mirror of https://github.com/perkeep/perkeep.git
98 lines
2.2 KiB
Go
98 lines
2.2 KiB
Go
/*
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Copyright 2011 Google Inc.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package httputil
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import (
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"io"
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"log"
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"net/http"
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"sync"
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"time"
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)
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// StatsTransport wraps another RoundTripper (or uses the default one) and
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// counts the number of HTTP requests performed.
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type StatsTransport struct {
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mu sync.Mutex
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reqs int
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// Transport optionally specifies the transport to use.
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// If nil, http.DefaultTransport is used.
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Transport http.RoundTripper
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// If VerboseLog is true, HTTP request summaries are logged.
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VerboseLog bool
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}
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func (t *StatsTransport) Requests() int {
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t.mu.Lock()
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defer t.mu.Unlock()
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return t.reqs
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}
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func (t *StatsTransport) RoundTrip(req *http.Request) (resp *http.Response, err error) {
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t.mu.Lock()
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t.reqs++
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n := t.reqs
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t.mu.Unlock()
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rt := t.Transport
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if rt == nil {
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rt = http.DefaultTransport
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}
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var t0 time.Time
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if t.VerboseLog {
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t0 = time.Now()
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log.Printf("(%d) %s %s ...", n, req.Method, req.URL)
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}
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resp, err = rt.RoundTrip(req)
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if t.VerboseLog {
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t1 := time.Now()
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td := t1.Sub(t1)
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if err == nil {
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log.Printf("(%d) %s %s = status %d (in %v)", n, req.Method, req.URL, resp.StatusCode, td)
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resp.Body = &logBody{body: resp.Body, n: n, t0: t0, t1: t1}
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} else {
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log.Printf("(%d) %s %s = error: %v (in %v)", n, req.Method, req.URL, err, td)
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}
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}
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return
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}
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type logBody struct {
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body io.ReadCloser
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n int
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t0, t1 time.Time
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readOnce sync.Once
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closeOnce sync.Once
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}
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func (b *logBody) Read(p []byte) (n int, err error) {
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b.readOnce.Do(func() {
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log.Printf("(%d) Read body", b.n)
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})
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return b.body.Read(p)
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}
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func (b *logBody) Close() error {
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b.closeOnce.Do(func() {
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t := time.Now()
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log.Printf("(%d) Close body (%v tot, %v post-header)", b.n, t.Sub(b.t0), t.Sub(b.t1))
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})
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return b.body.Close()
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}
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