update packages

vendor/github.com/gorilla/websocket/.travis.yml

@@ -8,7 +8,6 @@ matrix:
     - go: 1.6
     - go: 1.7
     - go: 1.8
-    - go: 1.9
     - go: tip
   allow_failures:
     - go: tip

vendor/github.com/gorilla/websocket/client.go

@@ -5,8 +5,10 @@
 package websocket
 
 import (
+	"bufio"
 	"bytes"
 	"crypto/tls"
+	"encoding/base64"
 	"errors"
 	"io"
 	"io/ioutil"
@@ -86,6 +88,50 @@ type Dialer struct {
 
 var errMalformedURL = errors.New("malformed ws or wss URL")
 
+// parseURL parses the URL.
+//
+// This function is a replacement for the standard library url.Parse function.
+// In Go 1.4 and earlier, url.Parse loses information from the path.
+func parseURL(s string) (*url.URL, error) {
+	// From the RFC:
+	//
+	// ws-URI = "ws:" "//" host [ ":" port ] path [ "?" query ]
+	// wss-URI = "wss:" "//" host [ ":" port ] path [ "?" query ]
+	var u url.URL
+	switch {
+	case strings.HasPrefix(s, "ws://"):
+		u.Scheme = "ws"
+		s = s[len("ws://"):]
+	case strings.HasPrefix(s, "wss://"):
+		u.Scheme = "wss"
+		s = s[len("wss://"):]
+	default:
+		return nil, errMalformedURL
+	}
+
+	if i := strings.Index(s, "?"); i >= 0 {
+		u.RawQuery = s[i+1:]
+		s = s[:i]
+	}
+
+	if i := strings.Index(s, "/"); i >= 0 {
+		u.Opaque = s[i:]
+		s = s[:i]
+	} else {
+		u.Opaque = "/"
+	}
+
+	u.Host = s
+
+	if strings.Contains(u.Host, "@") {
+		// Don't bother parsing user information because user information is
+		// not allowed in websocket URIs.
+		return nil, errMalformedURL
+	}
+
+	return &u, nil
+}
+
 func hostPortNoPort(u *url.URL) (hostPort, hostNoPort string) {
 	hostPort = u.Host
 	hostNoPort = u.Host
@@ -104,7 +150,7 @@ func hostPortNoPort(u *url.URL) (hostPort, hostNoPort string) {
 	return hostPort, hostNoPort
 }
 
-// DefaultDialer is a dialer with all fields set to the default values.
+// DefaultDialer is a dialer with all fields set to the default zero values.
 var DefaultDialer = &Dialer{
 	Proxy: http.ProxyFromEnvironment,
 }
@@ -131,7 +177,7 @@ func (d *Dialer) Dial(urlStr string, requestHeader http.Header) (*Conn, *http.Re
 		return nil, nil, err
 	}
 
-	u, err := url.Parse(urlStr)
+	u, err := parseURL(urlStr)
 	if err != nil {
 		return nil, nil, err
 	}
@@ -200,52 +246,36 @@ func (d *Dialer) Dial(urlStr string, requestHeader http.Header) (*Conn, *http.Re
 		req.Header.Set("Sec-Websocket-Extensions", "permessage-deflate; server_no_context_takeover; client_no_context_takeover")
 	}
 
+	hostPort, hostNoPort := hostPortNoPort(u)
+
+	var proxyURL *url.URL
+	// Check wether the proxy method has been configured
+	if d.Proxy != nil {
+		proxyURL, err = d.Proxy(req)
+	}
+	if err != nil {
+		return nil, nil, err
+	}
+
+	var targetHostPort string
+	if proxyURL != nil {
+		targetHostPort, _ = hostPortNoPort(proxyURL)
+	} else {
+		targetHostPort = hostPort
+	}
+
 	var deadline time.Time
 	if d.HandshakeTimeout != 0 {
 		deadline = time.Now().Add(d.HandshakeTimeout)
 	}
 
-	// Get network dial function.
 	netDial := d.NetDial
 	if netDial == nil {
 		netDialer := &net.Dialer{Deadline: deadline}
 		netDial = netDialer.Dial
 	}
 
-	// If needed, wrap the dial function to set the connection deadline.
-	if !deadline.Equal(time.Time{}) {
-		forwardDial := netDial
-		netDial = func(network, addr string) (net.Conn, error) {
-			c, err := forwardDial(network, addr)
-			if err != nil {
-				return nil, err
-			}
-			err = c.SetDeadline(deadline)
-			if err != nil {
-				c.Close()
-				return nil, err
-			}
-			return c, nil
-		}
-	}
-
-	// If needed, wrap the dial function to connect through a proxy.
-	if d.Proxy != nil {
-		proxyURL, err := d.Proxy(req)
-		if err != nil {
-			return nil, nil, err
-		}
-		if proxyURL != nil {
-			dialer, err := proxy_FromURL(proxyURL, netDialerFunc(netDial))
-			if err != nil {
-				return nil, nil, err
-			}
-			netDial = dialer.Dial
-		}
-	}
-
-	hostPort, hostNoPort := hostPortNoPort(u)
-	netConn, err := netDial("tcp", hostPort)
+	netConn, err := netDial("tcp", targetHostPort)
 	if err != nil {
 		return nil, nil, err
 	}
@@ -256,6 +286,42 @@ func (d *Dialer) Dial(urlStr string, requestHeader http.Header) (*Conn, *http.Re
 		}
 	}()
 
+	if err := netConn.SetDeadline(deadline); err != nil {
+		return nil, nil, err
+	}
+
+	if proxyURL != nil {
+		connectHeader := make(http.Header)
+		if user := proxyURL.User; user != nil {
+			proxyUser := user.Username()
+			if proxyPassword, passwordSet := user.Password(); passwordSet {
+				credential := base64.StdEncoding.EncodeToString([]byte(proxyUser + ":" + proxyPassword))
+				connectHeader.Set("Proxy-Authorization", "Basic "+credential)
+			}
+		}
+		connectReq := &http.Request{
+			Method: "CONNECT",
+			URL:    &url.URL{Opaque: hostPort},
+			Host:   hostPort,
+			Header: connectHeader,
+		}
+
+		connectReq.Write(netConn)
+
+		// Read response.
+		// Okay to use and discard buffered reader here, because
+		// TLS server will not speak until spoken to.
+		br := bufio.NewReader(netConn)
+		resp, err := http.ReadResponse(br, connectReq)
+		if err != nil {
+			return nil, nil, err
+		}
+		if resp.StatusCode != 200 {
+			f := strings.SplitN(resp.Status, " ", 2)
+			return nil, nil, errors.New(f[1])
+		}
+	}
+
 	if u.Scheme == "https" {
 		cfg := cloneTLSConfig(d.TLSClientConfig)
 		if cfg.ServerName == "" {

vendor/github.com/gorilla/websocket/client_server_test.go

@@ -5,14 +5,11 @@
 package websocket
 
 import (
-	"bytes"
 	"crypto/tls"
 	"crypto/x509"
 	"encoding/base64"
-	"encoding/binary"
 	"io"
 	"io/ioutil"
-	"net"
 	"net/http"
 	"net/http/cookiejar"
 	"net/http/httptest"
@@ -34,10 +31,9 @@ var cstUpgrader = Upgrader{
 }
 
 var cstDialer = Dialer{
-	Subprotocols:     []string{"p1", "p2"},
-	ReadBufferSize:   1024,
-	WriteBufferSize:  1024,
-	HandshakeTimeout: 30 * time.Second,
+	Subprotocols:    []string{"p1", "p2"},
+	ReadBufferSize:  1024,
+	WriteBufferSize: 1024,
 }
 
 type cstHandler struct{ *testing.T }
@@ -147,9 +143,8 @@ func TestProxyDial(t *testing.T) {
 	s := newServer(t)
 	defer s.Close()
 
