websocket/client_server_test.go

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// Copyright 2013 The Gorilla WebSocket Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
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package websocket
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import (
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"crypto/tls"
"crypto/x509"
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"io"
"io/ioutil"
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"net"
"net/http"
"net/http/httptest"
"net/url"
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"reflect"
"strings"
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"testing"
"time"
)
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var cstUpgrader = Upgrader{
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Subprotocols: []string{"p0", "p1"},
ReadBufferSize: 1024,
WriteBufferSize: 1024,
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Error: func(w http.ResponseWriter, r *http.Request, status int, reason error) {
http.Error(w, reason.Error(), status)
},
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}
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var cstDialer = Dialer{
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Subprotocols: []string{"p1", "p2"},
ReadBufferSize: 1024,
WriteBufferSize: 1024,
}
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type cstHandler struct{ *testing.T }
type cstServer struct {
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*httptest.Server
URL string
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}
func newServer(t *testing.T) *cstServer {
var s cstServer
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s.Server = httptest.NewServer(cstHandler{t})
s.URL = makeWsProto(s.Server.URL)
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return &s
}
func newTLSServer(t *testing.T) *cstServer {
var s cstServer
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s.Server = httptest.NewTLSServer(cstHandler{t})
s.URL = makeWsProto(s.Server.URL)
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return &s
}
func (t cstHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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if r.Method != "GET" {
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t.Logf("method %s not allowed", r.Method)
http.Error(w, "method not allowed", 405)
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return
}
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subprotos := Subprotocols(r)
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if !reflect.DeepEqual(subprotos, cstDialer.Subprotocols) {
t.Logf("subprotols=%v, want %v", subprotos, cstDialer.Subprotocols)
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http.Error(w, "bad protocol", 400)
return
}
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ws, err := cstUpgrader.Upgrade(w, r, http.Header{"Set-Cookie": {"sessionID=1234"}})
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if err != nil {
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t.Logf("Upgrade: %v", err)
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return
}
defer ws.Close()
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if ws.Subprotocol() != "p1" {
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t.Logf("Subprotocol() = %s, want p1", ws.Subprotocol())
ws.Close()
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return
}
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op, rd, err := ws.NextReader()
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if err != nil {
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t.Logf("NextReader: %v", err)
return
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}
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wr, err := ws.NextWriter(op)
if err != nil {
t.Logf("NextWriter: %v", err)
return
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}
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if _, err = io.Copy(wr, rd); err != nil {
t.Logf("NextWriter: %v", err)
return
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}
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if err := wr.Close(); err != nil {
t.Logf("Close: %v", err)
return
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}
}
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func makeWsProto(s string) string {
return "ws" + strings.TrimPrefix(s, "http")
}
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func sendRecv(t *testing.T, ws *Conn) {
const message = "Hello World!"
if err := ws.SetWriteDeadline(time.Now().Add(time.Second)); err != nil {
t.Fatalf("SetWriteDeadline: %v", err)
}
if err := ws.WriteMessage(TextMessage, []byte(message)); err != nil {
t.Fatalf("WriteMessage: %v", err)
}
if err := ws.SetReadDeadline(time.Now().Add(time.Second)); err != nil {
t.Fatalf("SetReadDeadline: %v", err)
}
_, p, err := ws.ReadMessage()
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if err != nil {
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t.Fatalf("ReadMessage: %v", err)
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}
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if string(p) != message {
t.Fatalf("message=%s, want %s", p, message)
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}
}
func TestProxyDial(t *testing.T) {
s := newServer(t)
defer s.Close()
surl, _ := url.Parse(s.URL)
cstDialer.Proxy = http.ProxyURL(surl)
connect := false
origHandler := s.Server.Config.Handler
// Capture the request Host header.
s.Server.Config.Handler = http.HandlerFunc(
func(w http.ResponseWriter, r *http.Request) {
if r.Method == "CONNECT" {
connect = true
w.WriteHeader(200)
return
}
if !connect {
t.Log("connect not recieved")
http.Error(w, "connect not recieved", 405)
return
}
origHandler.ServeHTTP(w, r)
})
ws, _, err := cstDialer.Dial(s.URL, nil)
if err != nil {
t.Fatalf("Dial: %v", err)
}
defer ws.Close()
sendRecv(t, ws)
cstDialer.Proxy = http.ProxyFromEnvironment
}
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func TestDial(t *testing.T) {
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s := newServer(t)
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defer s.Close()
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ws, _, err := cstDialer.Dial(s.URL, nil)
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if err != nil {
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t.Fatalf("Dial: %v", err)
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}
defer ws.Close()
sendRecv(t, ws)
}
func TestDialTLS(t *testing.T) {
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s := newTLSServer(t)
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defer s.Close()
certs := x509.NewCertPool()
for _, c := range s.TLS.Certificates {
roots, err := x509.ParseCertificates(c.Certificate[len(c.Certificate)-1])
if err != nil {
t.Fatalf("error parsing server's root cert: %v", err)
}
for _, root := range roots {
certs.AddCert(root)
}
}
u, _ := url.Parse(s.URL)
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d := cstDialer
d.NetDial = func(network, addr string) (net.Conn, error) { return net.Dial(network, u.Host) }
d.TLSClientConfig = &tls.Config{RootCAs: certs}
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ws, _, err := d.Dial("wss://example.com/", nil)
if err != nil {
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t.Fatalf("Dial: %v", err)
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}
defer ws.Close()
sendRecv(t, ws)
}
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func xTestDialTLSBadCert(t *testing.T) {
// This test is deactivated because of noisy logging from the net/http package.
