101 lines
2.6 KiB
Go
101 lines
2.6 KiB
Go
package git
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"io"
|
|
|
|
"gitlab.com/gitlab-org/gitaly/v15/proto/go/gitalypb"
|
|
"google.golang.org/grpc/status"
|
|
|
|
"gitlab.com/gitlab-org/gitlab/workhorse/internal/log"
|
|
)
|
|
|
|
// For unwrapping google.golang.org/grpc/internal/status.Error
|
|
type grpcErr interface {
|
|
GRPCStatus() *status.Status
|
|
Error() string
|
|
}
|
|
|
|
// For cosmetic purposes in Sentry
|
|
type copyError struct{ error }
|
|
|
|
// handleLimitErr handles errors that come back from Gitaly that may be a
|
|
// LimitError. A LimitError is returned by Gitaly when it is at its limit in
|
|
// handling requests. Since this is a known error, we should print a sensible
|
|
// error message to the end user.
|
|
func handleLimitErr(err error, w io.Writer, f func(w io.Writer) error) {
|
|
var statusErr grpcErr
|
|
if !errors.As(err, &statusErr) {
|
|
return
|
|
}
|
|
|
|
if st, ok := status.FromError(statusErr); ok {
|
|
details := st.Details()
|
|
for _, detail := range details {
|
|
switch detail.(type) {
|
|
case *gitalypb.LimitError:
|
|
if err := f(w); err != nil {
|
|
log.WithError(fmt.Errorf("handling limit error: %w", err))
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// writeReceivePackError writes a "server is busy" error message to the
|
|
// git-receive-pack-result.
|
|
//
|
|
// 0023\x01001aunpack server is busy
|
|
// 00000044\x2GitLab is currently unable to handle this request due to load.
|
|
// 0000
|
|
//
|
|
// We write a line reporting that unpack failed, and then provide some progress
|
|
// information through the side-band 2 channel.
|
|
// See https://gitlab.com/gitlab-org/gitaly/-/tree/jc-return-structured-error-limits
|
|
// for more details.
|
|
func writeReceivePackError(w io.Writer) error {
|
|
if _, err := fmt.Fprintf(w, "%04x", 35); err != nil {
|
|
return err
|
|
}
|
|
|
|
if _, err := w.Write([]byte{0x01}); err != nil {
|
|
return err
|
|
}
|
|
|
|
if _, err := fmt.Fprintf(w, "%04xunpack server is busy\n", 26); err != nil {
|
|
return err
|
|
}
|
|
|
|
if _, err := w.Write([]byte("0000")); err != nil {
|
|
return err
|
|
}
|
|
|
|
if _, err := fmt.Fprintf(w, "%04x", 68); err != nil {
|
|
return err
|
|
}
|
|
|
|
if _, err := w.Write([]byte{0x2}); err != nil {
|
|
return err
|
|
}
|
|
|
|
if _, err := fmt.Fprint(w, "GitLab is currently unable to handle this request due to load.\n"); err != nil {
|
|
return err
|
|
}
|
|
|
|
if _, err := w.Write([]byte("0000")); err != nil {
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// writeUploadPackError writes a "server is busy" error message that git
|
|
// understands and prints to stdout. UploadPack expects to receive pack data in
|
|
// PKT-LINE format. An error-line can be passed that begins with ERR.
|
|
// See https://git-scm.com/docs/pack-protocol/2.29.0#_pkt_line_format.
|
|
func writeUploadPackError(w io.Writer) error {
|
|
_, err := fmt.Fprintf(w, "%04xERR GitLab is currently unable to handle this request due to load.\n", 71)
|
|
return err
|
|
}
|