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package http
import (
"bytes"
"fmt"
"io"
"net/http"
"strconv"
"gopkg.in/src-d/go-git.v4/plumbing"
"gopkg.in/src-d/go-git.v4/plumbing/format/pktline"
"gopkg.in/src-d/go-git.v4/plumbing/protocol/packp"
"gopkg.in/src-d/go-git.v4/plumbing/transport"
"gopkg.in/src-d/go-git.v4/plumbing/transport/internal/common"
"gopkg.in/src-d/go-git.v4/utils/ioutil"
)
type upSession struct {
*session
}
func newUploadPackSession(c *http.Client, ep transport.Endpoint, auth transport.AuthMethod) (transport.UploadPackSession, error) {
s := &session{
auth: basicAuthFromEndpoint(ep),
client: c,
endpoint: ep,
}
if auth != nil {
a, ok := auth.(AuthMethod)
if !ok {
return nil, transport.ErrInvalidAuthMethod
}
s.auth = a
}
return &upSession{session: s}, nil
}
func (s *upSession) AdvertisedReferences() (*packp.AdvRefs, error) {
if s.advRefs != nil {
return s.advRefs, nil
}
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
}
ar := packp.NewAdvRefs()
if err := ar.Decode(res.Body); err != nil {
if err == packp.ErrEmptyAdvRefs {
err = transport.ErrEmptyRemoteRepository
}
return nil, err
}
transport.FilterUnsupportedCapabilities(ar.Capabilities)
s.advRefs = ar
return ar, nil
}
func (s *upSession) UploadPack(req *packp.UploadPackRequest) (*packp.UploadPackResponse, error) {
if req.IsEmpty() {
return nil, transport.ErrEmptyUploadPackRequest
}
if err := req.Validate(); err != nil {
return nil, err
}
url := fmt.Sprintf(
"%s/%s",
s.endpoint.String(), transport.UploadPackServiceName,
)
content, err := uploadPackRequestToReader(req)
if err != nil {
return nil, err
}
res, err := s.doRequest(http.MethodPost, url, content)
if err != nil {
return nil, err
}
r, err := ioutil.NonEmptyReader(res.Body)
if err != nil {
if err == ioutil.ErrEmptyReader || err == io.ErrUnexpectedEOF {
return nil, transport.ErrEmptyUploadPackRequest
}
return nil, err
}
rc := ioutil.NewReadCloser(r, res.Body)
return common.DecodeUploadPackResponse(rc, req)
}
// Close does nothing.
func (s *upSession) Close() error {
return nil
}
func (s *upSession) doRequest(method, url string, content *bytes.Buffer) (*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
}
// it requires a bytes.Buffer, because we need to know the length
func (s *upSession) applyHeadersToRequest(req *http.Request, content *bytes.Buffer) {
req.Header.Add("User-Agent", "git/1.0")
req.Header.Add("Host", s.endpoint.Host)
if content == nil {
req.Header.Add("Accept", "*/*")
return
}
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", strconv.Itoa(content.Len()))
}
func uploadPackRequestToReader(req *packp.UploadPackRequest) (*bytes.Buffer, error) {
buf := bytes.NewBuffer(nil)
e := pktline.NewEncoder(buf)
if err := req.UploadRequest.Encode(buf); err != nil {
return nil, fmt.Errorf("sending upload-req message: %s", err)
}
if err := req.UploadHaves.Encode(buf); err != nil {
return nil, fmt.Errorf("sending haves message: %s", err)
}
_ = e.EncodeString("done\n")
return buf, nil
}
|
