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59 lines
1.3 KiB
59 lines
1.3 KiB
5 years ago
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// Copyright 2013 The Go Authors. All rights reserved.
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//
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file or at
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// https://developers.google.com/open-source/licenses/bsd.
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package httputil
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import (
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"bytes"
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"net/http"
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"strconv"
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)
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// ResponseBuffer is the current response being composed by its owner.
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// It implements http.ResponseWriter and io.WriterTo.
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type ResponseBuffer struct {
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buf bytes.Buffer
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status int
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header http.Header
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}
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// Write implements the http.ResponseWriter interface.
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func (rb *ResponseBuffer) Write(p []byte) (int, error) {
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return rb.buf.Write(p)
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}
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// WriteHeader implements the http.ResponseWriter interface.
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func (rb *ResponseBuffer) WriteHeader(status int) {
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rb.status = status
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}
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// Header implements the http.ResponseWriter interface.
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func (rb *ResponseBuffer) Header() http.Header {
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if rb.header == nil {
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rb.header = make(http.Header)
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}
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return rb.header
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}
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// WriteTo implements the io.WriterTo interface.
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func (rb *ResponseBuffer) WriteTo(w http.ResponseWriter) error {
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for k, v := range rb.header {
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w.Header()[k] = v
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}
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if rb.buf.Len() > 0 {
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w.Header().Set("Content-Length", strconv.Itoa(rb.buf.Len()))
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}
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if rb.status != 0 {
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w.WriteHeader(rb.status)
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}
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if rb.buf.Len() > 0 {
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if _, err := w.Write(rb.buf.Bytes()); err != nil {
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return err
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}
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}
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return nil
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}
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