-	surl, _ := url.Parse(s.Server.URL)
+	surl, _ := url.Parse(s.URL)
 
-	cstDialer := cstDialer // make local copy for modification on next line.
 	cstDialer.Proxy = http.ProxyURL(surl)
 
 	connect := false
@@ -165,8 +160,8 @@ func TestProxyDial(t *testing.T) {
 			}
 
 			if !connect {
-				t.Log("connect not received")
-				http.Error(w, "connect not received", 405)
+				t.Log("connect not recieved")
+				http.Error(w, "connect not recieved", 405)
 				return
 			}
 			origHandler.ServeHTTP(w, r)
@@ -178,16 +173,16 @@ func TestProxyDial(t *testing.T) {
 	}
 	defer ws.Close()
 	sendRecv(t, ws)
+
+	cstDialer.Proxy = http.ProxyFromEnvironment
 }
 
 func TestProxyAuthorizationDial(t *testing.T) {
 	s := newServer(t)
 	defer s.Close()
 
-	surl, _ := url.Parse(s.Server.URL)
+	surl, _ := url.Parse(s.URL)
 	surl.User = url.UserPassword("username", "password")
-
-	cstDialer := cstDialer // make local copy for modification on next line.
 	cstDialer.Proxy = http.ProxyURL(surl)
 
 	connect := false
@@ -205,8 +200,8 @@ func TestProxyAuthorizationDial(t *testing.T) {
 			}
 
 			if !connect {
-				t.Log("connect with proxy authorization not received")
-				http.Error(w, "connect with proxy authorization not received", 405)
+				t.Log("connect with proxy authorization not recieved")
+				http.Error(w, "connect with proxy authorization not recieved", 405)
 				return
 			}
 			origHandler.ServeHTTP(w, r)
@@ -218,6 +213,8 @@ func TestProxyAuthorizationDial(t *testing.T) {
 	}
 	defer ws.Close()
 	sendRecv(t, ws)
+
+	cstDialer.Proxy = http.ProxyFromEnvironment
 }
 
 func TestDial(t *testing.T) {
@@ -240,7 +237,7 @@ func TestDialCookieJar(t *testing.T) {
 	d := cstDialer
 	d.Jar = jar
 
-	u, _ := url.Parse(s.URL)
+	u, _ := parseURL(s.URL)
 
 	switch u.Scheme {
 	case "ws":
@@ -249,7 +246,7 @@ func TestDialCookieJar(t *testing.T) {
 		u.Scheme = "https"
 	}
 
-	cookies := []*http.Cookie{{Name: "gorilla", Value: "ws", Path: "/"}}
+	cookies := []*http.Cookie{&http.Cookie{Name: "gorilla", Value: "ws", Path: "/"}}
 	d.Jar.SetCookies(u, cookies)
 
 	ws, _, err := d.Dial(s.URL, nil)
@@ -401,17 +398,9 @@ func TestBadMethod(t *testing.T) {
 	}))
 	defer s.Close()
 
-	req, err := http.NewRequest("POST", s.URL, strings.NewReader(""))
+	resp, err := http.PostForm(s.URL, url.Values{})
 	if err != nil {
-		t.Fatalf("NewRequest returned error %v", err)
-	}
-	req.Header.Set("Connection", "upgrade")
-	req.Header.Set("Upgrade", "websocket")
-	req.Header.Set("Sec-Websocket-Version", "13")
-
-	resp, err := http.DefaultClient.Do(req)
-	if err != nil {
-		t.Fatalf("Do returned error %v", err)
+		t.Fatalf("PostForm returned error %v", err)
 	}
 	resp.Body.Close()
 	if resp.StatusCode != http.StatusMethodNotAllowed {
@@ -521,82 +510,3 @@ func TestDialCompression(t *testing.T) {
 	defer ws.Close()
 	sendRecv(t, ws)
 }
-
-func TestSocksProxyDial(t *testing.T) {
-	s := newServer(t)
-	defer s.Close()
-
-	proxyListener, err := net.Listen("tcp", "127.0.0.1:0")
-	if err != nil {
-		t.Fatalf("listen failed: %v", err)
-	}
-	defer proxyListener.Close()
-	go func() {
-		c1, err := proxyListener.Accept()
-		if err != nil {
-			t.Errorf("proxy accept failed: %v", err)
-			return
-		}
-		defer c1.Close()
-
-		c1.SetDeadline(time.Now().Add(30 * time.Second))
-
-		buf := make([]byte, 32)
-		if _, err := io.ReadFull(c1, buf[:3]); err != nil {
-			t.Errorf("read failed: %v", err)
-			return
-		}
-		if want := []byte{5, 1, 0}; !bytes.Equal(want, buf[:len(want)]) {
-			t.Errorf("read %x, want %x", buf[:len(want)], want)
-		}
-		if _, err := c1.Write([]byte{5, 0}); err != nil {
-			t.Errorf("write failed: %v", err)
-			return
-		}
-		if _, err := io.ReadFull(c1, buf[:10]); err != nil {
-			t.Errorf("read failed: %v", err)
-			return
-		}
-		if want := []byte{5, 1, 0, 1}; !bytes.Equal(want, buf[:len(want)]) {
-			t.Errorf("read %x, want %x", buf[:len(want)], want)
-			return
-		}
-		buf[1] = 0
-		if _, err := c1.Write(buf[:10]); err != nil {
-			t.Errorf("write failed: %v", err)
-			return
-		}
-
-		ip := net.IP(buf[4:8])
-		port := binary.BigEndian.Uint16(buf[8:10])
-
-		c2, err := net.DialTCP("tcp", nil, &net.TCPAddr{IP: ip, Port: int(port)})
-		if err != nil {
-			t.Errorf("dial failed; %v", err)
-			return
-		}
-		defer c2.Close()
-		done := make(chan struct{})
-		go func() {
-			io.Copy(c1, c2)
-			close(done)
-		}()
-		io.Copy(c2, c1)
-		<-done
-	}()
-
-	purl, err := url.Parse("socks5://" + proxyListener.Addr().String())
-	if err != nil {
-		t.Fatalf("parse failed: %v", err)
-	}
-
-	cstDialer := cstDialer // make local copy for modification on next line.
-	cstDialer.Proxy = http.ProxyURL(purl)
-
-	ws, _, err := cstDialer.Dial(s.URL, nil)
-	if err != nil {
-		t.Fatalf("Dial: %v", err)
-	}
-	defer ws.Close()
-	sendRecv(t, ws)
-}

vendor/github.com/gorilla/websocket/client_test.go

@@ -6,9 +6,49 @@ package websocket
 
 import (
 	"net/url"
+	"reflect"
 	"testing"
 )
 
