersionID:    pv.ID,
+		CompositeKey: fileKey,
+	})
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+	if len(pfs) == 0 {
+		apiError(ctx, http.StatusNotFound, nil)
+		return
+	}
+
+	files := make(map[string]string)
+	for _, pf := range pfs {
+		pb, err := packages_model.GetBlobByID(ctx, pf.BlobID)
+		if err != nil {
+			apiError(ctx, http.StatusInternalServerError, err)
+			return
+		}
+		files[pf.Name] = pb.HashMD5
+	}
+
+	jsonResponse(ctx, http.StatusOK, files)
+}
+
+// RecipeDownloadURLs displays the recipe files with their download url
+func RecipeDownloadURLs(ctx *context.Context) {
+	rref := ctx.Data[recipeReferenceKey].(*conan_module.RecipeReference)
+
+	serveDownloadURLs(
+		ctx,
+		rref.AsKey(),
+		fmt.Sprintf(baseURL(ctx)+"/v1/files/%s/recipe", rref.LinkName()),
+	)
+}
+
+// PackageDownloadURLs displays the package files with their download url
+func PackageDownloadURLs(ctx *context.Context) {
+	pref := ctx.Data[packageReferenceKey].(*conan_module.PackageReference)
+
+	serveDownloadURLs(
+		ctx,
+		pref.AsKey(),
+		fmt.Sprintf(baseURL(ctx)+"/v1/files/%s/package/%s", pref.Recipe.LinkName(), pref.LinkName()),
+	)
+}
+
+func serveDownloadURLs(ctx *context.Context, fileKey, downloadURL string) {
+	rref := ctx.Data[recipeReferenceKey].(*conan_module.RecipeReference)
+
+	pv, err := packages_model.GetVersionByNameAndVersion(ctx, ctx.Package.Owner.ID, packages_model.TypeConan, rref.Name, rref.Version)
+	if err != nil {
+		if err == packages_model.ErrPackageNotExist {
+			apiError(ctx, http.StatusNotFound, err)
+		} else {
+			apiError(ctx, http.StatusInternalServerError, err)
+		}
+		return
+	}
+
+	pfs, _, err := packages_model.SearchFiles(ctx, &packages_model.PackageFileSearchOptions{
+		VersionID:    pv.ID,
+		CompositeKey: fileKey,
+	})
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	if len(pfs) == 0 {
+		apiError(ctx, http.StatusNotFound, nil)
+		return
+	}
+
+	urls := make(map[string]string)
+	for _, pf := range pfs {
+		urls[pf.Name] = fmt.Sprintf("%s/%s", downloadURL, pf.Name)
+	}
+
+	jsonResponse(ctx, http.StatusOK, urls)
+}
+
+// RecipeUploadURLs displays the upload urls for the provided recipe files
+func RecipeUploadURLs(ctx *context.Context) {
+	rref := ctx.Data[recipeReferenceKey].(*conan_module.RecipeReference)
+
+	serveUploadURLs(
+		ctx,
+		recipeFileList,
+		fmt.Sprintf(baseURL(ctx)+"/v1/files/%s/recipe", rref.LinkName()),
+	)
+}
+
+// PackageUploadURLs displays the upload urls for the provided package files
+func PackageUploadURLs(ctx *context.Context) {
+	pref := ctx.Data[packageReferenceKey].(*conan_module.PackageReference)
+
+	serveUploadURLs(
+		ctx,
+		packageFileList,
+		fmt.Sprintf(baseURL(ctx)+"/v1/files/%s/package/%s", pref.Recipe.LinkName(), pref.LinkName()),
+	)
+}
+
+func serveUploadURLs(ctx *context.Context, fileFilter stringSet, uploadURL string) {
+	defer ctx.Req.Body.Close()
+
+	var files map[string]int64
+	if err := json.NewDecoder(ctx.Req.Body).Decode(&files); err != nil {
+		apiError(ctx, http.StatusBadRequest, err)
+		return
+	}
+
+	urls := make(map[string]string)
+	for file := range files {
+		if _, ok := fileFilter[file]; ok {
+			urls[file] = fmt.Sprintf("%s/%s", uploadURL, file)
+		}
+	}
+
+	jsonResponse(ctx, http.StatusOK, urls)
+}
+
+// UploadRecipeFile handles the upload of a recipe file
+func UploadRecipeFile(ctx *context.Context) {
+	rref := ctx.Data[recipeReferenceKey].(*conan_module.RecipeReference)
+
+	uploadFile(ctx, recipeFileList, rref.AsKey())
+}
+
+// UploadPackageFile handles the upload of a package file
+func UploadPackageFile(ctx *context.Context) {
+	pref := ctx.Data[packageReferenceKey].(*conan_module.PackageReference)
+
+	uploadFile(ctx, packageFileList, pref.AsKey())
+}
+
+func uploadFile(ctx *context.Context, fileFilter stringSet, fileKey string) {
+	rref := ctx.Data[recipeReferenceKey].(*conan_module.RecipeReference)
+	pref := ctx.Data[packageReferenceKey].(*conan_module.PackageReference)
+
+	filename := ctx.Params("filename")
+	if _, ok := fileFilter[filename]; !ok {
+		apiError(ctx, http.StatusBadRequest, nil)
+		return
+	}
+
+	upload, close, err := ctx.UploadStream()
+	if err != nil {
+		apiError(ctx, http.StatusBadRequest, err)
+		return
+	}
+	if close {
+		defer upload.Close()
+	}
+
+	buf, err := packages_module.CreateHashedBufferFromReader(upload, 32*1024*1024)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+	defer buf.Close()
+
+	if buf.Size() == 0 {
+		// ignore empty uploads, second request contains content
+		jsonResponse(ctx, http.StatusOK, nil)
+		return
+	}
+
+	isConanfileFile := filename == conanfileFile
+
+	pci := &packages_service.PackageCreationInfo{
+		PackageInfo: packages_service.PackageInfo{
+			Owner:       ctx.Package.Owner,
+			PackageType: packages_model.TypeConan,
+			Name:        rref.Name,
+			Version:     rref.Version,
+		},
+		SemverCompatible: true,
+		Creator:          ctx.Doer,
+	}
+	pfci := &packages_service.PackageFileCreationInfo{
+		PackageFileInfo: packages_service.PackageFileInfo{
+			Filename:     strings.ToLower(filename),
+			CompositeKey: fileKey,
+		},
+		Data:   buf,
+		IsLead: isConanfileFile,
+		Properties: map[string]string{
+			conan_module.PropertyRecipeUser:     rref.User,
+			conan_module.PropertyRecipeChannel:  rref.Channel,
+			conan_module.PropertyRecipeRevision: rref.RevisionOrDefault(),
+		},
+		OverwriteExisting: true,
+	}
+
+	if pref != nil {
+		pfci.Properties[conan_module.PropertyPackageReference] = pref.Reference
+		pfci.Properties[conan_module.PropertyPackageRevision] = pref.RevisionOrDefault()
+	}
+
+	if isConanfileFile || filename == conaninfoFile {
+		if isConanfileFile {
+			metadata, err := conan_module.ParseConanfile(buf)
+			if err != nil {
+				log.Error("Error parsing package metadata: %v", err)
+				apiError(ctx, http.StatusInternalServerError, err)
+				return
+			}
+			pv, err := packages_model.GetVersionByNameAndVersion(ctx, pci.Owner.ID, pci.PackageType, pci.Name, pci.Version)
+			if err != nil && err != packages_model.ErrPackageNotExist {
+				apiError(ctx, http.StatusInternalServerError, err)
+				return
+			}
+			if pv != nil {
+				raw, err := json.Marshal(metadata)
+				if err != nil {
+					apiError(ctx, http.StatusInternalServerError, err)
+					return
+				}
+				pv.MetadataJSON = string(raw)
+				if err := packages_model.UpdateVersion(ctx, pv); err != nil {
+					apiError(ctx, http.StatusInternalServerError, err)
+					return
+				}
+			} else {
+				pci.Metadata = metadata
+			}
+		} else {
+			info, err := conan_module.ParseConaninfo(buf)
+			if err != nil {
+				log.Error("Error parsing conan info: %v", err)
+				apiError(ctx, http.StatusInternalServerError, err)
+				return
+			}
+			raw, err := json.Marshal(info)
+			if err != nil {
+				apiError(ctx, http.StatusInternalServerError, err)
+				return
+			}
+			pfci.Properties[conan_module.PropertyPackageInfo] = string(raw)
+		}
+
+		if _, err := buf.Seek(0, io.SeekStart); err != nil {
+			apiError(ctx, http.StatusInternalServerError, err)
+			return
+		}
+	}
+
+	_, _, err = packages_service.CreatePackageOrAddFileToExisting(
+		pci,
+		pfci,
+	)
+	if err != nil {
+		if err == packages_model.ErrDuplicatePackageFile {
+			apiError(ctx, http.StatusBadRequest, err)
+			return
+		}
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	ctx.Status(http.StatusCreated)
+}
+
+// DownloadRecipeFile serves the conent of the requested recipe file
+func DownloadRecipeFile(ctx *context.Context) {
+	rref := ctx.Data[recipeReferenceKey].(*conan_module.RecipeReference)
+
+	downloadFile(ctx, recipeFileList, rref.AsKey())
+}
+
+// DownloadPackageFile serves the conent of the requested package file
+func DownloadPackageFile(ctx *context.Context) {
+	pref := ctx.Data[packageReferenceKey].(*conan_module.PackageReference)
+
+	downloadFile(ctx, packageFileList, pref.AsKey())
+}
+
+func downloadFile(ctx *context.Context, fileFilter stringSet, fileKey string) {
+	rref := ctx.Data[recipeReferenceKey].(*conan_module.RecipeReference)
+
+	filename := ctx.Params("filename")
+	if _, ok := fileFilter[filename]; !ok {
+		apiError(ctx, http.StatusBadRequest, nil)
+		return
+	}
+
+	s, pf, err := packages_service.GetFileStreamByPackageNameAndVersion(
+		ctx,
+		&packages_service.PackageInfo{
+			Owner:       ctx.Package.Owner,
+			PackageType: packages_model.TypeConan,
+			Name:        rref.Name,
+			Version:     rref.Version,
+		},
+		&packages_service.PackageFileInfo{
+			Filename:     filename,
+			CompositeKey: fileKey,
+		},
+	)
+	if err != nil {
+		if err == packages_model.ErrPackageNotExist || err == packages_model.ErrPackageFileNotExist {
+			apiError(ctx, http.StatusNotFound, err)
+			return
+		}
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+	defer s.Close()
+
+	ctx.ServeStream(s, pf.Name)
+}
+
+// DeleteRecipeV1 deletes the requested recipe(s)
+func DeleteRecipeV1(ctx *context.Context) {
+	rref := ctx.Data[recipeReferenceKey].(*conan_module.RecipeReference)
+
+	if err := deleteRecipeOrPackage(ctx, rref, true, nil, false); err != nil {
+		if err == packages_model.ErrPackageNotExist || err == conan_model.ErrPackageReferenceNotExist {
+			apiError(ctx, http.StatusNotFound, err)
+		} else {
+			apiError(ctx, http.StatusInternalServerError, err)
+		}
+		return
+	}
+	ctx.Status(http.StatusOK)
+}
+
+// DeleteRecipeV2 deletes the requested recipe(s) respecting its revisions
+func DeleteRecipeV2(ctx *context.Context) {
+	rref := ctx.Data[recipeReferenceKey].(*conan_module.RecipeReference)
+
+	if err := deleteRecipeOrPackage(ctx, rref, rref.Revision == "", nil, false); err != nil {
+		if err == packages_model.ErrPackageNotExist || err == conan_model.ErrPackageReferenceNotExist {
+			apiError(ctx, http.StatusNotFound, err)
+		} else {
+			apiError(ctx, http.StatusInternalServerError, err)
+		}
+		return
+	}
+	ctx.Status(http.StatusOK)
+}
+
+// DeletePackageV1 deletes the requested package(s)
+func DeletePackageV1(ctx *context.Context) {
+	rref := ctx.Data[recipeReferenceKey].(*conan_module.RecipeReference)
+
+	type PackageReferences struct {
+		References []string `json:"package_ids"`
+	}
+
+	var ids *PackageReferences
+	if err := json.NewDecoder(ctx.Req.Body).Decode(&ids); err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	revisions, err := conan_model.GetRecipeRevisions(ctx, ctx.Package.Owner.ID, rref)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+	for _, revision := range revisions {
+		currentRref := rref.WithRevision(revision.Value)
+
+		var references []*conan_model.PropertyValue
+		if len(ids.References) == 0 {
+			if references, err = conan_model.GetPackageReferences(ctx, ctx.Package.Owner.ID, currentRref); err != nil {
+				apiError(ctx, http.StatusInternalServerError, err)
+				return
+			}
+		} else {
+			for _, reference := range ids.References {
+				references = append(references, &conan_model.PropertyValue{Value: reference})
+			}
+		}
+
+		for _, reference := range references {
+			pref, _ := conan_module.NewPackageReference(currentRref, reference.Value, conan_module.DefaultRevision)
+			if err := deleteRecipeOrPackage(ctx, currentRref, true, pref, true); err != nil {
+				if err == packages_model.ErrPackageNotExist || err == conan_model.ErrPackageReferenceNotExist {
+					apiError(ctx, http.StatusNotFound, err)
+				} else {
+					apiError(ctx, http.StatusInternalServerError, err)
+				}
+				return
+			}
+		}
+	}
+	ctx.Status(http.StatusOK)
+}
+
+// DeletePackageV2 deletes the requested package(s) respecting its revisions
+func DeletePackageV2(ctx *context.Context) {
+	rref := ctx.Data[recipeReferenceKey].(*conan_module.RecipeReference)
+	pref := ctx.Data[packageReferenceKey].(*conan_module.PackageReference)
+
+	if pref != nil { // has package reference
+		if err := deleteRecipeOrPackage(ctx, rref, false, pref, pref.Revision == ""); err != nil {
+			if err == packages_model.ErrPackageNotExist || err == conan_model.ErrPackageReferenceNotExist {
+				apiError(ctx, http.StatusNotFound, err)
+			} else {
+				apiError(ctx, http.StatusInternalServerError, err)
+			}
+		} else {
+			ctx.Status(http.StatusOK)
+		}
+		return
+	}
+
+	references, err := conan_model.GetPackageReferences(ctx, ctx.Package.Owner.ID, rref)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+	if len(references) == 0 {
+		apiError(ctx, http.StatusNotFound, conan_model.ErrPackageReferenceNotExist)
+		return
+	}
+
+	for _, reference := range references {
+		pref, _ := conan_module.NewPackageReference(rref, reference.Value, conan_module.DefaultRevision)
+
+		if err := deleteRecipeOrPackage(ctx, rref, false, pref, true); err != nil {
+			if err == packages_model.ErrPackageNotExist || err == conan_model.ErrPackageReferenceNotExist {
+				apiError(ctx, http.StatusNotFound, err)
+			} else {
+				apiError(ctx, http.StatusInternalServerError, err)
+			}
+			return
+		}
+	}
+
+	ctx.Status(http.StatusOK)
+}
+
+func deleteRecipeOrPackage(apictx *context.Context, rref *conan_module.RecipeReference, ignoreRecipeRevision bool, pref *conan_module.PackageReference, ignorePackageRevision bool) error {
+	ctx, committer, err := db.TxContext()
+	if err != nil {
+		return err
+	}
+	defer committer.Close()
+
+	pv, err := packages_model.GetVersionByNameAndVersion(ctx, apictx.Package.Owner.ID, packages_model.TypeConan, rref.Name, rref.Version)
+	if err != nil {
+		return err
+	}
+
+	pd, err := packages_model.GetPackageDescriptor(ctx, pv)
+	if err != nil {
+		return err
+	}
+
+	filter := map[string]string{
+		conan_module.PropertyRecipeUser:    rref.User,
+		conan_module.PropertyRecipeChannel: rref.Channel,
+	}
+	if !ignoreRecipeRevision {
+		filter[conan_module.PropertyRecipeRevision] = rref.RevisionOrDefault()
+	}
+	if pref != nil {
+		filter[conan_module.PropertyPackageReference] = pref.Reference
+		if !ignorePackageRevision {
+			filter[conan_module.PropertyPackageRevision] = pref.RevisionOrDefault()
+		}
+	}
+
+	pfs, _, err := packages_model.SearchFiles(ctx, &packages_model.PackageFileSearchOptions{
+		VersionID:  pv.ID,
+		Properties: filter,
+	})
+	if err != nil {
+		return err
+	}
+	if len(pfs) == 0 {
+		return conan_model.ErrPackageReferenceNotExist
+	}
+
+	for _, pf := range pfs {
+		if err := packages_model.DeleteAllProperties(ctx, packages_model.PropertyTypeFile, pf.ID); err != nil {
+			return err
+		}
+		if err := packages_model.DeleteFileByID(ctx, pf.ID); err != nil {
+			return err
+		}
+	}
+
+	versionDeleted := false
+	has, err := packages_model.HasVersionFileReferences(ctx, pv.ID)
+	if err != nil {
+		return err
+	}
+	if !has {
+		versionDeleted = true
+
+		if err := packages_model.DeleteAllProperties(ctx, packages_model.PropertyTypeVersion, pv.ID); err != nil {
+			return err
+		}
+
+		if err := packages_model.DeleteVersionByID(ctx, pv.ID); err != nil {
+			return err
+		}
+	}
+
+	if err := committer.Commit(); err != nil {
+		return err
+	}
+
+	if versionDeleted {
+		notification.NotifyPackageDelete(apictx.Doer, pd)
+	}
+
+	return nil
+}
+
+// ListRecipeRevisions gets a list of all recipe revisions
+func ListRecipeRevisions(ctx *context.Context) {
+	rref := ctx.Data[recipeReferenceKey].(*conan_module.RecipeReference)
+
+	revisions, err := conan_model.GetRecipeRevisions(ctx, ctx.Package.Owner.ID, rref)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	listRevisions(ctx, revisions)
+}
+
+// ListPackageRevisions gets a list of all package revisions
+func ListPackageRevisions(ctx *context.Context) {
+	pref := ctx.Data[packageReferenceKey].(*conan_module.PackageReference)
+
+	revisions, err := conan_model.GetPackageRevisions(ctx, ctx.Package.Owner.ID, pref)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	listRevisions(ctx, revisions)
+}
+
+type revisionInfo struct {
+	Revision string    `json:"revision"`
+	Time     time.Time `json:"time"`
+}
+
+func listRevisions(ctx *context.Context, revisions []*conan_model.PropertyValue) {
+	if len(revisions) == 0 {
+		apiError(ctx, http.StatusNotFound, conan_model.ErrRecipeReferenceNotExist)
+		return
+	}
+
+	type RevisionList struct {
+		Revisions []*revisionInfo `json:"revisions"`
+	}
+
+	revs := make([]*revisionInfo, 0, len(revisions))
+	for _, rev := range revisions {
+		revs = append(revs, &revisionInfo{Revision: rev.Value, Time: time.Unix(int64(rev.CreatedUnix), 0)})
+	}
+
+	jsonResponse(ctx, http.StatusOK, &RevisionList{revs})
+}
+
+// LatestRecipeRevision gets the latest recipe revision
+func LatestRecipeRevision(ctx *context.Context) {
+	rref := ctx.Data[recipeReferenceKey].(*conan_module.RecipeReference)
+
+	revision, err := conan_model.GetLastRecipeRevision(ctx, ctx.Package.Owner.ID, rref)
+	if err != nil {
+		if err == conan_model.ErrRecipeReferenceNotExist || err == conan_model.ErrPackageReferenceNotExist {
+			apiError(ctx, http.StatusNotFound, err)
+		} else {
+			apiError(ctx, http.StatusInternalServerError, err)
+		}
+		return
+	}
+
+	jsonResponse(ctx, http.StatusOK, &revisionInfo{Revision: revision.Value, Time: time.Unix(int64(revision.CreatedUnix), 0)})
+}
+
+// LatestPackageRevision gets the latest package revision
+func LatestPackageRevision(ctx *context.Context) {
+	pref := ctx.Data[packageReferenceKey].(*conan_module.PackageReference)
+
+	revision, err := conan_model.GetLastPackageRevision(ctx, ctx.Package.Owner.ID, pref)
+	if err != nil {
+		if err == conan_model.ErrRecipeReferenceNotExist || err == conan_model.ErrPackageReferenceNotExist {
+			apiError(ctx, http.StatusNotFound, err)
+		} else {
+			apiError(ctx, http.StatusInternalServerError, err)
+		}
+		return
+	}
+
+	jsonResponse(ctx, http.StatusOK, &revisionInfo{Revision: revision.Value, Time: time.Unix(int64(revision.CreatedUnix), 0)})
+}
+
+// ListRecipeRevisionFiles gets a list of all recipe revision files
+func ListRecipeRevisionFiles(ctx *context.Context) {
+	rref := ctx.Data[recipeReferenceKey].(*conan_module.RecipeReference)
+
+	listRevisionFiles(ctx, rref.AsKey())
+}
+
+// ListPackageRevisionFiles gets a list of all package revision files
+func ListPackageRevisionFiles(ctx *context.Context) {
+	pref := ctx.Data[packageReferenceKey].(*conan_module.PackageReference)
+
+	listRevisionFiles(ctx, pref.AsKey())
+}
+
+func listRevisionFiles(ctx *context.Context, fileKey string) {
+	rref := ctx.Data[recipeReferenceKey].(*conan_module.RecipeReference)
+
+	pv, err := packages_model.GetVersionByNameAndVersion(ctx, ctx.Package.Owner.ID, packages_model.TypeConan, rref.Name, rref.Version)
+	if err != nil {
+		if err == packages_model.ErrPackageNotExist {
+			apiError(ctx, http.StatusNotFound, err)
+		} else {
+			apiError(ctx, http.StatusInternalServerError, err)
+		}
+		return
+	}
+
+	pfs, _, err := packages_model.SearchFiles(ctx, &packages_model.PackageFileSearchOptions{
+		VersionID:    pv.ID,
+		CompositeKey: fileKey,
+	})
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+	if len(pfs) == 0 {
+		apiError(ctx, http.StatusNotFound, nil)
+		return
+	}
+
+	files := make(map[string]interface{})
+	for _, pf := range pfs {
+		files[pf.Name] = nil
+	}
+
+	type FileList struct {
+		Files map[string]interface{} `json:"files"`
+	}
+
+	jsonResponse(ctx, http.StatusOK, &FileList{
+		Files: files,
+	})
+}

