--- a/tweetcast/client/lib/websocket-js/flash-src/src/net/gimite/websocket/WebSocket.as Mon Oct 10 15:24:28 2011 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,584 +0,0 @@
-// Copyright: Hiroshi Ichikawa <http://gimite.net/en/>
-// License: New BSD License
-// Reference: http://dev.w3.org/html5/websockets/
-// Reference: http://tools.ietf.org/html/draft-ietf-hybi-thewebsocketprotocol-10
-
-package net.gimite.websocket {
-
-import com.adobe.net.proxies.RFC2817Socket;
-import com.gsolo.encryption.SHA1;
-import com.hurlant.crypto.tls.TLSConfig;
-import com.hurlant.crypto.tls.TLSEngine;
-import com.hurlant.crypto.tls.TLSSecurityParameters;
-import com.hurlant.crypto.tls.TLSSocket;
-
-import flash.display.*;
-import flash.errors.*;
-import flash.events.*;
-import flash.external.*;
-import flash.net.*;
-import flash.system.*;
-import flash.utils.*;
-
-import mx.controls.*;
-import mx.core.*;
-import mx.events.*;
-import mx.utils.*;
-
-public class WebSocket extends EventDispatcher {
-
- private static const WEB_SOCKET_GUID:String = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
-
- private static const CONNECTING:int = 0;
- private static const OPEN:int = 1;
- private static const CLOSING:int = 2;
- private static const CLOSED:int = 3;
-
- private static const OPCODE_CONTINUATION:int = 0x00;
- private static const OPCODE_TEXT:int = 0x01;
- private static const OPCODE_BINARY:int = 0x02;
- private static const OPCODE_CLOSE:int = 0x08;
- private static const OPCODE_PING:int = 0x09;
- private static const OPCODE_PONG:int = 0x0a;
-
- private static const STATUS_NORMAL_CLOSURE:int = 1000;
- private static const STATUS_NO_CODE:int = 1005;
- private static const STATUS_CLOSED_ABNORMALLY:int = 1006;
- private static const STATUS_CONNECTION_ERROR:int = 5000;
-
- private var id:int;
- private var url:String;
- private var scheme:String;
- private var host:String;
- private var port:uint;
- private var path:String;
- private var origin:String;
- private var requestedProtocols:Array;
- private var cookie:String;
- private var headers:String;
-
- private var rawSocket:Socket;
- private var tlsSocket:TLSSocket;
- private var tlsConfig:TLSConfig;
- private var socket:Socket;
-
- private var acceptedProtocol:String;
- private var expectedDigest:String;
-
- private var buffer:ByteArray = new ByteArray();
- private var headerState:int = 0;
- private var readyState:int = CONNECTING;
-
- private var logger:IWebSocketLogger;
- private var base64Encoder:Base64Encoder = new Base64Encoder();
-
- public function WebSocket(
- id:int, url:String, protocols:Array, origin:String,
- proxyHost:String, proxyPort:int,
- cookie:String, headers:String,
- logger:IWebSocketLogger) {
- this.logger = logger;
- this.id = id;
- this.url = url;
- var m:Array = url.match(/^(\w+):\/\/([^\/:]+)(:(\d+))?(\/.*)?(\?.*)?$/);
- if (!m) fatal("SYNTAX_ERR: invalid url: " + url);
- this.scheme = m[1];
- this.host = m[2];
- var defaultPort:int = scheme == "wss" ? 443 : 80;
- this.port = parseInt(m[4]) || defaultPort;
- this.path = (m[5] || "/") + (m[6] || "");
- this.origin = origin;
- this.requestedProtocols = protocols;
- this.cookie = cookie;
- // if present and not the empty string, headers MUST end with \r\n
- // headers should be zero or more complete lines, for example
- // "Header1: xxx\r\nHeader2: yyyy\r\n"
- this.headers = headers;
-
- if (proxyHost != null && proxyPort != 0){
- if (scheme == "wss") {
- fatal("wss with proxy is not supported");
- }
- var proxySocket:RFC2817Socket = new RFC2817Socket();
- proxySocket.setProxyInfo(proxyHost, proxyPort);
- proxySocket.addEventListener(ProgressEvent.SOCKET_DATA, onSocketData);
