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WebSocket-BroadCaster
Commit 0d2c4410 authored by Romain Courteaud's avatar Romain Courteaud
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Clone websocket server Chrome app sample. 

Original code can be found at:
https://github.com/GoogleChrome/chrome-app-samples/tree/master/samples/websocket-server
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<a target="_blank" href="https://chrome.google.com/webstore/detail/pkbpddppnkjmlbgliipgmhjeialadokj">![Try it now in CWS](https://raw.github.com/GoogleChrome/chrome-app-samples/master/tryitnowbutton.png "Click here to install this sample from the Chrome Web Store")</a>
# Http WebSocket Server
An example Http and WebSocket server implementation with a sample app which serves itself and allows connected clients to chat with each other. The API is very similar to NodeJS with the intention that this could be an easy drop-in replacement for a NodeJS served application.
## APIs
* [chrome.socket](http://developer.chrome.com/apps/socket.html)
* [Runtime](http://developer.chrome.com/apps/app.runtime.html)
* [Window](http://developer.chrome.com/apps/app.window.html)
## Screenshot
![screenshot](/samples/websocket-server/assets/screenshot_1280_800.png)
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chrome.app.runtime.onLaunched.addListener(function() {
chrome.app.window.create('index.html', {
innerBounds: {
width: 800,
height: 600,
minWidth: 200,
minHeight: 200,
}
});
});
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/**
* Copyright (c) 2013 The Chromium Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
**/
var http = function() {
var socket = (chrome.experimental && chrome.experimental.socket) ||
chrome.socket;
// If this does not have chrome.socket, then return an empty http namespace.
if (!socket)
return {};
// Http response code strings.
var responseMap = {
200: 'OK',
301: 'Moved Permanently',
304: 'Not Modified',
400: 'Bad Request',
401: 'Unauthorized',
403: 'Forbidden',
404: 'Not Found',
413: 'Request Entity Too Large',
414: 'Request-URI Too Long',
500: 'Internal Server Error'};
/**
* Convert from an ArrayBuffer to a string.
* @param {ArrayBuffer} buffer The array buffer to convert.
* @return {string} The textual representation of the array.
*/
var arrayBufferToString = function(buffer) {
var array = new Uint8Array(buffer);
var str = '';
for (var i = 0; i < array.length; ++i) {
str += String.fromCharCode(array[i]);
}
return str;
};
/**
* Convert from an UTF-8 array to UTF-8 string.
* @param {array} UTF-8 array
* @return {string} UTF-8 string
*/
var ary2utf8 = (function() {
var patterns = [
{pattern: '0xxxxxxx', bytes: 1},
{pattern: '110xxxxx', bytes: 2},
{pattern: '1110xxxx', bytes: 3},
{pattern: '11110xxx', bytes: 4},
{pattern: '111110xx', bytes: 5},
{pattern: '1111110x', bytes: 6}
];
patterns.forEach(function(item) {
item.header = item.pattern.replace(/[^10]/g, '');
item.pattern01 = item.pattern.replace(/[^10]/g, '0');
item.pattern01 = parseInt(item.pattern01, 2);
item.mask_length = item.header.length;
item.data_length = 8 - item.header.length;
var mask = '';
for (var i = 0, len = item.mask_length; i < len; i++) {
mask += '1';
}
for (var i = 0, len = item.data_length; i < len; i++) {
mask += '0';
}
item.mask = mask;
item.mask = parseInt(item.mask, 2);
});
return function(ary) {
var codes = [];
var cur = 0;
while(cur < ary.length) {
var first = ary[cur];
var pattern = null;
for (var i = 0, len = patterns.length; i < len; i++) {
if ((first & patterns[i].mask) == patterns[i].pattern01) {
pattern = patterns[i];
break;
}
}
if (pattern == null) {
throw 'utf-8 decode error';
}
var rest = ary.slice(cur + 1, cur + pattern.bytes);
cur += pattern.bytes;
var code = '';
code += ('00000000' + (first & (255 ^ pattern.mask)).toString(2)).slice(-pattern.data_length);
for (var i = 0, len = rest.length; i < len; i++) {
code += ('00000000' + (rest[i] & parseInt('111111', 2)).toString(2)).slice(-6);
}
codes.push(parseInt(code, 2));
}
return String.fromCharCode.apply(null, codes);
};
})();
/**
* Convert from an UTF-8 string to UTF-8 array.