routers/api/packages/conan/search.go

@@ -0,0 +1,164 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package conan
+
+import (
+	"net/http"
+	"strings"
+
+	conan_model "code.gitea.io/gitea/models/packages/conan"
+	user_model "code.gitea.io/gitea/models/user"
+	"code.gitea.io/gitea/modules/context"
+	"code.gitea.io/gitea/modules/json"
+	conan_module "code.gitea.io/gitea/modules/packages/conan"
+)
+
+// SearchResult contains the found recipe names
+type SearchResult struct {
+	Results []string `json:"results"`
+}
+
+// SearchRecipes searches all recipes matching the query
+func SearchRecipes(ctx *context.Context) {
+	q := ctx.FormTrim("q")
+
+	opts := parseQuery(ctx.Package.Owner, q)
+
+	results, err := conan_model.SearchRecipes(ctx, opts)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	jsonResponse(ctx, http.StatusOK, &SearchResult{
+		Results: results,
+	})
+}
+
+// parseQuery creates search options for the given query
+func parseQuery(owner *user_model.User, query string) *conan_model.RecipeSearchOptions {
+	opts := &conan_model.RecipeSearchOptions{
+		OwnerID: owner.ID,
+	}
+
+	if query != "" {
+		parts := strings.Split(strings.ReplaceAll(query, "@", "/"), "/")
+
+		opts.Name = parts[0]
+		if len(parts) > 1 && parts[1] != "*" {
+			opts.Version = parts[1]
+		}
+		if len(parts) > 2 && parts[2] != "*" {
+			opts.User = parts[2]
+		}
+		if len(parts) > 3 && parts[3] != "*" {
+			opts.Channel = parts[3]
+		}
+	}
+
+	return opts
+}
+
+// SearchPackagesV1 searches all packages of a recipe (Conan v1 endpoint)
+func SearchPackagesV1(ctx *context.Context) {
+	searchPackages(ctx, true)
+}
+
+// SearchPackagesV2 searches all packages of a recipe (Conan v2 endpoint)
+func SearchPackagesV2(ctx *context.Context) {
+	searchPackages(ctx, false)
+}
+
+func searchPackages(ctx *context.Context, searchAllRevisions bool) {
+	rref := ctx.Data[recipeReferenceKey].(*conan_module.RecipeReference)
+
+	if !searchAllRevisions && rref.Revision == "" {
+		lastRevision, err := conan_model.GetLastRecipeRevision(ctx, ctx.Package.Owner.ID, rref)
+		if err != nil {
+			if err == conan_model.ErrRecipeReferenceNotExist {
+				apiError(ctx, http.StatusNotFound, err)
+			} else {
+				apiError(ctx, http.StatusInternalServerError, err)
+			}
+			return
+		}
+		rref = rref.WithRevision(lastRevision.Value)
+	} else {
+		has, err := conan_model.RecipeExists(ctx, ctx.Package.Owner.ID, rref)
+		if err != nil {
+			if err == conan_model.ErrRecipeReferenceNotExist {
+				apiError(ctx, http.StatusNotFound, err)
+			} else {
+				apiError(ctx, http.StatusInternalServerError, err)
+			}
+			return
+		}
+		if !has {
+			apiError(ctx, http.StatusNotFound, nil)
+			return
+		}
+	}
+
+	recipeRevisions := []*conan_model.PropertyValue{{Value: rref.Revision}}
+	if searchAllRevisions {
+		var err error
+		recipeRevisions, err = conan_model.GetRecipeRevisions(ctx, ctx.Package.Owner.ID, rref)
+		if err != nil {
+			apiError(ctx, http.StatusInternalServerError, err)
+			return
+		}
+	}
+
+	result := make(map[string]*conan_module.Conaninfo)
+
+	for _, recipeRevision := range recipeRevisions {
+		currentRef := rref
+		if recipeRevision.Value != "" {
+			currentRef = rref.WithRevision(recipeRevision.Value)
+		}
+		packageReferences, err := conan_model.GetPackageReferences(ctx, ctx.Package.Owner.ID, currentRef)
+		if err != nil {
+			if err == conan_model.ErrRecipeReferenceNotExist {
+				apiError(ctx, http.StatusNotFound, err)
+			} else {
+				apiError(ctx, http.StatusInternalServerError, err)
+			}
+			return
+		}
+		for _, packageReference := range packageReferences {
+			if _, ok := result[packageReference.Value]; ok {
+				continue
+			}
+			pref, _ := conan_module.NewPackageReference(currentRef, packageReference.Value, "")
+			lastPackageRevision, err := conan_model.GetLastPackageRevision(ctx, ctx.Package.Owner.ID, pref)
+			if err != nil {
+				if err == conan_model.ErrPackageReferenceNotExist {
+					apiError(ctx, http.StatusNotFound, err)
+				} else {
+					apiError(ctx, http.StatusInternalServerError, err)
+				}
+				return
+			}
+			pref = pref.WithRevision(lastPackageRevision.Value)
+			infoRaw, err := conan_model.GetPackageInfo(ctx, ctx.Package.Owner.ID, pref)
+			if err != nil {
+				if err == conan_model.ErrPackageReferenceNotExist {
+					apiError(ctx, http.StatusNotFound, err)
+				} else {
+					apiError(ctx, http.StatusInternalServerError, err)
+				}
+				return
+			}
+			var info *conan_module.Conaninfo
+			if err := json.Unmarshal([]byte(infoRaw), &info); err != nil {
+				apiError(ctx, http.StatusInternalServerError, err)
+				return
+			}
+			result[pref.Reference] = info
+		}
+	}
+
+	jsonResponse(ctx, http.StatusOK, result)
+}

routers/api/packages/container/auth.go

@@ -0,0 +1,45 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package container
+
+import (
+	"net/http"
+
+	user_model "code.gitea.io/gitea/models/user"
+	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/services/auth"
+	"code.gitea.io/gitea/services/packages"
+)
+
+type Auth struct{}
+
+func (a *Auth) Name() string {
+	return "container"
+}
+
+// Verify extracts the user from the Bearer token
+// If it's an anonymous session a ghost user is returned
+func (a *Auth) Verify(req *http.Request, w http.ResponseWriter, store auth.DataStore, sess auth.SessionStore) *user_model.User {
+	uid, err := packages.ParseAuthorizationToken(req)
+	if err != nil {
+		log.Trace("ParseAuthorizationToken: %v", err)
+		return nil
+	}
+
+	if uid == 0 {
+		return nil
+	}
+	if uid == -1 {
+		return user_model.NewGhostUser()
+	}
+
+	u, err := user_model.GetUserByID(uid)
+	if err != nil {
+		log.Error("GetUserByID:  %v", err)
+		return nil
+	}
+
+	return u
+}

routers/api/packages/container/blob.go

@@ -0,0 +1,136 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package container
+
+import (
+	"context"
+	"encoding/hex"
+	"fmt"
+	"strings"
+
+	"code.gitea.io/gitea/models/db"
+	packages_model "code.gitea.io/gitea/models/packages"
+	container_model "code.gitea.io/gitea/models/packages/container"
+	"code.gitea.io/gitea/modules/log"
+	packages_module "code.gitea.io/gitea/modules/packages"
+	container_module "code.gitea.io/gitea/modules/packages/container"
+	packages_service "code.gitea.io/gitea/services/packages"
+)
+
+// saveAsPackageBlob creates a package blob from an upload
+// The uploaded blob gets stored in a special upload version to link them to the package/image
+func saveAsPackageBlob(hsr packages_module.HashedSizeReader, pi *packages_service.PackageInfo) (*packages_model.PackageBlob, error) {
+	pb := packages_service.NewPackageBlob(hsr)
+
+	exists := false
+
+	contentStore := packages_module.NewContentStore()
+
+	err := db.WithTx(func(ctx context.Context) error {
+		p := &packages_model.Package{
+			OwnerID:   pi.Owner.ID,
+			Type:      packages_model.TypeContainer,
+			Name:      strings.ToLower(pi.Name),
+			LowerName: strings.ToLower(pi.Name),
+		}
+		var err error
+		if p, err = packages_model.TryInsertPackage(ctx, p); err != nil {
+			if err != packages_model.ErrDuplicatePackage {
+				log.Error("Error inserting package: %v", err)
+				return err
+			}
+		}
+
+		pv := &packages_model.PackageVersion{
+			PackageID:    p.ID,
+			CreatorID:    pi.Owner.ID,
+			Version:      container_model.UploadVersion,
+			LowerVersion: container_model.UploadVersion,
+			IsInternal:   true,
+			MetadataJSON: "null",
+		}
+		if pv, err = packages_model.GetOrInsertVersion(ctx, pv); err != nil {
+			if err != packages_model.ErrDuplicatePackageVersion {
+				log.Error("Error inserting package: %v", err)
+				return err
+			}
+		}
+
+		pb, exists, err = packages_model.GetOrInsertBlob(ctx, pb)
+		if err != nil {
+			log.Error("Error inserting package blob: %v", err)
+			return err
+		}
+		if !exists {
+			if err := contentStore.Save(packages_module.BlobHash256Key(pb.HashSHA256), hsr, hsr.Size()); err != nil {
+				log.Error("Error saving package blob in content store: %v", err)
+				return err
+			}
+		}
+
+		filename := strings.ToLower(fmt.Sprintf("sha256_%s", pb.HashSHA256))
+
+		pf := &packages_model.PackageFile{
+			VersionID:    pv.ID,
+			BlobID:       pb.ID,
+			Name:         filename,
+			LowerName:    filename,
+			CompositeKey: packages_model.EmptyFileKey,
+		}
+		if pf, err = packages_model.TryInsertFile(ctx, pf); err != nil {
+			if err == packages_model.ErrDuplicatePackageFile {
+				return nil
+			}
+			log.Error("Error inserting package file: %v", err)
+			return err
+		}
+
+		if _, err := packages_model.InsertProperty(ctx, packages_model.PropertyTypeFile, pf.ID, container_module.PropertyDigest, digestFromPackageBlob(pb)); err != nil {
+			log.Error("Error setting package file property: %v", err)
+			return err
+		}
+
+		return nil
+	})
+	if err != nil {
+		if !exists {
+			if err := contentStore.Delete(packages_module.BlobHash256Key(pb.HashSHA256)); err != nil {
+				log.Error("Error deleting package blob from content store: %v", err)
+			}
+		}
+		return nil, err
+	}
+
+	return pb, nil
+}
+
+func deleteBlob(ownerID int64, image, digest string) error {
+	return db.WithTx(func(ctx context.Context) error {
+		pfds, err := container_model.GetContainerBlobs(ctx, &container_model.BlobSearchOptions{
+			OwnerID: ownerID,
+			Image:   image,
+			Digest:  digest,
+		})
+		if err != nil {
+			return err
+		}
+
+		for _, file := range pfds {
+			if err := packages_service.DeletePackageFile(ctx, file.File); err != nil {
+				return err
+			}
+		}
+		return nil
+	})
+}
+
+func digestFromHashSummer(h packages_module.HashSummer) string {
+	_, _, hashSHA256, _ := h.Sums()
+	return "sha256:" + hex.EncodeToString(hashSHA256)
+}
+
+func digestFromPackageBlob(pb *packages_model.PackageBlob) string {
+	return "sha256:" + pb.HashSHA256
+}

