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Add a CheckRedirect function to the HTTP client

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Use it to preserve Accept and Range headers that were added to the
original request.

Signed-off-by: Aaron Lehmann <aaron.lehmann@docker.com>
This commit is contained in:
Aaron Lehmann 2016-01-27 10:57:58 -08:00
parent a58b7625ba
commit 8e571dff41
1 changed files with 25 additions and 3 deletions
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28
docs/client/repository.go
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@ -27,6 +27,26 @@ type Registry interface {
Repositories(ctx context.Context, repos []string, last string) (n int, err error)
}
// checkHTTPRedirect is a callback that can manipulate redirected HTTP
// requests. It is used to preserve Accept and Range headers.
func checkHTTPRedirect(req *http.Request, via []*http.Request) error {
if len(via) >= 10 {
return errors.New("stopped after 10 redirects")
}
if len(via) > 0 {
for headerName, headerVals := range via[0].Header {
if headerName == "Accept" || headerName == "Range" {
for _, val := range headerVals {
req.Header.Add(headerName, val)
}
}
}
}
return nil
}
// NewRegistry creates a registry namespace which can be used to get a listing of repositories
func NewRegistry(ctx context.Context, baseURL string, transport http.RoundTripper) (Registry, error) {
ub, err := v2.NewURLBuilderFromString(baseURL)
@ -35,8 +55,9 @@ func NewRegistry(ctx context.Context, baseURL string, transport http.RoundTrippe
}
client := &http.Client{
Transport: transport,
Timeout: 1 * time.Minute,
Transport: transport,
Timeout: 1 * time.Minute,
CheckRedirect: checkHTTPRedirect,
}
return &registry{
@ -105,7 +126,8 @@ func NewRepository(ctx context.Context, name reference.Named, baseURL string, tr
}
client := &http.Client{
Transport: transport,
Transport: transport,
CheckRedirect: checkHTTPRedirect,
// TODO(dmcgowan): create cookie jar
}