* @param {string} UTF-8 string
* @return {array} UTF-8 array
*/
var utf82ary = (function() {
var patterns = [
{pattern: '0xxxxxxx', bytes: 1},
{pattern: '110xxxxx', bytes: 2},
{pattern: '1110xxxx', bytes: 3},
{pattern: '11110xxx', bytes: 4},
{pattern: '111110xx', bytes: 5},
{pattern: '1111110x', bytes: 6}
];
patterns.forEach(function(item) {
item.header = item.pattern.replace(/[^10]/g, '');
item.mask_length = item.header.length;
item.data_length = 8 - item.header.length;
item.max_bit_length = (item.bytes - 1) * 6 + item.data_length;
});
var code2utf8array = function(code) {
var pattern = null;
var code01 = code.toString(2);
for (var i = 0, len = patterns.length; i < len; i++) {
if (code01.length <= patterns[i].max_bit_length) {
pattern = patterns[i];
break;
}
}
if (pattern == null) {
throw 'utf-8 encode error';
}
var ary = [];
for (var i = 0, len = pattern.bytes - 1; i < len; i++) {
ary.unshift(parseInt('10' + ('000000' + code01.slice(-6)).slice(-6), 2));
code01 = code01.slice(0, -6);
}
ary.unshift(parseInt(pattern.header + ('00000000' + code01).slice(-pattern.data_length), 2));
return ary;
};
return function(str) {
var codes = [];
for (var i = 0, len = str.length; i < len; i++) {
var code = str.charCodeAt(i);
Array.prototype.push.apply(codes, code2utf8array(code));
}
return codes;
};
})();
/**
* Convert a string to an ArrayBuffer.
* @param {string} string The string to convert.
* @return {ArrayBuffer} An array buffer whose bytes correspond to the string.
*/
var stringToArrayBuffer = function(string) {
var buffer = new ArrayBuffer(string.length);
var bufferView = new Uint8Array(buffer);
for (var i = 0; i < string.length; i++) {
bufferView[i] = string.charCodeAt(i);
}
return buffer;
};
/**
* An event source can dispatch events. These are dispatched to all of the
* functions listening for that event type with arguments.
* @constructor
*/
function EventSource() {
this.listeners_ = {};
};
EventSource.prototype = {
/**
* Add |callback| as a listener for |type| events.
* @param {string} type The type of the event.
* @param {function(Object|undefined): boolean} callback The function to call
* when this event type is dispatched. Arguments depend on the event
* source and type. The function returns whether the event was "handled"
* which will prevent delivery to the rest of the listeners.
*/
addEventListener: function(type, callback) {
if (!this.listeners_[type])
this.listeners_[type] = [];
this.listeners_[type].push(callback);
},
/**
* Remove |callback| as a listener for |type| events.
* @param {string} type The type of the event.
* @param {function(Object|undefined): boolean} callback The callback
* function to remove from the event listeners for events having type
* |type|.
*/
removeEventListener: function(type, callback) {
if (!this.listeners_[type])
return;
for (var i = this.listeners_[type].length - 1; i >= 0; i--) {
if (this.listeners_[type][i] == callback) {
this.listeners_[type].splice(i, 1);
}
}
},
/**
* Dispatch an event to all listeners for events of type |type|.
* @param {type} type The type of the event being dispatched.
* @param {...Object} var_args The arguments to pass when calling the
* callback function.
* @return {boolean} Returns true if the event was handled.
*/
dispatchEvent: function(type, var_args) {
if (!this.listeners_[type])
return false;
for (var i = 0; i < this.listeners_[type].length; i++) {
if (this.listeners_[type][i].apply(
/* this */ null,
/* var_args */ Array.prototype.slice.call(arguments, 1))) {
return true;
}
}
}
};
/**
* HttpServer provides a lightweight Http web server. Currently it only
* supports GET requests and upgrading to other protocols (i.e. WebSockets).
* @constructor
*/
function HttpServer() {
EventSource.apply(this);
this.readyState_ = 0;
}
HttpServer.prototype = {
__proto__: EventSource.prototype,
/**
* Listen for connections on |port| using the interface |host|.
