File size: 5,809 Bytes
19605ab |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 |
/**
* Module dependencies.
*/
var Socket = require('./socket');
var Emitter = require('events').EventEmitter;
var parser = require('socket.io-parser');
var hasBin = require('has-binary2');
var debug = require('debug')('socket.io:namespace');
/**
* Module exports.
*/
module.exports = exports = Namespace;
/**
* Blacklisted events.
*/
exports.events = [
'connect', // for symmetry with client
'connection',
'newListener'
];
/**
* Flags.
*/
exports.flags = [
'json',
'volatile',
'local'
];
/**
* `EventEmitter#emit` reference.
*/
var emit = Emitter.prototype.emit;
/**
* Namespace constructor.
*
* @param {Server} server instance
* @param {Socket} name
* @api private
*/
function Namespace(server, name){
this.name = name;
this.server = server;
this.sockets = {};
this.connected = {};
this.fns = [];
this.ids = 0;
this.rooms = [];
this.flags = {};
this.initAdapter();
}
/**
* Inherits from `EventEmitter`.
*/
Namespace.prototype.__proto__ = Emitter.prototype;
/**
* Apply flags from `Socket`.
*/
exports.flags.forEach(function(flag){
Object.defineProperty(Namespace.prototype, flag, {
get: function() {
this.flags[flag] = true;
return this;
}
});
});
/**
* Initializes the `Adapter` for this nsp.
* Run upon changing adapter by `Server#adapter`
* in addition to the constructor.
*
* @api private
*/
Namespace.prototype.initAdapter = function(){
this.adapter = new (this.server.adapter())(this);
};
/**
* Sets up namespace middleware.
*
* @return {Namespace} self
* @api public
*/
Namespace.prototype.use = function(fn){
if (this.server.eio && this.name === '/') {
debug('removing initial packet');
delete this.server.eio.initialPacket;
}
this.fns.push(fn);
return this;
};
/**
* Executes the middleware for an incoming client.
*
* @param {Socket} socket that will get added
* @param {Function} fn last fn call in the middleware
* @api private
*/
Namespace.prototype.run = function(socket, fn){
var fns = this.fns.slice(0);
if (!fns.length) return fn(null);
function run(i){
fns[i](socket, function(err){
// upon error, short-circuit
if (err) return fn(err);
// if no middleware left, summon callback
if (!fns[i + 1]) return fn(null);
// go on to next
run(i + 1);
});
}
run(0);
};
/**
* Targets a room when emitting.
*
* @param {String} name
* @return {Namespace} self
* @api public
*/
Namespace.prototype.to =
Namespace.prototype.in = function(name){
if (!~this.rooms.indexOf(name)) this.rooms.push(name);
return this;
};
/**
* Adds a new client.
*
* @return {Socket}
* @api private
*/
Namespace.prototype.add = function(client, query, fn){
debug('adding socket to nsp %s', this.name);
var socket = new Socket(this, client, query);
var self = this;
this.run(socket, function(err){
process.nextTick(function(){
if ('open' == client.conn.readyState) {
if (err) return socket.error(err.data || err.message);
// track socket
self.sockets[socket.id] = socket;
// it's paramount that the internal `onconnect` logic
// fires before user-set events to prevent state order
// violations (such as a disconnection before the connection
// logic is complete)
socket.onconnect();
if (fn) fn();
// fire user-set events
self.emit('connect', socket);
self.emit('connection', socket);
} else {
debug('next called after client was closed - ignoring socket');
}
});
});
return socket;
};
/**
* Removes a client. Called by each `Socket`.
*
* @api private
*/
Namespace.prototype.remove = function(socket){
if (this.sockets.hasOwnProperty(socket.id)) {
delete this.sockets[socket.id];
} else {
debug('ignoring remove for %s', socket.id);
}
};
/**
* Emits to all clients.
*
* @return {Namespace} self
* @api public
*/
Namespace.prototype.emit = function(ev){
if (~exports.events.indexOf(ev)) {
emit.apply(this, arguments);
return this;
}
// set up packet object
var args = Array.prototype.slice.call(arguments);
var packet = {
type: (this.flags.binary !== undefined ? this.flags.binary : hasBin(args)) ? parser.BINARY_EVENT : parser.EVENT,
data: args
};
if ('function' == typeof args[args.length - 1]) {
throw new Error('Callbacks are not supported when broadcasting');
}
var rooms = this.rooms.slice(0);
var flags = Object.assign({}, this.flags);
// reset flags
this.rooms = [];
this.flags = {};
this.adapter.broadcast(packet, {
rooms: rooms,
flags: flags
});
return this;
};
/**
* Sends a `message` event to all clients.
*
* @return {Namespace} self
* @api public
*/
Namespace.prototype.send =
Namespace.prototype.write = function(){
var args = Array.prototype.slice.call(arguments);
args.unshift('message');
this.emit.apply(this, args);
return this;
};
/**
* Gets a list of clients.
*
* @return {Namespace} self
* @api public
*/
Namespace.prototype.clients = function(fn){
this.adapter.clients(this.rooms, fn);
// reset rooms for scenario:
// .in('room').clients() (GH-1978)
this.rooms = [];
return this;
};
/**
* Sets the compress flag.
*
* @param {Boolean} compress if `true`, compresses the sending data
* @return {Socket} self
* @api public
*/
Namespace.prototype.compress = function(compress){
this.flags.compress = compress;
return this;
};
/**
* Sets the binary flag
*
* @param {Boolean} Encode as if it has binary data if `true`, Encode as if it doesnt have binary data if `false`
* @return {Socket} self
* @api public
*/
Namespace.prototype.binary = function (binary) {
this.flags.binary = binary;
return this;
};
|