routers/api/packages/container/container.go

@@ -0,0 +1,613 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package container
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"regexp"
+	"strconv"
+	"strings"
+
+	packages_model "code.gitea.io/gitea/models/packages"
+	container_model "code.gitea.io/gitea/models/packages/container"
+	user_model "code.gitea.io/gitea/models/user"
+	"code.gitea.io/gitea/modules/context"
+	"code.gitea.io/gitea/modules/json"
+	"code.gitea.io/gitea/modules/log"
+	packages_module "code.gitea.io/gitea/modules/packages"
+	container_module "code.gitea.io/gitea/modules/packages/container"
+	"code.gitea.io/gitea/modules/packages/container/oci"
+	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/routers/api/packages/helper"
+	packages_service "code.gitea.io/gitea/services/packages"
+	container_service "code.gitea.io/gitea/services/packages/container"
+)
+
+// maximum size of a container manifest
+// https://github.com/opencontainers/distribution-spec/blob/main/spec.md#pushing-manifests
+const maxManifestSize = 10 * 1024 * 1024
+
+var imageNamePattern = regexp.MustCompile(`\A[a-z0-9]+([._-][a-z0-9]+)*(/[a-z0-9]+([._-][a-z0-9]+)*)*\z`)
+
+type containerHeaders struct {
+	Status        int
+	ContentDigest string
+	UploadUUID    string
+	Range         string
+	Location      string
+	ContentType   string
+	ContentLength int64
+}
+
+// https://github.com/opencontainers/distribution-spec/blob/main/spec.md#legacy-docker-support-http-headers
+func setResponseHeaders(resp http.ResponseWriter, h *containerHeaders) {
+	if h.Location != "" {
+		resp.Header().Set("Location", h.Location)
+	}
+	if h.Range != "" {
+		resp.Header().Set("Range", h.Range)
+	}
+	if h.ContentType != "" {
+		resp.Header().Set("Content-Type", h.ContentType)
+	}
+	if h.ContentLength != 0 {
+		resp.Header().Set("Content-Length", strconv.FormatInt(h.ContentLength, 10))
+	}
+	if h.UploadUUID != "" {
+		resp.Header().Set("Docker-Upload-Uuid", h.UploadUUID)
+	}
+	if h.ContentDigest != "" {
+		resp.Header().Set("Docker-Content-Digest", h.ContentDigest)
+		resp.Header().Set("ETag", fmt.Sprintf(`"%s"`, h.ContentDigest))
+	}
+	resp.Header().Set("Docker-Distribution-Api-Version", "registry/2.0")
+	resp.WriteHeader(h.Status)
+}
+
+func jsonResponse(ctx *context.Context, status int, obj interface{}) {
+	setResponseHeaders(ctx.Resp, &containerHeaders{
+		Status:      status,
+		ContentType: "application/json",
+	})
+	if err := json.NewEncoder(ctx.Resp).Encode(obj); err != nil {
+		log.Error("JSON encode: %v", err)
+	}
+}
+
+func apiError(ctx *context.Context, status int, err error) {
+	helper.LogAndProcessError(ctx, status, err, func(message string) {
+		setResponseHeaders(ctx.Resp, &containerHeaders{
+			Status: status,
+		})
+	})
+}
+
+// https://github.com/opencontainers/distribution-spec/blob/main/spec.md#error-codes
+func apiErrorDefined(ctx *context.Context, err *namedError) {
+	type ContainerError struct {
+		Code    string `json:"code"`
+		Message string `json:"message"`
+	}
+
+	type ContainerErrors struct {
+		Errors []ContainerError `json:"errors"`
+	}
+
+	jsonResponse(ctx, err.StatusCode, ContainerErrors{
+		Errors: []ContainerError{
+			{
+				Code:    err.Code,
+				Message: err.Message,
+			},
+		},
+	})
+}
+
+// ReqContainerAccess is a middleware which checks the current user valid (real user or ghost for anonymous access)
+func ReqContainerAccess(ctx *context.Context) {
+	if ctx.Doer == nil {
+		ctx.Resp.Header().Add("WWW-Authenticate", `Bearer realm="`+setting.AppURL+`v2/token"`)
+		ctx.Resp.Header().Add("WWW-Authenticate", `Basic`)
+		apiErrorDefined(ctx, errUnauthorized)
+	}
+}
+
+// VerifyImageName is a middleware which checks if the image name is allowed
+func VerifyImageName(ctx *context.Context) {
+	if !imageNamePattern.MatchString(ctx.Params("image")) {
+		apiErrorDefined(ctx, errNameInvalid)
+	}
+}
+
+// DetermineSupport is used to test if the registry supports OCI
+// https://github.com/opencontainers/distribution-spec/blob/main/spec.md#determining-support
+func DetermineSupport(ctx *context.Context) {
+	setResponseHeaders(ctx.Resp, &containerHeaders{
+		Status: http.StatusOK,
+	})
+}
+
+// Authenticate creates a token for the current user
+// If the current user is anonymous, the ghost user is used
+func Authenticate(ctx *context.Context) {
+	u := ctx.Doer
+	if u == nil {
+		u = user_model.NewGhostUser()
+	}
+
+	token, err := packages_service.CreateAuthorizationToken(u)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	ctx.JSON(http.StatusOK, map[string]string{
+		"token": token,
+	})
+}
+
+// https://github.com/opencontainers/distribution-spec/blob/main/spec.md#mounting-a-blob-from-another-repository
+// https://github.com/opencontainers/distribution-spec/blob/main/spec.md#single-post
+// https://github.com/opencontainers/distribution-spec/blob/main/spec.md#pushing-a-blob-in-chunks
+func InitiateUploadBlob(ctx *context.Context) {
+	image := ctx.Params("image")
+
+	mount := ctx.FormTrim("mount")
+	from := ctx.FormTrim("from")
+	if mount != "" {
+		blob, _ := container_model.GetContainerBlob(ctx, &container_model.BlobSearchOptions{
+			Image:  from,
+			Digest: mount,
+		})
+		if blob != nil {
+			setResponseHeaders(ctx.Resp, &containerHeaders{
+				Location:      fmt.Sprintf("/v2/%s/%s/blobs/%s", ctx.Package.Owner.LowerName, image, mount),
+				ContentDigest: mount,
+				Status:        http.StatusCreated,
+			})
+			return
+		}
+	}
+
+	digest := ctx.FormTrim("digest")
+	if digest != "" {
+		buf, err := packages_module.CreateHashedBufferFromReader(ctx.Req.Body, 32*1024*1024)
+		if err != nil {
+			apiError(ctx, http.StatusInternalServerError, err)
+			return
+		}
+		defer buf.Close()
+
+		if digest != digestFromHashSummer(buf) {
+			apiErrorDefined(ctx, errDigestInvalid)
+			return
+		}
+
+		if _, err := saveAsPackageBlob(buf, &packages_service.PackageInfo{Owner: ctx.Package.Owner, Name: image}); err != nil {
+			apiError(ctx, http.StatusInternalServerError, err)
+			return
+		}
+
+		setResponseHeaders(ctx.Resp, &containerHeaders{
+			Location:      fmt.Sprintf("/v2/%s/%s/blobs/%s", ctx.Package.Owner.LowerName, image, digest),
+			ContentDigest: digest,
+			Status:        http.StatusCreated,
+		})
+		return
+	}
+
+	upload, err := packages_model.CreateBlobUpload(ctx)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	setResponseHeaders(ctx.Resp, &containerHeaders{
+		Location:   fmt.Sprintf("/v2/%s/%s/blobs/uploads/%s", ctx.Package.Owner.LowerName, image, upload.ID),
+		Range:      "0-0",
+		UploadUUID: upload.ID,
+		Status:     http.StatusAccepted,
+	})
+}
+
+// https://github.com/opencontainers/distribution-spec/blob/main/spec.md#pushing-a-blob-in-chunks
+func UploadBlob(ctx *context.Context) {
+	image := ctx.Params("image")
+
+	uploader, err := container_service.NewBlobUploader(ctx, ctx.Params("uuid"))
+	if err != nil {
+		if err == packages_model.ErrPackageBlobUploadNotExist {
+			apiErrorDefined(ctx, errBlobUploadUnknown)
+		} else {
+			apiError(ctx, http.StatusInternalServerError, err)
+		}
+		return
+	}
+	defer uploader.Close()
+
+	contentRange := ctx.Req.Header.Get("Content-Range")
+	if contentRange != "" {
+		start, end := 0, 0
+		if _, err := fmt.Sscanf(contentRange, "%d-%d", &start, &end); err != nil {
+			apiErrorDefined(ctx, errBlobUploadInvalid)
+			return
+		}
+
+		if int64(start) != uploader.Size() {
+			apiErrorDefined(ctx, errBlobUploadInvalid.WithStatusCode(http.StatusRequestedRangeNotSatisfiable))
+			return
+		}
+	} else if uploader.Size() != 0 {
+		apiErrorDefined(ctx, errBlobUploadInvalid.WithMessage("Stream uploads after first write are not allowed"))
+		return
+	}
+
+	if err := uploader.Append(ctx, ctx.Req.Body); err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	setResponseHeaders(ctx.Resp, &containerHeaders{
+		Location:   fmt.Sprintf("/v2/%s/%s/blobs/uploads/%s", ctx.Package.Owner.LowerName, image, uploader.ID),
+		Range:      fmt.Sprintf("0-%d", uploader.Size()-1),
+		UploadUUID: uploader.ID,
+		Status:     http.StatusAccepted,
+	})
+}
+
+// https://github.com/opencontainers/distribution-spec/blob/main/spec.md#pushing-a-blob-in-chunks
+func EndUploadBlob(ctx *context.Context) {
+	image := ctx.Params("image")
+
+	digest := ctx.FormTrim("digest")
+	if digest == "" {
+		apiErrorDefined(ctx, errDigestInvalid)
+		return
+	}
+
+	uploader, err := container_service.NewBlobUploader(ctx, ctx.Params("uuid"))
+	if err != nil {
+		if err == packages_model.ErrPackageBlobUploadNotExist {
+			apiErrorDefined(ctx, errBlobUploadUnknown)
+		} else {
+			apiError(ctx, http.StatusInternalServerError, err)
+		}
+		return
+	}
+	close := true
+	defer func() {
+		if close {
+			uploader.Close()
+		}
+	}()
+
+	if ctx.Req.Body != nil {
+		if err := uploader.Append(ctx, ctx.Req.Body); err != nil {
+			apiError(ctx, http.StatusInternalServerError, err)
+			return
+		}
+	}
+
+	if digest != digestFromHashSummer(uploader) {
+		apiErrorDefined(ctx, errDigestInvalid)
+		return
+	}
+
+	if _, err := saveAsPackageBlob(uploader, &packages_service.PackageInfo{Owner: ctx.Package.Owner, Name: image}); err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	if err := uploader.Close(); err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+	close = false
+
+	if err := container_service.RemoveBlobUploadByID(ctx, uploader.ID); err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	setResponseHeaders(ctx.Resp, &containerHeaders{
+		Location:      fmt.Sprintf("/v2/%s/%s/blobs/%s", ctx.Package.Owner.LowerName, image, digest),
+		ContentDigest: digest,
+		Status:        http.StatusCreated,
+	})
+}
+
+func getBlobFromContext(ctx *context.Context) (*packages_model.PackageFileDescriptor, error) {
+	digest := ctx.Params("digest")
+
+	if !oci.Digest(digest).Validate() {
+		return nil, container_model.ErrContainerBlobNotExist
+	}
+
+	return container_model.GetContainerBlob(ctx, &container_model.BlobSearchOptions{
+		OwnerID: ctx.Package.Owner.ID,
+		Image:   ctx.Params("image"),
+		Digest:  digest,
+	})
+}
+
+// https://github.com/opencontainers/distribution-spec/blob/main/spec.md#checking-if-content-exists-in-the-registry
+func HeadBlob(ctx *context.Context) {
+	blob, err := getBlobFromContext(ctx)
+	if err != nil {
+		if err == container_model.ErrContainerBlobNotExist {
+			apiErrorDefined(ctx, errBlobUnknown)
+		} else {
+			apiError(ctx, http.StatusInternalServerError, err)
+		}
+		return
+	}
+
+	setResponseHeaders(ctx.Resp, &containerHeaders{
+		ContentDigest: blob.Properties.GetByName(container_module.PropertyDigest),
+		ContentLength: blob.Blob.Size,
+		Status:        http.StatusOK,
+	})
+}
+
+// https://github.com/opencontainers/distribution-spec/blob/main/spec.md#pulling-blobs
+func GetBlob(ctx *context.Context) {
+	blob, err := getBlobFromContext(ctx)
+	if err != nil {
+		if err == container_model.ErrContainerBlobNotExist {
+			apiErrorDefined(ctx, errBlobUnknown)
+		} else {
+			apiError(ctx, http.StatusInternalServerError, err)
+		}
+		return
+	}
+
+	s, err := packages_module.NewContentStore().Get(packages_module.BlobHash256Key(blob.Blob.HashSHA256))
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+	defer s.Close()
+
+	setResponseHeaders(ctx.Resp, &containerHeaders{
+		ContentDigest: blob.Properties.GetByName(container_module.PropertyDigest),
+		ContentType:   blob.Properties.GetByName(container_module.PropertyMediaType),
+		ContentLength: blob.Blob.Size,
+		Status:        http.StatusOK,
+	})
+	if _, err := io.Copy(ctx.Resp, s); err != nil {
+		log.Error("Error whilst copying content to response: %v", err)
+	}
+}
+
+// https://github.com/opencontainers/distribution-spec/blob/main/spec.md#deleting-blobs
+func DeleteBlob(ctx *context.Context) {
+	digest := ctx.Params("digest")
+
+	if !oci.Digest(digest).Validate() {
+		apiErrorDefined(ctx, errBlobUnknown)
+		return
+	}
+
+	if err := deleteBlob(ctx.Package.Owner.ID, ctx.Params("image"), digest); err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	setResponseHeaders(ctx.Resp, &containerHeaders{
+		Status: http.StatusAccepted,
+	})
+}
+
+// https://github.com/opencontainers/distribution-spec/blob/main/spec.md#pushing-manifests
+func UploadManifest(ctx *context.Context) {
+	reference := ctx.Params("reference")
+
+	mci := &manifestCreationInfo{
+		MediaType: oci.MediaType(ctx.Req.Header.Get("Content-Type")),
+		Owner:     ctx.Package.Owner,
+		Creator:   ctx.Doer,
+		Image:     ctx.Params("image"),
+		Reference: reference,
+		IsTagged:  !oci.Digest(reference).Validate(),
+	}
+
+	if mci.IsTagged && !oci.Reference(reference).Validate() {
+		apiErrorDefined(ctx, errManifestInvalid.WithMessage("Tag is invalid"))
+		return
+	}
+
+	maxSize := maxManifestSize + 1
+	buf, err := packages_module.CreateHashedBufferFromReader(&io.LimitedReader{R: ctx.Req.Body, N: int64(maxSize)}, maxSize)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+	defer buf.Close()
+
+	if buf.Size() > maxManifestSize {
+		apiErrorDefined(ctx, errManifestInvalid.WithMessage("Manifest exceeds maximum size").WithStatusCode(http.StatusRequestEntityTooLarge))
+		return
+	}
+
+	digest, err := processManifest(mci, buf)
+	if err != nil {
+		var namedError *namedError
+		if errors.As(err, &namedError) {
+			apiErrorDefined(ctx, namedError)
+		} else if errors.Is(err, container_model.ErrContainerBlobNotExist) {
+			apiErrorDefined(ctx, errBlobUnknown)
+		} else {
+			apiError(ctx, http.StatusInternalServerError, err)
+		}
+		return
+	}
+
+	setResponseHeaders(ctx.Resp, &containerHeaders{
+		Location:      fmt.Sprintf("/v2/%s/%s/manifests/%s", ctx.Package.Owner.LowerName, mci.Image, reference),
+		ContentDigest: digest,
+		Status:        http.StatusCreated,
+	})
+}
+
+func getManifestFromContext(ctx *context.Context) (*packages_model.PackageFileDescriptor, error) {
+	reference := ctx.Params("reference")
+
+	opts := &container_model.BlobSearchOptions{
+		OwnerID:    ctx.Package.Owner.ID,
+		Image:      ctx.Params("image"),
+		IsManifest: true,
+	}
+	if oci.Digest(reference).Validate() {
+		opts.Digest = reference
+	} else if oci.Reference(reference).Validate() {
+		opts.Tag = reference
+	} else {
+		return nil, container_model.ErrContainerBlobNotExist
+	}
+
+	return container_model.GetContainerBlob(ctx, opts)
+}
+
+// https://github.com/opencontainers/distribution-spec/blob/main/spec.md#checking-if-content-exists-in-the-registry
+func HeadManifest(ctx *context.Context) {
+	manifest, err := getManifestFromContext(ctx)
+	if err != nil {
+		if err == container_model.ErrContainerBlobNotExist {
+			apiErrorDefined(ctx, errManifestUnknown)
+		} else {
+			apiError(ctx, http.StatusInternalServerError, err)
+		}
+		return
+	}
+
+	setResponseHeaders(ctx.Resp, &containerHeaders{
+		ContentDigest: manifest.Properties.GetByName(container_module.PropertyDigest),
+		ContentType:   manifest.Properties.GetByName(container_module.PropertyMediaType),
+		ContentLength: manifest.Blob.Size,
+		Status:        http.StatusOK,
+	})
+}
+
+// https://github.com/opencontainers/distribution-spec/blob/main/spec.md#pulling-manifests
+func GetManifest(ctx *context.Context) {
+	manifest, err := getManifestFromContext(ctx)
+	if err != nil {
+		if err == container_model.ErrContainerBlobNotExist {
+			apiErrorDefined(ctx, errManifestUnknown)
+		} else {
+			apiError(ctx, http.StatusInternalServerError, err)
+		}
+		return
+	}
+
+	s, err := packages_module.NewContentStore().Get(packages_module.BlobHash256Key(manifest.Blob.HashSHA256))
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+	defer s.Close()
+
+	setResponseHeaders(ctx.Resp, &containerHeaders{
+		ContentDigest: manifest.Properties.GetByName(container_module.PropertyDigest),
+		ContentType:   manifest.Properties.GetByName(container_module.PropertyMediaType),
+		ContentLength: manifest.Blob.Size,
+		Status:        http.StatusOK,
+	})
+	if _, err := io.Copy(ctx.Resp, s); err != nil {
+		log.Error("Error whilst copying content to response: %v", err)
+	}
+}
+
+// https://github.com/opencontainers/distribution-spec/blob/main/spec.md#deleting-tags
+// https://github.com/opencontainers/distribution-spec/blob/main/spec.md#deleting-manifests
+func DeleteManifest(ctx *context.Context) {
+	reference := ctx.Params("reference")
+
+	opts := &container_model.BlobSearchOptions{
+		OwnerID:    ctx.Package.Owner.ID,
+		Image:      ctx.Params("image"),
+		IsManifest: true,
+	}
+	if oci.Digest(reference).Validate() {
+		opts.Digest = reference
+	} else if oci.Reference(reference).Validate() {
+		opts.Tag = reference
+	} else {
+		apiErrorDefined(ctx, errManifestUnknown)
+		return
+	}
+
+	pvs, err := container_model.GetManifestVersions(ctx, opts)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	if len(pvs) == 0 {
+		apiErrorDefined(ctx, errManifestUnknown)
+		return
+	}
+
+	for _, pv := range pvs {
+		if err := packages_service.RemovePackageVersion(ctx.Doer, pv); err != nil {
+			apiError(ctx, http.StatusInternalServerError, err)
+			return
+		}
+	}
+
+	setResponseHeaders(ctx.Resp, &containerHeaders{
+		Status: http.StatusAccepted,
+	})
+}
+
+// https://github.com/opencontainers/distribution-spec/blob/main/spec.md#content-discovery
+func GetTagList(ctx *context.Context) {
+	image := ctx.Params("image")
+
+	if _, err := packages_model.GetPackageByName(ctx, ctx.Package.Owner.ID, packages_model.TypeContainer, image); err != nil {
+		if err == packages_model.ErrPackageNotExist {
+			apiErrorDefined(ctx, errNameUnknown)
+		} else {
+			apiError(ctx, http.StatusInternalServerError, err)
+		}
+		return
+	}
+
+	n := -1
+	if ctx.FormTrim("n") != "" {
+		n = ctx.FormInt("n")
+	}
+	last := ctx.FormTrim("last")
+
+	tags, err := container_model.GetImageTags(ctx, ctx.Package.Owner.ID, image, n, last)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	type TagList struct {
+		Name string   `json:"name"`
+		Tags []string `json:"tags"`
+	}
+
+	if len(tags) > 0 {
+		v := url.Values{}
+		if n > 0 {
+			v.Add("n", strconv.Itoa(n))
+		}
+		v.Add("last", tags[len(tags)-1])
+
+		ctx.Resp.Header().Set("Link", fmt.Sprintf(`</v2/%s/%s/tags/list?%s>; rel="next"`, ctx.Package.Owner.LowerName, image, v.Encode()))
+	}
+
+	jsonResponse(ctx, http.StatusOK, TagList{
+		Name: strings.ToLower(ctx.Package.Owner.LowerName + "/" + image),
+		Tags: tags,
+	})
+}

