113 lines
3.1 KiB
Go
113 lines
3.1 KiB
Go
package git
|
|
|
|
import (
|
|
"compress/gzip"
|
|
"context"
|
|
"fmt"
|
|
"io"
|
|
"net/http"
|
|
"sync"
|
|
|
|
"github.com/golang/gddo/httputil"
|
|
grpccodes "google.golang.org/grpc/codes"
|
|
grpcstatus "google.golang.org/grpc/status"
|
|
|
|
"gitlab.com/gitlab-org/gitlab/workhorse/internal/api"
|
|
"gitlab.com/gitlab-org/gitlab/workhorse/internal/gitaly"
|
|
"gitlab.com/gitlab-org/gitlab/workhorse/internal/helper"
|
|
)
|
|
|
|
func GetInfoRefsHandler(a *api.API) http.Handler {
|
|
return repoPreAuthorizeHandler(a, handleGetInfoRefs)
|
|
}
|
|
|
|
func handleGetInfoRefs(rw http.ResponseWriter, r *http.Request, a *api.Response) {
|
|
responseWriter := NewHttpResponseWriter(rw)
|
|
// Log 0 bytes in because we ignore the request body (and there usually is none anyway).
|
|
defer responseWriter.Log(r, 0)
|
|
|
|
rpc := getService(r)
|
|
|
|
if !(rpc == "git-upload-pack" || rpc == "git-receive-pack") {
|
|
// The 'dumb' Git HTTP protocol is not supported
|
|
http.Error(responseWriter, "Not Found", 404)
|
|
return
|
|
}
|
|
|
|
responseWriter.Header().Set("Content-Type", fmt.Sprintf("application/x-%s-advertisement", rpc))
|
|
responseWriter.Header().Set("Cache-Control", "no-cache")
|
|
|
|
gitProtocol := r.Header.Get("Git-Protocol")
|
|
|
|
offers := []string{"gzip", "identity"}
|
|
encoding := httputil.NegotiateContentEncoding(r, offers)
|
|
|
|
if err := handleGetInfoRefsWithGitaly(r.Context(), responseWriter, a, rpc, gitProtocol, encoding); err != nil {
|
|
status := grpcstatus.Convert(err)
|
|
err = fmt.Errorf("handleGetInfoRefs: %v", err)
|
|
|
|
if status != nil && status.Code() == grpccodes.Unavailable {
|
|
helper.CaptureAndFail(responseWriter, r, err, "The git server, Gitaly, is not available at this time. Please contact your administrator.", http.StatusServiceUnavailable)
|
|
} else {
|
|
helper.Fail500(responseWriter, r, err)
|
|
}
|
|
}
|
|
}
|
|
|
|
func handleGetInfoRefsWithGitaly(ctx context.Context, responseWriter *HttpResponseWriter, a *api.Response, rpc, gitProtocol, encoding string) error {
|
|
ctx, smarthttp, err := gitaly.NewSmartHTTPClient(
|
|
ctx,
|
|
a.GitalyServer,
|
|
gitaly.WithFeatures(a.GitalyServer.Features),
|
|
gitaly.WithUserID(a.GL_ID),
|
|
gitaly.WithUsername(a.GL_USERNAME),
|
|
)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
infoRefsResponseReader, err := smarthttp.InfoRefsResponseReader(ctx, &a.Repository, rpc, gitConfigOptions(a), gitProtocol)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
var w io.WriteCloser = nopCloser{responseWriter}
|
|
if encoding == "gzip" {
|
|
gzWriter := getGzWriter(responseWriter)
|
|
defer putGzWriter(gzWriter)
|
|
|
|
w = gzWriter
|
|
responseWriter.Header().Set("Content-Encoding", "gzip")
|
|
}
|
|
|
|
if _, err = io.Copy(w, infoRefsResponseReader); err != nil {
|
|
return err
|
|
}
|
|
|
|
if err := w.Close(); err != nil {
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
var gzipPool = &sync.Pool{New: func() interface{} {
|
|
// Invariant: the inner writer is io.Discard. We do not want to retain
|
|
// response writers of past requests in the pool.
|
|
return gzip.NewWriter(io.Discard)
|
|
}}
|
|
|
|
func getGzWriter(w io.Writer) *gzip.Writer {
|
|
gzWriter := gzipPool.Get().(*gzip.Writer)
|
|
gzWriter.Reset(w)
|
|
return gzWriter
|
|
}
|
|
|
|
func putGzWriter(w *gzip.Writer) {
|
|
w.Reset(io.Discard) // Maintain pool invariant
|
|
gzipPool.Put(w)
|
|
}
|
|
|
|
type nopCloser struct{ io.Writer }
|
|
|
|
func (nc nopCloser) Close() error { return nil }
|