first commit

app_vue/node_modules/faye-websocket/lib/faye/eventsource.js

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+'use strict';
+
+var Stream      = require('stream').Stream,
+    util        = require('util'),
+    driver      = require('websocket-driver'),
+    Headers     = require('websocket-driver/lib/websocket/driver/headers'),
+    API         = require('./websocket/api'),
+    EventTarget = require('./websocket/api/event_target'),
+    Event       = require('./websocket/api/event');
+
+var EventSource = function(request, response, options) {
+  this.writable = true;
+  options = options || {};
+
+  this._stream = response.socket;
+  this._ping   = options.ping  || this.DEFAULT_PING;
+  this._retry  = options.retry || this.DEFAULT_RETRY;
+
+  var scheme       = driver.isSecureRequest(request) ? 'https:' : 'http:';
+  this.url         = scheme + '//' + request.headers.host + request.url;
+  this.lastEventId = request.headers['last-event-id'] || '';
+  this.readyState  = API.CONNECTING;
+
+  var headers = new Headers(),
+      self    = this;
+
+  if (options.headers) {
+    for (var key in options.headers) headers.set(key, options.headers[key]);
+  }
+
+  if (!this._stream || !this._stream.writable) return;
+  process.nextTick(function() { self._open() });
+
+  this._stream.setTimeout(0);
+  this._stream.setNoDelay(true);
+
+  var handshake = 'HTTP/1.1 200 OK\r\n' +
+                  'Content-Type: text/event-stream\r\n' +
+                  'Cache-Control: no-cache, no-store\r\n' +
+                  'Connection: close\r\n' +
+                  headers.toString() +
+                  '\r\n' +
+                  'retry: ' + Math.floor(this._retry * 1000) + '\r\n\r\n';
+
+  this._write(handshake);
+
+  this._stream.on('drain', function() { self.emit('drain') });
+
+  if (this._ping)
+    this._pingTimer = setInterval(function() { self.ping() }, this._ping * 1000);
+
+  ['error', 'end'].forEach(function(event) {
+    self._stream.on(event, function() { self.close() });
+  });
+};
+util.inherits(EventSource, Stream);
+
+EventSource.isEventSource = function(request) {
+  if (request.method !== 'GET') return false;
+  var accept = (request.headers.accept || '').split(/\s*,\s*/);
+  return accept.indexOf('text/event-stream') >= 0;
+};
+
+var instance = {
+  DEFAULT_PING:   10,
+  DEFAULT_RETRY:  5,
+
+  _write: function(chunk) {
+    if (!this.writable) return false;
+    try {
+      return this._stream.write(chunk, 'utf8');
+    } catch (e) {
+      return false;
+    }
+  },
+
+  _open: function() {
+    if (this.readyState !== API.CONNECTING) return;
+
+    this.readyState = API.OPEN;
+
+    var event = new Event('open');
+    event.initEvent('open', false, false);
+    this.dispatchEvent(event);
+  },
+
+  write: function(message) {
+    return this.send(message);
+  },
+
+  end: function(message) {
+    if (message !== undefined) this.write(message);
+    this.close();
+  },
+
+  send: function(message, options) {
+    if (this.readyState > API.OPEN) return false;
+
+    message = String(message).replace(/(\r\n|\r|\n)/g, '$1data: ');
+    options = options || {};
+
+    var frame = '';
+    if (options.event) frame += 'event: ' + options.event + '\r\n';
+    if (options.id)    frame += 'id: '    + options.id    + '\r\n';
+    frame += 'data: ' + message + '\r\n\r\n';
+
+    return this._write(frame);
+  },
+
+  ping: function() {
+    return this._write(':\r\n\r\n');
+  },
+
+  close: function() {
+    if (this.readyState > API.OPEN) return false;
+
+    this.readyState = API.CLOSED;
+    this.writable = false;
+    if (this._pingTimer) clearInterval(this._pingTimer);
+    if (this._stream) this._stream.end();
+
+    var event = new Event('close');
+    event.initEvent('close', false, false);
+    this.dispatchEvent(event);
+
+    return true;
+  }
+};
+
+for (var method in instance) EventSource.prototype[method] = instance[method];
+for (var key in EventTarget) EventSource.prototype[key] = EventTarget[key];
+
+module.exports = EventSource;