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drone/app/api/handler/repo/git_info_refs.go
2024-05-23 04:56:26 +00:00

73 lines
2.6 KiB
Go

// Copyright 2023 Harness, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package repo
import (
"errors"
"fmt"
"net/http"
apiauth "github.com/harness/gitness/app/api/auth"
"github.com/harness/gitness/app/api/controller/repo"
"github.com/harness/gitness/app/api/render"
"github.com/harness/gitness/app/api/request"
"github.com/harness/gitness/app/auth"
"github.com/harness/gitness/app/url"
)
// HandleGitInfoRefs handles the info refs part of git's smart http protocol.
func HandleGitInfoRefs(repoCtrl *repo.Controller, urlProvider url.Provider) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
ctx := r.Context()
session, _ := request.AuthSessionFrom(ctx)
repoRef, err := request.GetRepoRefFromPath(r)
if err != nil {
render.TranslatedUserError(ctx, w, err)
return
}
gitProtocol := request.GetGitProtocolFromHeadersOrDefault(r, "")
service, err := request.GetGitServiceTypeFromQuery(r)
if err != nil {
render.TranslatedUserError(ctx, w, err)
return
}
// Clients MUST NOT reuse or revalidate a cached response.
// Servers MUST include sufficient Cache-Control headers to prevent caching of the response.
// https://git-scm.com/docs/http-protocol
render.NoCache(w)
w.Header().Set("Content-Type", fmt.Sprintf("application/x-git-%s-advertisement", service))
err = repoCtrl.GitInfoRefs(ctx, session, repoRef, service, gitProtocol, w)
if errors.Is(err, apiauth.ErrNotAuthorized) && auth.IsAnonymousSession(session) {
renderBasicAuth(w, urlProvider)
return
}
if err != nil {
render.TranslatedUserError(ctx, w, err)
return
}
}
}
// renderBasicAuth renders a response that indicates that the client (GIT) requires basic authentication.
// This is required in order to tell git CLI to query user credentials.
func renderBasicAuth(w http.ResponseWriter, urlProvider url.Provider) {
// Git doesn't seem to handle "realm" - so it doesn't seem to matter for basic user CLI interactions.
w.Header().Add("WWW-Authenticate", fmt.Sprintf(`Basic realm="%s"`, urlProvider.GetAPIHostname()))
w.WriteHeader(http.StatusUnauthorized)
}