routers/api/packages/container/errors.go

@@ -0,0 +1,53 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package container
+
+import (
+	"net/http"
+)
+
+// https://github.com/opencontainers/distribution-spec/blob/main/spec.md#error-codes
+var (
+	errBlobUnknown         = &namedError{Code: "BLOB_UNKNOWN", StatusCode: http.StatusNotFound}
+	errBlobUploadInvalid   = &namedError{Code: "BLOB_UPLOAD_INVALID", StatusCode: http.StatusBadRequest}
+	errBlobUploadUnknown   = &namedError{Code: "BLOB_UPLOAD_UNKNOWN", StatusCode: http.StatusNotFound}
+	errDigestInvalid       = &namedError{Code: "DIGEST_INVALID", StatusCode: http.StatusBadRequest}
+	errManifestBlobUnknown = &namedError{Code: "MANIFEST_BLOB_UNKNOWN", StatusCode: http.StatusNotFound}
+	errManifestInvalid     = &namedError{Code: "MANIFEST_INVALID", StatusCode: http.StatusBadRequest}
+	errManifestUnknown     = &namedError{Code: "MANIFEST_UNKNOWN", StatusCode: http.StatusNotFound}
+	errNameInvalid         = &namedError{Code: "NAME_INVALID", StatusCode: http.StatusBadRequest}
+	errNameUnknown         = &namedError{Code: "NAME_UNKNOWN", StatusCode: http.StatusNotFound}
+	errSizeInvalid         = &namedError{Code: "SIZE_INVALID", StatusCode: http.StatusBadRequest}
+	errUnauthorized        = &namedError{Code: "UNAUTHORIZED", StatusCode: http.StatusUnauthorized}
+	errUnsupported         = &namedError{Code: "UNSUPPORTED", StatusCode: http.StatusNotImplemented}
+)
+
+type namedError struct {
+	Code       string
+	StatusCode int
+	Message    string
+}
+
+func (e *namedError) Error() string {
+	return e.Message
+}
+
+// WithMessage creates a new instance of the error with a different message
+func (e *namedError) WithMessage(message string) *namedError {
+	return &namedError{
+		Code:       e.Code,
+		StatusCode: e.StatusCode,
+		Message:    message,
+	}
+}
+
+// WithStatusCode creates a new instance of the error with a different status code
+func (e *namedError) WithStatusCode(statusCode int) *namedError {
+	return &namedError{
+		Code:       e.Code,
+		StatusCode: statusCode,
+		Message:    e.Message,
+	}
+}

routers/api/packages/container/manifest.go

@@ -0,0 +1,408 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package container
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"strings"
+
+	"code.gitea.io/gitea/models/db"
+	packages_model "code.gitea.io/gitea/models/packages"
+	container_model "code.gitea.io/gitea/models/packages/container"
+	user_model "code.gitea.io/gitea/models/user"
+	"code.gitea.io/gitea/modules/json"
+	"code.gitea.io/gitea/modules/log"
+	packages_module "code.gitea.io/gitea/modules/packages"
+	container_module "code.gitea.io/gitea/modules/packages/container"
+	"code.gitea.io/gitea/modules/packages/container/oci"
+	packages_service "code.gitea.io/gitea/services/packages"
+)
+
+// manifestCreationInfo describes a manifest to create
+type manifestCreationInfo struct {
+	MediaType  oci.MediaType
+	Owner      *user_model.User
+	Creator    *user_model.User
+	Image      string
+	Reference  string
+	IsTagged   bool
+	Properties map[string]string
+}
+
+func processManifest(mci *manifestCreationInfo, buf *packages_module.HashedBuffer) (string, error) {
+	var schema oci.SchemaMediaBase
+	if err := json.NewDecoder(buf).Decode(&schema); err != nil {
+		return "", err
+	}
+
+	if schema.SchemaVersion != 2 {
+		return "", errUnsupported.WithMessage("Schema version is not supported")
+	}
+
+	if _, err := buf.Seek(0, io.SeekStart); err != nil {
+		return "", err
+	}
+
+	if !mci.MediaType.IsValid() {
+		mci.MediaType = schema.MediaType
+		if !mci.MediaType.IsValid() {
+			return "", errManifestInvalid.WithMessage("MediaType not recognized")
+		}
+	}
+
+	if mci.MediaType.IsImageManifest() {
+		d, err := processImageManifest(mci, buf)
+		return d, err
+	} else if mci.MediaType.IsImageIndex() {
+		d, err := processImageManifestIndex(mci, buf)
+		return d, err
+	}
+	return "", errManifestInvalid
+}
+
+func processImageManifest(mci *manifestCreationInfo, buf *packages_module.HashedBuffer) (string, error) {
+	manifestDigest := ""
+
+	err := func() error {
+		var manifest oci.Manifest
+		if err := json.NewDecoder(buf).Decode(&manifest); err != nil {
+			return err
+		}
+
+		if _, err := buf.Seek(0, io.SeekStart); err != nil {
+			return err
+		}
+
+		ctx, committer, err := db.TxContext()
+		if err != nil {
+			return err
+		}
+		defer committer.Close()
+
+		configDescriptor, err := container_model.GetContainerBlob(ctx, &container_model.BlobSearchOptions{
+			OwnerID: mci.Owner.ID,
+			Image:   mci.Image,
+			Digest:  string(manifest.Config.Digest),
+		})
+		if err != nil {
+			return err
+		}
+
+		configReader, err := packages_module.NewContentStore().Get(packages_module.BlobHash256Key(configDescriptor.Blob.HashSHA256))
+		if err != nil {
+			return err
+		}
+		defer configReader.Close()
+
+		metadata, err := container_module.ParseImageConfig(manifest.Config.MediaType, configReader)
+		if err != nil {
+			return err
+		}
+
+		blobReferences := make([]*blobReference, 0, 1+len(manifest.Layers))
+
+		blobReferences = append(blobReferences, &blobReference{
+			Digest:       manifest.Config.Digest,
+			MediaType:    manifest.Config.MediaType,
+			File:         configDescriptor,
+			ExpectedSize: manifest.Config.Size,
+		})
+
+		for _, layer := range manifest.Layers {
+			pfd, err := container_model.GetContainerBlob(ctx, &container_model.BlobSearchOptions{
+				OwnerID: mci.Owner.ID,
+				Image:   mci.Image,
+				Digest:  string(layer.Digest),
+			})
+			if err != nil {
+				return err
+			}
+
+			blobReferences = append(blobReferences, &blobReference{
+				Digest:       layer.Digest,
+				MediaType:    layer.MediaType,
+				File:         pfd,
+				ExpectedSize: layer.Size,
+			})
+		}
+
+		pv, err := createPackageAndVersion(ctx, mci, metadata)
+		if err != nil {
+			return err
+		}
+
+		uploadVersion, err := packages_model.GetInternalVersionByNameAndVersion(ctx, mci.Owner.ID, packages_model.TypeContainer, mci.Image, container_model.UploadVersion)
+		if err != nil && err != packages_model.ErrPackageNotExist {
+			return err
+		}
+
+		for _, ref := range blobReferences {
+			if err := createFileFromBlobReference(ctx, pv, uploadVersion, ref); err != nil {
+				return err
+			}
+		}
+
+		pb, created, digest, err := createManifestBlob(ctx, mci, pv, buf)
+		removeBlob := false
+		defer func() {
+			if removeBlob {
+				contentStore := packages_module.NewContentStore()
+				if err := contentStore.Delete(packages_module.BlobHash256Key(pb.HashSHA256)); err != nil {
+					log.Error("Error deleting package blob from content store: %v", err)
+				}
+			}
+		}()
+		if err != nil {
+			removeBlob = created
+			return err
+		}
+
+		if err := committer.Commit(); err != nil {
+			removeBlob = created
+			return err
+		}
+
+		manifestDigest = digest
+
+		return nil
+	}()
+	if err != nil {
+		return "", err
+	}
+
+	return manifestDigest, nil
+}
+
+func processImageManifestIndex(mci *manifestCreationInfo, buf *packages_module.HashedBuffer) (string, error) {
+	manifestDigest := ""
+
+	err := func() error {
+		var index oci.Index
+		if err := json.NewDecoder(buf).Decode(&index); err != nil {
+			return err
+		}
+
+		if _, err := buf.Seek(0, io.SeekStart); err != nil {
+			return err
+		}
+
+		ctx, committer, err := db.TxContext()
+		if err != nil {
+			return err
+		}
+		defer committer.Close()
+
+		metadata := &container_module.Metadata{
+			Type:      container_module.TypeOCI,
+			MultiArch: make(map[string]string),
+		}
+
+		for _, manifest := range index.Manifests {
+			if !manifest.MediaType.IsImageManifest() {
+				return errManifestInvalid
+			}
+
+			platform := container_module.DefaultPlatform
+			if manifest.Platform != nil {
+				platform = fmt.Sprintf("%s/%s", manifest.Platform.OS, manifest.Platform.Architecture)
+				if manifest.Platform.Variant != "" {
+					platform = fmt.Sprintf("%s/%s", platform, manifest.Platform.Variant)
+				}
+			}
+
+			_, err := container_model.GetContainerBlob(ctx, &container_model.BlobSearchOptions{
+				OwnerID:    mci.Owner.ID,
+				Image:      mci.Image,
+				Digest:     string(manifest.Digest),
+				IsManifest: true,
+			})
+			if err != nil {
+				if err == container_model.ErrContainerBlobNotExist {
+					return errManifestBlobUnknown
+				}
+				return err
+			}
+
+			metadata.MultiArch[platform] = string(manifest.Digest)
+		}
+
+		pv, err := createPackageAndVersion(ctx, mci, metadata)
+		if err != nil {
+			return err
+		}
+
+		pb, created, digest, err := createManifestBlob(ctx, mci, pv, buf)
+		removeBlob := false
+		defer func() {
+			if removeBlob {
+				contentStore := packages_module.NewContentStore()
+				if err := contentStore.Delete(packages_module.BlobHash256Key(pb.HashSHA256)); err != nil {
+					log.Error("Error deleting package blob from content store: %v", err)
+				}
+			}
+		}()
+		if err != nil {
+			removeBlob = created
+			return err
+		}
+
+		if err := committer.Commit(); err != nil {
+			removeBlob = created
+			return err
+		}
+
+		manifestDigest = digest
+
+		return nil
+	}()
+	if err != nil {
+		return "", err
+	}
+
+	return manifestDigest, nil
+}
+
+func createPackageAndVersion(ctx context.Context, mci *manifestCreationInfo, metadata *container_module.Metadata) (*packages_model.PackageVersion, error) {
+	p := &packages_model.Package{
+		OwnerID:   mci.Owner.ID,
+		Type:      packages_model.TypeContainer,
+		Name:      strings.ToLower(mci.Image),
+		LowerName: strings.ToLower(mci.Image),
+	}
+	var err error
+	if p, err = packages_model.TryInsertPackage(ctx, p); err != nil {
+		if err != packages_model.ErrDuplicatePackage {
+			log.Error("Error inserting package: %v", err)
+			return nil, err
+		}
+	}
+
+	metadata.IsTagged = mci.IsTagged
+
+	metadataJSON, err := json.Marshal(metadata)
+	if err != nil {
+		return nil, err
+	}
+
+	_pv := &packages_model.PackageVersion{
+		PackageID:    p.ID,
+		CreatorID:    mci.Creator.ID,
+		Version:      strings.ToLower(mci.Reference),
+		LowerVersion: strings.ToLower(mci.Reference),
+		MetadataJSON: string(metadataJSON),
+	}
+	var pv *packages_model.PackageVersion
+	if pv, err = packages_model.GetOrInsertVersion(ctx, _pv); err != nil {
+		if err == packages_model.ErrDuplicatePackageVersion {
+			if err := packages_service.DeletePackageVersionAndReferences(ctx, pv); err != nil {
+				return nil, err
+			}
+
+			if pv, err = packages_model.GetOrInsertVersion(ctx, _pv); err != nil {
+				log.Error("Error inserting package: %v", err)
+				return nil, err
+			}
+		} else {
+			log.Error("Error inserting package: %v", err)
+			return nil, err
+		}
+	}
+
+	if mci.IsTagged {
+		if _, err := packages_model.InsertProperty(ctx, packages_model.PropertyTypeVersion, pv.ID, container_module.PropertyManifestTagged, ""); err != nil {
+			log.Error("Error setting package version property: %v", err)
+			return nil, err
+		}
+	}
+	for _, digest := range metadata.MultiArch {
+		if _, err := packages_model.InsertProperty(ctx, packages_model.PropertyTypeVersion, pv.ID, container_module.PropertyManifestReference, digest); err != nil {
+			log.Error("Error setting package version property: %v", err)
+			return nil, err
+		}
+	}
+
+	return pv, nil
+}
+
+type blobReference struct {
+	Digest       oci.Digest
+	MediaType    oci.MediaType
+	Name         string
+	File         *packages_model.PackageFileDescriptor
+	ExpectedSize int64
+	IsLead       bool
+}
+
+func createFileFromBlobReference(ctx context.Context, pv, uploadVersion *packages_model.PackageVersion, ref *blobReference) error {
+	if ref.File.Blob.Size != ref.ExpectedSize {
+		return errSizeInvalid
+	}
+
+	if ref.Name == "" {
+		ref.Name = strings.ToLower(fmt.Sprintf("sha256_%s", ref.File.Blob.HashSHA256))
+	}
+
+	pf := &packages_model.PackageFile{
+		VersionID: pv.ID,
+		BlobID:    ref.File.Blob.ID,
+		Name:      ref.Name,
+		LowerName: ref.Name,
+		IsLead:    ref.IsLead,
+	}
+	var err error
+	if pf, err = packages_model.TryInsertFile(ctx, pf); err != nil {
+		log.Error("Error inserting package file: %v", err)
+		return err
+	}
+
+	props := map[string]string{
+		container_module.PropertyMediaType: string(ref.MediaType),
+		container_module.PropertyDigest:    string(ref.Digest),
+	}
+	for name, value := range props {
+		if _, err := packages_model.InsertProperty(ctx, packages_model.PropertyTypeFile, pf.ID, name, value); err != nil {
+			log.Error("Error setting package file property: %v", err)
+			return err
+		}
+	}
+
+	// Remove the file from the blob upload version
+	if uploadVersion != nil && ref.File.File != nil && uploadVersion.ID == ref.File.File.VersionID {
+		if err := packages_service.DeletePackageFile(ctx, ref.File.File); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func createManifestBlob(ctx context.Context, mci *manifestCreationInfo, pv *packages_model.PackageVersion, buf *packages_module.HashedBuffer) (*packages_model.PackageBlob, bool, string, error) {
+	pb, exists, err := packages_model.GetOrInsertBlob(ctx, packages_service.NewPackageBlob(buf))
+	if err != nil {
+		log.Error("Error inserting package blob: %v", err)
+		return nil, false, "", err
+	}
+	if !exists {
+		contentStore := packages_module.NewContentStore()
+		if err := contentStore.Save(packages_module.BlobHash256Key(pb.HashSHA256), buf, buf.Size()); err != nil {
+			log.Error("Error saving package blob in content store: %v", err)
+			return nil, false, "", err
+		}
+	}
+
+	manifestDigest := digestFromHashSummer(buf)
+	err = createFileFromBlobReference(ctx, pv, nil, &blobReference{
+		Digest:       oci.Digest(manifestDigest),
+		MediaType:    mci.MediaType,
+		Name:         container_model.ManifestFilename,
+		File:         &packages_model.PackageFileDescriptor{Blob: pb},
+		ExpectedSize: pb.Size,
+		IsLead:       true,
+	})
+
+	return pb, !exists, manifestDigest, err
+}