+var parseURLTests = []struct {
+	s   string
+	u   *url.URL
+	rui string
+}{
+	{"ws://example.com/", &url.URL{Scheme: "ws", Host: "example.com", Opaque: "/"}, "/"},
+	{"ws://example.com", &url.URL{Scheme: "ws", Host: "example.com", Opaque: "/"}, "/"},
+	{"ws://example.com:7777/", &url.URL{Scheme: "ws", Host: "example.com:7777", Opaque: "/"}, "/"},
+	{"wss://example.com/", &url.URL{Scheme: "wss", Host: "example.com", Opaque: "/"}, "/"},
+	{"wss://example.com/a/b", &url.URL{Scheme: "wss", Host: "example.com", Opaque: "/a/b"}, "/a/b"},
+	{"ss://example.com/a/b", nil, ""},
+	{"ws://webmaster@example.com/", nil, ""},
+	{"wss://example.com/a/b?x=y", &url.URL{Scheme: "wss", Host: "example.com", Opaque: "/a/b", RawQuery: "x=y"}, "/a/b?x=y"},
+	{"wss://example.com?x=y", &url.URL{Scheme: "wss", Host: "example.com", Opaque: "/", RawQuery: "x=y"}, "/?x=y"},
+}
+
+func TestParseURL(t *testing.T) {
+	for _, tt := range parseURLTests {
+		u, err := parseURL(tt.s)
+		if tt.u != nil && err != nil {
+			t.Errorf("parseURL(%q) returned error %v", tt.s, err)
+			continue
+		}
+		if tt.u == nil {
+			if err == nil {
+				t.Errorf("parseURL(%q) did not return error", tt.s)
+			}
+			continue
+		}
+		if !reflect.DeepEqual(u, tt.u) {
+			t.Errorf("parseURL(%q) = %v, want %v", tt.s, u, tt.u)
+			continue
+		}
+		if u.RequestURI() != tt.rui {
+			t.Errorf("parseURL(%q).RequestURI() = %v, want %v", tt.s, u.RequestURI(), tt.rui)
+		}
+	}
+}
+
 var hostPortNoPortTests = []struct {
 	u                    *url.URL
 	hostPort, hostNoPort string

vendor/github.com/gorilla/websocket/conn.go

@@ -76,7 +76,7 @@ const (
 	// is UTF-8 encoded text.
 	PingMessage = 9
 
-	// PongMessage denotes a pong control message. The optional message payload
+	// PongMessage denotes a ping control message. The optional message payload
 	// is UTF-8 encoded text.
 	PongMessage = 10
 )
@@ -100,8 +100,9 @@ func (e *netError) Error() string   { return e.msg }
 func (e *netError) Temporary() bool { return e.temporary }
 func (e *netError) Timeout() bool   { return e.timeout }
 
-// CloseError represents a close message.
+// CloseError represents close frame.
 type CloseError struct {
+
 	// Code is defined in RFC 6455, section 11.7.
 	Code int
 
@@ -342,8 +343,7 @@ func (c *Conn) Subprotocol() string {
 	return c.subprotocol
 }
 
-// Close closes the underlying network connection without sending or waiting
-// for a close message.
+// Close closes the underlying network connection without sending or waiting for a close frame.
 func (c *Conn) Close() error {
 	return c.conn.Close()
 }
@@ -484,9 +484,6 @@ func (c *Conn) prepWrite(messageType int) error {
 //
 // There can be at most one open writer on a connection. NextWriter closes the
 // previous writer if the application has not already done so.
-//
-// All message types (TextMessage, BinaryMessage, CloseMessage, PingMessage and
-// PongMessage) are supported.
 func (c *Conn) NextWriter(messageType int) (io.WriteCloser, error) {
 	if err := c.prepWrite(messageType); err != nil {
 		return nil, err
@@ -767,6 +764,7 @@ func (c *Conn) SetWriteDeadline(t time.Time) error {
 // Read methods
 
 func (c *Conn) advanceFrame() (int, error) {
+
 	// 1. Skip remainder of previous frame.
 
 	if c.readRemaining > 0 {
@@ -1035,7 +1033,7 @@ func (c *Conn) SetReadDeadline(t time.Time) error {
 }
 
 // SetReadLimit sets the maximum size for a message read from the peer. If a
-// message exceeds the limit, the connection sends a close message to the peer
+// message exceeds the limit, the connection sends a close frame to the peer
 // and returns ErrReadLimit to the application.
 func (c *Conn) SetReadLimit(limit int64) {
 	c.readLimit = limit
@@ -1048,21 +1046,24 @@ func (c *Conn) CloseHandler() func(code int, text string) error {
 
 // SetCloseHandler sets the handler for close messages received from the peer.
 // The code argument to h is the received close code or CloseNoStatusReceived
-// if the close message is empty. The default close handler sends a close
-// message back to the peer.
+// if the close message is empty. The default close handler sends a close frame
+// back to the peer.
 //
 // The application must read the connection to process close messages as
-// described in the section on Control Messages above.
+// described in the section on Control Frames above.
 //
-// The connection read methods return a CloseError when a close message is
+// The connection read methods return a CloseError when a close frame is
 // received. Most applications should handle close messages as part of their
 // normal error handling. Applications should only set a close handler when the
-// application must perform some action before sending a close message back to
+// application must perform some action before sending a close frame back to
 // the peer.
 func (c *Conn) SetCloseHandler(h func(code int, text string) error) {
 	if h == nil {
 		h = func(code int, text string) error {
-			message := FormatCloseMessage(code, "")
+			message := []byte{}
+			if code != CloseNoStatusReceived {
+				message = FormatCloseMessage(code, "")
+			}
 			c.WriteControl(CloseMessage, message, time.Now().Add(writeWait))
 			return nil
 		}
@@ -1076,11 +1077,11 @@ func (c *Conn) PingHandler() func(appData string) error {
 }
 
 // SetPingHandler sets the handler for ping messages received from the peer.
-// The appData argument to h is the PING message application data. The default
+// The appData argument to h is the PING frame application data. The default
 // ping handler sends a pong to the peer.
 //
 // The application must read the connection to process ping messages as
-// described in the section on Control Messages above.
+// described in the section on Control Frames above.
 func (c *Conn) SetPingHandler(h func(appData string) error) {
 	if h == nil {
 		h = func(message string) error {
@@ -1102,11 +1103,11 @@ func (c *Conn) PongHandler() func(appData string) error {
 }
 
 // SetPongHandler sets the handler for pong messages received from the peer.
-// The appData argument to h is the PONG message application data. The default
+// The appData argument to h is the PONG frame application data. The default
 // pong handler does nothing.
 //
 // The application must read the connection to process ping messages as
-// described in the section on Control Messages above.
+// described in the section on Control Frames above.
 func (c *Conn) SetPongHandler(h func(appData string) error) {
 	if h == nil {
 		h = func(string) error { return nil }
@@ -1140,14 +1141,7 @@ func (c *Conn) SetCompressionLevel(level int) error {
 }
 
