[Pkg-javascript-commits] [sockjs-client] 103/434: New transport: xhr-streaming, it will duplicate functionality of xhr-polling for a moment.

[Tonnerre Lombard]

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tonnerre-guest pushed a commit to branch master
in repository sockjs-client.

commit 296b2bf1c162e71da492dcd48dfb803316550a6c
Author: Marek Majkowski <majek04 at gmail.com>
Date:   Thu Aug 25 16:37:46 2011 +0100

    New transport: xhr-streaming, it will duplicate functionality of xhr-polling for a moment.
---
 lib/index.js                    |  1 +
 lib/sockjs.js                   |  1 +
 lib/trans-iframe-eventsource.js |  2 --
 lib/trans-xhr-streaming.js      | 29 +++++++++++++++++++++++++++++
 tests/html/src/tests.coffee     |  1 +
 5 files changed, 32 insertions(+), 2 deletions(-)

diff --git a/lib/index.js b/lib/index.js
index d61dfae..1778a80 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -11,6 +11,7 @@ SockJS = (function(){
 <!-- include lib/trans-jsonp-receiver.js -->
 <!-- include lib/trans-jsonp-polling.js -->
 <!-- include lib/trans-xhr-polling.js -->
+<!-- include lib/trans-xhr-streaming.js -->
 <!-- include lib/trans-iframe.js -->
 <!-- include lib/trans-iframe-within.js -->
 <!-- include lib/trans-iframe-eventsource.js -->
diff --git a/lib/sockjs.js b/lib/sockjs.js
index 20ac833..dd8bc79 100644
--- a/lib/sockjs.js
+++ b/lib/sockjs.js
@@ -9,6 +9,7 @@ var SockJS = function(url, protocols, options) {
     that._connid = utils.random_string(8);
     that._trans_url = that._base_url + '/' + that._server + '/' + that._connid;
     that._protocols = ['websocket',
+                       'xhr-streaming',
                        'iframe-eventsource',
                        'iframe-htmlfile',
                        'xhr-polling',
diff --git a/lib/trans-iframe-eventsource.js b/lib/trans-iframe-eventsource.js
index 7296a60..bc6073e 100644
--- a/lib/trans-iframe-eventsource.js
+++ b/lib/trans-iframe-eventsource.js
@@ -30,5 +30,3 @@ EventSourceTransport.prototype.doCleanup = function() {
         that.poll = null;
     }
 };
-
-
diff --git a/lib/trans-xhr-streaming.js b/lib/trans-xhr-streaming.js
new file mode 100644
index 0000000..c38db7b
--- /dev/null
+++ b/lib/trans-xhr-streaming.js
@@ -0,0 +1,29 @@
+var XhrStreamingTransport = SockJS['xhr-streaming'] = function (ri, trans_url) {
+    var that = this;
+    that.ri = ri;
+    that.trans_url = trans_url;
+    that.send_constructor(xdrSender);
+    that.poll = new Polling(ri, XhrCorsReceiver, trans_url + '/xhr_streaming');
+};
+
+// Inheritnace
+XhrStreamingTransport.prototype = new BufferedSender();
+
+XhrStreamingTransport.prototype.doCleanup = function() {
+    var that = this;
+    if (that.poll) {
+        that.poll.abort();
+        that.poll = null;
+    }
+};
+
+// According to:
+//   http://stackoverflow.com/questions/1641507/detect-browser-support-for-cross-domain-xmlhttprequests
+//   http://hacks.mozilla.org/2009/07/cross-site-xmlhttprequest-with-cors/
+XhrStreamingTransport.enabled = function(options) {
+    if (!options.cookie && window.XDomainRequest) return true;
+    if (window.XMLHttpRequest &&
+        'withCredentials' in new XMLHttpRequest()) return true;
+    return false;
+};
+
diff --git a/tests/html/src/tests.coffee b/tests/html/src/tests.coffee
index 9ceaa21..6dc157d 100644
--- a/tests/html/src/tests.coffee
+++ b/tests/html/src/tests.coffee
@@ -239,6 +239,7 @@ test_protocol = (protocol) ->
 
 
 protocols = ['websocket',
+        'xhr-streaming',
         'iframe-eventsource',
         'iframe-htmlfile',
         'xhr-polling',

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