routers/api/packages/generic/generic.go

@@ -0,0 +1,166 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package generic
+
+import (
+	"errors"
+	"net/http"
+	"regexp"
+
+	packages_model "code.gitea.io/gitea/models/packages"
+	"code.gitea.io/gitea/modules/context"
+	"code.gitea.io/gitea/modules/log"
+	packages_module "code.gitea.io/gitea/modules/packages"
+	"code.gitea.io/gitea/routers/api/packages/helper"
+	packages_service "code.gitea.io/gitea/services/packages"
+
+	"github.com/hashicorp/go-version"
+)
+
+var (
+	packageNameRegex = regexp.MustCompile(`\A[A-Za-z0-9\.\_\-\+]+\z`)
+	filenameRegex    = packageNameRegex
+)
+
+func apiError(ctx *context.Context, status int, obj interface{}) {
+	helper.LogAndProcessError(ctx, status, obj, func(message string) {
+		ctx.PlainText(status, message)
+	})
+}
+
+// DownloadPackageFile serves the specific generic package.
+func DownloadPackageFile(ctx *context.Context) {
+	packageName, packageVersion, filename, err := sanitizeParameters(ctx)
+	if err != nil {
+		apiError(ctx, http.StatusBadRequest, err)
+		return
+	}
+
+	s, pf, err := packages_service.GetFileStreamByPackageNameAndVersion(
+		ctx,
+		&packages_service.PackageInfo{
+			Owner:       ctx.Package.Owner,
+			PackageType: packages_model.TypeGeneric,
+			Name:        packageName,
+			Version:     packageVersion,
+		},
+		&packages_service.PackageFileInfo{
+			Filename: filename,
+		},
+	)
+	if err != nil {
+		if err == packages_model.ErrPackageNotExist || err == packages_model.ErrPackageFileNotExist {
+			apiError(ctx, http.StatusNotFound, err)
+			return
+		}
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+	defer s.Close()
+
+	ctx.ServeStream(s, pf.Name)
+}
+
+// UploadPackage uploads the specific generic package.
+// Duplicated packages get rejected.
+func UploadPackage(ctx *context.Context) {
+	packageName, packageVersion, filename, err := sanitizeParameters(ctx)
+	if err != nil {
+		apiError(ctx, http.StatusBadRequest, err)
+		return
+	}
+
+	upload, close, err := ctx.UploadStream()
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+	if close {
+		defer upload.Close()
+	}
+
+	buf, err := packages_module.CreateHashedBufferFromReader(upload, 32*1024*1024)
+	if err != nil {
+		log.Error("Error creating hashed buffer: %v", err)
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+	defer buf.Close()
+
+	_, _, err = packages_service.CreatePackageAndAddFile(
+		&packages_service.PackageCreationInfo{
+			PackageInfo: packages_service.PackageInfo{
+				Owner:       ctx.Package.Owner,
+				PackageType: packages_model.TypeGeneric,
+				Name:        packageName,
+				Version:     packageVersion,
+			},
+			SemverCompatible: true,
+			Creator:          ctx.Doer,
+		},
+		&packages_service.PackageFileCreationInfo{
+			PackageFileInfo: packages_service.PackageFileInfo{
+				Filename: filename,
+			},
+			Data:   buf,
+			IsLead: true,
+		},
+	)
+	if err != nil {
+		if err == packages_model.ErrDuplicatePackageVersion {
+			apiError(ctx, http.StatusBadRequest, err)
+			return
+		}
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	ctx.Status(http.StatusCreated)
+}
+
+// DeletePackage deletes the specific generic package.
+func DeletePackage(ctx *context.Context) {
+	packageName, packageVersion, _, err := sanitizeParameters(ctx)
+	if err != nil {
+		apiError(ctx, http.StatusBadRequest, err)
+		return
+	}
+
+	err = packages_service.RemovePackageVersionByNameAndVersion(
+		ctx.Doer,
+		&packages_service.PackageInfo{
+			Owner:       ctx.Package.Owner,
+			PackageType: packages_model.TypeGeneric,
+			Name:        packageName,
+			Version:     packageVersion,
+		},
+	)
+	if err != nil {
+		if err == packages_model.ErrPackageNotExist {
+			apiError(ctx, http.StatusNotFound, err)
+			return
+		}
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	ctx.Status(http.StatusOK)
+}
+
+func sanitizeParameters(ctx *context.Context) (string, string, string, error) {
+	packageName := ctx.Params("packagename")
+	filename := ctx.Params("filename")
+
+	if !packageNameRegex.MatchString(packageName) || !filenameRegex.MatchString(filename) {
+		return "", "", "", errors.New("Invalid package name or filename")
+	}
+
+	v, err := version.NewSemver(ctx.Params("packageversion"))
+	if err != nil {
+		return "", "", "", err
+	}
+
+	return packageName, v.String(), filename, nil
+}

routers/api/packages/helper/helper.go

@@ -0,0 +1,38 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package helper
+
+import (
+	"fmt"
+	"net/http"
+
+	"code.gitea.io/gitea/modules/context"
+	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/setting"
+)
+
+// LogAndProcessError logs an error and calls a custom callback with the processed error message.
+// If the error is an InternalServerError the message is stripped if the user is not an admin.
+func LogAndProcessError(ctx *context.Context, status int, obj interface{}, cb func(string)) {
+	var message string
+	if err, ok := obj.(error); ok {
+		message = err.Error()
+	} else if obj != nil {
+		message = fmt.Sprintf("%s", obj)
+	}
+	if status == http.StatusInternalServerError {
+		log.ErrorWithSkip(1, message)
+
+		if setting.IsProd && (ctx.Doer == nil || !ctx.Doer.IsAdmin) {
+			message = ""
+		}
+	} else {
+		log.Debug(message)
+	}
+
+	if cb != nil {
+		cb(message)
+	}
+}

routers/api/packages/maven/api.go

@@ -0,0 +1,56 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package maven
+
+import (
+	"encoding/xml"
+	"sort"
+	"strings"
+
+	packages_model "code.gitea.io/gitea/models/packages"
+	maven_module "code.gitea.io/gitea/modules/packages/maven"
+)
+
+// MetadataResponse https://maven.apache.org/ref/3.2.5/maven-repository-metadata/repository-metadata.html
+type MetadataResponse struct {
+	XMLName    xml.Name `xml:"metadata"`
+	GroupID    string   `xml:"groupId"`
+	ArtifactID string   `xml:"artifactId"`
+	Release    string   `xml:"versioning>release,omitempty"`
+	Latest     string   `xml:"versioning>latest"`
+	Version    []string `xml:"versioning>versions>version"`
+}
+
+func createMetadataResponse(pds []*packages_model.PackageDescriptor) *MetadataResponse {
+	sort.Slice(pds, func(i, j int) bool {
+		// Maven and Gradle order packages by their creation timestamp and not by their version string
+		return pds[i].Version.CreatedUnix < pds[j].Version.CreatedUnix
+	})
+
+	var release *packages_model.PackageDescriptor
+
+	versions := make([]string, 0, len(pds))
+	for _, pd := range pds {
+		if !strings.HasSuffix(pd.Version.Version, "-SNAPSHOT") {
+			release = pd
+		}
+		versions = append(versions, pd.Version.Version)
+	}
+
+	latest := pds[len(pds)-1]
+
+	metadata := latest.Metadata.(*maven_module.Metadata)
+
+	resp := &MetadataResponse{
+		GroupID:    metadata.GroupID,
+		ArtifactID: metadata.ArtifactID,
+		Latest:     latest.Version.Version,
+		Version:    versions,
+	}
+	if release != nil {
+		resp.Release = release.Version.Version
+	}
+	return resp
+}

routers/api/packages/maven/maven.go

@@ -0,0 +1,378 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package maven
+
+import (
+	"crypto/md5"
+	"crypto/sha1"
+	"crypto/sha256"
+	"crypto/sha512"
+	"encoding/xml"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"path/filepath"
+	"regexp"
+	"strings"
+
+	packages_model "code.gitea.io/gitea/models/packages"
+	"code.gitea.io/gitea/modules/context"
+	"code.gitea.io/gitea/modules/json"
+	"code.gitea.io/gitea/modules/log"
+	packages_module "code.gitea.io/gitea/modules/packages"
+	maven_module "code.gitea.io/gitea/modules/packages/maven"
+	"code.gitea.io/gitea/routers/api/packages/helper"
+	packages_service "code.gitea.io/gitea/services/packages"
+)
+
+const (
+	mavenMetadataFile = "maven-metadata.xml"
+	extensionMD5      = ".md5"
+	extensionSHA1     = ".sha1"
+	extensionSHA256   = ".sha256"
+	extensionSHA512   = ".sha512"
+)
+
+var (
+	errInvalidParameters = errors.New("request parameters are invalid")
+	illegalCharacters    = regexp.MustCompile(`[\\/:"<>|?\*]`)
+)
+
+func apiError(ctx *context.Context, status int, obj interface{}) {
+	helper.LogAndProcessError(ctx, status, obj, func(message string) {
+		ctx.PlainText(status, message)
+	})
+}
+
+// DownloadPackageFile serves the content of a package
+func DownloadPackageFile(ctx *context.Context) {
+	params, err := extractPathParameters(ctx)
+	if err != nil {
+		apiError(ctx, http.StatusBadRequest, err)
+		return
+	}
+
+	if params.IsMeta && params.Version == "" {
+		serveMavenMetadata(ctx, params)
+	} else {
+		servePackageFile(ctx, params)
+	}
+}
+
+func serveMavenMetadata(ctx *context.Context, params parameters) {
+	// /com/foo/project/maven-metadata.xml[.md5/.sha1/.sha256/.sha512]
+
+	packageName := params.GroupID + "-" + params.ArtifactID
+	pvs, err := packages_model.GetVersionsByPackageName(ctx, ctx.Package.Owner.ID, packages_model.TypeMaven, packageName)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+	if len(pvs) == 0 {
+		apiError(ctx, http.StatusNotFound, packages_model.ErrPackageNotExist)
+		return
+	}
+
+	pds, err := packages_model.GetPackageDescriptors(ctx, pvs)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	xmlMetadata, err := xml.Marshal(createMetadataResponse(pds))
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+	xmlMetadataWithHeader := append([]byte(xml.Header), xmlMetadata...)
+
+	ext := strings.ToLower(filepath.Ext(params.Filename))
+	if isChecksumExtension(ext) {
+		var hash []byte
+		switch ext {
+		case extensionMD5:
+			tmp := md5.Sum(xmlMetadataWithHeader)
+			hash = tmp[:]
+		case extensionSHA1:
+			tmp := sha1.Sum(xmlMetadataWithHeader)
+			hash = tmp[:]
+		case extensionSHA256:
+			tmp := sha256.Sum256(xmlMetadataWithHeader)
+			hash = tmp[:]
+		case extensionSHA512:
+			tmp := sha512.Sum512(xmlMetadataWithHeader)
+			hash = tmp[:]
+		}
+		ctx.PlainText(http.StatusOK, fmt.Sprintf("%x", hash))
+		return
+	}
+
+	ctx.PlainTextBytes(http.StatusOK, xmlMetadataWithHeader)
+}
+
+func servePackageFile(ctx *context.Context, params parameters) {
+	packageName := params.GroupID + "-" + params.ArtifactID
+
+	pv, err := packages_model.GetVersionByNameAndVersion(ctx, ctx.Package.Owner.ID, packages_model.TypeMaven, packageName, params.Version)
+	if err != nil {
+		if err == packages_model.ErrPackageNotExist {
+			apiError(ctx, http.StatusNotFound, err)
+		} else {
+			apiError(ctx, http.StatusInternalServerError, err)
+		}
+		return
+	}
+
+	filename := params.Filename
+
+	ext := strings.ToLower(filepath.Ext(filename))
+	if isChecksumExtension(ext) {
+		filename = filename[:len(filename)-len(ext)]
+	}
+
+	pf, err := packages_model.GetFileForVersionByName(ctx, pv.ID, filename, packages_model.EmptyFileKey)
+	if err != nil {
+		if err == packages_model.ErrPackageFileNotExist {
+			apiError(ctx, http.StatusNotFound, err)
+		} else {
+			apiError(ctx, http.StatusInternalServerError, err)
+		}
+		return
+	}
+
+	pb, err := packages_model.GetBlobByID(ctx, pf.BlobID)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	if isChecksumExtension(ext) {
+		var hash string
+		switch ext {
+		case extensionMD5:
+			hash = pb.HashMD5
+		case extensionSHA1:
+			hash = pb.HashSHA1
+		case extensionSHA256:
+			hash = pb.HashSHA256
+		case extensionSHA512:
+			hash = pb.HashSHA512
+		}
+		ctx.PlainText(http.StatusOK, hash)
+		return
+	}
+
+	s, err := packages_module.NewContentStore().Get(packages_module.BlobHash256Key(pb.HashSHA256))
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+	}
+	defer s.Close()
+
+	if pf.IsLead {
+		if err := packages_model.IncrementDownloadCounter(ctx, pv.ID); err != nil {
+			log.Error("Error incrementing download counter: %v", err)
+		}
+	}
+
+	ctx.ServeStream(s, pf.Name)
+}
+
+// UploadPackageFile adds a file to the package. If the package does not exist, it gets created.
+func UploadPackageFile(ctx *context.Context) {
+	params, err := extractPathParameters(ctx)
+	if err != nil {
+		apiError(ctx, http.StatusBadRequest, err)
+		return
+	}
+
+	log.Trace("Parameters: %+v", params)
+
+	// Ignore the package index /<name>/maven-metadata.xml
+	if params.IsMeta && params.Version == "" {
+		ctx.Status(http.StatusOK)
+		return
+	}
+
+	packageName := params.GroupID + "-" + params.ArtifactID
+
+	buf, err := packages_module.CreateHashedBufferFromReader(ctx.Req.Body, 32*1024*1024)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+	defer buf.Close()
+
+	pvci := &packages_service.PackageCreationInfo{
+		PackageInfo: packages_service.PackageInfo{
+			Owner:       ctx.Package.Owner,
+			PackageType: packages_model.TypeMaven,
+			Name:        packageName,
+			Version:     params.Version,
+		},
+		SemverCompatible: false,
+		Creator:          ctx.Doer,
+	}
+
+	ext := filepath.Ext(params.Filename)
+
+	// Do not upload checksum files but compare the hashes.
+	if isChecksumExtension(ext) {
+		pv, err := packages_model.GetVersionByNameAndVersion(ctx, pvci.Owner.ID, pvci.PackageType, pvci.Name, pvci.Version)
+		if err != nil {
+			if err == packages_model.ErrPackageNotExist {
+				apiError(ctx, http.StatusNotFound, err)
+				return
+			}
+			apiError(ctx, http.StatusInternalServerError, err)
+			return
+		}
+		pf, err := packages_model.GetFileForVersionByName(ctx, pv.ID, params.Filename[:len(params.Filename)-len(ext)], packages_model.EmptyFileKey)
+		if err != nil {
+			if err == packages_model.ErrPackageFileNotExist {
+				apiError(ctx, http.StatusNotFound, err)
+				return
+			}
+			apiError(ctx, http.StatusInternalServerError, err)
+			return
+		}
+		pb, err := packages_model.GetBlobByID(ctx, pf.BlobID)
+		if err != nil {
+			apiError(ctx, http.StatusInternalServerError, err)
+			return
+		}
+
+		hash, err := io.ReadAll(buf)
+		if err != nil {
+			apiError(ctx, http.StatusInternalServerError, err)
+			return
+		}
+
+		if (ext == extensionMD5 && pb.HashMD5 != string(hash)) ||
+			(ext == extensionSHA1 && pb.HashSHA1 != string(hash)) ||
+			(ext == extensionSHA256 && pb.HashSHA256 != string(hash)) ||
+			(ext == extensionSHA512 && pb.HashSHA512 != string(hash)) {
+			apiError(ctx, http.StatusBadRequest, "hash mismatch")
+			return
+		}
+
+		ctx.Status(http.StatusOK)
+		return
+	}
+
+	pfci := &packages_service.PackageFileCreationInfo{
+		PackageFileInfo: packages_service.PackageFileInfo{
+			Filename: params.Filename,
+		},
+		Data:   buf,
+		IsLead: false,
+	}
+
+	// If it's the package pom file extract the metadata
+	if ext == ".pom" {
+		pfci.IsLead = true
+
+		var err error
+		pvci.Metadata, err = maven_module.ParsePackageMetaData(buf)
+		if err != nil {
+			log.Error("Error parsing package metadata: %v", err)
+		}
+
+		if pvci.Metadata != nil {
+			pv, err := packages_model.GetVersionByNameAndVersion(ctx, pvci.Owner.ID, pvci.PackageType, pvci.Name, pvci.Version)
+			if err != nil && err != packages_model.ErrPackageNotExist {
+				apiError(ctx, http.StatusInternalServerError, err)
+				return
+			}
+			if pv != nil {
+				raw, err := json.Marshal(pvci.Metadata)
+				if err != nil {
+					apiError(ctx, http.StatusInternalServerError, err)
+					return
+				}
+				pv.MetadataJSON = string(raw)
+				if err := packages_model.UpdateVersion(ctx, pv); err != nil {
+					apiError(ctx, http.StatusInternalServerError, err)
+					return
+				}
+			}
+		}
+
+		if _, err := buf.Seek(0, io.SeekStart); err != nil {
+			apiError(ctx, http.StatusInternalServerError, err)
+			return
+		}
+	}
+
+	_, _, err = packages_service.CreatePackageOrAddFileToExisting(
+		pvci,
+		pfci,
+	)
+	if err != nil {
+		if err == packages_model.ErrDuplicatePackageFile {
+			apiError(ctx, http.StatusBadRequest, err)
+			return
+		}
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	ctx.Status(http.StatusCreated)
+}
+
+func isChecksumExtension(ext string) bool {
+	return ext == extensionMD5 || ext == extensionSHA1 || ext == extensionSHA256 || ext == extensionSHA512
+}
+
+type parameters struct {
+	GroupID    string
+	ArtifactID string
+	Version    string
+	Filename   string
+	IsMeta     bool
+}
+
+func extractPathParameters(ctx *context.Context) (parameters, error) {
+	parts := strings.Split(ctx.Params("*"), "/")
+
+	p := parameters{
+		Filename: parts[len(parts)-1],
+	}
+
+	p.IsMeta = p.Filename == mavenMetadataFile ||
+		p.Filename == mavenMetadataFile+extensionMD5 ||
+		p.Filename == mavenMetadataFile+extensionSHA1 ||
+		p.Filename == mavenMetadataFile+extensionSHA256 ||
+		p.Filename == mavenMetadataFile+extensionSHA512
+
+	parts = parts[:len(parts)-1]
+	if len(parts) == 0 {
+		return p, errInvalidParameters
+	}
+
+	p.Version = parts[len(parts)-1]
+	if p.IsMeta && !strings.HasSuffix(p.Version, "-SNAPSHOT") {
+		p.Version = ""
+	} else {
+		parts = parts[:len(parts)-1]
+	}
+
+	if illegalCharacters.MatchString(p.Version) {
+		return p, errInvalidParameters
+	}
+
+	if len(parts) < 2 {
+		return p, errInvalidParameters
+	}
+
+	p.ArtifactID = parts[len(parts)-1]
+	p.GroupID = strings.Join(parts[:len(parts)-1], ".")
+
+	if illegalCharacters.MatchString(p.GroupID) || illegalCharacters.MatchString(p.ArtifactID) {
+		return p, errInvalidParameters
+	}
+
+	return p, nil
+}