 // FormatCloseMessage formats closeCode and text as a WebSocket close message.
-// An empty message is returned for code CloseNoStatusReceived.
 func FormatCloseMessage(closeCode int, text string) []byte {
-	if closeCode == CloseNoStatusReceived {
-		// Return empty message because it's illegal to send
-		// CloseNoStatusReceived. Return non-nil value in case application
-		// checks for nil.
-		return []byte{}
-	}
 	buf := make([]byte, 2+len(text))
 	binary.BigEndian.PutUint16(buf, uint16(closeCode))
 	copy(buf[2:], text)

vendor/github.com/gorilla/websocket/conn_test.go

@@ -341,6 +341,7 @@ func TestUnderlyingConn(t *testing.T) {
 }
 
 func TestBufioReadBytes(t *testing.T) {
+
 	// Test calling bufio.ReadBytes for value longer than read buffer size.
 
 	m := make([]byte, 512)
@@ -365,7 +366,7 @@ func TestBufioReadBytes(t *testing.T) {
 		t.Fatalf("ReadBytes() returned %v", err)
 	}
 	if len(p) != len(m) {
-		t.Fatalf("read returned %d bytes, want %d bytes", len(p), len(m))
+		t.Fatalf("read returnd %d bytes, want %d bytes", len(p), len(m))
 	}
 }
 

vendor/github.com/gorilla/websocket/doc.go

@@ -6,8 +6,9 @@
 //
 // Overview
 //
-// The Conn type represents a WebSocket connection. A server application calls
-// the Upgrader.Upgrade method from an HTTP request handler to get a *Conn:
+// The Conn type represents a WebSocket connection. A server application uses
+// the Upgrade function from an Upgrader object with a HTTP request handler
+// to get a pointer to a Conn:
 //
 //  var upgrader = websocket.Upgrader{
 //      ReadBufferSize:  1024,
@@ -30,12 +31,10 @@
 //  for {
 //      messageType, p, err := conn.ReadMessage()
 //      if err != nil {
-//          log.Println(err)
 //          return
 //      }
-//      if err := conn.WriteMessage(messageType, p); err != nil {
-//          log.Println(err)
-//          return
+//      if err = conn.WriteMessage(messageType, p); err != nil {
+//          return err
 //      }
 //  }
 //
@@ -86,26 +85,20 @@
 // and pong. Call the connection WriteControl, WriteMessage or NextWriter
 // methods to send a control message to the peer.
 //
-// Connections handle received close messages by calling the handler function
-// set with the SetCloseHandler method and by returning a *CloseError from the
-// NextReader, ReadMessage or the message Read method. The default close
-// handler sends a close message to the peer.
+// Connections handle received close messages by sending a close message to the
+// peer and returning a *CloseError from the the NextReader, ReadMessage or the
+// message Read method.
 //
-// Connections handle received ping messages by calling the handler function
-// set with the SetPingHandler method. The default ping handler sends a pong
-// message to the peer.
+// Connections handle received ping and pong messages by invoking callback
+// functions set with SetPingHandler and SetPongHandler methods. The callback
+// functions are called from the NextReader, ReadMessage and the message Read
+// methods.
 //
-// Connections handle received pong messages by calling the handler function
-// set with the SetPongHandler method. The default pong handler does nothing.
-// If an application sends ping messages, then the application should set a
-// pong handler to receive the corresponding pong.
+// The default ping handler sends a pong to the peer. The application's reading
+// goroutine can block for a short time while the handler writes the pong data
+// to the connection.
 //
-// The control message handler functions are called from the NextReader,
-// ReadMessage and message reader Read methods. The default close and ping
-// handlers can block these methods for a short time when the handler writes to
-// the connection.
-//
-// The application must read the connection to process close, ping and pong
+// The application must read the connection to process ping, pong and close
 // messages sent from the peer. If the application is not otherwise interested
 // in messages from the peer, then the application should start a goroutine to
 // read and discard messages from the peer. A simple example is:
@@ -154,9 +147,9 @@
 //      CheckOrigin: func(r *http.Request) bool { return true },
 //  }
 //
-// The deprecated package-level Upgrade function does not perform origin
-// checking. The application is responsible for checking the Origin header
-// before calling the Upgrade function.
+// The deprecated Upgrade function does not enforce an origin policy. It's the
+// application's responsibility to check the Origin header before calling
+// Upgrade.
 //
 // Compression EXPERIMENTAL
 //

vendor/github.com/gorilla/websocket/examples/chat/README.md

@@ -1,6 +1,6 @@
 # Chat Example
 
-This application shows how to use the
+This application shows how to use use the
 [websocket](https://github.com/gorilla/websocket) package to implement a simple
 web chat application.
 

vendor/github.com/gorilla/websocket/examples/chat/client.go

@@ -64,7 +64,7 @@ func (c *Client) readPump() {
 	for {
 		_, message, err := c.conn.ReadMessage()
 		if err != nil {
-			if websocket.IsUnexpectedCloseError(err, websocket.CloseGoingAway, websocket.CloseAbnormalClosure) {
+			if websocket.IsUnexpectedCloseError(err, websocket.CloseGoingAway) {
 				log.Printf("error: %v", err)
 			}
 			break
@@ -113,7 +113,7 @@ func (c *Client) writePump() {
 			}
 		case <-ticker.C:
 			c.conn.SetWriteDeadline(time.Now().Add(writeWait))
-			if err := c.conn.WriteMessage(websocket.PingMessage, nil); err != nil {
+			if err := c.conn.WriteMessage(websocket.PingMessage, []byte{}); err != nil {
 				return
 			}
 		}

vendor/github.com/gorilla/websocket/examples/echo/server.go

@@ -55,7 +55,6 @@ func main() {
 
 var homeTemplate = template.Must(template.New("").Parse(`
 <!DOCTYPE html>
-<html>
 <head>
 <meta charset="utf-8">
 <script>  

vendor/github.com/gorilla/websocket/json.go

@@ -9,14 +9,12 @@ import (
 	"io"
 )
 
-// WriteJSON writes the JSON encoding of v as a message.
-//
-// Deprecated: Use c.WriteJSON instead.
+// WriteJSON is deprecated, use c.WriteJSON instead.
 func WriteJSON(c *Conn, v interface{}) error {
 	return c.WriteJSON(v)
 }
 
-// WriteJSON writes the JSON encoding of v as a message.
+// WriteJSON writes the JSON encoding of v to the connection.
 //
 // See the documentation for encoding/json Marshal for details about the
 // conversion of Go values to JSON.
@@ -33,10 +31,7 @@ func (c *Conn) WriteJSON(v interface{}) error {
 	return err2
 }
 