- rawSocket = socket = proxySocket;
- } else {
- rawSocket = new Socket();
- if (scheme == "wss") {
- tlsConfig= new TLSConfig(TLSEngine.CLIENT,
- null, null, null, null, null,
- TLSSecurityParameters.PROTOCOL_VERSION);
- tlsConfig.trustAllCertificates = true;
- tlsConfig.ignoreCommonNameMismatch = true;
- tlsSocket = new TLSSocket();
- tlsSocket.addEventListener(ProgressEvent.SOCKET_DATA, onSocketData);
- socket = tlsSocket;
- } else {
- rawSocket.addEventListener(ProgressEvent.SOCKET_DATA, onSocketData);
- socket = rawSocket;
- }
- }
- rawSocket.addEventListener(Event.CLOSE, onSocketClose);
- rawSocket.addEventListener(Event.CONNECT, onSocketConnect);
- rawSocket.addEventListener(IOErrorEvent.IO_ERROR, onSocketIoError);
- rawSocket.addEventListener(SecurityErrorEvent.SECURITY_ERROR, onSocketSecurityError);
- rawSocket.connect(host, port);
- }
-
- /**
- * @return This WebSocket's ID.
- */
- public function getId():int {
- return this.id;
- }
-
- /**
- * @return this WebSocket's readyState.
- */
- public function getReadyState():int {
- return this.readyState;
- }
-
- public function getAcceptedProtocol():String {
- return this.acceptedProtocol;
- }
-
- public function send(encData:String):int {
- var data:String;
- try {
- data = decodeURIComponent(encData);
- } catch (ex:URIError) {
- logger.error("SYNTAX_ERR: URIError in send()");
- return 0;
- }
- logger.log("send: " + data);
- var dataBytes:ByteArray = new ByteArray();
- dataBytes.writeUTFBytes(data);
- if (readyState == OPEN) {
- // TODO: binary API support
- var frame:WebSocketFrame = new WebSocketFrame();
- frame.opcode = OPCODE_TEXT;
- frame.payload = dataBytes;
- if (sendFrame(frame)) {
- return -1;
- } else {
- return dataBytes.length;
- }
- } else if (readyState == CLOSING || readyState == CLOSED) {
- return dataBytes.length;
- } else {
- fatal("invalid state");
- return 0;
- }
- }
-
- public function close(
- code:int = STATUS_NO_CODE, reason:String = "", origin:String = "client"):void {
- if (code != STATUS_NORMAL_CLOSURE &&
- code != STATUS_NO_CODE &&
- code != STATUS_CONNECTION_ERROR) {
- logger.error(StringUtil.substitute(
- "Fail connection by {0}: code={1} reason={2}", origin, code, reason));
- }
- var closeConnection:Boolean =
- code == STATUS_CONNECTION_ERROR || origin == "server";
- try {
- if (readyState == OPEN && code != STATUS_CONNECTION_ERROR) {
- var frame:WebSocketFrame = new WebSocketFrame();
- frame.opcode = OPCODE_CLOSE;
- frame.payload = new ByteArray();
- if (origin == "client" && code != STATUS_NO_CODE) {
- frame.payload.writeShort(code);
- frame.payload.writeUTFBytes(reason);
- }
- sendFrame(frame);
- }
- if (closeConnection) {
- socket.close();
- }
- } catch (ex:Error) {
- logger.error("Error: " + ex.message);
- }
- if (closeConnection) {
- logger.log("closed");
- var fireErrorEvent:Boolean = readyState != CONNECTING && code == STATUS_CONNECTION_ERROR;
- readyState = CLOSED;
- if (fireErrorEvent) {
- dispatchEvent(new WebSocketEvent("error"));
- } else {
- var wasClean:Boolean = code != STATUS_CLOSED_ABNORMALLY && code != STATUS_CONNECTION_ERROR;
- var eventCode:int = code == STATUS_CONNECTION_ERROR ? STATUS_CLOSED_ABNORMALLY : code;
- dispatchCloseEvent(wasClean, eventCode, reason);
- }
- } else {
- logger.log("closing");
- readyState = CLOSING;
- }
- }
-
- private function onSocketConnect(event:Event):void {
- logger.log("connected");
-
- if (scheme == "wss") {
- logger.log("starting SSL/TLS");
- tlsSocket.startTLS(rawSocket, host, tlsConfig);
- }
-
- var defaultPort:int = scheme == "wss" ? 443 : 80;
- var hostValue:String = host + (port == defaultPort ? "" : ":" + port);