routers/api/packages/npm/api.go

@@ -0,0 +1,73 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package npm
+
+import (
+	"encoding/base64"
+	"encoding/hex"
+	"fmt"
+	"net/url"
+	"sort"
+
+	packages_model "code.gitea.io/gitea/models/packages"
+	npm_module "code.gitea.io/gitea/modules/packages/npm"
+)
+
+func createPackageMetadataResponse(registryURL string, pds []*packages_model.PackageDescriptor) *npm_module.PackageMetadata {
+	sort.Slice(pds, func(i, j int) bool {
+		return pds[i].SemVer.LessThan(pds[j].SemVer)
+	})
+
+	versions := make(map[string]*npm_module.PackageMetadataVersion)
+	distTags := make(map[string]string)
+	for _, pd := range pds {
+		versions[pd.SemVer.String()] = createPackageMetadataVersion(registryURL, pd)
+
+		for _, pvp := range pd.Properties {
+			if pvp.Name == npm_module.TagProperty {
+				distTags[pvp.Value] = pd.Version.Version
+			}
+		}
+	}
+
+	latest := pds[len(pds)-1]
+
+	metadata := latest.Metadata.(*npm_module.Metadata)
+
+	return &npm_module.PackageMetadata{
+		ID:          latest.Package.Name,
+		Name:        latest.Package.Name,
+		DistTags:    distTags,
+		Description: metadata.Description,
+		Readme:      metadata.Readme,
+		Homepage:    metadata.ProjectURL,
+		Author:      npm_module.User{Name: metadata.Author},
+		License:     metadata.License,
+		Versions:    versions,
+	}
+}
+
+func createPackageMetadataVersion(registryURL string, pd *packages_model.PackageDescriptor) *npm_module.PackageMetadataVersion {
+	hashBytes, _ := hex.DecodeString(pd.Files[0].Blob.HashSHA512)
+
+	metadata := pd.Metadata.(*npm_module.Metadata)
+
+	return &npm_module.PackageMetadataVersion{
+		ID:           fmt.Sprintf("%s@%s", pd.Package.Name, pd.Version.Version),
+		Name:         pd.Package.Name,
+		Version:      pd.Version.Version,
+		Description:  metadata.Description,
+		Author:       npm_module.User{Name: metadata.Author},
+		Homepage:     metadata.ProjectURL,
+		License:      metadata.License,
+		Dependencies: metadata.Dependencies,
+		Readme:       metadata.Readme,
+		Dist: npm_module.PackageDistribution{
+			Shasum:    pd.Files[0].Blob.HashSHA1,
+			Integrity: "sha512-" + base64.StdEncoding.EncodeToString(hashBytes),
+			Tarball:   fmt.Sprintf("%s/%s/-/%s/%s", registryURL, url.QueryEscape(pd.Package.Name), url.PathEscape(pd.Version.Version), url.PathEscape(pd.Files[0].File.LowerName)),
+		},
+	}
+}

routers/api/packages/npm/npm.go

@@ -0,0 +1,288 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package npm
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"strings"
+
+	"code.gitea.io/gitea/models/db"
+	packages_model "code.gitea.io/gitea/models/packages"
+	"code.gitea.io/gitea/modules/context"
+	packages_module "code.gitea.io/gitea/modules/packages"
+	npm_module "code.gitea.io/gitea/modules/packages/npm"
+	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/routers/api/packages/helper"
+	packages_service "code.gitea.io/gitea/services/packages"
+
+	"github.com/hashicorp/go-version"
+)
+
+// errInvalidTagName indicates an invalid tag name
+var errInvalidTagName = errors.New("The tag name is invalid")
+
+func apiError(ctx *context.Context, status int, obj interface{}) {
+	helper.LogAndProcessError(ctx, status, obj, func(message string) {
+		ctx.JSON(status, map[string]string{
+			"error": message,
+		})
+	})
+}
+
+// packageNameFromParams gets the package name from the url parameters
+// Variations: /name/, /@scope/name/, /@scope%2Fname/
+func packageNameFromParams(ctx *context.Context) string {
+	scope := ctx.Params("scope")
+	id := ctx.Params("id")
+	if scope != "" {
+		return fmt.Sprintf("@%s/%s", scope, id)
+	}
+	return id
+}
+
+// PackageMetadata returns the metadata for a single package
+func PackageMetadata(ctx *context.Context) {
+	packageName := packageNameFromParams(ctx)
+
+	pvs, err := packages_model.GetVersionsByPackageName(ctx, ctx.Package.Owner.ID, packages_model.TypeNpm, packageName)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+	if len(pvs) == 0 {
+		apiError(ctx, http.StatusNotFound, err)
+		return
+	}
+
+	pds, err := packages_model.GetPackageDescriptors(ctx, pvs)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	resp := createPackageMetadataResponse(
+		setting.AppURL+"api/packages/"+ctx.Package.Owner.Name+"/npm",
+		pds,
+	)
+
+	ctx.JSON(http.StatusOK, resp)
+}
+
+// DownloadPackageFile serves the content of a package
+func DownloadPackageFile(ctx *context.Context) {
+	packageName := packageNameFromParams(ctx)
+	packageVersion := ctx.Params("version")
+	filename := ctx.Params("filename")
+
+	s, pf, err := packages_service.GetFileStreamByPackageNameAndVersion(
+		ctx,
+		&packages_service.PackageInfo{
+			Owner:       ctx.Package.Owner,
+			PackageType: packages_model.TypeNpm,
+			Name:        packageName,
+			Version:     packageVersion,
+		},
+		&packages_service.PackageFileInfo{
+			Filename: filename,
+		},
+	)
+	if err != nil {
+		if err == packages_model.ErrPackageNotExist || err == packages_model.ErrPackageFileNotExist {
+			apiError(ctx, http.StatusNotFound, err)
+			return
+		}
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+	defer s.Close()
+
+	ctx.ServeStream(s, pf.Name)
+}
+
+// UploadPackage creates a new package
+func UploadPackage(ctx *context.Context) {
+	npmPackage, err := npm_module.ParsePackage(ctx.Req.Body)
+	if err != nil {
+		apiError(ctx, http.StatusBadRequest, err)
+		return
+	}
+
+	buf, err := packages_module.CreateHashedBufferFromReader(bytes.NewReader(npmPackage.Data), 32*1024*1024)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+	defer buf.Close()
+
+	pv, _, err := packages_service.CreatePackageAndAddFile(
+		&packages_service.PackageCreationInfo{
+			PackageInfo: packages_service.PackageInfo{
+				Owner:       ctx.Package.Owner,
+				PackageType: packages_model.TypeNpm,
+				Name:        npmPackage.Name,
+				Version:     npmPackage.Version,
+			},
+			SemverCompatible: true,
+			Creator:          ctx.Doer,
+			Metadata:         npmPackage.Metadata,
+		},
+		&packages_service.PackageFileCreationInfo{
+			PackageFileInfo: packages_service.PackageFileInfo{
+				Filename: npmPackage.Filename,
+			},
+			Data:   buf,
+			IsLead: true,
+		},
+	)
+	if err != nil {
+		if err == packages_model.ErrDuplicatePackageVersion {
+			apiError(ctx, http.StatusBadRequest, err)
+			return
+		}
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	for _, tag := range npmPackage.DistTags {
+		if err := setPackageTag(tag, pv, false); err != nil {
+			if err == errInvalidTagName {
+				apiError(ctx, http.StatusBadRequest, err)
+				return
+			}
+			apiError(ctx, http.StatusInternalServerError, err)
+			return
+		}
+	}
+
+	ctx.Status(http.StatusCreated)
+}
+
+// ListPackageTags returns all tags for a package
+func ListPackageTags(ctx *context.Context) {
+	packageName := packageNameFromParams(ctx)
+
+	pvs, err := packages_model.GetVersionsByPackageName(ctx, ctx.Package.Owner.ID, packages_model.TypeNpm, packageName)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	tags := make(map[string]string)
+	for _, pv := range pvs {
+		pvps, err := packages_model.GetPropertiesByName(ctx, packages_model.PropertyTypeVersion, pv.ID, npm_module.TagProperty)
+		if err != nil {
+			apiError(ctx, http.StatusInternalServerError, err)
+			return
+		}
+		for _, pvp := range pvps {
+			tags[pvp.Value] = pv.Version
+		}
+	}
+
+	ctx.JSON(http.StatusOK, tags)
+}
+
+// AddPackageTag adds a tag to the package
+func AddPackageTag(ctx *context.Context) {
+	packageName := packageNameFromParams(ctx)
+
+	body, err := io.ReadAll(ctx.Req.Body)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+	version := strings.Trim(string(body), "\"") // is as "version" in the body
+
+	pv, err := packages_model.GetVersionByNameAndVersion(ctx, ctx.Package.Owner.ID, packages_model.TypeNpm, packageName, version)
+	if err != nil {
+		if err == packages_model.ErrPackageNotExist {
+			apiError(ctx, http.StatusNotFound, err)
+			return
+		}
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	if err := setPackageTag(ctx.Params("tag"), pv, false); err != nil {
+		if err == errInvalidTagName {
+			apiError(ctx, http.StatusBadRequest, err)
+			return
+		}
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+}
+
+// DeletePackageTag deletes a package tag
+func DeletePackageTag(ctx *context.Context) {
+	packageName := packageNameFromParams(ctx)
+
+	pvs, err := packages_model.GetVersionsByPackageName(ctx, ctx.Package.Owner.ID, packages_model.TypeNpm, packageName)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	if len(pvs) != 0 {
+		if err := setPackageTag(ctx.Params("tag"), pvs[0], true); err != nil {
+			if err == errInvalidTagName {
+				apiError(ctx, http.StatusBadRequest, err)
+				return
+			}
+			apiError(ctx, http.StatusInternalServerError, err)
+			return
+		}
+	}
+}
+
+func setPackageTag(tag string, pv *packages_model.PackageVersion, deleteOnly bool) error {
+	if tag == "" {
+		return errInvalidTagName
+	}
+	_, err := version.NewVersion(tag)
+	if err == nil {
+		return errInvalidTagName
+	}
+
+	ctx, committer, err := db.TxContext()
+	if err != nil {
+		return err
+	}
+	defer committer.Close()
+
+	pvs, err := packages_model.FindVersionsByPropertyNameAndValue(ctx, pv.PackageID, npm_module.TagProperty, tag)
+	if err != nil {
+		return err
+	}
+
+	if len(pvs) == 1 {
+		pvps, err := packages_model.GetPropertiesByName(ctx, packages_model.PropertyTypeVersion, pvs[0].ID, npm_module.TagProperty)
+		if err != nil {
+			return err
+		}
+
+		for _, pvp := range pvps {
+			if pvp.Value == tag {
+				if err := packages_model.DeletePropertyByID(ctx, pvp.ID); err != nil {
+					return err
+				}
+				break
+			}
+		}
+	}
+
+	if !deleteOnly {
+		_, err = packages_model.InsertProperty(ctx, packages_model.PropertyTypeVersion, pv.ID, npm_module.TagProperty, tag)
+		if err != nil {
+			return err
+		}
+	}
+
+	return committer.Commit()
+}

