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remotes/docker: implement seekable http requests

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To support resumable download, the fetcher for a remote must implement
`io.Seeker`. If implemented the `content.Copy` function will detect the
seeker and begin from where the download was terminated by a previous
attempt.

Signed-off-by: Stephen J Day <stephen.day@docker.com>
This commit is contained in:
Stephen J Day
2017-11-01 16:11:40 -07:00
committed by Michael Crosby
parent a9308e174d
commit 682151b166
4 changed files with 176 additions and 23 deletions
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2
remotes/docker/resolver.go
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@@ -298,7 +298,7 @@ func (r *dockerBase) authorize(req *http.Request) {
func (r *dockerBase) doRequest(ctx context.Context, req *http.Request) (*http.Response, error) {
ctx = log.WithLogger(ctx, log.G(ctx).WithField("url", req.URL.String()))
log.G(ctx).WithField("request.headers", req.Header).WithField("request.method", req.Method).Debug("Do request")
log.G(ctx).WithField("request.headers", req.Header).WithField("request.method", req.Method).Debug("do request")
r.authorize(req)
resp, err := ctxhttp.Do(ctx, r.client, req)
if err != nil {