Mercurial > eldonilo > lightstring

diff bosh.js @ 99:f14558915187

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bosh support
author Sonny Piers <sonny.piers@gmail.com>
date Tue, 12 Jun 2012 19:44:53 +0200
parents
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new file mode 100644
--- /dev/null
+++ b/bosh.js
@@ -0,0 +1,215 @@
+'use strict';
+
+(function() {
+  Lightstring.BOSHConnection = function(aService) {
+    this.service = aService;
+    this.rid = 1337;
+    this.currentRequests = 0;
+    this.maxHTTPRetries = 5;
+    this.maxRequests = 2;
+    this.queue = [];
+  };
+  Lightstring.BOSHConnection.prototype = new EventEmitter();
+  Lightstring.BOSHConnection.prototype.open = function() {
+    var that = this;
+
+    var attrs = {
+      wait: '60',
+      hold: '1',
+      to: 'yuilop',
+      content: 'text/xml; charset=utf-8',
+      ver: '1.6',
+      'xmpp:version': '1.0',
+      'xmlns:xmpp': 'urn:xmpp:xbosh',
+    };
+
+    this.request(attrs, null, function(data) {
+      that.emit('open');
+      that.sid = data.getAttribute('sid');
+      that.maxRequests = data.getAttribute('maxRequests') || that.maxRequests;
+    });
+
+
+    this.on('in', function(stanza) {
+      if (stanza.localName === 'success') {
+        that.request({
+          'xmpp:restart': 'true',
+          'xmlns:xmpp': 'urn:xmpp:xbosh'
+        })
+      }
+    })
+  };
+  Lightstring.BOSHConnection.prototype.request = function(attrs, children, aOnSuccess, aOnError, aRetry) {
+    // if (children && children[0] && children[0].name === 'body') {
+    //   var body = children[0];
+    // }
+    // else {
+    //   var body = new ltx.Element('body');
+    //   if (children) {
+    //     if(util.isArray(children))
+    //       for (var k in children)
+    //         body.cnode(children[k]);
+    //     else
+    //       body.cnode(children);
+    //   }
+    // }
+
+    var body = '<body rid="' + this.rid++ + '"  xmlns="http://jabber.org/protocol/httpbind"/>';
+    var body = Lightstring.XML2DOM(body);
+
+    //sid
+    if (this.sid)
+      body.setAttribute('sid', this.sid);
+
+    //attributes on body
+    for (var i in attrs)
+      body.setAttribute(i, attrs[i]);
+
+    //children
+    for (var i in children)
+      body.appendChild(children[i]);
+
+
+
+    var retry = aRetry || 0;
+
+    var req = new XMLHttpRequest();
+    req.open('POST', this.service);
+
+
+    // req.upload.addEventListener("progress", updateProgress, false);
+    // req.upload.addEventListener("load", transferComplete, false);
+    // req.upload.addEventListener("error", transferFailed, false);
+    // req.upload.addEventListener("abort", transferCanceled, false);
+
+    // req.addEventListener("progress", updateProgress, false);
+    // req.addEventListener("load", transferComplete, false);
+    // req.addEventListener("error", transferFailed, false);
+    // req.addEventListener("abort", transferCanceled, false);
+
+    var that = this;
+    // req.responseType = 'document';
+    req.addEventListener("load", function() {
+      if (req.status < 200 || req.status >= 400) {
+        that.emit('error', "HTTP status " + req.status);
+        that.emit('close');
+        return;
+      }
+      that.currentRequests--;
+
+      var body = this.response;
+      that.emit('rawin', body);
+      var bodyEl = Lightstring.XML2DOM(body);
+      that.processResponse(bodyEl)
+      if (aOnSuccess)
+        aOnSuccess(bodyEl);
+
+    }, false);
+    // req.on('error', function(error) {
+    //   if (retry < that.maxHTTPRetries) {
+    //     that.request(attrs, children, aOnSuccess, aOnError, ++retry);
+    //   }
+    //   else {
+    //     that.emit('close');
+    //     that.emit('error', error);
+    //     if (aOnError)
+    //       aOnError(error);
+    //   }
+    // });
+    // this.emit('rawout', body.toString());
+
+    for(var i = 0; i < body.children.length; i++) {
+      var child = body.children[i];
+      that.emit('out', child);
+    }
+    this.emit('rawout', Lightstring.DOM2XML(body))
+
+    req.send(Lightstring.DOM2XML(body));
+    this.currentRequests++;
+  };
+  Lightstring.BOSHConnection.prototype.send = function(aData) {
+    if (!aData) {
+      var el = '';
+    }
+
+    else if(typeof aData == 'string') {
+      try {
+        var el = Lightstring.XML2DOM(aData);
+      }
+      catch(e) {
+        console.log(e);
+        console.log(aData);
+      }
+    }
+    else {
+      var el = aData.root();
+    }
+
+    var that = this;
+
+    this.queue.push(el);
+
+    setTimeout(this.mayRequest.bind(this), 0)
+
+  };
+  Lightstring.BOSHConnection.prototype.end = function(stanzas) {
+      var that = this;
+
+      stanzas = stanzas || [];
+      if (typeof stanzas !== 'array')
+        stanzas = [stanzas];
+
+      stanzas = this.queue.concat(stanzas);
+      this.queue = [];
+      this.request({type: 'terminate'}, stanzas,
+        function(err, bodyEl) {
+          that.emit('end');
+          that.emit('close');
+          delete that.sid;
+      });
+  };
+  Lightstring.BOSHConnection.prototype.processResponse = function(bodyEl) {
+    if (bodyEl && bodyEl.children) {
+      for(var i = 0; i < bodyEl.children.length; i++) {
+        var child = bodyEl.children[i];
+        this.emit('in', child);
+      }
+    }
+    if (bodyEl && bodyEl.getAttribute('type') === 'terminate') {
+      var condition = bodyEl.getAttribute('condition');
+      this.emit('error',
+        new Error(condition || "Session terminated"));
+      this.emit('close');
+    }
+  };
+  Lightstring.BOSHConnection.prototype.mayRequest = function() {
+    var canRequest =
+      this.sid && (this.currentRequests === 0 || ((this.queue.length > 0 && this.currentRequests < this.maxRequests))
+    );
+
+    if (!canRequest)
+      return;
+
+    var stanzas = this.queue;
+    this.queue = [];
+    //~ this.rid++;
+
+    var that = this;
+    this.request({}, stanzas,
+      //success
+      function(data) {
+        //if (data)
+          //that.processResponse(data);
+
+        setTimeout(that.mayRequest.bind(that), 0);
+
+      },
+      //error
+      function(error) {
+        that.emit('error', error);
+        that.emit('close');
+        delete that.sid;
+      }
+    );
+  };
+})();
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