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// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package http
import (
"bufio"
"bytes"
"compress/gzip"
"crypto/rand"
"fmt"
"go/ast"
"io"
"io/ioutil"
"net/http/internal"
"net/url"
"reflect"
"regexp"
"strings"
"testing"
)
type respTest struct {
Raw string
Resp Response
Body string
}
func dummyReq(method string) *Request {
return &Request{Method: method}
}
func dummyReq11(method string) *Request {
return &Request{Method: method, Proto: "HTTP/1.1", ProtoMajor: 1, ProtoMinor: 1}
}
var respTests = []respTest{
// Unchunked response without Content-Length.
{
"HTTP/1.0 200 OK\r\n" +
"Connection: close\r\n" +
"\r\n" +
"Body here\n",
Response{
Status: "200 OK",
StatusCode: 200,
Proto: "HTTP/1.0",
ProtoMajor: 1,
ProtoMinor: 0,
Request: dummyReq("GET"),
Header: Header{
"Connection": {"close"}, // TODO(rsc): Delete?
},
Close: true,
ContentLength: -1,
},
"Body here\n",
},
// Unchunked HTTP/1.1 response without Content-Length or
// Connection headers.
{
"HTTP/1.1 200 OK\r\n" +
"\r\n" +
"Body here\n",
Response{
Status: "200 OK",
StatusCode: 200,
Proto: "HTTP/1.1",
ProtoMajor: 1,
ProtoMinor: 1,
Header: Header{},
Request: dummyReq("GET"),
Close: true,
ContentLength: -1,
},
"Body here\n",
},
// Unchunked HTTP/1.1 204 response without Content-Length.
{
"HTTP/1.1 204 No Content\r\n" +
"\r\n" +
"Body should not be read!\n",
Response{
Status: "204 No Content",
StatusCode: 204,
Proto: "HTTP/1.1",
ProtoMajor: 1,
ProtoMinor: 1,
Header: Header{},
Request: dummyReq("GET"),
Close: false,
ContentLength: 0,
},
"",
},
// Unchunked response with Content-Length.
{
"HTTP/1.0 200 OK\r\n" +
"Content-Length: 10\r\n" +
"Connection: close\r\n" +
"\r\n" +
"Body here\n",
Response{
Status: "200 OK",
StatusCode: 200,
Proto: "HTTP/1.0",
ProtoMajor: 1,
ProtoMinor: 0,
Request: dummyReq("GET"),
Header: Header{
"Connection": {"close"},
"Content-Length": {"10"},
},
Close: true,
ContentLength: 10,
},
"Body here\n",
},
// Chunked response without Content-Length.
{
"HTTP/1.1 200 OK\r\n" +
"Transfer-Encoding: chunked\r\n" +
"\r\n" +
"0a\r\n" +
"Body here\n\r\n" +
"09\r\n" +
"continued\r\n" +
"0\r\n" +
"\r\n",
Response{
Status: "200 OK",
StatusCode: 200,
Proto: "HTTP/1.1",
ProtoMajor: 1,
ProtoMinor: 1,
Request: dummyReq("GET"),
Header: Header{},
Close: false,
ContentLength: -1,
TransferEncoding: []string{"chunked"},
},
"Body here\ncontinued",
},
// Chunked response with Content-Length.
