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http: check explicit wrong Request.ContentLength values

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R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5070041
This commit is contained in:
Brad Fitzpatrick 2011-09-19 09:01:32 -07:00
parent 5edf5197e0
commit 48ff4a849c
2 changed files with 113 additions and 9 deletions
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99
src/pkg/http/requestwrite_test.go
View File

@ -16,10 +16,11 @@ import (
)
type reqWriteTest struct {
Req Request
Body interface{} // optional []byte or func() io.ReadCloser to populate Req.Body
Raw string
RawProxy string
Req Request
Body interface{} // optional []byte or func() io.ReadCloser to populate Req.Body
Raw string
RawProxy string
WantError os.Error
}
var reqWriteTests = []reqWriteTest{
@ -78,6 +79,8 @@ var reqWriteTests = []reqWriteTest{
"Accept-Language: en-us,en;q=0.5\r\n" +
"Keep-Alive: 300\r\n" +
"Proxy-Connection: keep-alive\r\n\r\n",
nil,
},
// HTTP/1.1 => chunked coding; body; empty trailer
{
@ -107,6 +110,8 @@ var reqWriteTests = []reqWriteTest{
"User-Agent: Go http package\r\n" +
"Transfer-Encoding: chunked\r\n\r\n" +
chunk("abcdef") + chunk(""),
nil,
},
// HTTP/1.1 POST => chunked coding; body; empty trailer
{
@ -139,6 +144,8 @@ var reqWriteTests = []reqWriteTest{
"Connection: close\r\n" +
"Transfer-Encoding: chunked\r\n\r\n" +
chunk("abcdef") + chunk(""),
nil,
},
// HTTP/1.1 POST with Content-Length, no chunking
@ -174,6 +181,8 @@ var reqWriteTests = []reqWriteTest{
"Content-Length: 6\r\n" +
"\r\n" +
"abcdef",
nil,
},
// HTTP/1.1 POST with Content-Length in headers
@ -203,6 +212,8 @@ var reqWriteTests = []reqWriteTest{
"Content-Length: 6\r\n" +
"\r\n" +
"abcdef",
nil,
},
// default to HTTP/1.1
@ -225,6 +236,8 @@ var reqWriteTests = []reqWriteTest{
"Host: www.google.com\r\n" +
"User-Agent: Go http package\r\n" +
"\r\n",
nil,
},
// Request with a 0 ContentLength and a 0 byte body.
@ -249,6 +262,8 @@ var reqWriteTests = []reqWriteTest{
"Host: example.com\r\n" +
"User-Agent: Go http package\r\n" +
"\r\n",
nil,
},
// Request with a 0 ContentLength and a 1 byte body.
@ -275,6 +290,74 @@ var reqWriteTests = []reqWriteTest{
"User-Agent: Go http package\r\n" +
"Transfer-Encoding: chunked\r\n\r\n" +
chunk("x") + chunk(""),
nil,
},
// Request with a ContentLength of 10 but a 5 byte body.
{
Request{
Method: "POST",
RawURL: "/",
Host: "example.com",
ProtoMajor: 1,
ProtoMinor: 1,
ContentLength: 10, // but we're going to send only 5 bytes
},
[]byte("12345"),
"", // ignored
"", // ignored
os.NewError("http: Request.ContentLength=10 with Body length 5"),
},
// Request with a ContentLength of 4 but an 8 byte body.
{
Request{
Method: "POST",
RawURL: "/",
Host: "example.com",
ProtoMajor: 1,
ProtoMinor: 1,
ContentLength: 4, // but we're going to try to send 8 bytes
},
[]byte("12345678"),
"", // ignored
"", // ignored
os.NewError("http: Request.ContentLength=4 with Body length 8"),
},
// Request with a 5 ContentLength and nil body.
{
Request{
Method: "POST",
RawURL: "/",
Host: "example.com",
ProtoMajor: 1,
ProtoMinor: 1,
ContentLength: 5, // but we'll omit the body
},
nil, // missing body
"POST / HTTP/1.1\r\n" +
"Host: example.com\r\n" +
"User-Agent: Go http package\r\n" +
"Content-Length: 5\r\n\r\n" +
"",
"POST / HTTP/1.1\r\n" +
"Host: example.com\r\n" +
"User-Agent: Go http package\r\n" +
"Content-Length: 5\r\n\r\n" +
"",
os.NewError("http: Request.ContentLength=5 with nil Body"),
},
}
@ -298,10 +381,14 @@ func TestRequestWrite(t *testing.T) {
}
var braw bytes.Buffer
err := tt.Req.Write(&braw)
if err != nil {
t.Errorf("error writing #%d: %s", i, err)
if g, e := fmt.Sprintf("%v", err), fmt.Sprintf("%v", tt.WantError); g != e {
t.Errorf("writing #%d, err = %q, want %q", i, g, e)
continue
}
if err != nil {
continue
}
sraw := braw.String()
if sraw != tt.Raw {
t.Errorf("Test %d, expecting:\n%s\nGot:\n%s\n", i, tt.Raw, sraw)

23
src/pkg/http/transfer.go
View File

@ -7,6 +7,7 @@ package http
import (
"bytes"
"bufio"
"fmt"
"io"
"io/ioutil"
"os"
@ -21,7 +22,7 @@ type transferWriter struct {
Body io.Reader
BodyCloser io.Closer
ResponseToHEAD bool
ContentLength int64
ContentLength int64 // -1 means unknown, 0 means exactly none
Close bool
TransferEncoding []string
Trailer Header
@ -34,6 +35,10 @@ func newTransferWriter(r interface{}) (t *transferWriter, err os.Error) {
atLeastHTTP11 := false
switch rr := r.(type) {
case *Request:
if rr.ContentLength != 0 && rr.Body == nil {
return nil, fmt.Errorf("http: Request.ContentLength=%d with nil Body", rr.ContentLength)
}
t.Body = rr.Body
t.BodyCloser = rr.Body
t.ContentLength = rr.ContentLength
@ -154,6 +159,8 @@ func (t *transferWriter) WriteHeader(w io.Writer) (err os.Error) {
}
func (t *transferWriter) WriteBody(w io.Writer) (err os.Error) {
var ncopy int64
// Write body
if t.Body != nil {
if chunked(t.TransferEncoding) {
@ -163,9 +170,14 @@ func (t *transferWriter) WriteBody(w io.Writer) (err os.Error) {
err = cw.Close()
}
} else if t.ContentLength == -1 {
_, err = io.Copy(w, t.Body)
ncopy, err = io.Copy(w, t.Body)
} else {
_, err = io.Copy(w, io.LimitReader(t.Body, t.ContentLength))
ncopy, err = io.Copy(w, io.LimitReader(t.Body, t.ContentLength))
nextra, err := io.Copy(ioutil.Discard, t.Body)
if err != nil {
return err
}
ncopy += nextra
}
if err != nil {
return err
@ -175,6 +187,11 @@ func (t *transferWriter) WriteBody(w io.Writer) (err os.Error) {
}
}
if t.ContentLength != -1 && t.ContentLength != ncopy {
return fmt.Errorf("http: Request.ContentLength=%d with Body length %d",
t.ContentLength, ncopy)
}
// TODO(petar): Place trailer writer code here.
if chunked(t.TransferEncoding) {
// Last chunk, empty trailer