* @param {number} port The port to listen for incoming connections on.
* @param {string=} opt_host The host interface to listen for connections on.
* This will default to 0.0.0.0 if not specified which will listen on
* all interfaces.
*/
listen: function(port, opt_host) {
var t = this;
socket.create('tcp', {}, function(socketInfo) {
t.socketInfo_ = socketInfo;
socket.listen(t.socketInfo_.socketId, opt_host || '0.0.0.0', port, 50,
function(result) {
t.readyState_ = 1;
t.acceptConnection_(t.socketInfo_.socketId);
});
});
},
acceptConnection_: function(socketId) {
var t = this;
socket.accept(this.socketInfo_.socketId, function(acceptInfo) {
t.onConnection_(acceptInfo);
t.acceptConnection_(socketId);
});
},
onConnection_: function(acceptInfo) {
this.readRequestFromSocket_(acceptInfo.socketId);
},
readRequestFromSocket_: function(socketId) {
var t = this;
var requestData = '';
var endIndex = 0;
var onDataRead = function(readInfo) {
// Check if connection closed.
if (readInfo.resultCode <= 0) {
socket.disconnect(socketId);
socket.destroy(socketId);
return;
}
requestData += arrayBufferToString(readInfo.data).replace(/\r\n/g, '\n');
// Check for end of request.
endIndex = requestData.indexOf('\n\n', endIndex);
if (endIndex == -1) {
endIndex = requestData.length - 1;
socket.read(socketId, onDataRead);
return;
}
var headers = requestData.substring(0, endIndex).split('\n');
var headerMap = {};
// headers[0] should be the Request-Line
var requestLine = headers[0].split(' ');
headerMap['method'] = requestLine[0];
headerMap['url'] = requestLine[1];
headerMap['Http-Version'] = requestLine[2];
for (var i = 1; i < headers.length; i++) {
requestLine = headers[i].split(':', 2);
if (requestLine.length == 2)
headerMap[requestLine[0]] = requestLine[1].trim();
}
var request = new HttpRequest(headerMap, socketId);
t.onRequest_(request);
}
socket.read(socketId, onDataRead);
},
onRequest_: function(request) {
var type = request.headers['Upgrade'] ? 'upgrade' : 'request';
var keepAlive = request.headers['Connection'] == 'keep-alive';
if (!this.dispatchEvent(type, request))
request.close();
else if (keepAlive)
this.readRequestFromSocket_(request.socketId_);
},
};
// MIME types for common extensions.
var extensionTypes = {
'css': 'text/css',
'html': 'text/html',
'htm': 'text/html',
'jpg': 'image/jpeg',
'jpeg': 'image/jpeg',
'js': 'text/javascript',
'png': 'image/png',
'svg': 'image/svg+xml',
'txt': 'text/plain'};
/**
* Constructs an HttpRequest object which tracks all of the request headers and
* socket for an active Http request.
* @param {Object} headers The HTTP request headers.
* @param {number} socketId The socket Id to use for the response.
* @constructor
*/
function HttpRequest(headers, socketId) {
this.version = 'HTTP/1.1';
this.headers = headers;
this.responseHeaders_ = {};
this.headersSent = false;
this.socketId_ = socketId;
this.writes_ = 0;
this.bytesRemaining = 0;
this.finished_ = false;
this.readyState = 1;
}
HttpRequest.prototype = {
__proto__: EventSource.prototype,
/**
* Closes the Http request.
*/
close: function() {
// The socket for keep alive connections will be re-used by the server.
// Just stop referencing or using the socket in this HttpRequest.
if (this.headers['Connection'] != 'keep-alive') {
socket.disconnect(this.socketId_);
socket.destroy(this.socketId_);
}
this.socketId_ = 0;
this.readyState = 3;
},
/**
* Write the provided headers as a response to the request.
* @param {int} responseCode The HTTP status code to respond with.
* @param {Object} responseHeaders The response headers describing the
* response.