-// ReadJSON reads the next JSON-encoded message from the connection and stores
-// it in the value pointed to by v.
-//
-// Deprecated: Use c.ReadJSON instead.
+// ReadJSON is deprecated, use c.ReadJSON instead.
 func ReadJSON(c *Conn, v interface{}) error {
 	return c.ReadJSON(v)
 }

vendor/github.com/gorilla/websocket/mask.go

@@ -11,6 +11,7 @@ import "unsafe"
 const wordSize = int(unsafe.Sizeof(uintptr(0)))
 
 func maskBytes(key [4]byte, pos int, b []byte) int {
+
 	// Mask one byte at a time for small buffers.
 	if len(b) < 2*wordSize {
 		for i := range b {

vendor/github.com/gorilla/websocket/proxy.go

@@ -1,77 +0,0 @@
-// Copyright 2017 The Gorilla WebSocket 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 websocket
-
-import (
-	"bufio"
-	"encoding/base64"
-	"errors"
-	"net"
-	"net/http"
-	"net/url"
-	"strings"
-)
-
-type netDialerFunc func(netowrk, addr string) (net.Conn, error)
-
-func (fn netDialerFunc) Dial(network, addr string) (net.Conn, error) {
-	return fn(network, addr)
-}
-
-func init() {
-	proxy_RegisterDialerType("http", func(proxyURL *url.URL, forwardDialer proxy_Dialer) (proxy_Dialer, error) {
-		return &httpProxyDialer{proxyURL: proxyURL, fowardDial: forwardDialer.Dial}, nil
-	})
-}
-
-type httpProxyDialer struct {
-	proxyURL   *url.URL
-	fowardDial func(network, addr string) (net.Conn, error)
-}
-
-func (hpd *httpProxyDialer) Dial(network string, addr string) (net.Conn, error) {
-	hostPort, _ := hostPortNoPort(hpd.proxyURL)
-	conn, err := hpd.fowardDial(network, hostPort)
-	if err != nil {
-		return nil, err
-	}
-
-	connectHeader := make(http.Header)
-	if user := hpd.proxyURL.User; user != nil {
-		proxyUser := user.Username()
-		if proxyPassword, passwordSet := user.Password(); passwordSet {
-			credential := base64.StdEncoding.EncodeToString([]byte(proxyUser + ":" + proxyPassword))
-			connectHeader.Set("Proxy-Authorization", "Basic "+credential)
-		}
-	}
-
-	connectReq := &http.Request{
-		Method: "CONNECT",
-		URL:    &url.URL{Opaque: addr},
-		Host:   addr,
-		Header: connectHeader,
-	}
-
-	if err := connectReq.Write(conn); err != nil {
-		conn.Close()
-		return nil, err
-	}
-
-	// Read response. It's OK to use and discard buffered reader here becaue
-	// the remote server does not speak until spoken to.
-	br := bufio.NewReader(conn)
-	resp, err := http.ReadResponse(br, connectReq)
-	if err != nil {
-		conn.Close()
-		return nil, err
-	}
-
-	if resp.StatusCode != 200 {
-		conn.Close()
-		f := strings.SplitN(resp.Status, " ", 2)
-		return nil, errors.New(f[1])
-	}
-	return conn, nil
-}

vendor/github.com/gorilla/websocket/server.go

@@ -76,7 +76,7 @@ func checkSameOrigin(r *http.Request) bool {
 	if err != nil {
 		return false
 	}
-	return equalASCIIFold(u.Host, r.Host)
+	return u.Host == r.Host
 }
 
 func (u *Upgrader) selectSubprotocol(r *http.Request, responseHeader http.Header) string {
@@ -104,28 +104,26 @@ func (u *Upgrader) selectSubprotocol(r *http.Request, responseHeader http.Header
 // If the upgrade fails, then Upgrade replies to the client with an HTTP error
 // response.
 func (u *Upgrader) Upgrade(w http.ResponseWriter, r *http.Request, responseHeader http.Header) (*Conn, error) {
-	const badHandshake = "websocket: the client is not using the websocket protocol: "
-
-	if !tokenListContainsValue(r.Header, "Connection", "upgrade") {
-		return u.returnError(w, r, http.StatusBadRequest, badHandshake+"'upgrade' token not found in 'Connection' header")
-	}
-
-	if !tokenListContainsValue(r.Header, "Upgrade", "websocket") {
-		return u.returnError(w, r, http.StatusBadRequest, badHandshake+"'websocket' token not found in 'Upgrade' header")
-	}
-
 	if r.Method != "GET" {
-		return u.returnError(w, r, http.StatusMethodNotAllowed, badHandshake+"request method is not GET")
-	}
-
-	if !tokenListContainsValue(r.Header, "Sec-Websocket-Version", "13") {
-		return u.returnError(w, r, http.StatusBadRequest, "websocket: unsupported version: 13 not found in 'Sec-Websocket-Version' header")
+		return u.returnError(w, r, http.StatusMethodNotAllowed, "websocket: not a websocket handshake: request method is not GET")
 	}
 
 	if _, ok := responseHeader["Sec-Websocket-Extensions"]; ok {
 		return u.returnError(w, r, http.StatusInternalServerError, "websocket: application specific 'Sec-Websocket-Extensions' headers are unsupported")
 	}
 
+	if !tokenListContainsValue(r.Header, "Connection", "upgrade") {
+		return u.returnError(w, r, http.StatusBadRequest, "websocket: not a websocket handshake: 'upgrade' token not found in 'Connection' header")
+	}
+
+	if !tokenListContainsValue(r.Header, "Upgrade", "websocket") {
+		return u.returnError(w, r, http.StatusBadRequest, "websocket: not a websocket handshake: 'websocket' token not found in 'Upgrade' header")
+	}
+
+	if !tokenListContainsValue(r.Header, "Sec-Websocket-Version", "13") {
+		return u.returnError(w, r, http.StatusBadRequest, "websocket: unsupported version: 13 not found in 'Sec-Websocket-Version' header")
+	}
+
 	checkOrigin := u.CheckOrigin
 	if checkOrigin == nil {
 		checkOrigin = checkSameOrigin
@@ -232,11 +230,10 @@ func (u *Upgrader) Upgrade(w http.ResponseWriter, r *http.Request, responseHeade
 
 // Upgrade upgrades the HTTP server connection to the WebSocket protocol.
 //
-// Deprecated: Use websocket.Upgrader instead.
+// This function is deprecated, use websocket.Upgrader instead.
 //
-// Upgrade does not perform origin checking. The application is responsible for
-// checking the Origin header before calling Upgrade. An example implementation
-// of the same origin policy check is:
+// The application is responsible for checking the request origin before
+// calling Upgrade. An example implementation of the same origin policy is:
 //
 //	if req.Header.Get("Origin") != "http://"+req.Host {
 //		http.Error(w, "Origin not allowed", 403)

vendor/github.com/gorilla/websocket/server_test.go

@@ -49,21 +49,3 @@ func TestIsWebSocketUpgrade(t *testing.T) {
 		}
 	}
 }
-
-var checkSameOriginTests = []struct {
-	ok bool
-	r  *http.Request
-}{
-	{false, &http.Request{Host: "example.org", Header: map[string][]string{"Origin": []string{"https://other.org"}}}},
-	{true, &http.Request{Host: "example.org", Header: map[string][]string{"Origin": []string{"https://example.org"}}}},
-	{true, &http.Request{Host: "Example.org", Header: map[string][]string{"Origin": []string{"https://example.org"}}}},
-}
-
-func TestCheckSameOrigin(t *testing.T) {
-	for _, tt := range checkSameOriginTests {
-		ok := checkSameOrigin(tt.r)
-		if tt.ok != ok {
-			t.Errorf("checkSameOrigin(%+v) returned %v, want %v", tt.r, ok, tt.ok)
-		}
-	}
-}

vendor/github.com/gorilla/websocket/util.go

@@ -11,7 +11,6 @@ import (
 	"io"
 	"net/http"
 	"strings"
-	"unicode/utf8"
 )
 
 var keyGUID = []byte("258EAFA5-E914-47DA-95CA-C5AB0DC85B11")
@@ -112,14 +111,14 @@ func nextTokenOrQuoted(s string) (value string, rest string) {
 				case escape:
 					escape = false
 					p[j] = b
-					j++
+					j += 1
 				case b == '\\':
 					escape = true
 				case b == '"':
 					return string(p[:j]), s[i+1:]
 				default:
 					p[j] = b
-					j++
+					j += 1
 				}
 			}
 			return "", ""
@@ -128,31 +127,8 @@ func nextTokenOrQuoted(s string) (value string, rest string) {
 	return "", ""
 }
 