routers/api/packages/nuget/api.go

@@ -0,0 +1,287 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package nuget
+
+import (
+	"bytes"
+	"fmt"
+	"sort"
+	"time"
+
+	packages_model "code.gitea.io/gitea/models/packages"
+	nuget_module "code.gitea.io/gitea/modules/packages/nuget"
+
+	"github.com/hashicorp/go-version"
+)
+
+// ServiceIndexResponse https://docs.microsoft.com/en-us/nuget/api/service-index#resources
+type ServiceIndexResponse struct {
+	Version   string            `json:"version"`
+	Resources []ServiceResource `json:"resources"`
+}
+
+// ServiceResource https://docs.microsoft.com/en-us/nuget/api/service-index#resource
+type ServiceResource struct {
+	ID   string `json:"@id"`
+	Type string `json:"@type"`
+}
+
+func createServiceIndexResponse(root string) *ServiceIndexResponse {
+	return &ServiceIndexResponse{
+		Version: "3.0.0",
+		Resources: []ServiceResource{
+			{ID: root + "/query", Type: "SearchQueryService"},
+			{ID: root + "/query", Type: "SearchQueryService/3.0.0-beta"},
+			{ID: root + "/query", Type: "SearchQueryService/3.0.0-rc"},
+			{ID: root + "/registration", Type: "RegistrationsBaseUrl"},
+			{ID: root + "/registration", Type: "RegistrationsBaseUrl/3.0.0-beta"},
+			{ID: root + "/registration", Type: "RegistrationsBaseUrl/3.0.0-rc"},
+			{ID: root + "/package", Type: "PackageBaseAddress/3.0.0"},
+			{ID: root, Type: "PackagePublish/2.0.0"},
+			{ID: root + "/symbolpackage", Type: "SymbolPackagePublish/4.9.0"},
+		},
+	}
+}
+
+// RegistrationIndexResponse https://docs.microsoft.com/en-us/nuget/api/registration-base-url-resource#response
+type RegistrationIndexResponse struct {
+	RegistrationIndexURL string                   `json:"@id"`
+	Type                 []string                 `json:"@type"`
+	Count                int                      `json:"count"`
+	Pages                []*RegistrationIndexPage `json:"items"`
+}
+
+// RegistrationIndexPage https://docs.microsoft.com/en-us/nuget/api/registration-base-url-resource#registration-page-object
+type RegistrationIndexPage struct {
+	RegistrationPageURL string                       `json:"@id"`
+	Lower               string                       `json:"lower"`
+	Upper               string                       `json:"upper"`
+	Count               int                          `json:"count"`
+	Items               []*RegistrationIndexPageItem `json:"items"`
+}
+
+// RegistrationIndexPageItem https://docs.microsoft.com/en-us/nuget/api/registration-base-url-resource#registration-leaf-object-in-a-page
+type RegistrationIndexPageItem struct {
+	RegistrationLeafURL string        `json:"@id"`
+	PackageContentURL   string        `json:"packageContent"`
+	CatalogEntry        *CatalogEntry `json:"catalogEntry"`
+}
+
+// CatalogEntry https://docs.microsoft.com/en-us/nuget/api/registration-base-url-resource#catalog-entry
+type CatalogEntry struct {
+	CatalogLeafURL           string                    `json:"@id"`
+	PackageContentURL        string                    `json:"packageContent"`
+	ID                       string                    `json:"id"`
+	Version                  string                    `json:"version"`
+	Description              string                    `json:"description"`
+	ReleaseNotes             string                    `json:"releaseNotes"`
+	Authors                  string                    `json:"authors"`
+	RequireLicenseAcceptance bool                      `json:"requireLicenseAcceptance"`
+	ProjectURL               string                    `json:"projectURL"`
+	DependencyGroups         []*PackageDependencyGroup `json:"dependencyGroups"`
+}
+
+// PackageDependencyGroup https://docs.microsoft.com/en-us/nuget/api/registration-base-url-resource#package-dependency-group
+type PackageDependencyGroup struct {
+	TargetFramework string               `json:"targetFramework"`
+	Dependencies    []*PackageDependency `json:"dependencies"`
+}
+
+// PackageDependency https://docs.microsoft.com/en-us/nuget/api/registration-base-url-resource#package-dependency
+type PackageDependency struct {
+	ID    string `json:"id"`
+	Range string `json:"range"`
+}
+
+func createRegistrationIndexResponse(l *linkBuilder, pds []*packages_model.PackageDescriptor) *RegistrationIndexResponse {
+	sort.Slice(pds, func(i, j int) bool {
+		return pds[i].SemVer.LessThan(pds[j].SemVer)
+	})
+
+	items := make([]*RegistrationIndexPageItem, 0, len(pds))
+	for _, p := range pds {
+		items = append(items, createRegistrationIndexPageItem(l, p))
+	}
+
+	return &RegistrationIndexResponse{
+		RegistrationIndexURL: l.GetRegistrationIndexURL(pds[0].Package.Name),
+		Type:                 []string{"catalog:CatalogRoot", "PackageRegistration", "catalog:Permalink"},
+		Count:                1,
+		Pages: []*RegistrationIndexPage{
+			{
+				RegistrationPageURL: l.GetRegistrationIndexURL(pds[0].Package.Name),
+				Count:               len(pds),
+				Lower:               normalizeVersion(pds[0].SemVer),
+				Upper:               normalizeVersion(pds[len(pds)-1].SemVer),
+				Items:               items,
+			},
+		},
+	}
+}
+
+func createRegistrationIndexPageItem(l *linkBuilder, pd *packages_model.PackageDescriptor) *RegistrationIndexPageItem {
+	metadata := pd.Metadata.(*nuget_module.Metadata)
+
+	return &RegistrationIndexPageItem{
+		RegistrationLeafURL: l.GetRegistrationLeafURL(pd.Package.Name, pd.Version.Version),
+		PackageContentURL:   l.GetPackageDownloadURL(pd.Package.Name, pd.Version.Version),
+		CatalogEntry: &CatalogEntry{
+			CatalogLeafURL:    l.GetRegistrationLeafURL(pd.Package.Name, pd.Version.Version),
+			PackageContentURL: l.GetPackageDownloadURL(pd.Package.Name, pd.Version.Version),
+			ID:                pd.Package.Name,
+			Version:           pd.Version.Version,
+			Description:       metadata.Description,
+			ReleaseNotes:      metadata.ReleaseNotes,
+			Authors:           metadata.Authors,
+			ProjectURL:        metadata.ProjectURL,
+			DependencyGroups:  createDependencyGroups(pd),
+		},
+	}
+}
+
+func createDependencyGroups(pd *packages_model.PackageDescriptor) []*PackageDependencyGroup {
+	metadata := pd.Metadata.(*nuget_module.Metadata)
+
+	dependencyGroups := make([]*PackageDependencyGroup, 0, len(metadata.Dependencies))
+	for k, v := range metadata.Dependencies {
+		dependencies := make([]*PackageDependency, 0, len(v))
+		for _, dep := range v {
+			dependencies = append(dependencies, &PackageDependency{
+				ID:    dep.ID,
+				Range: dep.Version,
+			})
+		}
+
+		dependencyGroups = append(dependencyGroups, &PackageDependencyGroup{
+			TargetFramework: k,
+			Dependencies:    dependencies,
+		})
+	}
+	return dependencyGroups
+}
+
+// RegistrationLeafResponse https://docs.microsoft.com/en-us/nuget/api/registration-base-url-resource#registration-leaf
+type RegistrationLeafResponse struct {
+	RegistrationLeafURL  string    `json:"@id"`
+	Type                 []string  `json:"@type"`
+	Listed               bool      `json:"listed"`
+	PackageContentURL    string    `json:"packageContent"`
+	Published            time.Time `json:"published"`
+	RegistrationIndexURL string    `json:"registration"`
+}
+
+func createRegistrationLeafResponse(l *linkBuilder, pd *packages_model.PackageDescriptor) *RegistrationLeafResponse {
+	return &RegistrationLeafResponse{
+		Type:                 []string{"Package", "http://schema.nuget.org/catalog#Permalink"},
+		Listed:               true,
+		Published:            time.Unix(int64(pd.Version.CreatedUnix), 0),
+		RegistrationLeafURL:  l.GetRegistrationLeafURL(pd.Package.Name, pd.Version.Version),
+		PackageContentURL:    l.GetPackageDownloadURL(pd.Package.Name, pd.Version.Version),
+		RegistrationIndexURL: l.GetRegistrationIndexURL(pd.Package.Name),
+	}
+}
+
+// PackageVersionsResponse https://docs.microsoft.com/en-us/nuget/api/package-base-address-resource#response
+type PackageVersionsResponse struct {
+	Versions []string `json:"versions"`
+}
+
+func createPackageVersionsResponse(pds []*packages_model.PackageDescriptor) *PackageVersionsResponse {
+	versions := make([]string, 0, len(pds))
+	for _, pd := range pds {
+		versions = append(versions, normalizeVersion(pd.SemVer))
+	}
+
+	return &PackageVersionsResponse{
+		Versions: versions,
+	}
+}
+
+// SearchResultResponse https://docs.microsoft.com/en-us/nuget/api/search-query-service-resource#response
+type SearchResultResponse struct {
+	TotalHits int64           `json:"totalHits"`
+	Data      []*SearchResult `json:"data"`
+}
+
+// SearchResult https://docs.microsoft.com/en-us/nuget/api/search-query-service-resource#search-result
+type SearchResult struct {
+	ID                   string                 `json:"id"`
+	Version              string                 `json:"version"`
+	Versions             []*SearchResultVersion `json:"versions"`
+	Description          string                 `json:"description"`
+	Authors              string                 `json:"authors"`
+	ProjectURL           string                 `json:"projectURL"`
+	RegistrationIndexURL string                 `json:"registration"`
+}
+
+// SearchResultVersion https://docs.microsoft.com/en-us/nuget/api/search-query-service-resource#search-result
+type SearchResultVersion struct {
+	RegistrationLeafURL string `json:"@id"`
+	Version             string `json:"version"`
+	Downloads           int64  `json:"downloads"`
+}
+
+func createSearchResultResponse(l *linkBuilder, totalHits int64, pds []*packages_model.PackageDescriptor) *SearchResultResponse {
+	data := make([]*SearchResult, 0, len(pds))
+
+	if len(pds) > 0 {
+		groupID := pds[0].Package.Name
+		group := make([]*packages_model.PackageDescriptor, 0, 10)
+
+		for i := 0; i < len(pds); i++ {
+			if groupID != pds[i].Package.Name {
+				data = append(data, createSearchResult(l, group))
+				groupID = pds[i].Package.Name
+				group = group[:0]
+			}
+			group = append(group, pds[i])
+		}
+		data = append(data, createSearchResult(l, group))
+	}
+
+	return &SearchResultResponse{
+		TotalHits: totalHits,
+		Data:      data,
+	}
+}
+
+func createSearchResult(l *linkBuilder, pds []*packages_model.PackageDescriptor) *SearchResult {
+	latest := pds[0]
+	versions := make([]*SearchResultVersion, 0, len(pds))
+	for _, pd := range pds {
+		if latest.SemVer.LessThan(pd.SemVer) {
+			latest = pd
+		}
+
+		versions = append(versions, &SearchResultVersion{
+			RegistrationLeafURL: l.GetRegistrationLeafURL(pd.Package.Name, pd.Version.Version),
+			Version:             pd.Version.Version,
+		})
+	}
+
+	metadata := latest.Metadata.(*nuget_module.Metadata)
+
+	return &SearchResult{
+		ID:                   latest.Package.Name,
+		Version:              latest.Version.Version,
+		Versions:             versions,
+		Description:          metadata.Description,
+		Authors:              metadata.Authors,
+		ProjectURL:           metadata.ProjectURL,
+		RegistrationIndexURL: l.GetRegistrationIndexURL(latest.Package.Name),
+	}
+}
+
+// normalizeVersion removes the metadata
+func normalizeVersion(v *version.Version) string {
+	var buf bytes.Buffer
+	segments := v.Segments64()
+	fmt.Fprintf(&buf, "%d.%d.%d", segments[0], segments[1], segments[2])
+	pre := v.Prerelease()
+	if pre != "" {
+		fmt.Fprintf(&buf, "-%s", pre)
+	}
+	return buf.String()
+}

routers/api/packages/nuget/links.go

@@ -0,0 +1,28 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package nuget
+
+import (
+	"fmt"
+)
+
+type linkBuilder struct {
+	Base string
+}
+
+// GetRegistrationIndexURL builds the registration index url
+func (l *linkBuilder) GetRegistrationIndexURL(id string) string {
+	return fmt.Sprintf("%s/registration/%s/index.json", l.Base, id)
+}
+
+// GetRegistrationLeafURL builds the registration leaf url
+func (l *linkBuilder) GetRegistrationLeafURL(id, version string) string {
+	return fmt.Sprintf("%s/registration/%s/%s.json", l.Base, id, version)
+}
+
+// GetPackageDownloadURL builds the download url
+func (l *linkBuilder) GetPackageDownloadURL(id, version string) string {
+	return fmt.Sprintf("%s/package/%s/%s/%s.%s.nupkg", l.Base, id, version, id, version)
+}

routers/api/packages/nuget/nuget.go

@@ -0,0 +1,421 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package nuget
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"strings"
+
+	"code.gitea.io/gitea/models/db"
+	packages_model "code.gitea.io/gitea/models/packages"
+	"code.gitea.io/gitea/modules/context"
+	packages_module "code.gitea.io/gitea/modules/packages"
+	nuget_module "code.gitea.io/gitea/modules/packages/nuget"
+	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/routers/api/packages/helper"
+	packages_service "code.gitea.io/gitea/services/packages"
+)
+
+func apiError(ctx *context.Context, status int, obj interface{}) {
+	helper.LogAndProcessError(ctx, status, obj, func(message string) {
+		ctx.JSON(status, map[string]string{
+			"Message": message,
+		})
+	})
+}
+
+// ServiceIndex https://docs.microsoft.com/en-us/nuget/api/service-index
+func ServiceIndex(ctx *context.Context) {
+	resp := createServiceIndexResponse(setting.AppURL + "api/packages/" + ctx.Package.Owner.Name + "/nuget")
+
+	ctx.JSON(http.StatusOK, resp)
+}
+
+// SearchService https://docs.microsoft.com/en-us/nuget/api/search-query-service-resource#search-for-packages
+func SearchService(ctx *context.Context) {
+	pvs, count, err := packages_model.SearchVersions(ctx, &packages_model.PackageSearchOptions{
+		OwnerID:   ctx.Package.Owner.ID,
+		Type:      string(packages_model.TypeNuGet),
+		QueryName: ctx.FormTrim("q"),
+		Paginator: db.NewAbsoluteListOptions(
+			ctx.FormInt("skip"),
+			ctx.FormInt("take"),
+		),
+	})
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	pds, err := packages_model.GetPackageDescriptors(ctx, pvs)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	resp := createSearchResultResponse(
+		&linkBuilder{setting.AppURL + "api/packages/" + ctx.Package.Owner.Name + "/nuget"},
+		count,
+		pds,
+	)
+
+	ctx.JSON(http.StatusOK, resp)
+}
+
+// RegistrationIndex https://docs.microsoft.com/en-us/nuget/api/registration-base-url-resource#registration-index
+func RegistrationIndex(ctx *context.Context) {
+	packageName := ctx.Params("id")
+
+	pvs, err := packages_model.GetVersionsByPackageName(ctx, ctx.Package.Owner.ID, packages_model.TypeNuGet, packageName)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+	if len(pvs) == 0 {
+		apiError(ctx, http.StatusNotFound, err)
+		return
+	}
+
+	pds, err := packages_model.GetPackageDescriptors(ctx, pvs)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	resp := createRegistrationIndexResponse(
+		&linkBuilder{setting.AppURL + "api/packages/" + ctx.Package.Owner.Name + "/nuget"},
+		pds,
+	)
+
+	ctx.JSON(http.StatusOK, resp)
+}
+
+// RegistrationLeaf https://docs.microsoft.com/en-us/nuget/api/registration-base-url-resource#registration-leaf
+func RegistrationLeaf(ctx *context.Context) {
+	packageName := ctx.Params("id")
+	packageVersion := strings.TrimSuffix(ctx.Params("version"), ".json")
+
+	pv, err := packages_model.GetVersionByNameAndVersion(db.DefaultContext, ctx.Package.Owner.ID, packages_model.TypeNuGet, packageName, packageVersion)
+	if err != nil {
+		if err == packages_model.ErrPackageNotExist {
+			apiError(ctx, http.StatusNotFound, err)
+			return
+		}
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	pd, err := packages_model.GetPackageDescriptor(ctx, pv)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	resp := createRegistrationLeafResponse(
+		&linkBuilder{setting.AppURL + "api/packages/" + ctx.Package.Owner.Name + "/nuget"},
+		pd,
+	)
+
+	ctx.JSON(http.StatusOK, resp)
+}
+
+// EnumeratePackageVersions https://docs.microsoft.com/en-us/nuget/api/package-base-address-resource#enumerate-package-versions
+func EnumeratePackageVersions(ctx *context.Context) {
+	packageName := ctx.Params("id")
+
+	pvs, err := packages_model.GetVersionsByPackageName(ctx, ctx.Package.Owner.ID, packages_model.TypeNuGet, packageName)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+	if len(pvs) == 0 {
+		apiError(ctx, http.StatusNotFound, err)
+		return
+	}
+
+	pds, err := packages_model.GetPackageDescriptors(ctx, pvs)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	resp := createPackageVersionsResponse(pds)
+
+	ctx.JSON(http.StatusOK, resp)
+}
+
+// DownloadPackageFile https://docs.microsoft.com/en-us/nuget/api/package-base-address-resource#download-package-content-nupkg
+func DownloadPackageFile(ctx *context.Context) {
+	packageName := ctx.Params("id")
+	packageVersion := ctx.Params("version")
+	filename := ctx.Params("filename")
+
+	s, pf, err := packages_service.GetFileStreamByPackageNameAndVersion(
+		ctx,
+		&packages_service.PackageInfo{
+			Owner:       ctx.Package.Owner,
+			PackageType: packages_model.TypeNuGet,
+			Name:        packageName,
+			Version:     packageVersion,
+		},
+		&packages_service.PackageFileInfo{
+			Filename: filename,
+		},
+	)
+	if err != nil {
+		if err == packages_model.ErrPackageNotExist || err == packages_model.ErrPackageFileNotExist {
+			apiError(ctx, http.StatusNotFound, err)
+			return
+		}
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+	defer s.Close()
+
+	ctx.ServeStream(s, pf.Name)
+}
+
+// UploadPackage creates a new package with the metadata contained in the uploaded nupgk file
+// https://docs.microsoft.com/en-us/nuget/api/package-publish-resource#push-a-package
+func UploadPackage(ctx *context.Context) {
+	np, buf, closables := processUploadedFile(ctx, nuget_module.DependencyPackage)
+	defer func() {
+		for _, c := range closables {
+			c.Close()
+		}
+	}()
+	if np == nil {
+		return
+	}
+
+	_, _, err := packages_service.CreatePackageAndAddFile(
+		&packages_service.PackageCreationInfo{
+			PackageInfo: packages_service.PackageInfo{
+				Owner:       ctx.Package.Owner,
+				PackageType: packages_model.TypeNuGet,
+				Name:        np.ID,
+				Version:     np.Version,
+			},
+			SemverCompatible: true,
+			Creator:          ctx.Doer,
+			Metadata:         np.Metadata,
+		},
+		&packages_service.PackageFileCreationInfo{
+			PackageFileInfo: packages_service.PackageFileInfo{
+				Filename: strings.ToLower(fmt.Sprintf("%s.%s.nupkg", np.ID, np.Version)),
+			},
+			Data:   buf,
+			IsLead: true,
+		},
+	)
+	if err != nil {
+		if err == packages_model.ErrDuplicatePackageVersion {
+			apiError(ctx, http.StatusBadRequest, err)
+			return
+		}
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	ctx.Status(http.StatusCreated)
+}
+
+// UploadSymbolPackage adds a symbol package to an existing package
+// https://docs.microsoft.com/en-us/nuget/api/symbol-package-publish-resource
+func UploadSymbolPackage(ctx *context.Context) {
+	np, buf, closables := processUploadedFile(ctx, nuget_module.SymbolsPackage)
+	defer func() {
+		for _, c := range closables {
+			c.Close()
+		}
+	}()
+	if np == nil {
+		return
+	}
+
+	pdbs, err := nuget_module.ExtractPortablePdb(buf, buf.Size())
+	if err != nil {
+		apiError(ctx, http.StatusBadRequest, err)
+		return
+	}
+	defer pdbs.Close()
+
+	if _, err := buf.Seek(0, io.SeekStart); err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	pi := &packages_service.PackageInfo{
+		Owner:       ctx.Package.Owner,
+		PackageType: packages_model.TypeNuGet,
+		Name:        np.ID,
+		Version:     np.Version,
+	}
+
+	_, _, err = packages_service.AddFileToExistingPackage(
+		pi,
+		&packages_service.PackageFileCreationInfo{
+			PackageFileInfo: packages_service.PackageFileInfo{
+				Filename: strings.ToLower(fmt.Sprintf("%s.%s.snupkg", np.ID, np.Version)),
+			},
+			Data:   buf,
+			IsLead: false,
+		},
+	)
+	if err != nil {
+		switch err {
+		case packages_model.ErrPackageNotExist:
+			apiError(ctx, http.StatusNotFound, err)
+		case packages_model.ErrDuplicatePackageFile:
+			apiError(ctx, http.StatusBadRequest, err)
+		default:
+			apiError(ctx, http.StatusInternalServerError, err)
+		}
+		return
+	}
+
+	for _, pdb := range pdbs {
+		_, _, err := packages_service.AddFileToExistingPackage(
+			pi,
+			&packages_service.PackageFileCreationInfo{
+				PackageFileInfo: packages_service.PackageFileInfo{
+					Filename:     strings.ToLower(pdb.Name),
+					CompositeKey: strings.ToLower(pdb.ID),
+				},
+				Data:   pdb.Content,
+				IsLead: false,
+				Properties: map[string]string{
+					nuget_module.PropertySymbolID: strings.ToLower(pdb.ID),
+				},
+			},
+		)
+		if err != nil {
+			switch err {
+			case packages_model.ErrDuplicatePackageFile:
+				apiError(ctx, http.StatusBadRequest, err)
+			default:
+				apiError(ctx, http.StatusInternalServerError, err)
+			}
+			return
+		}
+	}
+
+	ctx.Status(http.StatusCreated)
+}
+
+func processUploadedFile(ctx *context.Context, expectedType nuget_module.PackageType) (*nuget_module.Package, *packages_module.HashedBuffer, []io.Closer) {
+	closables := make([]io.Closer, 0, 2)
+
+	upload, close, err := ctx.UploadStream()
+	if err != nil {
+		apiError(ctx, http.StatusBadRequest, err)
+		return nil, nil, closables
+	}
+
+	if close {
+		closables = append(closables, upload)
+	}
+
+	buf, err := packages_module.CreateHashedBufferFromReader(upload, 32*1024*1024)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return nil, nil, closables
+	}
+	closables = append(closables, buf)
+
+	np, err := nuget_module.ParsePackageMetaData(buf, buf.Size())
+	if err != nil {
+		if err == nuget_module.ErrMissingNuspecFile || err == nuget_module.ErrNuspecFileTooLarge || err == nuget_module.ErrNuspecInvalidID || err == nuget_module.ErrNuspecInvalidVersion {
+			apiError(ctx, http.StatusBadRequest, err)
+		} else {
+			apiError(ctx, http.StatusInternalServerError, err)
+		}
+		return nil, nil, closables
+	}
+	if np.PackageType != expectedType {
+		apiError(ctx, http.StatusBadRequest, errors.New("unexpected package type"))
+		return nil, nil, closables
+	}
+	if _, err := buf.Seek(0, io.SeekStart); err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return nil, nil, closables
+	}
+	return np, buf, closables
+}
+
+// DownloadSymbolFile https://github.com/dotnet/symstore/blob/main/docs/specs/Simple_Symbol_Query_Protocol.md#request
+func DownloadSymbolFile(ctx *context.Context) {
+	filename := ctx.Params("filename")
+	guid := ctx.Params("guid")
+	filename2 := ctx.Params("filename2")
+
+	if filename != filename2 {
+		apiError(ctx, http.StatusBadRequest, nil)
+		return
+	}
+
+	pfs, _, err := packages_model.SearchFiles(ctx, &packages_model.PackageFileSearchOptions{
+		OwnerID:     ctx.Package.Owner.ID,
+		PackageType: string(packages_model.TypeNuGet),
+		Query:       filename,
+		Properties: map[string]string{
+			nuget_module.PropertySymbolID: strings.ToLower(guid),
+		},
+	})
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+	if len(pfs) != 1 {
+		apiError(ctx, http.StatusNotFound, nil)
+		return
+	}
+
+	pv, err := packages_model.GetVersionByID(ctx, pfs[0].VersionID)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	s, _, err := packages_service.GetPackageFileStream(ctx, pv, pfs[0])
+	if err != nil {
+		if err == packages_model.ErrPackageNotExist || err == packages_model.ErrPackageFileNotExist {
+			apiError(ctx, http.StatusNotFound, err)
+			return
+		}
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+	defer s.Close()
+
+	ctx.ServeStream(s, pfs[0].Name)
+}
+
+// DeletePackage hard deletes the package
+// https://docs.microsoft.com/en-us/nuget/api/package-publish-resource#delete-a-package
+func DeletePackage(ctx *context.Context) {
+	packageName := ctx.Params("id")
+	packageVersion := ctx.Params("version")
+
+	err := packages_service.RemovePackageVersionByNameAndVersion(
+		ctx.Doer,
+		&packages_service.PackageInfo{
+			Owner:       ctx.Package.Owner,
+			PackageType: packages_model.TypeNuGet,
+			Name:        packageName,
+			Version:     packageVersion,
+		},
+	)
+	if err != nil {
+		if err == packages_model.ErrPackageNotExist {
+			apiError(ctx, http.StatusNotFound, err)
+			return
+		}
+		apiError(ctx, http.StatusInternalServerError, err)
+	}
+}