- var key:String = generateKey();
-
- SHA1.b64pad = "=";
- expectedDigest = SHA1.b64_sha1(key + WEB_SOCKET_GUID);
-
- var opt:String = "";
- if (requestedProtocols.length > 0) {
- opt += "Sec-WebSocket-Protocol: " + requestedProtocols.join(",") + "\r\n";
- }
- // if caller passes additional headers they must end with "\r\n"
- if (headers) opt += headers;
-
- var req:String = StringUtil.substitute(
- "GET {0} HTTP/1.1\r\n" +
- "Host: {1}\r\n" +
- "Upgrade: websocket\r\n" +
- "Connection: Upgrade\r\n" +
- "Sec-WebSocket-Key: {2}\r\n" +
- "Sec-WebSocket-Origin: {3}\r\n" +
- "Sec-WebSocket-Version: 8\r\n" +
- "Cookie: {4}\r\n" +
- "{5}" +
- "\r\n",
- path, hostValue, key, origin, cookie, opt);
- logger.log("request header:\n" + req);
- socket.writeUTFBytes(req);
- socket.flush();
- }
-
- private function onSocketClose(event:Event):void {
- logger.log("closed");
- readyState = CLOSED;
- dispatchCloseEvent(false, STATUS_CLOSED_ABNORMALLY, "");
- }
-
- private function onSocketIoError(event:IOErrorEvent):void {
- var message:String;
- if (readyState == CONNECTING) {
- message = "cannot connect to Web Socket server at " + url + " (IoError: " + event.text + ")";
- } else {
- message =
- "error communicating with Web Socket server at " + url +
- " (IoError: " + event.text + ")";
- }
- onConnectionError(message);
- }
-
- private function onSocketSecurityError(event:SecurityErrorEvent):void {
- var message:String;
- if (readyState == CONNECTING) {
- message =
- "cannot connect to Web Socket server at " + url + " (SecurityError: " + event.text + ")\n" +
- "make sure the server is running and Flash socket policy file is correctly placed";
- } else {
- message =
- "error communicating with Web Socket server at " + url +
- " (SecurityError: " + event.text + ")";
- }
- onConnectionError(message);
- }
-
- private function onConnectionError(message:String):void {
- if (readyState == CLOSED) return;
- logger.error(message);
- close(STATUS_CONNECTION_ERROR);
- }
-
- private function onSocketData(event:ProgressEvent):void {
- var pos:int = buffer.length;
- socket.readBytes(buffer, pos);
- for (; pos < buffer.length; ++pos) {
- if (headerState < 4) {
- // try to find "\r\n\r\n"
- if ((headerState == 0 || headerState == 2) && buffer[pos] == 0x0d) {
- ++headerState;
- } else if ((headerState == 1 || headerState == 3) && buffer[pos] == 0x0a) {
- ++headerState;
- } else {
- headerState = 0;
- }
- if (headerState == 4) {
- var headerStr:String = readUTFBytes(buffer, 0, pos + 1);
- logger.log("response header:\n" + headerStr);
- if (!validateHandshake(headerStr)) return;
- removeBufferBefore(pos + 1);
- pos = -1;
- readyState = OPEN;
- this.dispatchEvent(new WebSocketEvent("open"));
- }
- } else {
- var frame:WebSocketFrame = parseFrame();
- if (frame) {
- removeBufferBefore(frame.length);
- pos = -1;
- if (frame.rsv != 0) {
- close(1002, "RSV must be 0.");
- } else if (frame.opcode >= 0x08 && frame.opcode <= 0x0f && frame.payload.length >= 126) {
- close(1004, "Payload of control frame must be less than 126 bytes.");
- } else {
- switch (frame.opcode) {
- case OPCODE_CONTINUATION:
- close(1003, "Received continuation frame, which is not implemented.");
- break;
- case OPCODE_TEXT:
- var data:String = readUTFBytes(frame.payload, 0, frame.payload.length);
- try {
- this.dispatchEvent(new WebSocketEvent("message", encodeURIComponent(data)));
- } catch (ex:URIError) {
- close(1007, "URIError while encoding the received data.");
- }
- break;
- case OPCODE_BINARY:
- close(1003, "Received binary data, which is not supported.");
- break;
- case OPCODE_CLOSE:
- // Extracts code and reason string.
