commit e05c31d80217403d0a01b46b5954ff816bd34eb0 Author: David Fifield <david@bamsoftware.com> Date: Mon Nov 26 01:16:46 2012 -0800 Add a websocketConn with Read and Write methods. --- websocket-transport/websocket-server.go | 65 +++++++++++++++++++++++++++++++ 1 files changed, 65 insertions(+), 0 deletions(-) diff --git a/websocket-transport/websocket-server.go b/websocket-transport/websocket-server.go index 3874ea9..c005d7e 100644 --- a/websocket-transport/websocket-server.go +++ b/websocket-transport/websocket-server.go @@ -1,6 +1,8 @@ package main import ( + "encoding/base64" + "errors" "fmt" "net" "net/http" @@ -18,6 +20,69 @@ func logDebug(format string, v ...interface{}) { fmt.Fprintf(os.Stderr, format+"\n", v...) } +type websocketConn struct { + Ws *websocket + Base64 bool + messageBuf []byte +} + +func (conn *websocketConn) Read(b []byte) (n int, err error) { + for len(conn.messageBuf) == 0 { + var m websocketMessage + m, err = conn.Ws.ReadMessage() + if err != nil { + return + } + if conn.Base64 { + if m.Opcode != 1 { + err = errors.New(fmt.Sprintf("got non-text opcode %d with the base64 subprotocol", m.Opcode)) + return + } + conn.messageBuf = make([]byte, base64.StdEncoding.DecodedLen(len(m.Payload))) + var num int + num, err = base64.StdEncoding.Decode(conn.messageBuf, m.Payload) + if err != nil { + return + } + conn.messageBuf = conn.messageBuf[:num] + } else { + if m.Opcode != 2 { + err = errors.New(fmt.Sprintf("got non-binary opcode %d with no subprotocol", m.Opcode)) + return + } + conn.messageBuf = m.Payload + } + } + + n = copy(b, conn.messageBuf) + conn.messageBuf = conn.messageBuf[n:] + + return +} + +func (conn *websocketConn) Write(b []byte) (n int, err error) { + if conn.Base64 { + buf := make([]byte, base64.StdEncoding.EncodedLen(len(b))) + base64.StdEncoding.Encode(buf, b) + err = conn.Ws.WriteMessage(1, buf) + if err != nil { + return + } + n = len(b) + } else { + err = conn.Ws.WriteMessage(2, b) + n = len(b) + } + return +} + +func NewWebsocketConn(ws *websocket) websocketConn { + var conn websocketConn + conn.Ws = ws + conn.Base64 = (ws.Subprotocol == "base64") + return conn +} + func websocketHandler(ws *websocket) { fmt.Printf("blah\n") }