{
"HTTP/1.1 200 OK\r\n" +
"Transfer-Encoding: chunked\r\n" +
"Content-Length: 10\r\n" +
"\r\n" +
"0a\r\n" +
"Body here\n\r\n" +
"0\r\n" +
"\r\n",
Response{
Status: "200 OK",
StatusCode: 200,
Proto: "HTTP/1.1",
ProtoMajor: 1,
ProtoMinor: 1,
Request: dummyReq("GET"),
Header: Header{},
Close: false,
ContentLength: -1,
TransferEncoding: []string{"chunked"},
},
"Body here\n",
},
// Chunked response in response to a HEAD request
{
"HTTP/1.1 200 OK\r\n" +
"Transfer-Encoding: chunked\r\n" +
"\r\n",
Response{
Status: "200 OK",
StatusCode: 200,
Proto: "HTTP/1.1",
ProtoMajor: 1,
ProtoMinor: 1,
Request: dummyReq("HEAD"),
Header: Header{},
TransferEncoding: []string{"chunked"},
Close: false,
ContentLength: -1,
},
"",
},
// Content-Length in response to a HEAD request
{
"HTTP/1.0 200 OK\r\n" +
"Content-Length: 256\r\n" +
"\r\n",
Response{
Status: "200 OK",
StatusCode: 200,
Proto: "HTTP/1.0",
ProtoMajor: 1,
ProtoMinor: 0,
Request: dummyReq("HEAD"),
Header: Header{"Content-Length": {"256"}},
TransferEncoding: nil,
Close: true,
ContentLength: 256,
},
"",
},
// Content-Length in response to a HEAD request with HTTP/1.1
{
"HTTP/1.1 200 OK\r\n" +
"Content-Length: 256\r\n" +
"\r\n",
Response{
Status: "200 OK",
StatusCode: 200,
Proto: "HTTP/1.1",
ProtoMajor: 1,
ProtoMinor: 1,
Request: dummyReq("HEAD"),
Header: Header{"Content-Length": {"256"}},
TransferEncoding: nil,
Close: false,
ContentLength: 256,
},
"",
},
// No Content-Length or Chunked in response to a HEAD request
{
"HTTP/1.0 200 OK\r\n" +
"\r\n",
Response{
Status: "200 OK",
StatusCode: 200,
Proto: "HTTP/1.0",
ProtoMajor: 1,
ProtoMinor: 0,
Request: dummyReq("HEAD"),
Header: Header{},
TransferEncoding: nil,
Close: true,
ContentLength: -1,
},
"",
},
// explicit Content-Length of 0.
{
"HTTP/1.1 200 OK\r\n" +
"Content-Length: 0\r\n" +
"\r\n",
Response{
Status: "200 OK",
StatusCode: 200,
Proto: "HTTP/1.1",
ProtoMajor: 1,
ProtoMinor: 1,
Request: dummyReq("GET"),
Header: Header{
"Content-Length": {"0"},
},
Close: false,
ContentLength: 0,
},
"",
},
// Status line without a Reason-Phrase, but trailing space.
// (permitted by RFC 2616)
{
"HTTP/1.0 303 \r\n\r\n",
Response{
Status: "303 ",
StatusCode: 303,
Proto: "HTTP/1.0",
ProtoMajor: 1,
ProtoMinor: 0,
Request: dummyReq("GET"),
Header: Header{},
Close: true,
ContentLength: -1,
},
"",
},
// Status line without a Reason-Phrase, and no trailing space.
// (not permitted by RFC 2616, but we'll accept it anyway)
{
"HTTP/1.0 303\r\n\r\n",
Response{
Status: "303",
StatusCode: 303,
Proto: "HTTP/1.0",
ProtoMajor: 1,
ProtoMinor: 0,
Request: dummyReq("GET"),
Header: Header{},
Close: true,
ContentLength: -1,
},
"",
},
// golang.org/issue/4767: don't special-case multipart/byteranges responses
{
`HTTP/1.1 206 Partial Content
Connection: close
Content-Type: multipart/byteranges; boundary=18a75608c8f47cef
some body`,
Response{
Status: "206 Partial Content",
StatusCode: 206,
Proto: "HTTP/1.1",
ProtoMajor: 1,
ProtoMinor: 1,
Request: dummyReq("GET"),
Header: Header{
"Content-Type": []string{"multipart/byteranges; boundary=18a75608c8f47cef"},
},
Close: true,
ContentLength: -1,
},
"some body",
},
// Unchunked response without Content-Length, Request is nil
{
"HTTP/1.0 200 OK\r\n" +
"Connection: close\r\n" +
"\r\n" +
"Body here\n",
Response{
Status: "200 OK",
StatusCode: 200,
Proto: "HTTP/1.0",
ProtoMajor: 1,
ProtoMinor: 0,
Header: Header{
"Connection": {"close"}, // TODO(rsc): Delete?