- var code:int = STATUS_NO_CODE;
- var reason:String = "";
- if (frame.payload.length >= 2) {
- frame.payload.endian = Endian.BIG_ENDIAN;
- frame.payload.position = 0;
- code = frame.payload.readUnsignedShort();
- reason = readUTFBytes(frame.payload, 2, frame.payload.length - 2);
- }
- logger.log("received closing frame");
- close(code, reason, "server");
- break;
- case OPCODE_PING:
- sendPong(frame.payload);
- break;
- case OPCODE_PONG:
- break;
- default:
- close(1002, "Received unknown opcode: " + frame.opcode);
- break;
- }
- }
- }
- }
- }
- }
-
- private function validateHandshake(headerStr:String):Boolean {
- var lines:Array = headerStr.split(/\r\n/);
- if (!lines[0].match(/^HTTP\/1.1 101 /)) {
- onConnectionError("bad response: " + lines[0]);
- return false;
- }
- var header:Object = {};
- var lowerHeader:Object = {};
- for (var i:int = 1; i < lines.length; ++i) {
- if (lines[i].length == 0) continue;
- var m:Array = lines[i].match(/^(\S+): (.*)$/);
- if (!m) {
- onConnectionError("failed to parse response header line: " + lines[i]);
- return false;
- }
- header[m[1].toLowerCase()] = m[2];
- lowerHeader[m[1].toLowerCase()] = m[2].toLowerCase();
- }
- if (lowerHeader["upgrade"] != "websocket") {
- onConnectionError("invalid Upgrade: " + header["Upgrade"]);
- return false;
- }
- if (lowerHeader["connection"] != "upgrade") {
- onConnectionError("invalid Connection: " + header["Connection"]);
- return false;
- }
- if (!lowerHeader["sec-websocket-accept"]) {
- onConnectionError(
- "The WebSocket server speaks old WebSocket protocol, " +
- "which is not supported by web-socket-js. " +
- "It requires WebSocket protocol HyBi 10. " +
- "Try newer version of the server if available.");
- return false;
- }
- var replyDigest:String = header["sec-websocket-accept"]
- if (replyDigest != expectedDigest) {
- onConnectionError("digest doesn't match: " + replyDigest + " != " + expectedDigest);
- return false;
- }
- if (requestedProtocols.length > 0) {
- acceptedProtocol = header["sec-websocket-protocol"];
- if (requestedProtocols.indexOf(acceptedProtocol) < 0) {
- onConnectionError("protocol doesn't match: '" +
- acceptedProtocol + "' not in '" + requestedProtocols.join(",") + "'");
- return false;
- }
- }
- return true;
- }
-
- private function sendPong(payload:ByteArray):Boolean {
- var frame:WebSocketFrame = new WebSocketFrame();
- frame.opcode = OPCODE_PONG;
- frame.payload = payload;
- return sendFrame(frame);
- }
-
- private function sendFrame(frame:WebSocketFrame):Boolean {
-
- var plength:uint = frame.payload.length;
-
- // Generates a mask.