*/
writeHead: function(responseCode, responseHeaders) {
var headerString = this.version + ' ' + responseCode + ' ' +
(responseMap[responseCode] || 'Unknown');
this.responseHeaders_ = responseHeaders;
if (this.headers['Connection'] == 'keep-alive')
responseHeaders['Connection'] = 'keep-alive';
if (!responseHeaders['Content-Length'] && responseHeaders['Connection'] == 'keep-alive')
responseHeaders['Transfer-Encoding'] = 'chunked';
for (var i in responseHeaders) {
headerString += '\r\n' + i + ': ' + responseHeaders[i];
}
headerString += '\r\n\r\n';
this.write_(stringToArrayBuffer(headerString));
},
/**
* Writes data to the response stream.
* @param {string|ArrayBuffer} data The data to write to the stream.
*/
write: function(data) {
if (this.responseHeaders_['Transfer-Encoding'] == 'chunked') {
var newline = '\r\n';
var byteLength = (data instanceof ArrayBuffer) ? data.byteLength : data.length;
var chunkLength = byteLength.toString(16).toUpperCase() + newline;
var buffer = new ArrayBuffer(chunkLength.length + byteLength + newline.length);
var bufferView = new Uint8Array(buffer);
for (var i = 0; i < chunkLength.length; i++)
bufferView[i] = chunkLength.charCodeAt(i);
if (data instanceof ArrayBuffer) {
bufferView.set(new Uint8Array(data), chunkLength.length);
} else {
for (var i = 0; i < data.length; i++)
bufferView[chunkLength.length + i] = data.charCodeAt(i);
}
for (var i = 0; i < newline.length; i++)
bufferView[chunkLength.length + byteLength + i] = newline.charCodeAt(i);
data = buffer;
} else if (!(data instanceof ArrayBuffer)) {
data = stringToArrayBuffer(data);
}
this.write_(data);
},
/**
* Finishes the HTTP response writing |data| before closing.
* @param {string|ArrayBuffer=} opt_data Optional data to write to the stream
* before closing it.
*/
end: function(opt_data) {
if (opt_data)
this.write(opt_data);
if (this.responseHeaders_['Transfer-Encoding'] == 'chunked')
this.write('');
this.finished_ = true;
this.checkFinished_();
},
/**
* Automatically serve the given |url| request.
* @param {string} url The URL to fetch the file to be served from. This is
* retrieved via an XmlHttpRequest and served as the response to the
* request.
*/
serveUrl: function(url) {
var t = this;
var xhr = new XMLHttpRequest();
xhr.onloadend = function() {
var type = 'text/plain';
if (this.getResponseHeader('Content-Type')) {
type = this.getResponseHeader('Content-Type');
} else if (url.indexOf('.') != -1) {
var extension = url.substr(url.indexOf('.') + 1);
type = extensionTypes[extension] || type;
}
console.log('Served ' + url);
var contentLength = this.getResponseHeader('Content-Length');
if (xhr.status == 200)
contentLength = (this.response && this.response.byteLength) || 0;
t.writeHead(this.status, {
'Content-Type': type,
'Content-Length': contentLength});
t.end(this.response);
};
xhr.open('GET', url, true);
xhr.responseType = 'arraybuffer';
xhr.send();
},
write_: function(array) {
var t = this;
this.bytesRemaining += array.byteLength;
socket.write(this.socketId_, array, function(writeInfo) {
if (writeInfo.bytesWritten < 0) {
console.error('Error writing to socket, code '+writeInfo.bytesWritten);
return;
}
t.bytesRemaining -= writeInfo.bytesWritten;
t.checkFinished_();
});
},
checkFinished_: function() {
if (!this.finished_ || this.bytesRemaining > 0)
return;
this.close();
}
};
/**
* Constructs a server which is capable of accepting WebSocket connections.
* @param {HttpServer} httpServer The Http Server to listen and handle
* WebSocket upgrade requests on.
* @constructor
*/
function WebSocketServer(httpServer) {
EventSource.apply(this);
httpServer.addEventListener('upgrade', this.upgradeToWebSocket_.bind(this));
}
WebSocketServer.prototype = {
__proto__: EventSource.prototype,
upgradeToWebSocket_: function(request) {
if (request.headers['Upgrade'] != 'websocket' ||
!request.headers['Sec-WebSocket-Key']) {
return false;
}
if (this.dispatchEvent('request', new WebSocketRequest(request))) {
if (request.socketId_)
request.reject();
return true;
}
return false;
}
};
/**
* Constructs a WebSocket request object from an Http request. This invalidates
* the Http request's socket and offers accept and reject methods for accepting
* and rejecting the WebSocket upgrade request.
