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6718939a08
* cleanup * text * add errors * fixes * more * fixes * linnter * comments * name
68 lines
2.1 KiB
Go
68 lines
2.1 KiB
Go
// Copyright 2020 Security Scorecard Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package roundtripper
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import (
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"fmt"
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"net/http"
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"github.com/naveensrinivasan/httpcache"
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"go.opencensus.io/plugin/ochttp"
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opencensusstats "go.opencensus.io/stats"
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"go.opencensus.io/tag"
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sce "github.com/ossf/scorecard/v2/errors"
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"github.com/ossf/scorecard/v2/stats"
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)
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// MakeCensusTransport wraps input Roundtripper with monitoring logic.
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func MakeCensusTransport(innerTransport http.RoundTripper) http.RoundTripper {
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return &ochttp.Transport{
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Base: &censusTransport{
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innerTransport: innerTransport,
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},
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}
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}
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// censusTransport is a monitoring aware http.Transport.
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type censusTransport struct {
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innerTransport http.RoundTripper
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}
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// Roundtrip handles context update and measurement recording.
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func (ct *censusTransport) RoundTrip(r *http.Request) (*http.Response, error) {
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ctx, err := tag.New(r.Context(), tag.Upsert(stats.RequestTag, "requested"))
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if err != nil {
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//nolint:wrapcheck
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return nil, sce.Create(sce.ErrScorecardInternal, fmt.Sprintf("tag.New: %v", err))
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}
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r = r.WithContext(ctx)
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resp, err := ct.innerTransport.RoundTrip(r)
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if err != nil {
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//nolint:wrapcheck
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return nil, sce.Create(sce.ErrScorecardInternal, fmt.Sprintf("innerTransport.RoundTrip: %v", err))
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}
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if resp.Header.Get(httpcache.XFromCache) != "" {
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ctx, err = tag.New(ctx, tag.Upsert(stats.RequestTag, httpcache.XFromCache))
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if err != nil {
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//nolint:wrapcheck
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return nil, sce.Create(sce.ErrScorecardInternal, fmt.Sprintf("tag.New: %v", err))
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}
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}
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opencensusstats.Record(ctx, stats.HTTPRequests.M(1))
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return resp, nil
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}
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