},
Close: true,
ContentLength: -1,
},
"Body here\n",
},
// 206 Partial Content. golang.org/issue/8923
{
"HTTP/1.1 206 Partial Content\r\n" +
"Content-Type: text/plain; charset=utf-8\r\n" +
"Accept-Ranges: bytes\r\n" +
"Content-Range: bytes 0-5/1862\r\n" +
"Content-Length: 6\r\n\r\n" +
"foobar",
Response{
Status: "206 Partial Content",
StatusCode: 206,
Proto: "HTTP/1.1",
ProtoMajor: 1,
ProtoMinor: 1,
Request: dummyReq("GET"),
Header: Header{
"Accept-Ranges": []string{"bytes"},
"Content-Length": []string{"6"},
"Content-Type": []string{"text/plain; charset=utf-8"},
"Content-Range": []string{"bytes 0-5/1862"},
},
ContentLength: 6,
},
"foobar",
},
// Both keep-alive and close, on the same Connection line. (Issue 8840)
{
"HTTP/1.1 200 OK\r\n" +
"Content-Length: 256\r\n" +
"Connection: keep-alive, close\r\n" +
"\r\n",
Response{
Status: "200 OK",
StatusCode: 200,
Proto: "HTTP/1.1",
ProtoMajor: 1,
ProtoMinor: 1,
Request: dummyReq("HEAD"),
Header: Header{
"Content-Length": {"256"},
},
TransferEncoding: nil,
Close: true,
ContentLength: 256,
},
"",
},
// Both keep-alive and close, on different Connection lines. (Issue 8840)
{
"HTTP/1.1 200 OK\r\n" +
"Content-Length: 256\r\n" +
"Connection: keep-alive\r\n" +
"Connection: close\r\n" +
"\r\n",
Response{
Status: "200 OK",
StatusCode: 200,
Proto: "HTTP/1.1",
ProtoMajor: 1,
ProtoMinor: 1,
Request: dummyReq("HEAD"),
Header: Header{
"Content-Length": {"256"},
},
TransferEncoding: nil,
Close: true,
ContentLength: 256,
},
"",
},
// Issue 12785: HTTP/1.0 response with bogus (to be ignored) Transfer-Encoding.
// Without a Content-Length.
{
"HTTP/1.0 200 OK\r\n" +
"Transfer-Encoding: bogus\r\n" +
"\r\n" +
"Body here\n",
Response{
Status: "200 OK",
StatusCode: 200,
Proto: "HTTP/1.0",
ProtoMajor: 1,
ProtoMinor: 0,
Request: dummyReq("GET"),
Header: Header{},
Close: true,
ContentLength: -1,
},
"Body here\n",
},
// Issue 12785: HTTP/1.0 response with bogus (to be ignored) Transfer-Encoding.
// With a Content-Length.
{
"HTTP/1.0 200 OK\r\n" +
"Transfer-Encoding: bogus\r\n" +
"Content-Length: 10\r\n" +
"\r\n" +
"Body here\n",
Response{
Status: "200 OK",
StatusCode: 200,
Proto: "HTTP/1.0",
ProtoMajor: 1,
ProtoMinor: 0,
Request: dummyReq("GET"),
Header: Header{
"Content-Length": {"10"},
},
Close: true,
ContentLength: 10,
},
"Body here\n",
},
{
"HTTP/1.1 200 OK\r\n" +
"Content-Encoding: gzip\r\n" +
"Content-Length: 23\r\n" +
"Connection: keep-alive\r\n" +
"Keep-Alive: timeout=7200\r\n\r\n" +
"\x1f\x8b\b\x00\x00\x00\x00\x00\x00\x00s\xf3\xf7\a\x00\xab'\xd4\x1a\x03\x00\x00\x00",
Response{
Status: "200 OK",
StatusCode: 200,
Proto: "HTTP/1.1",
ProtoMajor: 1,
ProtoMinor: 1,
Request: dummyReq("GET"),
Header: Header{
"Content-Length": {"23"},
"Content-Encoding": {"gzip"},
"Connection": {"keep-alive"},
"Keep-Alive": {"timeout=7200"},
},
Close: false,
ContentLength: 23,
},
"\x1f\x8b\b\x00\x00\x00\x00\x00\x00\x00s\xf3\xf7\a\x00\xab'\xd4\x1a\x03\x00\x00\x00",
},
// Issue 19989: two spaces between HTTP version and status.
