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Add comprehensive host test #429

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merged 1 commit into from Sep 24, 2018
Merged

Add comprehensive host test #429

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273 changes: 194 additions & 79 deletions client_server_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -11,8 +11,10 @@ import (
"crypto/x509"
"encoding/base64"
"encoding/binary"
"fmt"
"io"
"io/ioutil"
"log"
"net"
"net/http"
"net/http/cookiejar"
Expand Down Expand Up @@ -42,17 +44,12 @@ var cstDialer = Dialer{
HandshakeTimeout: 30 * time.Second,
}

var cstDialerWithoutHandshakeTimeout = Dialer{
Subprotocols: []string{"p1", "p2"},
ReadBufferSize: 1024,
WriteBufferSize: 1024,
}

type cstHandler struct{ *testing.T }

type cstServer struct {
*httptest.Server
URL string
t *testing.T
}

const (
Expand Down Expand Up @@ -288,10 +285,7 @@ func TestDialCookieJar(t *testing.T) {
sendRecv(t, ws)
}

func TestDialTLS(t *testing.T) {
s := newTLSServer(t)
defer s.Close()

func rootCAs(t *testing.T, s *httptest.Server) *x509.CertPool {
certs := x509.NewCertPool()
for _, c := range s.TLS.Certificates {
roots, err := x509.ParseCertificates(c.Certificate[len(c.Certificate)-1])
Expand All @@ -302,35 +296,15 @@ func TestDialTLS(t *testing.T) {
certs.AddCert(root)
}
}

d := cstDialer
d.TLSClientConfig = &tls.Config{RootCAs: certs}
ws, _, err := d.Dial(s.URL, nil)
if err != nil {
t.Fatalf("Dial: %v", err)
}
defer ws.Close()
sendRecv(t, ws)
}

func xTestDialTLSBadCert(t *testing.T) {
// This test is deactivated because of noisy logging from the net/http package.
s := newTLSServer(t)
defer s.Close()

ws, _, err := cstDialer.Dial(s.URL, nil)
if err == nil {
ws.Close()
t.Fatalf("Dial: nil")
}
return certs
}

func TestDialTLSNoVerify(t *testing.T) {
func TestDialTLS(t *testing.T) {
s := newTLSServer(t)
defer s.Close()

d := cstDialer
d.TLSClientConfig = &tls.Config{InsecureSkipVerify: true}
d.TLSClientConfig = &tls.Config{RootCAs: rootCAs(t, s.Server)}
ws, _, err := d.Dial(s.URL, nil)
if err != nil {
t.Fatalf("Dial: %v", err)
Expand Down Expand Up @@ -415,7 +389,8 @@ func TestHandshakeTimeoutInContext(t *testing.T) {
s := newServer(t)
defer s.Close()

d := cstDialerWithoutHandshakeTimeout
d := cstDialer
d.HandshakeTimeout = 0
d.NetDialContext = func(ctx context.Context, n, a string) (net.Conn, error) {
netDialer := &net.Dialer{}
c, err := netDialer.DialContext(ctx, n, a)
Expand Down Expand Up @@ -566,33 +541,195 @@ func TestRespOnBadHandshake(t *testing.T) {
}
}

// 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()
type testLogWriter struct {
t *testing.T
}

specifiedHost := make(chan string, 1)
origHandler := s.Server.Config.Handler
func (w testLogWriter) Write(p []byte) (int, error) {
w.t.Logf("%s", p)
return len(p), nil
}

// 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)
})
// TestHost tests handling of host names and confirms that it matches net/http.
func TestHost(t *testing.T) {

ws, _, err := cstDialer.Dial(s.URL, http.Header{"Host": {"testhost"}})
if err != nil {
t.Fatalf("Dial: %v", err)
}
defer ws.Close()
upgrader := Upgrader{}
handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if IsWebSocketUpgrade(r) {
c, err := upgrader.Upgrade(w, r, http.Header{"X-Test-Host": {r.Host}})
if err != nil {
t.Fatal(err)
}
c.Close()
} else {
w.Header().Set("X-Test-Host", r.Host)
}
})

server := httptest.NewServer(handler)
defer server.Close()

tlsServer := httptest.NewTLSServer(handler)
defer tlsServer.Close()

addrs := map[*httptest.Server]string{server: server.Listener.Addr().String(), tlsServer: tlsServer.Listener.Addr().String()}
wsProtos := map[*httptest.Server]string{server: "ws://", tlsServer: "wss://"}
httpProtos := map[*httptest.Server]string{server: "http://", tlsServer: "https://"}

