Add a minimal JSON template to the PyPI registry

routers/api/packages/api.go

@@ -581,6 +581,7 @@ func CommonRoutes() *web.Route {
 			r.Post("/", reqPackageAccess(perm.AccessModeWrite), enforcePackagesQuota(), pypi.UploadPackageFile)
 			r.Get("/files/{id}/{version}/{filename}", pypi.DownloadPackageFile)
 			r.Get("/simple/{id}", pypi.PackageMetadata)
+			r.Get("/{id}/json", pypi.JSONPackageMetadata)
 		}, reqPackageAccess(perm.AccessModeRead))
 		r.Group("/rpm", func() {
 			r.Group("/repository.key", func() {

routers/api/packages/pypi/pypi.go

@@ -75,6 +75,37 @@ func PackageMetadata(ctx *context.Context) {
 	ctx.HTML(http.StatusOK, "api/packages/pypi/simple")
 }
 
+// JSONPackageMetadata returns the same data as PackageMetadata, but in JSON
+func JSONPackageMetadata(ctx *contex.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
+	}
+
+	// sort package descriptors by version to mimic PyPI format
+	sort.Slice(pds, func(i, j int) bool {
+		return strings.Compare(pds[i].Version.Version, pds[j].Version.Version) < 0
+	})
+	ctx.Data["RegistryURL"] = setting.AppURL + "api/packages/" + ctx.Package.Owner.Name + "/pypi"
+	ctx.Data["PackageDescriptor"] = pds[0]
+	ctx.Data["PackageDescriptors"] = pds
+	ctx.JSONTemplate(http.StatusOK, "api/packages/pypi/simple")
+}
+
+	
 // DownloadPackageFile serves the content of a package
 func DownloadPackageFile(ctx *context.Context) {
 	packageName := normalizer.Replace(ctx.Params("id"))

templates/api/packages/pypi/json.tmpl

@@ -0,0 +1,14 @@
+{
+    "info": {
+	"name": "{{.PackageDescriptor.Package.Name}}",
+	"urls": [{{range .PackageDescriptors}}{{$p := ..}}{{range .Files}}
+	    {
+		"digests": {
+		    "sha256": "{{.Blob.HashSHA256}}"
+		},
+		"url": "{{$.RegistryURL}}/files/{{$p.Package.LowerName}}/{{$p.Version.Version}}/{{.File.Name}}"{{if $p.Metadata.RequiresPython}},
+		"requires_python": "{{$p.Metadata.RequiresPython}}"{{end}}
+	    }
+		 {{end}}{{end}}]
+    }
+}