- var mask:ByteArray = new ByteArray();
- for (var i:int = 0; i < 4; i++) {
- mask.writeByte(randomInt(0, 255));
- }
-
- var header:ByteArray = new ByteArray();
- // FIN + RSV + opcode
- header.writeByte((frame.fin ? 0x80 : 0x00) | (frame.rsv << 4) | frame.opcode);
- if (plength <= 125) {
- header.writeByte(0x80 | plength); // Masked + length
- } else if (plength > 125 && plength < 65536) {
- header.writeByte(0x80 | 126); // Masked + 126
- header.writeShort(plength);
- } else if (plength >= 65536 && plength < 4294967296) {
- header.writeByte(0x80 | 127); // Masked + 127
- header.writeUnsignedInt(0); // zero high order bits
- header.writeUnsignedInt(plength);
- } else {
- fatal("Send frame size too large");
- }
- header.writeBytes(mask);
-
- var maskedPayload:ByteArray = new ByteArray();
- maskedPayload.length = frame.payload.length;
- for (i = 0; i < frame.payload.length; i++) {
- maskedPayload[i] = mask[i % 4] ^ frame.payload[i];
- }
-
- try {
- socket.writeBytes(header);
- socket.writeBytes(maskedPayload);
- socket.flush();
- } catch (ex:IOError) {
- logger.error("IOError while sending frame");
- // TODO Fire close event if it hasn't
- readyState = CLOSED;
- return false;
- }
- return true;
-
- }
-
- private function parseFrame():WebSocketFrame {
-
- var frame:WebSocketFrame = new WebSocketFrame();
- var hlength:uint = 0;
- var plength:uint = 0;
-
- hlength = 2;
- if (buffer.length < hlength) {
- return null;
- }
-
- frame.fin = (buffer[0] & 0x80) != 0;
- frame.rsv = (buffer[0] & 0x70) >> 4;
- frame.opcode = buffer[0] & 0x0f;
- plength = buffer[1] & 0x7f;
-
- if (plength == 126) {
-
- hlength = 4;
- if (buffer.length < hlength) {
- return null;
- }
- buffer.endian = Endian.BIG_ENDIAN;
- buffer.position = 2;
- plength = buffer.readUnsignedShort();
-
- } else if (plength == 127) {
-
- hlength = 10;
- if (buffer.length < hlength) {
- return null;
- }
- buffer.endian = Endian.BIG_ENDIAN;
- buffer.position = 2;
- // Protocol allows 64-bit length, but we only handle 32-bit
- var big:uint = buffer.readUnsignedInt(); // Skip high 32-bits
- plength = buffer.readUnsignedInt(); // Low 32-bits
- if (big != 0) {
- fatal("Frame length exceeds 4294967295. Bailing out!");
- return null;
- }
-
- }
-
- if (buffer.length < hlength + plength) {
- return null;
- }
-
- frame.length = hlength + plength;
- frame.payload = new ByteArray();
- buffer.position = hlength;
- buffer.readBytes(frame.payload, 0, plength);
- return frame;
-
- }
-
- private function dispatchCloseEvent(wasClean:Boolean, code:int, reason:String):void {
- var event:WebSocketEvent = new WebSocketEvent("close");
- event.wasClean = wasClean;
- event.code = code;
- event.reason = reason;
- dispatchEvent(event);
- }
-
- private function removeBufferBefore(pos:int):void {
- if (pos == 0) return;
- var nextBuffer:ByteArray = new ByteArray();
- buffer.position = pos;
- buffer.readBytes(nextBuffer);
- buffer = nextBuffer;
- }
-
- private function generateKey():String {
- var vals:ByteArray = new ByteArray();
- vals.length = 16;
- for (var i:int = 0; i < vals.length; ++i) {
- vals[i] = randomInt(0, 127);
- }
- base64Encoder.reset();
- base64Encoder.encodeBytes(vals);
- return base64Encoder.toString();
- }
-
- private function readUTFBytes(buffer:ByteArray, start:int, numBytes:int):String {
- buffer.position = start;
- var data:String = "";
- for(var i:int = start; i < start + numBytes; ++i) {
- // Workaround of a bug of ByteArray#readUTFBytes() that bytes after "\x00" is discarded.
- if (buffer[i] == 0x00) {
- data += buffer.readUTFBytes(i - buffer.position) + "\x00";
- buffer.position = i + 1;
- }
- }
- data += buffer.readUTFBytes(start + numBytes - buffer.position);
- return data;
- }
-
- private function randomInt(min:uint, max:uint):uint {
- return min + Math.floor(Math.random() * (Number(max) - min + 1));
- }
-
- private function fatal(message:String):void {
- logger.error(message);
- throw message;
- }
-
-}
-
-}