Support for grouping RPMs using paths (#26984)

The current rpm repository places all packages in the same repository,
and different systems (el7,f34) may hit packages that do not belong to
this distribution ( #25304 ) , which now supports grouping of rpm.

![图片](https://github.com/go-gitea/gitea/assets/33776693/d1e1d99f-7799-4b2b-a19b-cb2a5c692914)

Fixes #25304 .
Fixes #27056 .

Refactor: [#25866](https://github.com/go-gitea/gitea/pull/25866)

routers/api/packages/api.go

@@ -512,19 +512,7 @@ func CommonRoutes() *web.Route {
 			r.Get("/files/{id}/{version}/{filename}", pypi.DownloadPackageFile)
 			r.Get("/simple/{id}", pypi.PackageMetadata)
 		}, reqPackageAccess(perm.AccessModeRead))
-		r.Group("/rpm", func() {
-			r.Get(".repo", rpm.GetRepositoryConfig)
-			r.Get("/repository.key", rpm.GetRepositoryKey)
-			r.Put("/upload", reqPackageAccess(perm.AccessModeWrite), rpm.UploadPackageFile)
-			r.Group("/package/{name}/{version}/{architecture}", func() {
-				r.Get("", rpm.DownloadPackageFile)
-				r.Delete("", reqPackageAccess(perm.AccessModeWrite), rpm.DeletePackageFile)
-			})
-			r.Group("/repodata/{filename}", func() {
-				r.Head("", rpm.CheckRepositoryFileExistence)
-				r.Get("", rpm.GetRepositoryFile)
-			})
-		}, reqPackageAccess(perm.AccessModeRead))
+		r.Group("/rpm", RpmRoutes(r), reqPackageAccess(perm.AccessModeRead))
 		r.Group("/rubygems", func() {
 			r.Get("/specs.4.8.gz", rubygems.EnumeratePackages)
 			r.Get("/latest_specs.4.8.gz", rubygems.EnumeratePackagesLatest)
@@ -589,6 +577,82 @@ func CommonRoutes() *web.Route {
 	return r
 }
 
+// Support for uploading rpm packages with arbitrary depth paths
+func RpmRoutes(r *web.Route) func() {
+	var (
+		groupRepoInfo = regexp.MustCompile(`\A((?:/(?:[^/]+))*|)\.repo\z`)
+		groupUpload   = regexp.MustCompile(`\A((?:/(?:[^/]+))*|)/upload\z`)
+		groupRpm      = regexp.MustCompile(`\A((?:/(?:[^/]+))*|)/package/([^/]+)/([^/]+)/([^/]+)(?:/([^/]+\.rpm)|)\z`)
+		groupMetadata = regexp.MustCompile(`\A((?:/(?:[^/]+))*|)/repodata/([^/]+)\z`)
+	)
+
+	return func() {
+		r.Methods("HEAD,GET,POST,PUT,PATCH,DELETE", "*", func(ctx *context.Context) {
+			path := ctx.Params("*")
+			isHead := ctx.Req.Method == "HEAD"
+			isGetHead := ctx.Req.Method == "HEAD" || ctx.Req.Method == "GET"
+			isPut := ctx.Req.Method == "PUT"
+			isDelete := ctx.Req.Method == "DELETE"
+
+			if path == "/repository.key" && isGetHead {
+				rpm.GetRepositoryKey(ctx)
+				return
+			}
+
+			// get repo
+			m := groupRepoInfo.FindStringSubmatch(path)
+			if len(m) == 2 && isGetHead {
+				ctx.SetParams("group", strings.Trim(m[1], "/"))
+				rpm.GetRepositoryConfig(ctx)
+				return
+			}
+			// get meta
+			m = groupMetadata.FindStringSubmatch(path)
+			if len(m) == 3 && isGetHead {
+				ctx.SetParams("group", strings.Trim(m[1], "/"))
+				ctx.SetParams("filename", m[2])
+				if isHead {
+					rpm.CheckRepositoryFileExistence(ctx)
+				} else {
+					rpm.GetRepositoryFile(ctx)
+				}
+				return
+			}
+			// upload
+			m = groupUpload.FindStringSubmatch(path)
+			if len(m) == 2 && isPut {
+				reqPackageAccess(perm.AccessModeWrite)(ctx)
+				if ctx.Written() {
+					return
+				}
+				ctx.SetParams("group", strings.Trim(m[1], "/"))
+				rpm.UploadPackageFile(ctx)
+				return
+			}
+			// rpm down/delete
+			m = groupRpm.FindStringSubmatch(path)
+			if len(m) == 6 {
+				ctx.SetParams("group", strings.Trim(m[1], "/"))
+				ctx.SetParams("name", m[2])
+				ctx.SetParams("version", m[3])
+				ctx.SetParams("architecture", m[4])
+				if isGetHead {
+					rpm.DownloadPackageFile(ctx)
+					return
+				} else if isDelete {
+					reqPackageAccess(perm.AccessModeWrite)(ctx)
+					if ctx.Written() {
+						return
+					}
+					rpm.DeletePackageFile(ctx)
+				}
+			}
+			// default
+			ctx.Status(http.StatusNotFound)
+		})
+	}
+}
+
 // ContainerRoutes provides endpoints that implement the OCI API to serve containers
 // These have to be mounted on `/v2/...` to comply with the OCI spec:
 // https://github.com/opencontainers/distribution-spec/blob/main/spec.md