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s := newTLSServer(t)
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defer s.Close()
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ws, _, err := cstDialer.Dial(s.URL, nil)
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if err == nil {
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ws.Close()
t.Fatalf("Dial: nil")
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}
}
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func xTestDialTLSNoVerify(t *testing.T) {
s := newTLSServer(t)
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defer s.Close()
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d := cstDialer
d.TLSClientConfig = &tls.Config{InsecureSkipVerify: true}
ws, _, err := d.Dial(s.URL, nil)
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if err != nil {
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t.Fatalf("Dial: %v", err)
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}
defer ws.Close()
sendRecv(t, ws)
}
func TestDialTimeout(t *testing.T) {
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s := newServer(t)
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defer s.Close()
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d := cstDialer
d.HandshakeTimeout = -1
ws, _, err := d.Dial(s.URL, nil)
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if err == nil {
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ws.Close()
t.Fatalf("Dial: nil")
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}
}
func TestDialBadScheme(t *testing.T) {
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s := newServer(t)
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defer s.Close()
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ws, _, err := cstDialer.Dial(s.Server.URL, nil)
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if err == nil {
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ws.Close()
t.Fatalf("Dial: nil")
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}
}
func TestDialBadOrigin(t *testing.T) {
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s := newServer(t)
defer s.Close()
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ws, resp, err := cstDialer.Dial(s.URL, http.Header{"Origin": {"bad"}})
if err == nil {
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ws.Close()
t.Fatalf("Dial: nil")
}
if resp == nil {
t.Fatalf("resp=nil, err=%v", err)
}
if resp.StatusCode != http.StatusForbidden {
t.Fatalf("status=%d, want %d", resp.StatusCode, http.StatusForbidden)
}
}
func TestDialBadHeader(t *testing.T) {
s := newServer(t)
defer s.Close()
for _, k := range []string{"Upgrade",
"Connection",
"Sec-Websocket-Key",
"Sec-Websocket-Version",
"Sec-Websocket-Protocol"} {
h := http.Header{}
h.Set(k, "bad")
ws, _, err := cstDialer.Dial(s.URL, http.Header{"Origin": {"bad"}})
if err == nil {
ws.Close()
t.Errorf("Dial with header %s returned nil", k)
}
}
}
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func TestHandshake(t *testing.T) {
s := newServer(t)
defer s.Close()
ws, resp, err := cstDialer.Dial(s.URL, http.Header{"Origin": {s.URL}})
if err != nil {
t.Fatalf("Dial: %v", err)
}
defer ws.Close()
var sessionID string
for _, c := range resp.Cookies() {
if c.Name == "sessionID" {
sessionID = c.Value
}
}
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if sessionID != "1234" {
t.Error("Set-Cookie not received from the server.")
}
if ws.Subprotocol() != "p1" {
t.Errorf("ws.Subprotocol() = %s, want p1", ws.Subprotocol())
}
sendRecv(t, ws)
}
func TestRespOnBadHandshake(t *testing.T) {
const expectedStatus = http.StatusGone
const expectedBody = "This is the response body."
s := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(expectedStatus)
io.WriteString(w, expectedBody)
}))
defer s.Close()
ws, resp, err := cstDialer.Dial(makeWsProto(s.URL), nil)
if err == nil {
ws.Close()
t.Fatalf("Dial: nil")
}
if resp == nil {
t.Fatalf("resp=nil, err=%v", err)
}
if resp.StatusCode != expectedStatus {
t.Errorf("resp.StatusCode=%d, want %d", resp.StatusCode, expectedStatus)
}
p, err := ioutil.ReadAll(resp.Body)
if err != nil {
t.Fatalf("ReadFull(resp.Body) returned error %v", err)
}
if string(p) != expectedBody {
t.Errorf("resp.Body=%s, want %s", p, expectedBody)
}
}
// TestHostHeader confirms that the host header provided in the call to Dial is
// sent to the server.
func TestHostHeader(t *testing.T) {
s := newServer(t)
defer s.Close()
specifiedHost := make(chan string, 1)
origHandler := s.Server.Config.Handler
// Capture the request Host header.
s.Server.Config.Handler = http.HandlerFunc(
func(w http.ResponseWriter, r *http.Request) {
specifiedHost <- r.Host
origHandler.ServeHTTP(w, r)
})
ws, _, err := cstDialer.Dial(s.URL, http.Header{"Host": {"testhost"}})
if err != nil {
t.Fatalf("Dial: %v", err)
}
defer ws.Close()
if gotHost := <-specifiedHost; gotHost != "testhost" {
t.Fatalf("gotHost = %q, want \"testhost\"", gotHost)
}
sendRecv(t, ws)
}