79 lines
1.9 KiB
Go
79 lines
1.9 KiB
Go
// Copyright 2009 The Go Authors. All rights reserved.
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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.
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package http
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import (
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"bytes"
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"io"
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"io/ioutil"
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"os"
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)
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// One of the copies, say from b to r2, could be avoided by using a more
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// elaborate trick where the other copy is made during Request/Response.Write.
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// This would complicate things too much, given that these functions are for
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// debugging only.
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func drainBody(b io.ReadCloser) (r1, r2 io.ReadCloser, err os.Error) {
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var buf bytes.Buffer
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if _, err = buf.ReadFrom(b); err != nil {
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return nil, nil, err
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}
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if err = b.Close(); err != nil {
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return nil, nil, err
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}
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return ioutil.NopCloser(&buf), ioutil.NopCloser(bytes.NewBuffer(buf.Bytes())), nil
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}
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// DumpRequest returns the wire representation of req,
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// optionally including the request body, for debugging.
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// DumpRequest is semantically a no-op, but in order to
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// dump the body, it reads the body data into memory and
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// changes req.Body to refer to the in-memory copy.
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// The documentation for Request.Write details which fields
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// of req are used.
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func DumpRequest(req *Request, body bool) (dump []byte, err os.Error) {
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var b bytes.Buffer
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save := req.Body
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if !body || req.Body == nil {
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req.Body = nil
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} else {
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save, req.Body, err = drainBody(req.Body)
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if err != nil {
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return
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}
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}
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err = req.Write(&b)
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req.Body = save
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if err != nil {
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return
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}
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dump = b.Bytes()
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return
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}
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// DumpResponse is like DumpRequest but dumps a response.
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func DumpResponse(resp *Response, body bool) (dump []byte, err os.Error) {
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var b bytes.Buffer
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save := resp.Body
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savecl := resp.ContentLength
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if !body || resp.Body == nil {
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resp.Body = nil
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resp.ContentLength = 0
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} else {
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save, resp.Body, err = drainBody(resp.Body)
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if err != nil {
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return
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}
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}
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err = resp.Write(&b)
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resp.Body = save
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resp.ContentLength = savecl
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if err != nil {
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return
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}
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dump = b.Bytes()
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return
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}
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