-// equalASCIIFold returns true if s is equal to t with ASCII case folding.
-func equalASCIIFold(s, t string) bool {
-	for s != "" && t != "" {
-		sr, size := utf8.DecodeRuneInString(s)
-		s = s[size:]
-		tr, size := utf8.DecodeRuneInString(t)
-		t = t[size:]
-		if sr == tr {
-			continue
-		}
-		if 'A' <= sr && sr <= 'Z' {
-			sr = sr + 'a' - 'A'
-		}
-		if 'A' <= tr && tr <= 'Z' {
-			tr = tr + 'a' - 'A'
-		}
-		if sr != tr {
-			return false
-		}
-	}
-	return s == t
-}
-
 // tokenListContainsValue returns true if the 1#token header with the given
-// name contains a token equal to value with ASCII case folding.
+// name contains token.
 func tokenListContainsValue(header http.Header, name string, value string) bool {
 headers:
 	for _, s := range header[name] {
@@ -166,7 +142,7 @@ headers:
 			if s != "" && s[0] != ',' {
 				continue headers
 			}
-			if equalASCIIFold(t, value) {
+			if strings.EqualFold(t, value) {
 				return true
 			}
 			if s == "" {
@@ -180,6 +156,7 @@ headers:
 
 // parseExtensiosn parses WebSocket extensions from a header.
 func parseExtensions(header http.Header) []map[string]string {
+
 	// From RFC 6455:
 	//
 	//  Sec-WebSocket-Extensions = extension-list

vendor/github.com/gorilla/websocket/util_test.go

@@ -10,24 +10,6 @@ import (
 	"testing"
 )
 
-var equalASCIIFoldTests = []struct {
-	t, s string
-	eq   bool
-}{
-	{"WebSocket", "websocket", true},
-	{"websocket", "WebSocket", true},
-	{"Öyster", "öyster", false},
-}
-
-func TestEqualASCIIFold(t *testing.T) {
-	for _, tt := range equalASCIIFoldTests {
-		eq := equalASCIIFold(tt.s, tt.t)
-		if eq != tt.eq {
-			t.Errorf("equalASCIIFold(%q, %q) = %v, want %v", tt.s, tt.t, eq, tt.eq)
-		}
-	}
-}
-
 var tokenListContainsValueTests = []struct {
 	value string
 	ok    bool
@@ -56,32 +38,29 @@ var parseExtensionTests = []struct {
 	value      string
 	extensions []map[string]string
 }{
-	{`foo`, []map[string]string{{"": "foo"}}},
+	{`foo`, []map[string]string{map[string]string{"": "foo"}}},
 	{`foo, bar; baz=2`, []map[string]string{
-		{"": "foo"},
-		{"": "bar", "baz": "2"}}},
+		map[string]string{"": "foo"},
+		map[string]string{"": "bar", "baz": "2"}}},
 	{`foo; bar="b,a;z"`, []map[string]string{
-		{"": "foo", "bar": "b,a;z"}}},
+		map[string]string{"": "foo", "bar": "b,a;z"}}},
 	{`foo , bar; baz = 2`, []map[string]string{
-		{"": "foo"},
-		{"": "bar", "baz": "2"}}},
+		map[string]string{"": "foo"},
+		map[string]string{"": "bar", "baz": "2"}}},
 	{`foo, bar; baz=2 junk`, []map[string]string{
-		{"": "foo"}}},
+		map[string]string{"": "foo"}}},
 	{`foo junk, bar; baz=2 junk`, nil},
 	{`mux; max-channels=4; flow-control, deflate-stream`, []map[string]string{
-		{"": "mux", "max-channels": "4", "flow-control": ""},
-		{"": "deflate-stream"}}},
+		map[string]string{"": "mux", "max-channels": "4", "flow-control": ""},
+		map[string]string{"": "deflate-stream"}}},
 	{`permessage-foo; x="10"`, []map[string]string{
-		{"": "permessage-foo", "x": "10"}}},
+		map[string]string{"": "permessage-foo", "x": "10"}}},
 	{`permessage-foo; use_y, permessage-foo`, []map[string]string{
-		{"": "permessage-foo", "use_y": ""},
-		{"": "permessage-foo"}}},
+		map[string]string{"": "permessage-foo", "use_y": ""},
+		map[string]string{"": "permessage-foo"}}},
 	{`permessage-deflate; client_max_window_bits; server_max_window_bits=10 , permessage-deflate; client_max_window_bits`, []map[string]string{
-		{"": "permessage-deflate", "client_max_window_bits": "", "server_max_window_bits": "10"},
-		{"": "permessage-deflate", "client_max_window_bits": ""}}},
-	{"permessage-deflate; server_no_context_takeover; client_max_window_bits=15", []map[string]string{
-		{"": "permessage-deflate", "server_no_context_takeover": "", "client_max_window_bits": "15"},
-	}},
+		map[string]string{"": "permessage-deflate", "client_max_window_bits": "", "server_max_window_bits": "10"},
+		map[string]string{"": "permessage-deflate", "client_max_window_bits": ""}}},
 }
 