{
"HTTP/1.0 401 Unauthorized\r\n" +
"Content-type: text/html\r\n" +
"WWW-Authenticate: Basic realm=\"\"\r\n\r\n" +
"Your Authentication failed.\r\n",
Response{
Status: "401 Unauthorized",
StatusCode: 401,
Proto: "HTTP/1.0",
ProtoMajor: 1,
ProtoMinor: 0,
Request: dummyReq("GET"),
Header: Header{
"Content-Type": {"text/html"},
"Www-Authenticate": {`Basic realm=""`},
},
Close: true,
ContentLength: -1,
},
"Your Authentication failed.\r\n",
},
}
// tests successful calls to ReadResponse, and inspects the returned Response.
// For error cases, see TestReadResponseErrors below.
func TestReadResponse(t *testing.T) {
for i, tt := range respTests {
resp, err := ReadResponse(bufio.NewReader(strings.NewReader(tt.Raw)), tt.Resp.Request)
if err != nil {
t.Errorf("#%d: %v", i, err)
continue
}
rbody := resp.Body
resp.Body = nil
diff(t, fmt.Sprintf("#%d Response", i), resp, &tt.Resp)
var bout bytes.Buffer
if rbody != nil {
_, err = io.Copy(&bout, rbody)
if err != nil {
t.Errorf("#%d: %v", i, err)
continue
}
rbody.Close()
}
body := bout.String()
if body != tt.Body {
t.Errorf("#%d: Body = %q want %q", i, body, tt.Body)
}
}
}
func TestWriteResponse(t *testing.T) {
for i, tt := range respTests {
resp, err := ReadResponse(bufio.NewReader(strings.NewReader(tt.Raw)), tt.Resp.Request)
if err != nil {
t.Errorf("#%d: %v", i, err)
continue
}
err = resp.Write(ioutil.Discard)
if err != nil {
t.Errorf("#%d: %v", i, err)
continue
}
}
}
var readResponseCloseInMiddleTests = []struct {
chunked, compressed bool
}{
{false, false},
{true, false},
{true, true},
}
// TestReadResponseCloseInMiddle tests that closing a body after
// reading only part of its contents advances the read to the end of
// the request, right up until the next request.
func TestReadResponseCloseInMiddle(t *testing.T) {
t.Parallel()
for _, test := range readResponseCloseInMiddleTests {
fatalf := func(format string, args ...interface{}) {
args = append([]interface{}{test.chunked, test.compressed}, args...)
t.Fatalf("on test chunked=%v, compressed=%v: "+format, args...)
}
checkErr := func(err error, msg string) {
if err == nil {
return
}
fatalf(msg+": %v", err)
}
var buf bytes.Buffer
buf.WriteString("HTTP/1.1 200 OK\r\n")
if test.chunked {
buf.WriteString("Transfer-Encoding: chunked\r\n")
} else {
buf.WriteString("Content-Length: 1000000\r\n")
}
var wr io.Writer = &buf
if test.chunked {
wr = internal.NewChunkedWriter(wr)
}
if test.compressed {
buf.WriteString("Content-Encoding: gzip\r\n")
wr = gzip.NewWriter(wr)
}
buf.WriteString("\r\n")
chunk := bytes.Repeat([]byte{'x'}, 1000)
for i := 0; i < 1000; i++ {
if test.compressed {
// Otherwise this compresses too well.
