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[release-branch.go1.2] net/http/httputil: fix DumpRequestOut with ContentLength & false body param

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««« CL 14920050 / 5ed8c82778ae
net/http/httputil: fix DumpRequestOut with ContentLength & false body param

Fixes #6471

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/14920050
»»»

R=golang-dev
CC=golang-dev
https://golang.org/cl/20590044
This commit is contained in:
Andrew Gerrand 2013-11-01 11:27:19 +11:00
parent a4085fdf10
commit 71b3aca9fa
2 changed files with 55 additions and 3 deletions
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28
src/pkg/net/http/httputil/dump.go
View File

@ -45,13 +45,27 @@ func (c *dumpConn) SetDeadline(t time.Time) error { return nil }
func (c *dumpConn) SetReadDeadline(t time.Time) error { return nil }
func (c *dumpConn) SetWriteDeadline(t time.Time) error { return nil }
type neverEnding byte
func (b neverEnding) Read(p []byte) (n int, err error) {
for i := range p {
p[i] = byte(b)
}
return len(p), nil
}
// DumpRequestOut is like DumpRequest but includes
// headers that the standard http.Transport adds,
// such as User-Agent.
func DumpRequestOut(req *http.Request, body bool) ([]byte, error) {
save := req.Body
dummyBody := false
if !body || req.Body == nil {
req.Body = nil
if req.ContentLength != 0 {
req.Body = ioutil.NopCloser(io.LimitReader(neverEnding('x'), req.ContentLength))
dummyBody = true
}
} else {
var err error
save, req.Body, err = drainBody(req.Body)
@ -99,7 +113,19 @@ func DumpRequestOut(req *http.Request, body bool) ([]byte, error) {
if err != nil {
return nil, err
}
return buf.Bytes(), nil
dump := buf.Bytes()
// If we used a dummy body above, remove it now.
// TODO: if the req.ContentLength is large, we allocate memory
// unnecessarily just to slice it off here. But this is just
// a debug function, so this is acceptable for now. We could
// discard the body earlier if this matters.
if dummyBody {
if i := bytes.Index(dump, []byte("\r\n\r\n")); i >= 0 {
dump = dump[:i+4]
}
}
return dump, nil
}
// delegateReader is a reader that delegates to another reader,

30
src/pkg/net/http/httputil/dump_test.go
View File

@ -20,6 +20,7 @@ type dumpTest struct {
WantDump string
WantDumpOut string
NoBody bool // if true, set DumpRequest{,Out} body to false
}
var dumpTests = []dumpTest{
@ -83,6 +84,31 @@ var dumpTests = []dumpTest{
"User-Agent: Go 1.1 package http\r\n" +
"Accept-Encoding: gzip\r\n\r\n",
},
// Request with Body, but Dump requested without it.
{
Req: http.Request{
Method: "POST",
URL: &url.URL{
Scheme: "http",
Host: "post.tld",
Path: "/",
},
ContentLength: 6,
ProtoMajor: 1,
ProtoMinor: 1,
},
Body: []byte("abcdef"),
WantDumpOut: "POST / HTTP/1.1\r\n" +
"Host: post.tld\r\n" +
"User-Agent: Go 1.1 package http\r\n" +
"Content-Length: 6\r\n" +
"Accept-Encoding: gzip\r\n\r\n",
NoBody: true,
},
}
func TestDumpRequest(t *testing.T) {
@ -105,7 +131,7 @@ func TestDumpRequest(t *testing.T) {
if tt.WantDump != "" {
setBody()
dump, err := DumpRequest(&tt.Req, true)
dump, err := DumpRequest(&tt.Req, !tt.NoBody)
if err != nil {
t.Errorf("DumpRequest #%d: %s", i, err)
continue
@ -118,7 +144,7 @@ func TestDumpRequest(t *testing.T) {
if tt.WantDumpOut != "" {
setBody()
dump, err := DumpRequestOut(&tt.Req, true)
dump, err := DumpRequestOut(&tt.Req, !tt.NoBody)
if err != nil {
t.Errorf("DumpRequestOut #%d: %s", i, err)
continue