 func TestParseExtensions(t *testing.T) {

vendor/github.com/gorilla/websocket/x_net_proxy.go

@@ -1,473 +0,0 @@
-// Code generated by golang.org/x/tools/cmd/bundle. DO NOT EDIT.
-//go:generate bundle -o x_net_proxy.go golang.org/x/net/proxy
-
-// Package proxy provides support for a variety of protocols to proxy network
-// data.
-//
-
-package websocket
-
-import (
-	"errors"
-	"io"
-	"net"
-	"net/url"
-	"os"
-	"strconv"
-	"strings"
-	"sync"
-)
-
-type proxy_direct struct{}
-
-// Direct is a direct proxy: one that makes network connections directly.
-var proxy_Direct = proxy_direct{}
-
-func (proxy_direct) Dial(network, addr string) (net.Conn, error) {
-	return net.Dial(network, addr)
-}
-
-// A PerHost directs connections to a default Dialer unless the host name
-// requested matches one of a number of exceptions.
-type proxy_PerHost struct {
-	def, bypass proxy_Dialer
-
-	bypassNetworks []*net.IPNet
-	bypassIPs      []net.IP
-	bypassZones    []string
-	bypassHosts    []string
-}
-
-// NewPerHost returns a PerHost Dialer that directs connections to either
-// defaultDialer or bypass, depending on whether the connection matches one of
-// the configured rules.
-func proxy_NewPerHost(defaultDialer, bypass proxy_Dialer) *proxy_PerHost {
-	return &proxy_PerHost{
-		def:    defaultDialer,
-		bypass: bypass,
-	}
-}
-
-// Dial connects to the address addr on the given network through either
-// defaultDialer or bypass.
-func (p *proxy_PerHost) Dial(network, addr string) (c net.Conn, err error) {
-	host, _, err := net.SplitHostPort(addr)
-	if err != nil {
-		return nil, err
-	}
-
-	return p.dialerForRequest(host).Dial(network, addr)
-}
-
-func (p *proxy_PerHost) dialerForRequest(host string) proxy_Dialer {
-	if ip := net.ParseIP(host); ip != nil {
-		for _, net := range p.bypassNetworks {
-			if net.Contains(ip) {
-				return p.bypass
-			}
-		}
-		for _, bypassIP := range p.bypassIPs {
-			if bypassIP.Equal(ip) {
-				return p.bypass
-			}
-		}
-		return p.def
-	}
-
-	for _, zone := range p.bypassZones {
-		if strings.HasSuffix(host, zone) {
-			return p.bypass
-		}
-		if host == zone[1:] {
-			// For a zone ".example.com", we match "example.com"
-			// too.
-			return p.bypass
-		}
-	}
-	for _, bypassHost := range p.bypassHosts {
-		if bypassHost == host {
-			return p.bypass
-		}
-	}
-	return p.def
-}
-
-// AddFromString parses a string that contains comma-separated values
-// specifying hosts that should use the bypass proxy. Each value is either an
-// IP address, a CIDR range, a zone (*.example.com) or a host name
-// (localhost). A best effort is made to parse the string and errors are
-// ignored.
-func (p *proxy_PerHost) AddFromString(s string) {
-	hosts := strings.Split(s, ",")
-	for _, host := range hosts {
-		host = strings.TrimSpace(host)
-		if len(host) == 0 {
-			continue
-		}
-		if strings.Contains(host, "/") {
-			// We assume that it's a CIDR address like 127.0.0.0/8
-			if _, net, err := net.ParseCIDR(host); err == nil {
-				p.AddNetwork(net)
-			}
-			continue
-		}
-		if ip := net.ParseIP(host); ip != nil {
-			p.AddIP(ip)
-			continue
-		}
-		if strings.HasPrefix(host, "*.") {
-			p.AddZone(host[1:])
-			continue
-		}
-		p.AddHost(host)
-	}
-}
-
-// AddIP specifies an IP address that will use the bypass proxy. Note that
-// this will only take effect if a literal IP address is dialed. A connection
-// to a named host will never match an IP.
-func (p *proxy_PerHost) AddIP(ip net.IP) {
-	p.bypassIPs = append(p.bypassIPs, ip)
-}
-
-// AddNetwork specifies an IP range that will use the bypass proxy. Note that
-// this will only take effect if a literal IP address is dialed. A connection
-// to a named host will never match.
-func (p *proxy_PerHost) AddNetwork(net *net.IPNet) {
-	p.bypassNetworks = append(p.bypassNetworks, net)
-}
-
-// AddZone specifies a DNS suffix that will use the bypass proxy. A zone of
-// "example.com" matches "example.com" and all of its subdomains.
-func (p *proxy_PerHost) AddZone(zone string) {
-	if strings.HasSuffix(zone, ".") {
-		zone = zone[:len(zone)-1]
-	}
-	if !strings.HasPrefix(zone, ".") {
-		zone = "." + zone
-	}
-	p.bypassZones = append(p.bypassZones, zone)
-}
-
-// AddHost specifies a host name that will use the bypass proxy.
-func (p *proxy_PerHost) AddHost(host string) {
-	if strings.HasSuffix(host, ".") {
-		host = host[:len(host)-1]
-	}
-	p.bypassHosts = append(p.bypassHosts, host)
-}
-
-// A Dialer is a means to establish a connection.
-type proxy_Dialer interface {
-	// Dial connects to the given address via the proxy.
-	Dial(network, addr string) (c net.Conn, err error)
-}
-
-// Auth contains authentication parameters that specific Dialers may require.
-type proxy_Auth struct {
-	User, Password string
-}
-
-// FromEnvironment returns the dialer specified by the proxy related variables in
-// the environment.
-func proxy_FromEnvironment() proxy_Dialer {
-	allProxy := proxy_allProxyEnv.Get()
-	if len(allProxy) == 0 {
-		return proxy_Direct
-	}
-
-	proxyURL, err := url.Parse(allProxy)
-	if err != nil {
-		return proxy_Direct
-	}
-	proxy, err := proxy_FromURL(proxyURL, proxy_Direct)
-	if err != nil {
-		return proxy_Direct
-	}
-
-	noProxy := proxy_noProxyEnv.Get()
-	if len(noProxy) == 0 {
-		return proxy
-	}
-
-	perHost := proxy_NewPerHost(proxy, proxy_Direct)
-	perHost.AddFromString(noProxy)
-	return perHost
-}
-
-// proxySchemes is a map from URL schemes to a function that creates a Dialer
-// from a URL with such a scheme.
-var proxy_proxySchemes map[string]func(*url.URL, proxy_Dialer) (proxy_Dialer, error)
-
-// RegisterDialerType takes a URL scheme and a function to generate Dialers from
-// a URL with that scheme and a forwarding Dialer. Registered schemes are used
-// by FromURL.
-func proxy_RegisterDialerType(scheme string, f func(*url.URL, proxy_Dialer) (proxy_Dialer, error)) {
-	if proxy_proxySchemes == nil {
-		proxy_proxySchemes = make(map[string]func(*url.URL, proxy_Dialer) (proxy_Dialer, error))
-	}
-	proxy_proxySchemes[scheme] = f
-}
-
-// FromURL returns a Dialer given a URL specification and an underlying
-// Dialer for it to make network requests.
-func proxy_FromURL(u *url.URL, forward proxy_Dialer) (proxy_Dialer, error) {
-	var auth *proxy_Auth
-	if u.User != nil {
-		auth = new(proxy_Auth)
-		auth.User = u.User.Username()
-		if p, ok := u.User.Password(); ok {
-			auth.Password = p
-		}
-	}
-
-	switch u.Scheme {
-	case "socks5":
-		return proxy_SOCKS5("tcp", u.Host, auth, forward)
-	}
-
-	// If the scheme doesn't match any of the built-in schemes, see if it
-	// was registered by another package.
-	if proxy_proxySchemes != nil {
-		if f, ok := proxy_proxySchemes[u.Scheme]; ok {
-			return f(u, forward)
-		}
-	}
-
-	return nil, errors.New("proxy: unknown scheme: " + u.Scheme)