_, err := io.ReadFull(rand.Reader, chunk)
checkErr(err, "rand.Reader ReadFull")
}
wr.Write(chunk)
}
if test.compressed {
err := wr.(*gzip.Writer).Close()
checkErr(err, "compressor close")
}
if test.chunked {
buf.WriteString("0\r\n\r\n")
}
buf.WriteString("Next Request Here")
bufr := bufio.NewReader(&buf)
resp, err := ReadResponse(bufr, dummyReq("GET"))
checkErr(err, "ReadResponse")
expectedLength := int64(-1)
if !test.chunked {
expectedLength = 1000000
}
if resp.ContentLength != expectedLength {
fatalf("expected response length %d, got %d", expectedLength, resp.ContentLength)
}
if resp.Body == nil {
fatalf("nil body")
}
if test.compressed {
gzReader, err := gzip.NewReader(resp.Body)
checkErr(err, "gzip.NewReader")
resp.Body = &readerAndCloser{gzReader, resp.Body}
}
rbuf := make([]byte, 2500)
n, err := io.ReadFull(resp.Body, rbuf)
checkErr(err, "2500 byte ReadFull")
if n != 2500 {
fatalf("ReadFull only read %d bytes", n)
}
if test.compressed == false && !bytes.Equal(bytes.Repeat([]byte{'x'}, 2500), rbuf) {
fatalf("ReadFull didn't read 2500 'x'; got %q", string(rbuf))
}
resp.Body.Close()
rest, err := ioutil.ReadAll(bufr)
checkErr(err, "ReadAll on remainder")
if e, g := "Next Request Here", string(rest); e != g {
g = regexp.MustCompile(`(xx+)`).ReplaceAllStringFunc(g, func(match string) string {
return fmt.Sprintf("x(repeated x%d)", len(match))
})
fatalf("remainder = %q, expected %q", g, e)
}
}
}
func diff(t *testing.T, prefix string, have, want interface{}) {
hv := reflect.ValueOf(have).Elem()
wv := reflect.ValueOf(want).Elem()
if hv.Type() != wv.Type() {
t.Errorf("%s: type mismatch %v want %v", prefix, hv.Type(), wv.Type())
}
for i := 0; i < hv.NumField(); i++ {
name := hv.Type().Field(i).Name
if !ast.IsExported(name) {
continue
}
hf := hv.Field(i).Interface()
wf := wv.Field(i).Interface()
if !reflect.DeepEqual(hf, wf) {
t.Errorf("%s: %s = %v want %v", prefix, name, hf, wf)
}
}
}
type responseLocationTest struct {
location string // Response's Location header or ""
requrl string // Response.Request.URL or ""
want string
wantErr error
}
var responseLocationTests = []responseLocationTest{
{"/foo", "http://bar.com/baz", "http://bar.com/foo", nil},
{"http://foo.com/", "http://bar.com/baz", "http://foo.com/", nil},
{"", "http://bar.com/baz", "", ErrNoLocation},
{"/bar", "", "/bar", nil},
}
func TestLocationResponse(t *testing.T) {
for i, tt := range responseLocationTests {
res := new(Response)
res.Header = make(Header)
res.Header.Set("Location", tt.location)
if tt.requrl != "" {
res.Request = &Request{}
var err error
res.Request.URL, err = url.Parse(tt.requrl)
if err != nil {
t.Fatalf("bad test URL %q: %v", tt.requrl, err)
}
}
got, err := res.Location()
if tt.wantErr != nil {
if err == nil {
t.Errorf("%d. err=nil; want %q", i, tt.wantErr)
continue
}
if g, e := err.Error(), tt.wantErr.Error(); g != e {
t.Errorf("%d. err=%q; want %q", i, g, e)
continue
}
continue
}
if err != nil {
t.Errorf("%d. err=%q", i, err)
continue
}
if g, e := got.String(), tt.want; g != e {
t.Errorf("%d. Location=%q; want %q", i, g, e)
}
}
}
func TestResponseStatusStutter(t *testing.T) {
r := &Response{
Status: "123 some status",
StatusCode: 123,
ProtoMajor: 1,
ProtoMinor: 3,
}
var buf bytes.Buffer
r.Write(&buf)
if strings.Contains(buf.String(), "123 123") {
t.Errorf("stutter in status: %s", buf.String())
}
}
func TestResponseContentLengthShortBody(t *testing.T) {
const shortBody = "Short body, not 123 bytes."