* @param {HttpRequest} httpRequest The HTTP request to upgrade.
*/
function WebSocketRequest(httpRequest) {
// We'll assume control of the socket for this request.
HttpRequest.apply(this, [httpRequest.headers, httpRequest.socketId_]);
httpRequest.socketId_ = 0;
}
WebSocketRequest.prototype = {
__proto__: HttpRequest.prototype,
/**
* Accepts the WebSocket request.
* @return {WebSocketServerSocket} The websocket for the accepted request.
*/
accept: function() {
// Construct WebSocket response key.
var clientKey = this.headers['Sec-WebSocket-Key'];
var toArray = function(str) {
var a = [];
for (var i = 0; i < str.length; i++) {
a.push(str.charCodeAt(i));
}
return a;
}
var toString = function(a) {
var str = '';
for (var i = 0; i < a.length; i++) {
str += String.fromCharCode(a[i]);
}
return str;
}
// Magic string used for websocket connection key hashing:
// http://en.wikipedia.org/wiki/WebSocket
var magicStr = '258EAFA5-E914-47DA-95CA-C5AB0DC85B11';
// clientKey is base64 encoded key.
clientKey += magicStr;
var sha1 = new Sha1();
sha1.reset();
sha1.update(toArray(clientKey));
var responseKey = btoa(toString(sha1.digest()));
var responseHeader = {
'Upgrade': 'websocket',
'Connection': 'Upgrade',
'Sec-WebSocket-Accept': responseKey};
if (this.headers['Sec-WebSocket-Protocol'])
responseHeader['Sec-WebSocket-Protocol'] = this.headers['Sec-WebSocket-Protocol'];
this.writeHead(101, responseHeader);
var socket = new WebSocketServerSocket(this.socketId_);
// Detach the socket so that we don't use it anymore.
this.socketId_ = 0;
return socket;
},
/**
* Rejects the WebSocket request, closing the connection.
*/
reject: function() {
this.close();
}
}
/**
* Constructs a WebSocketServerSocket using the given socketId. This should be
* a socket which has already been upgraded from an Http request.
* @param {number} socketId The socket id with an active websocket connection.
*/
function WebSocketServerSocket(socketId) {
this.socketId_ = socketId;
EventSource.apply(this);
this.readFromSocket_();
}
WebSocketServerSocket.prototype = {
__proto__: EventSource.prototype,
/**
* Send |data| on the WebSocket.
* @param {string|Array.<number>|ArrayBuffer} data The data to send over the WebSocket.
*/
send: function(data) {
// WebSocket must specify opcode when send frame.
// The opcode for data frame is 1(text) or 2(binary).
if (typeof data == 'string' || data instanceof String) {
this.sendFrame_(1, data);
} else {
this.sendFrame_(2, data);
}
},
/**
* Begin closing the WebSocket. Note that the WebSocket protocol uses a
* handshake to close the connection, so this call will begin the closing
* process.
*/
close: function() {
this.sendFrame_(8);
this.readyState = 2;
},
readFromSocket_: function() {
var t = this;
var data = [];
var message = '';
var fragmentedOp = 0;
var fragmentedMessages = [];
var onDataRead = function(readInfo) {
if (readInfo.resultCode <= 0) {
t.close_();
return;
}
if (!readInfo.data.byteLength) {
socket.read(t.socketId_, onDataRead);
return;
}
var a = new Uint8Array(readInfo.data);
for (var i = 0; i < a.length; i++)
data.push(a[i]);
while (data.length) {
var length_code = -1;
var data_start = 6;
var mask;
var fin = (data[0] & 128) >> 7;
var op = data[0] & 15;
if (data.length > 1)
length_code = data[1] & 127;
if (length_code > 125) {
if ((length_code == 126 && data.length > 7) ||
(length_code == 127 && data.length > 14)) {
if (length_code == 126) {
length_code = data[2] * 256 + data[3];
mask = data.slice(4, 8);
data_start = 8;
} else if (length_code == 127) {
length_code = 0;
for (var i = 0; i < 8; i++) {
length_code = length_code * 256 + data[2 + i];
}
mask = data.slice(10, 14);
data_start = 14;
}
} else {
length_code = -1; // Insufficient data to compute length
}
} else {
if (data.length > 5)
mask = data.slice(2, 6);
}
if (length_code > -1 && data.length >= data_start + length_code) {
var decoded = data.slice(data_start, data_start + length_code).map(function(byte, index) {
return byte ^ mask[index % 4];
});
if (op == 1) {
decoded = ary2utf8(decoded);
}
data = data.slice(data_start + length_code);
if (fin && op > 0) {
// Unfragmented message.