routers/api/packages/pypi/pypi.go

@@ -0,0 +1,174 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package pypi
+
+import (
+	"fmt"
+	"io"
+	"net/http"
+	"regexp"
+	"strings"
+
+	packages_model "code.gitea.io/gitea/models/packages"
+	"code.gitea.io/gitea/modules/context"
+	packages_module "code.gitea.io/gitea/modules/packages"
+	pypi_module "code.gitea.io/gitea/modules/packages/pypi"
+	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/modules/templates"
+	"code.gitea.io/gitea/modules/validation"
+	"code.gitea.io/gitea/routers/api/packages/helper"
+	packages_service "code.gitea.io/gitea/services/packages"
+)
+
+// https://www.python.org/dev/peps/pep-0503/#normalized-names
+var normalizer = strings.NewReplacer(".", "-", "_", "-")
+var nameMatcher = regexp.MustCompile(`\A[a-z0-9\.\-_]+\z`)
+
+// https://www.python.org/dev/peps/pep-0440/#appendix-b-parsing-version-strings-with-regular-expressions
+var versionMatcher = regexp.MustCompile(`^([1-9][0-9]*!)?(0|[1-9][0-9]*)(\.(0|[1-9][0-9]*))*((a|b|rc)(0|[1-9][0-9]*))?(\.post(0|[1-9][0-9]*))?(\.dev(0|[1-9][0-9]*))?$`)
+
+func apiError(ctx *context.Context, status int, obj interface{}) {
+	helper.LogAndProcessError(ctx, status, obj, func(message string) {
+		ctx.PlainText(status, message)
+	})
+}
+
+// PackageMetadata returns the metadata for a single package
+func PackageMetadata(ctx *context.Context) {
+	packageName := normalizer.Replace(ctx.Params("id"))
+
+	pvs, err := packages_model.GetVersionsByPackageName(ctx, ctx.Package.Owner.ID, packages_model.TypePyPI, packageName)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+	if len(pvs) == 0 {
+		apiError(ctx, http.StatusNotFound, err)
+		return
+	}
+
+	pds, err := packages_model.GetPackageDescriptors(ctx, pvs)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	ctx.Data["RegistryURL"] = setting.AppURL + "api/packages/" + ctx.Package.Owner.Name + "/pypi"
+	ctx.Data["PackageDescriptor"] = pds[0]
+	ctx.Data["PackageDescriptors"] = pds
+	ctx.Render = templates.HTMLRenderer()
+	ctx.HTML(http.StatusOK, "api/packages/pypi/simple")
+}
+
+// DownloadPackageFile serves the content of a package
+func DownloadPackageFile(ctx *context.Context) {
+	packageName := normalizer.Replace(ctx.Params("id"))
+	packageVersion := ctx.Params("version")
+	filename := ctx.Params("filename")
+
+	s, pf, err := packages_service.GetFileStreamByPackageNameAndVersion(
+		ctx,
+		&packages_service.PackageInfo{
+			Owner:       ctx.Package.Owner,
+			PackageType: packages_model.TypePyPI,
+			Name:        packageName,
+			Version:     packageVersion,
+		},
+		&packages_service.PackageFileInfo{
+			Filename: filename,
+		},
+	)
+	if err != nil {
+		if err == packages_model.ErrPackageNotExist || err == packages_model.ErrPackageFileNotExist {
+			apiError(ctx, http.StatusNotFound, err)
+			return
+		}
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+	defer s.Close()
+
+	ctx.ServeStream(s, pf.Name)
+}
+
+// UploadPackageFile adds a file to the package. If the package does not exist, it gets created.
+func UploadPackageFile(ctx *context.Context) {
+	file, fileHeader, err := ctx.Req.FormFile("content")
+	if err != nil {
+		apiError(ctx, http.StatusBadRequest, err)
+		return
+	}
+	defer file.Close()
+
+	buf, err := packages_module.CreateHashedBufferFromReader(file, 32*1024*1024)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+	defer buf.Close()
+
+	_, _, hashSHA256, _ := buf.Sums()
+
+	if !strings.EqualFold(ctx.Req.FormValue("sha256_digest"), fmt.Sprintf("%x", hashSHA256)) {
+		apiError(ctx, http.StatusBadRequest, "hash mismatch")
+		return
+	}
+
+	if _, err := buf.Seek(0, io.SeekStart); err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	packageName := normalizer.Replace(ctx.Req.FormValue("name"))
+	packageVersion := ctx.Req.FormValue("version")
+	if !nameMatcher.MatchString(packageName) || !versionMatcher.MatchString(packageVersion) {
+		apiError(ctx, http.StatusBadRequest, "invalid name or version")
+		return
+	}
+
+	projectURL := ctx.Req.FormValue("home_page")
+	if !validation.IsValidURL(projectURL) {
+		projectURL = ""
+	}
+
+	_, _, err = packages_service.CreatePackageOrAddFileToExisting(
+		&packages_service.PackageCreationInfo{
+			PackageInfo: packages_service.PackageInfo{
+				Owner:       ctx.Package.Owner,
+				PackageType: packages_model.TypePyPI,
+				Name:        packageName,
+				Version:     packageVersion,
+			},
+			SemverCompatible: true,
+			Creator:          ctx.Doer,
+			Metadata: &pypi_module.Metadata{
+				Author:          ctx.Req.FormValue("author"),
+				Description:     ctx.Req.FormValue("description"),
+				LongDescription: ctx.Req.FormValue("long_description"),
+				Summary:         ctx.Req.FormValue("summary"),
+				ProjectURL:      projectURL,
+				License:         ctx.Req.FormValue("license"),
+				RequiresPython:  ctx.Req.FormValue("requires_python"),
+			},
+		},
+		&packages_service.PackageFileCreationInfo{
+			PackageFileInfo: packages_service.PackageFileInfo{
+				Filename: fileHeader.Filename,
+			},
+			Data:   buf,
+			IsLead: true,
+		},
+	)
+	if err != nil {
+		if err == packages_model.ErrDuplicatePackageFile {
+			apiError(ctx, http.StatusBadRequest, err)
+			return
+		}
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	ctx.Status(http.StatusCreated)
+}

routers/api/packages/rubygems/rubygems.go

@@ -0,0 +1,285 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package rubygems
+
+import (
+	"compress/gzip"
+	"compress/zlib"
+	"fmt"
+	"io"
+	"net/http"
+	"strings"
+
+	packages_model "code.gitea.io/gitea/models/packages"
+	"code.gitea.io/gitea/modules/context"
+	packages_module "code.gitea.io/gitea/modules/packages"
+	rubygems_module "code.gitea.io/gitea/modules/packages/rubygems"
+	"code.gitea.io/gitea/routers/api/packages/helper"
+	packages_service "code.gitea.io/gitea/services/packages"
+)
+
+func apiError(ctx *context.Context, status int, obj interface{}) {
+	helper.LogAndProcessError(ctx, status, obj, func(message string) {
+		ctx.PlainText(status, message)
+	})
+}
+
+// EnumeratePackages serves the package list
+func EnumeratePackages(ctx *context.Context) {
+	packages, err := packages_model.GetVersionsByPackageType(ctx, ctx.Package.Owner.ID, packages_model.TypeRubyGems)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	enumeratePackages(ctx, "specs.4.8", packages)
+}
+
+// EnumeratePackagesLatest serves the list of the lastest version of every package
+func EnumeratePackagesLatest(ctx *context.Context) {
+	pvs, _, err := packages_model.SearchLatestVersions(ctx, &packages_model.PackageSearchOptions{
+		OwnerID: ctx.Package.Owner.ID,
+		Type:    string(packages_model.TypeRubyGems),
+	})
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	enumeratePackages(ctx, "latest_specs.4.8", pvs)
+}
+
+// EnumeratePackagesPreRelease is not supported and serves an empty list
+func EnumeratePackagesPreRelease(ctx *context.Context) {
+	enumeratePackages(ctx, "prerelease_specs.4.8", []*packages_model.PackageVersion{})
+}
+
+func enumeratePackages(ctx *context.Context, filename string, pvs []*packages_model.PackageVersion) {
+	pds, err := packages_model.GetPackageDescriptors(ctx, pvs)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	specs := make([]interface{}, 0, len(pds))
+	for _, p := range pds {
+		specs = append(specs, []interface{}{
+			p.Package.Name,
+			&rubygems_module.RubyUserMarshal{
+				Name:  "Gem::Version",
+				Value: []string{p.Version.Version},
+			},
+			p.Metadata.(*rubygems_module.Metadata).Platform,
+		})
+	}
+
+	ctx.SetServeHeaders(filename + ".gz")
+
+	zw := gzip.NewWriter(ctx.Resp)
+	defer zw.Close()
+
+	zw.Name = filename
+
+	if err := rubygems_module.NewMarshalEncoder(zw).Encode(specs); err != nil {
+		ctx.ServerError("Download file failed", err)
+	}
+}
+
+// ServePackageSpecification serves the compressed Gemspec file of a package
+func ServePackageSpecification(ctx *context.Context) {
+	filename := ctx.Params("filename")
+
+	if !strings.HasSuffix(filename, ".gemspec.rz") {
+		apiError(ctx, http.StatusNotImplemented, nil)
+		return
+	}
+
+	pvs, err := packages_model.GetVersionsByFilename(ctx, ctx.Package.Owner.ID, packages_model.TypeRubyGems, filename[:len(filename)-10]+"gem")
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	if len(pvs) != 1 {
+		apiError(ctx, http.StatusNotFound, nil)
+		return
+	}
+
+	pd, err := packages_model.GetPackageDescriptor(ctx, pvs[0])
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	ctx.SetServeHeaders(filename)
+
+	zw := zlib.NewWriter(ctx.Resp)
+	defer zw.Close()
+
+	metadata := pd.Metadata.(*rubygems_module.Metadata)
+
+	// create a Ruby Gem::Specification object
+	spec := &rubygems_module.RubyUserDef{
+		Name: "Gem::Specification",
+		Value: []interface{}{
+			"3.2.3", // @rubygems_version
+			4,       // @specification_version,
+			pd.Package.Name,
+			&rubygems_module.RubyUserMarshal{
+				Name:  "Gem::Version",
+				Value: []string{pd.Version.Version},
+			},
+			nil,               // date
+			metadata.Summary,  // @summary
+			nil,               // @required_ruby_version
+			nil,               // @required_rubygems_version
+			metadata.Platform, // @original_platform
+			[]interface{}{},   // @dependencies
+			nil,               // rubyforge_project
+			"",                // @email
+			metadata.Authors,
+			metadata.Description,
+			metadata.ProjectURL,
+			true,              // has_rdoc
+			metadata.Platform, // @new_platform
+			nil,
+			metadata.Licenses,
+		},
+	}
+
+	if err := rubygems_module.NewMarshalEncoder(zw).Encode(spec); err != nil {
+		ctx.ServerError("Download file failed", err)
+	}
+}
+
+// DownloadPackageFile serves the content of a package
+func DownloadPackageFile(ctx *context.Context) {
+	filename := ctx.Params("filename")
+
+	pvs, err := packages_model.GetVersionsByFilename(ctx, ctx.Package.Owner.ID, packages_model.TypeRubyGems, filename)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	if len(pvs) != 1 {
+		apiError(ctx, http.StatusNotFound, nil)
+		return
+	}
+
+	s, pf, err := packages_service.GetFileStreamByPackageVersion(
+		ctx,
+		pvs[0],
+		&packages_service.PackageFileInfo{
+			Filename: filename,
+		},
+	)
+	if err != nil {
+		if err == packages_model.ErrPackageFileNotExist {
+			apiError(ctx, http.StatusNotFound, err)
+			return
+		}
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+	defer s.Close()
+
+	ctx.ServeStream(s, pf.Name)
+}
+
+// UploadPackageFile adds a file to the package. If the package does not exist, it gets created.
+func UploadPackageFile(ctx *context.Context) {
+	upload, close, err := ctx.UploadStream()
+	if err != nil {
+		apiError(ctx, http.StatusBadRequest, err)
+		return
+	}
+	if close {
+		defer upload.Close()
+	}
+
+	buf, err := packages_module.CreateHashedBufferFromReader(upload, 32*1024*1024)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+	defer buf.Close()
+
+	rp, err := rubygems_module.ParsePackageMetaData(buf)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+	if _, err := buf.Seek(0, io.SeekStart); err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	var filename string
+	if rp.Metadata.Platform == "" || rp.Metadata.Platform == "ruby" {
+		filename = strings.ToLower(fmt.Sprintf("%s-%s.gem", rp.Name, rp.Version))
+	} else {
+		filename = strings.ToLower(fmt.Sprintf("%s-%s-%s.gem", rp.Name, rp.Version, rp.Metadata.Platform))
+	}
+
+	_, _, err = packages_service.CreatePackageAndAddFile(
+		&packages_service.PackageCreationInfo{
+			PackageInfo: packages_service.PackageInfo{
+				Owner:       ctx.Package.Owner,
+				PackageType: packages_model.TypeRubyGems,
+				Name:        rp.Name,
+				Version:     rp.Version,
+			},
+			SemverCompatible: true,
+			Creator:          ctx.Doer,
+			Metadata:         rp.Metadata,
+		},
+		&packages_service.PackageFileCreationInfo{
+			PackageFileInfo: packages_service.PackageFileInfo{
+				Filename: filename,
+			},
+			Data:   buf,
+			IsLead: true,
+		},
+	)
+	if err != nil {
+		if err == packages_model.ErrDuplicatePackageVersion {
+			apiError(ctx, http.StatusBadRequest, err)
+			return
+		}
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	ctx.Status(http.StatusCreated)
+}
+
+// DeletePackage deletes a package
+func DeletePackage(ctx *context.Context) {
+	// Go populates the form only for POST, PUT and PATCH requests
+	if err := ctx.Req.ParseMultipartForm(32 << 20); err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+	packageName := ctx.FormString("gem_name")
+	packageVersion := ctx.FormString("version")
+
+	err := packages_service.RemovePackageVersionByNameAndVersion(
+		ctx.Doer,
+		&packages_service.PackageInfo{
+			Owner:       ctx.Package.Owner,
+			PackageType: packages_model.TypeRubyGems,
+			Name:        packageName,
+			Version:     packageVersion,
+		},
+	)
+	if err != nil {
+		if err == packages_model.ErrPackageNotExist {
+			apiError(ctx, http.StatusNotFound, err)
+			return
+		}
+		apiError(ctx, http.StatusInternalServerError, err)
+	}
+}