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Separate init blob upload

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Pushing a v2 image layer has two steps:

- POST to get a new upload URL
- PUT to that upload URL

We were previously not checking the response code of
the POST request and the PUT would fail in weird ways.

Docker-DCO-1.1-Signed-off-by: Josh Hawn <josh.hawn@docker.com> (github: jlhawn)
This commit is contained in:
Josh Hawn 2015-03-20 12:10:06 -07:00
parent 4377a9a3bc
commit bcccf35bb2
1 changed files with 49 additions and 18 deletions
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67
docs/session_v2.go
View file

@ -5,6 +5,7 @@ import (
"fmt"
"io"
"io/ioutil"
"net/http"
"strconv"
log "github.com/Sirupsen/logrus"
@ -209,29 +210,14 @@ func (r *Session) GetV2ImageBlobReader(ep *Endpoint, imageName, sumType, sum str
// 'layer' is an uncompressed reader of the blob to be pushed.
// The server will generate it's own checksum calculation.
func (r *Session) PutV2ImageBlob(ep *Endpoint, imageName, sumType, sumStr string, blobRdr io.Reader, auth *RequestAuthorization) error {
routeURL, err := getV2Builder(ep).BuildBlobUploadURL(imageName)
location, err := r.initiateBlobUpload(ep, imageName, auth)
if err != nil {
return err
}
log.Debugf("[registry] Calling %q %s", "POST", routeURL)
req, err := r.reqFactory.NewRequest("POST", routeURL, nil)
if err != nil {
return err
}
if err := auth.Authorize(req); err != nil {
return err
}
res, _, err := r.doRequest(req)
if err != nil {
return err
}
location := res.Header.Get("Location")
method := "PUT"
log.Debugf("[registry] Calling %q %s", method, location)
req, err = r.reqFactory.NewRequest(method, location, ioutil.NopCloser(blobRdr))
req, err := r.reqFactory.NewRequest(method, location, ioutil.NopCloser(blobRdr))
if err != nil {
return err
}
@ -241,7 +227,7 @@ func (r *Session) PutV2ImageBlob(ep *Endpoint, imageName, sumType, sumStr string
if err := auth.Authorize(req); err != nil {
return err
}
res, _, err = r.doRequest(req)
res, _, err := r.doRequest(req)
if err != nil {
return err
}
@ -262,6 +248,51 @@ func (r *Session) PutV2ImageBlob(ep *Endpoint, imageName, sumType, sumStr string
return nil
}
// initiateBlobUpload gets the blob upload location for the given image name.
func (r *Session) initiateBlobUpload(ep *Endpoint, imageName string, auth *RequestAuthorization) (location string, err error) {
routeURL, err := getV2Builder(ep).BuildBlobUploadURL(imageName)
if err != nil {
return "", err
}
log.Debugf("[registry] Calling %q %s", "POST", routeURL)
req, err := r.reqFactory.NewRequest("POST", routeURL, nil)
if err != nil {
return "", err
}
if err := auth.Authorize(req); err != nil {
return "", err
}
res, _, err := r.doRequest(req)
if err != nil {
return "", err
}
if res.StatusCode != http.StatusAccepted {
if res.StatusCode == http.StatusUnauthorized {
return "", errLoginRequired
}
if res.StatusCode == http.StatusNotFound {
return "", ErrDoesNotExist
}
errBody, err := ioutil.ReadAll(res.Body)
if err != nil {
return "", err
}
log.Debugf("Unexpected response from server: %q %#v", errBody, res.Header)
return "", utils.NewHTTPRequestError(fmt.Sprintf("Server error: unexpected %d response status trying to initiate upload of %s", res.StatusCode, imageName), res)
}
if location = res.Header.Get("Location"); location == "" {
return "", fmt.Errorf("registry did not return a Location header for resumable blob upload for image %s", imageName)
}
return
}
// Finally Push the (signed) manifest of the blobs we've just pushed
func (r *Session) PutV2ImageManifest(ep *Endpoint, imageName, tagName string, manifestRdr io.Reader, auth *RequestAuthorization) (string, error) {
routeURL, err := getV2Builder(ep).BuildManifestURL(imageName, tagName)