chushihua

2026-01-26 23:20:48 +08:00
commit 7b5aab0206
22521 changed files with 3300090 additions and 0 deletions
@@ -0,0 +1,69 @@
+'use strict';
+
+var EventEmitter = require('events').EventEmitter
+  , inherits = require('inherits')
+  , JSON3 = require('json3')
+  , utils = require('./utils/event')
+  , IframeTransport = require('./transport/iframe')
+  , InfoReceiverIframe = require('./info-iframe-receiver')
+  ;
+
+var debug = function() {};
+if (process.env.NODE_ENV !== 'production') {
+  debug = require('debug')('sockjs-client:info-iframe');
+}
+
+function InfoIframe(baseUrl, url) {
+  var self = this;
+  EventEmitter.call(this);
+
+  var go = function() {
+    var ifr = self.ifr = new IframeTransport(InfoReceiverIframe.transportName, url, baseUrl);
+
+    ifr.once('message', function(msg) {
+      if (msg) {
+        var d;
+        try {
+          d = JSON3.parse(msg);
+        } catch (e) {
+          debug('bad json', msg);
+          self.emit('finish');
+          self.close();
+          return;
+        }
+
+        var info = d[0], rtt = d[1];
+        self.emit('finish', info, rtt);
+      }
+      self.close();
+    });
+
+    ifr.once('close', function() {
+      self.emit('finish');
+      self.close();
+    });
+  };
+
+  // TODO this seems the same as the 'needBody' from transports
+  if (!global.document.body) {
+    utils.attachEvent('load', go);
+  } else {
+    go();
+  }
+}
+
+inherits(InfoIframe, EventEmitter);
+
+InfoIframe.enabled = function() {
+  return IframeTransport.enabled();
+};
+
+InfoIframe.prototype.close = function() {
+  if (this.ifr) {
+    this.ifr.close();
+  }
+  this.removeAllListeners();
+  this.ifr = null;
+};
+
+module.exports = InfoIframe;