Merge pull request #139 from fabrixxm/update

Experiment with on-line update

1 files changed, 157 insertions, 0 deletions

diff --git a/include/jquery.htmlstream.js b/include/jquery.htmlstream.js
new file mode 100644
index 000000000..c62c538f7
--- /dev/null
+++ b/include/jquery.htmlstream.js
@@ -0,0 +1,157 @@
+/* jQuery ajax stream plugin
+* Version 0.1
+* Copyright (C) 2009 Chris Tarquini
+* Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License (http://creativecommons.org/licenses/by-sa/3.0/)
+* Permissions beyond the scope of this license may be available by contacting petros000[at]hotmail.com.
+*/
+
+(function($) {
+
+// Save the original AJAX function
+var ajax_old = $.ajax;
+var get_old = $.get;
+var post_old =  $.post;
+var active = true;
+// Add our settings
+$.ajaxSetup({stream: false,pollInterval: 500/*, onDataRecieved: function(){}*/ });
+$.enableAjaxStream = function(enable)
+{
+if(typeof enable == 'undefined') enable = !active;
+if(!enable)
+{
+$.ajax = ajax_old;
+$.get = get_old;
+$.post = post_old;
+active = false;
+}
+else
+{
+$.ajax = ajax_stream;
+$.get = ajax_get_stream;
+$.post = ajax_post_stream;
+active = true;
+}
+
+}
+var ajax_stream = $.ajax = function(options)
+{
+//copied from original ajax function
+        options  = jQuery.extend(true, options, jQuery.extend(true, {}, jQuery.ajaxSettings, options));
+if(options.stream)
+{
+var timer = 0;
+var offset = 0;
+var xmlhttp = null;
+var lastlen = 0;
+var done = false;
+var hook = function(xhr)
+{
+xmlhttp = xhr;
+checkagain();
+}
+var fix = function(){ check('stream'); };// fixes weird bug with random numbers as arg
+var checkagain = function(){if(!done) timer = setTimeout(fix,options.pollInterval);}
+var check = function(status)
+{
+if(typeof status == 'undefined') status = "stream";
+if(xmlhttp.status < 3) return; //only get the latest packet if data has been sent
+var text = xmlhttp.responseText;
+if(status == 'stream') //if we arent streaming then just flush the buffer
+{
+if(text.length <= lastlen) { checkagain(); return;}
+lastlength = text.length;
+if(offset == text.length) { checkagain(); return;}
+}
+var pkt = text.substr(offset);
+offset =  text.length;
+if($.isFunction(options.OnDataRecieved))
+{
+options.OnDataRecieved(pkt, status, xmlhttp.responseText, xmlhttp);
+}
+if(xmlhttp.status != 4)
+checkagain();
+}
+var complete = function(xhr,s)
+{
+clearTimeout(timer);//done..stop polling
+done = true;
+// send final call
+check(s);
+}
+// If the complete callback is set create a new callback that calls the users and outs
+if($.isFunction(options.success))
+{
+var oc = options.success;
+options.success = function(xhr,s){ complete(xhr,s); oc(xhr,s);};
+
+}
+else options.success = complete;
+// Set up our hook on the beforeSend
+if($.isFunction(options.beforeSend))
+{
+var obs = options.beforeSend;
+options.beforeSend = function(xhr){ obs(xhr); hook(xhr);};
+}
+else options.beforeSend = hook;
+
+}
+ajax_old(options);
+}
+
+var ajax_get_stream = $.get = function(url,data,callback,type,stream)
+{
+	if($.isFunction(data))
+	{
+		var orgcb = callback;
+		callback = data;
+		if($.isFunction(orgcb))
+		{
+			stream = orgcb;
+		}
+		data = null;
+	}
+	if($.isFunction(type))
+	{
+		stream = type;
+		type = undefined;
+	}
+	var dostream = $.isFunction(stream);
+	return jQuery.ajax({
+					type: "GET",
+					url: url,
+					data: data,
+					success: callback,
+					dataType: type,
+					stream: dostream,
+					OnDataRecieved: stream
+			});
+
+}
+
+var ajax_post_stream = $.post = function(url,data,callback,type,stream)
+{
+        if($.isFunction(data))
+        {
+				var orgcb = callback;
+                callback = data;
+        }
+		if($.isFunction(type))
+		{
+			stream = type;
+			type = undefined;
+		}
+		var dostream = $.isFunction(stream);
+		return jQuery.ajax({
+				type: "POST",
+				url: url,
+				data: data,
+				success: callback,
+				dataType: type,
+				stream: dostream,
+				OnDataRecieved: stream
+		});
+
+}
+
+})(jQuery);	
+