if (!t.onFrame_(op, decoded))
return;
} else {
// Fragmented message.
fragmentedOp = fragmentedOp || op;
fragmentedMessages.push(decoded);
if (fin) {
var joinMessage = null;
if (op == 1) {
joinMessage = fragmentedMessagess.join('');
} else {
joinMessage = fragmentedMessages.reduce(function(pre, cur) {
return Array.prototype.push.apply(pre, cur);
}, []);
}
if (!t.onFrame_(fragmentedOp, joinMessage))
return;
fragmentedOp = 0;
fragmentedMessages = [];
}
}
} else {
break; // Insufficient data, wait for more.
}
}
socket.read(t.socketId_, onDataRead);
};
socket.read(this.socketId_, onDataRead);
},
onFrame_: function(op, data) {
if (op == 1 || op == 2) {
if (typeof data == 'string' || data instanceof String) {
// Don't do anything.
} else if (Array.isArray(data)) {
data = new Uint8Array(data).buffer;
} else if (data instanceof ArrayBuffer) {
// Don't do anything.
} else {
data = data.buffer;
}
this.dispatchEvent('message', {'data': data});
} else if (op == 8) {
// A close message must be confirmed before the websocket is closed.
if (this.readyState == 1) {
this.sendFrame_(8);
} else {
this.close_();
return false;
}
}
return true;
},
sendFrame_: function(op, data) {
var t = this;
var WebsocketFrameData = function(op, data) {
var ary = data;
if (typeof data == 'string' || data instanceof String) {
ary = utf82ary(data);
}
if (Array.isArray(ary)) {
ary = new Uint8Array(ary);
}
if (ary instanceof ArrayBuffer) {
ary = new Uint8Array(ary);
}
ary = new Uint8Array(ary.buffer);
var length = ary.length;
if (ary.length > 65535)
length += 10;
else if (ary.length > 125)
length += 4;
else
length += 2;
var lengthBytes = 0;
var buffer = new ArrayBuffer(length);
var bv = new Uint8Array(buffer);
bv[0] = 128 | (op & 15); // Fin and type text.
bv[1] = ary.length > 65535 ? 127 :
(ary.length > 125 ? 126 : ary.length);
if (ary.length > 65535)
lengthBytes = 8;
else if (ary.length > 125)
lengthBytes = 2;
var len = ary.length;
for (var i = lengthBytes - 1; i >= 0; i--) {
bv[2 + i] = len & 255;
len = len >> 8;
}
var dataStart = lengthBytes + 2;
for (var i = 0; i < ary.length; i++) {
bv[dataStart + i] = ary[i];
}
return buffer;
}
var array = WebsocketFrameData(op, data || '');
socket.write(this.socketId_, array, function(writeInfo) {
if (writeInfo.resultCode < 0 ||
writeInfo.bytesWritten !== array.byteLength) {
t.close_();
}
});
},
close_: function() {
chrome.socket.disconnect(this.socketId_);
chrome.socket.destroy(this.socketId_);
this.readyState = 3;
this.dispatchEvent('close');
}
};
return {
'Server': HttpServer,
'WebSocketServer': WebSocketServer,
};
}();
index.css 0 → 100644
View file @ 0d2c4410
html,
body {
height: 100%;
margin: 0;
padding: 0;
width: 100%;
}
body {
-webkit-box-orient: vertical;
display: -webkit-box;
}
#log {
-webkit-box-flex: 1;
}
#log,
#input {
display: block;
}
index.html 0 → 100644
View file @ 0d2c4410
<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" href="index.css">
<script src="sha1.js"></script>
<script src="http.js"></script>
<script src="index.js"></script>
</head>
<body>
<textarea id="log"></textarea>
<input type="text" id="input" placeholder="Type a message to other connected clients here">
</body>
</html>
index.js 0 → 100644
View file @ 0d2c4410
function $(id) {
return document.getElementById(id);
}
function log(text) {
$('log').value += text + '\n';
}
var port = 9999;
var isServer = false;
if (http.Server && http.WebSocketServer) {
// Listen for HTTP connections.