-}
-
-var (
-	proxy_allProxyEnv = &proxy_envOnce{
-		names: []string{"ALL_PROXY", "all_proxy"},
-	}
-	proxy_noProxyEnv = &proxy_envOnce{
-		names: []string{"NO_PROXY", "no_proxy"},
-	}
-)
-
-// envOnce looks up an environment variable (optionally by multiple
-// names) once. It mitigates expensive lookups on some platforms
-// (e.g. Windows).
-// (Borrowed from net/http/transport.go)
-type proxy_envOnce struct {
-	names []string
-	once  sync.Once
-	val   string
-}
-
-func (e *proxy_envOnce) Get() string {
-	e.once.Do(e.init)
-	return e.val
-}
-
-func (e *proxy_envOnce) init() {
-	for _, n := range e.names {
-		e.val = os.Getenv(n)
-		if e.val != "" {
-			return
-		}
-	}
-}
-
-// SOCKS5 returns a Dialer that makes SOCKSv5 connections to the given address
-// with an optional username and password. See RFC 1928 and RFC 1929.
-func proxy_SOCKS5(network, addr string, auth *proxy_Auth, forward proxy_Dialer) (proxy_Dialer, error) {
-	s := &proxy_socks5{
-		network: network,
-		addr:    addr,
-		forward: forward,
-	}
-	if auth != nil {
-		s.user = auth.User
-		s.password = auth.Password
-	}
-
-	return s, nil
-}
-
-type proxy_socks5 struct {
-	user, password string
-	network, addr  string
-	forward        proxy_Dialer
-}
-
-const proxy_socks5Version = 5
-
-const (
-	proxy_socks5AuthNone     = 0
-	proxy_socks5AuthPassword = 2
-)
-
-const proxy_socks5Connect = 1
-
-const (
-	proxy_socks5IP4    = 1
-	proxy_socks5Domain = 3
-	proxy_socks5IP6    = 4
-)
-
-var proxy_socks5Errors = []string{
-	"",
-	"general failure",
-	"connection forbidden",
-	"network unreachable",
-	"host unreachable",
-	"connection refused",
-	"TTL expired",
-	"command not supported",
-	"address type not supported",
-}
-
-// Dial connects to the address addr on the given network via the SOCKS5 proxy.
-func (s *proxy_socks5) Dial(network, addr string) (net.Conn, error) {
-	switch network {
-	case "tcp", "tcp6", "tcp4":
-	default:
-		return nil, errors.New("proxy: no support for SOCKS5 proxy connections of type " + network)
-	}
-
-	conn, err := s.forward.Dial(s.network, s.addr)
-	if err != nil {
-		return nil, err
-	}
-	if err := s.connect(conn, addr); err != nil {
-		conn.Close()
-		return nil, err
-	}
-	return conn, nil
-}
-
-// connect takes an existing connection to a socks5 proxy server,
-// and commands the server to extend that connection to target,
-// which must be a canonical address with a host and port.
-func (s *proxy_socks5) connect(conn net.Conn, target string) error {
-	host, portStr, err := net.SplitHostPort(target)
-	if err != nil {
-		return err
-	}
-
-	port, err := strconv.Atoi(portStr)
-	if err != nil {
-		return errors.New("proxy: failed to parse port number: " + portStr)
-	}
-	if port < 1 || port > 0xffff {
-		return errors.New("proxy: port number out of range: " + portStr)
-	}
-
-	// the size here is just an estimate
-	buf := make([]byte, 0, 6+len(host))
-
-	buf = append(buf, proxy_socks5Version)
-	if len(s.user) > 0 && len(s.user) < 256 && len(s.password) < 256 {
-		buf = append(buf, 2 /* num auth methods */, proxy_socks5AuthNone, proxy_socks5AuthPassword)
-	} else {
-		buf = append(buf, 1 /* num auth methods */, proxy_socks5AuthNone)
-	}
-
-	if _, err := conn.Write(buf); err != nil {
-		return errors.New("proxy: failed to write greeting to SOCKS5 proxy at " + s.addr + ": " + err.Error())
-	}
-
-	if _, err := io.ReadFull(conn, buf[:2]); err != nil {
-		return errors.New("proxy: failed to read greeting from SOCKS5 proxy at " + s.addr + ": " + err.Error())
-	}
-	if buf[0] != 5 {
-		return errors.New("proxy: SOCKS5 proxy at " + s.addr + " has unexpected version " + strconv.Itoa(int(buf[0])))
-	}
-	if buf[1] == 0xff {
-		return errors.New("proxy: SOCKS5 proxy at " + s.addr + " requires authentication")
-	}
-
-	// See RFC 1929
-	if buf[1] == proxy_socks5AuthPassword {
-		buf = buf[:0]
-		buf = append(buf, 1 /* password protocol version */)
-		buf = append(buf, uint8(len(s.user)))
-		buf = append(buf, s.user...)
-		buf = append(buf, uint8(len(s.password)))
-		buf = append(buf, s.password...)
-
-		if _, err := conn.Write(buf); err != nil {
-			return errors.New("proxy: failed to write authentication request to SOCKS5 proxy at " + s.addr + ": " + err.Error())
-		}
-
-		if _, err := io.ReadFull(conn, buf[:2]); err != nil {
-			return errors.New("proxy: failed to read authentication reply from SOCKS5 proxy at " + s.addr + ": " + err.Error())
-		}
-
-		if buf[1] != 0 {
-			return errors.New("proxy: SOCKS5 proxy at " + s.addr + " rejected username/password")
-		}
-	}
-
-	buf = buf[:0]
-	buf = append(buf, proxy_socks5Version, proxy_socks5Connect, 0 /* reserved */)
-
-	if ip := net.ParseIP(host); ip != nil {
-		if ip4 := ip.To4(); ip4 != nil {
-			buf = append(buf, proxy_socks5IP4)
-			ip = ip4
-		} else {
-			buf = append(buf, proxy_socks5IP6)
-		}
-		buf = append(buf, ip...)
-	} else {
-		if len(host) > 255 {
-			return errors.New("proxy: destination host name too long: " + host)
-		}
-		buf = append(buf, proxy_socks5Domain)
-		buf = append(buf, byte(len(host)))
-		buf = append(buf, host...)
-	}
-	buf = append(buf, byte(port>>8), byte(port))
-
-	if _, err := conn.Write(buf); err != nil {
-		return errors.New("proxy: failed to write connect request to SOCKS5 proxy at " + s.addr + ": " + err.Error())
-	}
-
-	if _, err := io.ReadFull(conn, buf[:4]); err != nil {
-		return errors.New("proxy: failed to read connect reply from SOCKS5 proxy at " + s.addr + ": " + err.Error())
-	}
-
-	failure := "unknown error"
-	if int(buf[1]) < len(proxy_socks5Errors) {
-		failure = proxy_socks5Errors[buf[1]]
-	}
-
-	if len(failure) > 0 {
-		return errors.New("proxy: SOCKS5 proxy at " + s.addr + " failed to connect: " + failure)
-	}
-
-	bytesToDiscard := 0
-	switch buf[3] {
-	case proxy_socks5IP4:
-		bytesToDiscard = net.IPv4len
-	case proxy_socks5IP6:
-		bytesToDiscard = net.IPv6len
-	case proxy_socks5Domain:
-		_, err := io.ReadFull(conn, buf[:1])
-		if err != nil {
-			return errors.New("proxy: failed to read domain length from SOCKS5 proxy at " + s.addr + ": " + err.Error())
-		}
-		bytesToDiscard = int(buf[0])
-	default:
-		return errors.New("proxy: got unknown address type " + strconv.Itoa(int(buf[3])) + " from SOCKS5 proxy at " + s.addr)
-	}
-
-	if cap(buf) < bytesToDiscard {
-		buf = make([]byte, bytesToDiscard)
-	} else {
-		buf = buf[:bytesToDiscard]
-	}
-	if _, err := io.ReadFull(conn, buf); err != nil {
-		return errors.New("proxy: failed to read address from SOCKS5 proxy at " + s.addr + ": " + err.Error())
-	}
-
-	// Also need to discard the port number
-	if _, err := io.ReadFull(conn, buf[:2]); err != nil {
-		return errors.New("proxy: failed to read port from SOCKS5 proxy at " + s.addr + ": " + err.Error())
-	}
-
-	return nil
-}