// Avoid log noise from net/http server by logging to testing.T
server.Config.ErrorLog = log.New(testLogWriter{t}, "", 0)
tlsServer.Config.ErrorLog = server.Config.ErrorLog

cas := rootCAs(t, tlsServer)

tests := []struct {
fail bool // true if dial / get should fail
server *httptest.Server // server to use
url string // host for request URI
header string // optional request host header
tls string // optiona host for tls ServerName
wantAddr string // expected host for dial
wantHeader string // expected request header on server
insecureSkipVerify bool
}{
{
server: server,
url: addrs[server],
wantAddr: addrs[server],
wantHeader: addrs[server],
},
{
server: tlsServer,
url: addrs[tlsServer],
wantAddr: addrs[tlsServer],
wantHeader: addrs[tlsServer],
},

{
server: server,
url: addrs[server],
header: "badhost.com",
wantAddr: addrs[server],
wantHeader: "badhost.com",
},
{
server: tlsServer,
url: addrs[tlsServer],
header: "badhost.com",
wantAddr: addrs[tlsServer],
wantHeader: "badhost.com",
},

{
server: server,
url: "example.com",
header: "badhost.com",
wantAddr: "example.com:80",
wantHeader: "badhost.com",
},
{
server: tlsServer,
url: "example.com",
header: "badhost.com",
wantAddr: "example.com:443",
wantHeader: "badhost.com",
},

if gotHost := <-specifiedHost; gotHost != "testhost" {
t.Fatalf("gotHost = %q, want \"testhost\"", gotHost)
{
server: server,
url: "badhost.com",
header: "example.com",
wantAddr: "badhost.com:80",
wantHeader: "example.com",
},
{
fail: true,
server: tlsServer,
url: "badhost.com",
header: "example.com",
wantAddr: "badhost.com:443",
},
{
server: tlsServer,
url: "badhost.com",
insecureSkipVerify: true,
wantAddr: "badhost.com:443",
wantHeader: "badhost.com",
},
{
server: tlsServer,
url: "badhost.com",
tls: "example.com",
wantAddr: "badhost.com:443",
wantHeader: "badhost.com",
},
}

sendRecv(t, ws)
for i, tt := range tests {

tls := &tls.Config{
RootCAs: cas,
ServerName: tt.tls,
InsecureSkipVerify: tt.insecureSkipVerify,
}

var gotAddr string
dialer := Dialer{
NetDial: func(network, addr string) (net.Conn, error) {
gotAddr = addr
return net.Dial(network, addrs[tt.server])
},
TLSClientConfig: tls,
}

// Test websocket dial

h := http.Header{}
if tt.header != "" {
h.Set("Host", tt.header)
}
c, resp, err := dialer.Dial(wsProtos[tt.server]+tt.url+"/", h)
if err == nil {
c.Close()
}

check := func(protos map[*httptest.Server]string) {
name := fmt.Sprintf("%d: %s%s/ header[Host]=%q, tls.ServerName=%q", i+1, protos[tt.server], tt.url, tt.header, tt.tls)
if gotAddr != tt.wantAddr {
t.Errorf("%s: got addr %s, want %s", name, gotAddr, tt.wantAddr)
}
switch {
case tt.fail && err == nil:
t.Errorf("%s: unexpected success", name)
case !tt.fail && err != nil:
t.Errorf("%s: unexpected error %v", name, err)
case !tt.fail && err == nil:
if gotHost := resp.Header.Get("X-Test-Host"); gotHost != tt.wantHeader {
t.Errorf("%s: got host %s, want %s", name, gotHost, tt.wantHeader)
}
}
}

check(wsProtos)

// Confirm that net/http has same result

transport := &http.Transport{
Dial: dialer.NetDial,
TLSClientConfig: dialer.TLSClientConfig,
}
req, _ := http.NewRequest("GET", httpProtos[tt.server]+tt.url+"/", nil)
if tt.header != "" {
req.Host = tt.header
}
client := &http.Client{Transport: transport}
resp, err = client.Do(req)
if err == nil {
resp.Body.Close()
}
transport.CloseIdleConnections()
check(httpProtos)
}
}

func TestDialCompression(t *testing.T) {
Expand Down Expand Up @@ -716,19 +853,8 @@ func TestTracingDialWithContext(t *testing.T) {
s := newTLSServer(t)
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)
}
}

d := cstDialer
d.TLSClientConfig = &tls.Config{RootCAs: certs}
d.TLSClientConfig = &tls.Config{RootCAs: rootCAs(t, s.Server)}

ws, _, err := d.DialContext(ctx, s.URL, nil)
if err != nil {
Expand Down Expand Up @@ -766,19 +892,8 @@ func TestEmptyTracingDialWithContext(t *testing.T) {
s := newTLSServer(t)
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)
}
}

d := cstDialer
d.TLSClientConfig = &tls.Config{RootCAs: certs}
d.TLSClientConfig = &tls.Config{RootCAs: rootCAs(t, s.Server)}

ws, _, err := d.DialContext(ctx, s.URL, nil)
if err != nil {
Expand Down