br := bufio.NewReader(strings.NewReader("HTTP/1.1 200 OK\r\n" +
"Content-Length: 123\r\n" +
"\r\n" +
shortBody))
res, err := ReadResponse(br, &Request{Method: "GET"})
if err != nil {
t.Fatal(err)
}
if res.ContentLength != 123 {
t.Fatalf("Content-Length = %d; want 123", res.ContentLength)
}
var buf bytes.Buffer
n, err := io.Copy(&buf, res.Body)
if n != int64(len(shortBody)) {
t.Errorf("Copied %d bytes; want %d, len(%q)", n, len(shortBody), shortBody)
}
if buf.String() != shortBody {
t.Errorf("Read body %q; want %q", buf.String(), shortBody)
}
if err != io.ErrUnexpectedEOF {
t.Errorf("io.Copy error = %#v; want io.ErrUnexpectedEOF", err)
}
}
// Test various ReadResponse error cases. (also tests success cases, but mostly
// it's about errors). This does not test anything involving the bodies. Only
// the return value from ReadResponse itself.
func TestReadResponseErrors(t *testing.T) {
type testCase struct {
name string // optional, defaults to in
in string
wantErr interface{} // nil, err value, or string substring
}
status := func(s string, wantErr interface{}) testCase {
if wantErr == true {
wantErr = "malformed HTTP status code"
}
return testCase{
name: fmt.Sprintf("status %q", s),
in: "HTTP/1.1 " + s + "\r\nFoo: bar\r\n\r\n",
wantErr: wantErr,
}
}
version := func(s string, wantErr interface{}) testCase {
if wantErr == true {
wantErr = "malformed HTTP version"
}
return testCase{
name: fmt.Sprintf("version %q", s),
in: s + " 200 OK\r\n\r\n",
wantErr: wantErr,
}
}
contentLength := func(status, body string, wantErr interface{}) testCase {
return testCase{
name: fmt.Sprintf("status %q %q", status, body),
in: fmt.Sprintf("HTTP/1.1 %s\r\n%s", status, body),
wantErr: wantErr,
}
}
errMultiCL := "message cannot contain multiple Content-Length headers"
tests := []testCase{
{"", "", io.ErrUnexpectedEOF},
{"", "HTTP/1.1 301 Moved Permanently\r\nFoo: bar", io.ErrUnexpectedEOF},
{"", "HTTP/1.1", "malformed HTTP response"},
{"", "HTTP/2.0", "malformed HTTP response"},
status("20X Unknown", true),
status("abcd Unknown", true),
status("二百/两百 OK", true),
status(" Unknown", true),
status("c8 OK", true),
status("0x12d Moved Permanently", true),
status("200 OK", nil),
status("000 OK", nil),
status("001 OK", nil),
status("404 NOTFOUND", nil),
status("20 OK", true),
status("00 OK", true),
status("-10 OK", true),
status("1000 OK", true),
status("999 Done", nil),
status("-1 OK", true),
status("-200 OK", true),
version("HTTP/1.2", nil),
version("HTTP/2.0", nil),
version("HTTP/1.100000000002", true),
version("HTTP/1.-1", true),
version("HTTP/A.B", true),
version("HTTP/1", true),
version("http/1.1", true),
contentLength("200 OK", "Content-Length: 10\r\nContent-Length: 7\r\n\r\nGopher hey\r\n", errMultiCL),
contentLength("200 OK", "Content-Length: 7\r\nContent-Length: 7\r\n\r\nGophers\r\n", nil),
contentLength("201 OK", "Content-Length: 0\r\nContent-Length: 7\r\n\r\nGophers\r\n", errMultiCL),
contentLength("300 OK", "Content-Length: 0\r\nContent-Length: 0 \r\n\r\nGophers\r\n", nil),
