diff options
Diffstat (limited to 'vendor/github.com/gorilla/websocket/client.go')
| -rw-r--r-- | vendor/github.com/gorilla/websocket/client.go | 60 |
1 files changed, 51 insertions, 9 deletions
diff --git a/vendor/github.com/gorilla/websocket/client.go b/vendor/github.com/gorilla/websocket/client.go index a353e185..43a87c75 100644 --- a/vendor/github.com/gorilla/websocket/client.go +++ b/vendor/github.com/gorilla/websocket/client.go @@ -23,6 +23,8 @@ import ( // invalid. var ErrBadHandshake = errors.New("websocket: bad handshake") +var errInvalidCompression = errors.New("websocket: invalid compression negotiation") + // NewClient creates a new client connection using the given net connection. // The URL u specifies the host and request URI. Use requestHeader to specify // the origin (Origin), subprotocols (Sec-WebSocket-Protocol) and cookies @@ -64,12 +66,24 @@ type Dialer struct { // HandshakeTimeout specifies the duration for the handshake to complete. HandshakeTimeout time.Duration - // Input and output buffer sizes. If the buffer size is zero, then a - // default value of 4096 is used. + // ReadBufferSize and WriteBufferSize specify I/O buffer sizes. If a buffer + // size is zero, then a useful default size is used. The I/O buffer sizes + // do not limit the size of the messages that can be sent or received. ReadBufferSize, WriteBufferSize int // Subprotocols specifies the client's requested subprotocols. Subprotocols []string + + // EnableCompression specifies if the client should attempt to negotiate + // per message compression (RFC 7692). Setting this value to true does not + // guarantee that compression will be supported. Currently only "no context + // takeover" modes are supported. + EnableCompression bool + + // Jar specifies the cookie jar. + // If Jar is nil, cookies are not sent in requests and ignored + // in responses. + Jar http.CookieJar } var errMalformedURL = errors.New("malformed ws or wss URL") @@ -83,7 +97,6 @@ func parseURL(s string) (*url.URL, error) { // // ws-URI = "ws:" "//" host [ ":" port ] path [ "?" query ] // wss-URI = "wss:" "//" host [ ":" port ] path [ "?" query ] - var u url.URL switch { case strings.HasPrefix(s, "ws://"): @@ -193,6 +206,13 @@ func (d *Dialer) Dial(urlStr string, requestHeader http.Header) (*Conn, *http.Re Host: u.Host, } + // Set the cookies present in the cookie jar of the dialer + if d.Jar != nil { + for _, cookie := range d.Jar.Cookies(u) { + req.AddCookie(cookie) + } + } + // Set the request headers using the capitalization for names and values in // RFC examples. Although the capitalization shouldn't matter, there are // servers that depend on it. The Header.Set method is not used because the @@ -214,6 +234,7 @@ func (d *Dialer) Dial(urlStr string, requestHeader http.Header) (*Conn, *http.Re k == "Connection" || k == "Sec-Websocket-Key" || k == "Sec-Websocket-Version" || + k == "Sec-Websocket-Extensions" || (k == "Sec-Websocket-Protocol" && len(d.Subprotocols) > 0): return nil, nil, errors.New("websocket: duplicate header not allowed: " + k) default: @@ -221,6 +242,10 @@ func (d *Dialer) Dial(urlStr string, requestHeader http.Header) (*Conn, *http.Re } } + if d.EnableCompression { + req.Header.Set("Sec-Websocket-Extensions", "permessage-deflate; server_no_context_takeover; client_no_context_takeover") + } + hostPort, hostNoPort := hostPortNoPort(u) var proxyURL *url.URL @@ -298,12 +323,8 @@ func (d *Dialer) Dial(urlStr string, requestHeader http.Header) (*Conn, *http.Re } if u.Scheme == "https" { - cfg := d.TLSClientConfig - if cfg == nil { - cfg = &tls.Config{ServerName: hostNoPort} - } else if cfg.ServerName == "" { - shallowCopy := *cfg - cfg = &shallowCopy + cfg := cloneTLSConfig(d.TLSClientConfig) + if cfg.ServerName == "" { cfg.ServerName = hostNoPort } tlsConn := tls.Client(netConn, cfg) @@ -328,6 +349,13 @@ func (d *Dialer) Dial(urlStr string, requestHeader http.Header) (*Conn, *http.Re if err != nil { return nil, nil, err } + + if d.Jar != nil { + if rc := resp.Cookies(); len(rc) > 0 { + d.Jar.SetCookies(u, rc) + } + } + if resp.StatusCode != 101 || !strings.EqualFold(resp.Header.Get("Upgrade"), "websocket") || !strings.EqualFold(resp.Header.Get("Connection"), "upgrade") || @@ -341,6 +369,20 @@ func (d *Dialer) Dial(urlStr string, requestHeader http.Header) (*Conn, *http.Re return nil, resp, ErrBadHandshake } + for _, ext := range parseExtensions(resp.Header) { + if ext[""] != "permessage-deflate" { + continue + } + _, snct := ext["server_no_context_takeover"] + _, cnct := ext["client_no_context_takeover"] + if !snct || !cnct { + return nil, resp, errInvalidCompression + } + conn.newCompressionWriter = compressNoContextTakeover + conn.newDecompressionReader = decompressNoContextTakeover + break + } + resp.Body = ioutil.NopCloser(bytes.NewReader([]byte{})) conn.subprotocol = resp.Header.Get("Sec-Websocket-Protocol") |