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// Copyright 2019 Google LLC All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package transport
import (
"net/http"
"github.com/google/go-containerregistry/pkg/name"
)
type schemeTransport struct {
// Scheme we should use, determined by ping response.
scheme string
// Registry we're talking to.
registry name.Registry
// Wrapped by schemeTransport.
inner http.RoundTripper
}
// RoundTrip implements http.RoundTripper
func (st *schemeTransport) RoundTrip(in *http.Request) (*http.Response, error) {
// When we ping() the registry, we determine whether to use http or https
// based on which scheme was successful. That is only valid for the
// registry server and not e.g. a separate token server or blob storage,
// so we should only override the scheme if the host is the registry.
if matchesHost(st.registry.String(), in, st.scheme) {
in.URL.Scheme = st.scheme
}
return st.inner.RoundTrip(in)
}
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