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|
package http
import (
"bytes"
"fmt"
"io"
"net/http"
"strings"
"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/utils/ioutil"
)
type fetchPackSession struct {
*session
advRefsRun bool
}
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) {
if s.advRefsRun {
return nil, transport.ErrAdvertistedReferencesAlreadyCalled
}
defer func() { s.advRefsRun = true }()
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()
if err := i.Decode(res.Body); err != nil {
if err == packp.ErrEmpty {
err = transport.ErrEmptyRemoteRepository
}
return nil, err
}
return i, nil
}
func (s *fetchPackSession) FetchPack(r *transport.UploadPackRequest) (io.ReadCloser, error) {
if r.IsEmpty() {
return nil, transport.ErrEmptyUploadPackRequest
}
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, err := ioutil.NonEmptyReader(res.Body)
if err == ioutil.ErrEmptyReader || err == io.ErrUnexpectedEOF {
return nil, transport.ErrEmptyUploadPackRequest
}
if err != nil {
return nil, err
}
rc := ioutil.NewReadCloser(reader, res.Body)
if err := discardResponseInfo(rc); err != nil {
return nil, err
}
return rc, 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()))
}
}
|
