define ([
         "dojo/_base/array", // array.forEach array.map
         "dojo/_base/declare", // declare
         "dojo/dom",
         "dojo/io/iframe",
         "dojox/xml/parser",
         "dojo/dom-style"
        ],
		function(array, declare, dom, iframe, xmlParser, domStyle) {
	
		var ContentStreamer = declare("obno.core.stream.ContentStreamer", null, {
		
		constructor : function(serverConfig)
		{
			serverConfig = dojo.mixin({}, serverConfig);
			this._serverUrl = serverConfig.serverUrl || null;
			if (this._serverUrl == null)
			{
				return;
			}
			this._timeout = serverConfig.serverTimeout || 30000;
		},
		
		stream : function(content, expectStatusResult /*boolean*/, retContentType, onSuccess /*function*/, onError /* function */)
		{
			var postContent = content;
			this._createTemporayForm();
			var ret = null;
			var _handleAs = 'json';
			if (retContentType)
			{
				_handleAs = retContentType;
			}
			var dfr = iframe.send( 
			{
				url: this._serverUrl,
				content: postContent,
				form: this._temporaryUploadForm,
				method: "POST",	
				timeout: this._timeout,
				handleAs: _handleAs,
				error:  function(response, ioArgs)
				{
					if (!response)
					{
						//we do no know what it is, so do nothing
						return;
					}
					//cancel errors will be repored as so 
					if (!response && !expectStatusResult)
					{
						//we are ok, do not do anything
						return;
					}
					if (response.message === 'Deferred Cancelled')
					{
						//do nothing
						return;
					}
				},
				load : function(response, ioArgs)
				{
					if (onSuccess)
					{
						onSuccess(response);						
					}
				}
	
			});			
			xmlParser.removeChildren(this._temporaryUploadForm);
			return {dfr : dfr, ret : ret};
		},
		
		_createTemporayForm : function()
		{
	    	this._temporaryUploadForm = document.createElement('form');
	    	domStyle.set(this._temporaryUploadForm, 'display', 'none');
	        this._temporaryUploadForm.setAttribute("enctype","multipart/form-data");

			dojo.body().appendChild(this._temporaryUploadForm);
		}
	});
	return ContentStreamer;
});