var server = new http.Server();
var wsServer = new http.WebSocketServer(server);
server.listen(port);
isServer = true;
server.addEventListener('request', function(req) {
var url = req.headers.url;
if (url == '/')
url = '/index.html';
// Serve the pages of this chrome application.
req.serveUrl(url);
return true;
});
// A list of connected websockets.
var connectedSockets = [];
wsServer.addEventListener('request', function(req) {
log('Client connected');
var socket = req.accept();
connectedSockets.push(socket);
// When a message is received on one socket, rebroadcast it on all
// connected sockets.
socket.addEventListener('message', function(e) {
for (var i = 0; i < connectedSockets.length; i++)
connectedSockets[i].send(e.data);
});
// When a socket is closed, remove it from the list of connected sockets.
socket.addEventListener('close', function() {
log('Client disconnected');
for (var i = 0; i < connectedSockets.length; i++) {
if (connectedSockets[i] == socket) {
connectedSockets.splice(i, 1);
break;
}
}
});
return true;
});
}
document.addEventListener('DOMContentLoaded', function() {
log('This is a test of an HTTP and WebSocket server. This application is ' +
'serving its own source code on port ' + port + '. Each client ' +
'connects to the server on a WebSocket and all messages received on ' +
'one WebSocket are echoed to all connected clients - i.e. a chat ' +
'server. Enjoy!');
// FIXME: Wait for 1s so that HTTP Server socket is listening...
setTimeout(function() {
var address = isServer ? 'ws://localhost:' + port + '/' :
window.location.href.replace('http', 'ws');
var ws = new WebSocket(address);
ws.addEventListener('open', function() {
log('Connected');
});
ws.addEventListener('close', function() {
log('Connection lost');
$('input').disabled = true;
});
ws.addEventListener('message', function(e) {
log(e.data);
});
$('input').addEventListener('keydown', function(e) {
if (ws && ws.readyState == 1 && e.keyCode == 13) {
ws.send(this.value);
this.value = '';
}
});
}, 1e3);
});
manifest.json 0 → 100644
View file @ 0d2c4410
{
"name": "WebSocket Server Test",
"description": "Runs an Http and WebSocket server with a quick and dirty test chat application.",
"version": "0.3.1",
"manifest_version": 2,
"permissions": [
{"socket": [
"tcp-connect",
"tcp-listen"]}],
"app": {
"background": {
"scripts": ["background.js"]
}
}
}
sample_support_metadata.json 0 → 100644
View file @ 0d2c4410
{
"sample": "websocket-server",
"files_with_snippets": [ ],
"ios": {"works": true}
}
sha1.js 0 → 100644
View file @ 0d2c4410
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Copyright 2005 Google Inc. All Rights Reserved.
/**
* @fileoverview SHA-1 cryptographic hash.
* Variable names follow the notation in FIPS PUB 180-3:
* http://csrc.nist.gov/publications/fips/fips180-3/fips180-3_final.pdf.
*
* Usage:
* var sha1 = new goog.crypt.sha1();
* sha1.update(bytes);
* var hash = sha1.digest();
*
*/
/**
* SHA-1 cryptographic hash constructor.
*
* The properties declared here are discussed in the above algorithm document.
* @constructor
*/
var Sha1 = function() {
/**
* Holds the previous values of accumulated variables a-e in the compress_
* function.
* @type {Array.<number>}
* @private
*/
this.chain_ = [];
/**
* A buffer holding the partially computed hash result.
* @type {Array.<number>}
* @private
*/
this.buf_ = [];
/**
* An array of 80 bytes, each a part of the message to be hashed. Referred to
* as the message schedule in the docs.
* @type {Array.<number>}
* @private
*/
this.W_ = [];
/**
* Contains data needed to pad messages less than 64 bytes.
* @type {Array.<number>}
* @private
*/
this.pad_ = [];
this.pad_[0] = 128;
for (var i = 1; i < 64; ++i) {
this.pad_[i] = 0;
}
this.reset();
};
/**
* Resets the internal accumulator.