contentLength("200 OK", "Content-Length:\r\nContent-Length:\r\n\r\nGophers\r\n", nil),
contentLength("206 OK", "Content-Length:\r\nContent-Length: 0 \r\nConnection: close\r\n\r\nGophers\r\n", errMultiCL),
// multiple content-length headers for 204 and 304 should still be checked
contentLength("204 OK", "Content-Length: 7\r\nContent-Length: 8\r\n\r\n", errMultiCL),
contentLength("204 OK", "Content-Length: 3\r\nContent-Length: 3\r\n\r\n", nil),
contentLength("304 OK", "Content-Length: 880\r\nContent-Length: 1\r\n\r\n", errMultiCL),
contentLength("304 OK", "Content-Length: 961\r\nContent-Length: 961\r\n\r\n", nil),
// golang.org/issue/22464
{"leading space in header", "HTTP/1.1 200 OK\r\n Content-type: text/html\r\nFoo: bar\r\n\r\n", "malformed MIME"},
{"leading tab in header", "HTTP/1.1 200 OK\r\n\tContent-type: text/html\r\nFoo: bar\r\n\r\n", "malformed MIME"},
}
for i, tt := range tests {
br := bufio.NewReader(strings.NewReader(tt.in))
_, rerr := ReadResponse(br, nil)
if err := matchErr(rerr, tt.wantErr); err != nil {
name := tt.name
if name == "" {
name = fmt.Sprintf("%d. input %q", i, tt.in)
}
t.Errorf("%s: %v", name, err)
}
}
}
// wantErr can be nil, an error value to match exactly, or type string to
// match a substring.
func matchErr(err error, wantErr interface{}) error {
if err == nil {
if wantErr == nil {
return nil
}
if sub, ok := wantErr.(string); ok {
return fmt.Errorf("unexpected success; want error with substring %q", sub)
}
return fmt.Errorf("unexpected success; want error %v", wantErr)
}
if wantErr == nil {
return fmt.Errorf("%v; want success", err)
}
if sub, ok := wantErr.(string); ok {
if strings.Contains(err.Error(), sub) {
return nil
}
return fmt.Errorf("error = %v; want an error with substring %q", err, sub)
}
if err == wantErr {
return nil
}
return fmt.Errorf("%v; want %v", err, wantErr)
}
func TestNeedsSniff(t *testing.T) {
// needsSniff returns true with an empty response.
r := &response{}
if got, want := r.needsSniff(), true; got != want {
t.Errorf("needsSniff = %t; want %t", got, want)
}
// needsSniff returns false when Content-Type = nil.
r.handlerHeader = Header{"Content-Type": nil}
if got, want := r.needsSniff(), false; got != want {
t.Errorf("needsSniff empty Content-Type = %t; want %t", got, want)
}
}
// A response should only write out single Connection: close header. Tests #19499.
func TestResponseWritesOnlySingleConnectionClose(t *testing.T) {
const connectionCloseHeader = "Connection: close"
res, err := ReadResponse(bufio.NewReader(strings.NewReader("HTTP/1.0 200 OK\r\n\r\nAAAA")), nil)
if err != nil {
t.Fatalf("ReadResponse failed %v", err)
}
var buf1 bytes.Buffer
if err = res.Write(&buf1); err != nil {
t.Fatalf("Write failed %v", err)
}
if res, err = ReadResponse(bufio.NewReader(&buf1), nil); err != nil {
t.Fatalf("ReadResponse failed %v", err)
}
var buf2 bytes.Buffer
if err = res.Write(&buf2); err != nil {
t.Fatalf("Write failed %v", err)
}
if count := strings.Count(buf2.String(), connectionCloseHeader); count != 1 {
t.Errorf("Found %d %q header", count, connectionCloseHeader)
}
}