package http import ( "bufio" "bytes" "fmt" "io" "net/http" "strings" "gopkg.in/src-d/go-git.v4/plumbing" "gopkg.in/src-d/go-git.v4/plumbing/format/packp/pktline" "gopkg.in/src-d/go-git.v4/plumbing/transport" ) type fetchPackSession struct { *session } func newFetchPackSession(c *http.Client, ep transport.Endpoint) transport.FetchPackSession { return &fetchPackSession{ session: &session{ auth: basicAuthFromEndpoint(ep), client: c, endpoint: ep, }, } } func (s *fetchPackSession) AdvertisedReferences() (*transport.UploadPackInfo, error) { url := fmt.Sprintf( "%s/info/refs?service=%s", s.endpoint.String(), transport.UploadPackServiceName, ) req, err := http.NewRequest(http.MethodGet, url, nil) if err != nil { return nil, err } s.applyAuthToRequest(req) s.applyHeadersToRequest(req, nil) res, err := s.client.Do(req) if err != nil { return nil, err } defer res.Body.Close() if res.StatusCode == http.StatusUnauthorized { return nil, transport.ErrAuthorizationRequired } i := transport.NewUploadPackInfo() return i, i.Decode(res.Body) } func (s *fetchPackSession) FetchPack(r *transport.UploadPackRequest) (io.ReadCloser, error) { url := fmt.Sprintf( "%s/%s", s.endpoint.String(), transport.UploadPackServiceName, ) res, err := s.doRequest("POST", url, r.Reader()) if err != nil { return nil, err } reader := newBufferedReadCloser(res.Body) if _, err := reader.Peek(1); err != nil { if err == io.ErrUnexpectedEOF { return nil, transport.ErrEmptyUploadPackRequest } return nil, err } if err := discardResponseInfo(reader); err != nil { return nil, err } return reader, nil } // Close does nothing. func (s *fetchPackSession) Close() error { return nil } func discardResponseInfo(r io.Reader) error { s := pktline.NewScanner(r) for s.Scan() { if bytes.Equal(s.Bytes(), []byte{'N', 'A', 'K', '\n'}) { break } } return s.Err() } func (s *fetchPackSession) doRequest(method, url string, content *strings.Reader) (*http.Response, error) { var body io.Reader if content != nil { body = content } req, err := http.NewRequest(method, url, body) if err != nil { return nil, plumbing.NewPermanentError(err) } s.applyHeadersToRequest(req, content) s.applyAuthToRequest(req) res, err := s.client.Do(req) if err != nil { return nil, plumbing.NewUnexpectedError(err) } if err := NewErr(res); err != nil { _ = res.Body.Close() return nil, err } return res, nil } func (s *fetchPackSession) applyHeadersToRequest(req *http.Request, content *strings.Reader) { req.Header.Add("User-Agent", "git/1.0") req.Header.Add("Host", "github.com") if content == nil { req.Header.Add("Accept", "*/*") } else { req.Header.Add("Accept", "application/x-git-upload-pack-result") req.Header.Add("Content-Type", "application/x-git-upload-pack-request") req.Header.Add("Content-Length", string(content.Len())) } } type bufferedReadCloser struct { *bufio.Reader closer io.Closer } func newBufferedReadCloser(r io.ReadCloser) *bufferedReadCloser { return &bufferedReadCloser{bufio.NewReader(r), r} } func (r *bufferedReadCloser) Close() error { return r.closer.Close() }