*/
Sha1.prototype.reset = function() {
this.chain_[0] = 0x67452301;
this.chain_[1] = 0xefcdab89;
this.chain_[2] = 0x98badcfe;
this.chain_[3] = 0x10325476;
this.chain_[4] = 0xc3d2e1f0;
this.inbuf_ = 0;
this.total_ = 0;
};
/**
* Internal helper performing 32 bit left rotate.
* @return {number} w rotated left by r bits.
* @private
*/
Sha1.prototype.rotl_ = function(w, r) {
return ((w << r) | (w >>> (32 - r))) & 0xffffffff;
};
/**
* Internal compress helper function.
* @param {Array} buf containing block to compress.
* @private
*/
Sha1.prototype.compress_ = function(buf) {
var W = this.W_;
// get 16 big endian words
for (var i = 0; i < 64; i += 4) {
var w = (buf[i] << 24) |
(buf[i + 1] << 16) |
(buf[i + 2] << 8) |
(buf[i + 3]);
W[i / 4] = w;
}
// expand to 80 words
for (var i = 16; i < 80; i++) {
W[i] = this.rotl_(W[i - 3] ^ W[i - 8] ^ W[i - 14] ^ W[i - 16], 1);
}
var a = this.chain_[0];
var b = this.chain_[1];
var c = this.chain_[2];
var d = this.chain_[3];
var e = this.chain_[4];
var f, k;
for (var i = 0; i < 80; i++) {
if (i < 40) {
if (i < 20) {
f = d ^ (b & (c ^ d));
k = 0x5a827999;
} else {
f = b ^ c ^ d;
k = 0x6ed9eba1;
}
} else {
if (i < 60) {
f = (b & c) | (d & (b | c));
k = 0x8f1bbcdc;
} else {
f = b ^ c ^ d;
k = 0xca62c1d6;
}
}
var t = (this.rotl_(a, 5) + f + e + k + W[i]) & 0xffffffff;
e = d;
d = c;
c = this.rotl_(b, 30);
b = a;
a = t;
}
this.chain_[0] = (this.chain_[0] + a) & 0xffffffff;
this.chain_[1] = (this.chain_[1] + b) & 0xffffffff;
this.chain_[2] = (this.chain_[2] + c) & 0xffffffff;
this.chain_[3] = (this.chain_[3] + d) & 0xffffffff;
this.chain_[4] = (this.chain_[4] + e) & 0xffffffff;
};
/**
* Adds a byte array to internal accumulator.
* @param {Array.<number>} bytes to add to digest.
* @param {number} opt_length is # of bytes to compress.
*/
Sha1.prototype.update = function(bytes, opt_length) {
if (!opt_length) {
opt_length = bytes.length;
}
var n = 0;
// Optimize for 64 byte chunks at 64 byte boundaries.
if (this.inbuf_ == 0) {
while (n + 64 < opt_length) {
this.compress_(bytes.slice(n, n + 64));
n += 64;
this.total_ += 64;
}
}
while (n < opt_length) {
this.buf_[this.inbuf_++] = bytes[n++];
this.total_++;
if (this.inbuf_ == 64) {
this.inbuf_ = 0;
this.compress_(this.buf_);
// Pick up 64 byte chunks.
while (n + 64 < opt_length) {
this.compress_(bytes.slice(n, n + 64));
n += 64;
this.total_ += 64;
}
}
}
};
/**
* @return {Array} byte[20] containing finalized hash.
*/
Sha1.prototype.digest = function() {
var digest = [];
var totalBits = this.total_ * 8;
// Add pad 0x80 0x00*.
if (this.inbuf_ < 56) {
this.update(this.pad_, 56 - this.inbuf_);
} else {
this.update(this.pad_, 64 - (this.inbuf_ - 56));
}
// Add # bits.
for (var i = 63; i >= 56; i--) {
this.buf_[i] = totalBits & 255;
totalBits >>>= 8;
}
this.compress_(this.buf_);
var n = 0;
for (var i = 0; i < 5; i++) {
for (var j = 24; j >= 0; j -= 8) {
digest[n++] = (this.chain_[i] >> j) & 255;
}
}
return digest;
};
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