[RESOLVED] I need help with AJAX
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  1. #1
    Join Date
    Sep 2007
    Posts
    7

    [RESOLVED] I need help with AJAX

    My AJAX code is not working please help.

    Please ignore syntax error(s) just get the idea.

    Below is my AJAX code:

    Code:
    /**
     * @author cloud
     */
    var pointer;
    function userStatus(method, url, asynchronus)
    {
    	/*
    	* Data members/Field members
    	*/
    	pointer=this;
    	this.MAX_HTTPRequestObjects=4;
    	this.log=document.getElementById("logMessages");
    	this.url=url;
    	this.method=method;
    	this.asynchronus=asynchronus;
    	this.index=0;
    	this.XMLHTTPRequestObjects=new Array();
    	this.memberName="";
    	this.memberNumber="";
    	this.memberData="";
    	this.buddyData="";
    	this.blogEntries="";
    	/*
    	 * Initialize data mebers/Field members
    	 */
    	this.getXMLHTTPRequestObjects();
    	this.getMemberData();
    	this.getBuddyData();
    	this.getBlogEntries();
    }
    
    UserStatus.prototype.getXMLHTTPRequestObjects = function(){
    	// Is it for Firefox, Safari, Opera, etcs ?
    	try 
    	{
    		for (var i = 0; i < pointer.MAX_XMLHTTPRequestObjects; i++) this.xmlHTTPRequestObjects[i] = new XMLHttpRequest();
    	} 
    	catch (e) 
    	{
    		/*
    		 * It is for Internet Explorer ?
    		 */
    		try 
    		{
    			for (var i = 0; i < pointer.MAX_XMLHTTPRequestObjects; i++) pointer.xmlHTTPRequestObjects[i] = new ActiveXObject("Msxml2.XMLHTTP");
    		} 
    		catch (e) 
    		{
    			try 
    			{
    				for (var i = 0; i < pointer.MAX_XMLHTTPRequestObjects; i++) pointer.xmlHTTPRequestObjects[i] = new ActiveXObject("Microsoft.XMLHTTP");
    			} 
    			catch (e) 
    			{
    				window.alert("Your browser does not support AJAX.");
    			}
    		}
    	}
    };
    
    UserStatus.prototype.getData(url, method, asynchronus)
    {
    	this.XMLHttpRequestObjects[this.index].onreadystatechange=this.processData;
    	this.XMLHttpRequestObjects[this.index].open(method.toUpperCase(), url, asynchronus);
    	this.XMLHttpRequestObjects[this.index].send(null);	
    };
    
    UserStatus.prototype.processData=function()
    {
    if (pointer.index==xml.MAX_XMLHTTPRequestObjects-1) return;	
    if (pointer.xmlHTTPRequestObjects[pointer.index].readyState==0) pointer.logMessage("Request not initialize.");
    	else if (pointer.xmlHTTPRequestObjects[pointer.index].readyState==1) pointer.logMessage("Request been setup.");
    	else if (pointer.xmlHTTPRequestObjects[pointer.index].readyState==2) pointer.logMessage("Request has been sent.");
    	else if (pointer.xmlHTTPRequestObjects[pointer.index].readyState==3) pointer.logMessage("Request is process.");
    	else if (pointer.xmlHTTPRequestObject.readyState==4)
    	{
    		if (pointer.index==0) parseMemberData(pointer.xmlHTTPRequestObject[pointer.index].responseText);
    		else if (pointer.index==1) parseBuddyData(pointer.xmlHTTPRequestObject[pointer.index].responseText);
    		else if (pointer.index==2) parseBlogentries(pointer.xmlHTTPRequestObject[pointer.index].responseText);
    	}
    	pointer.index++;
    };
    
    UserStatus.prototype.getMemberData=function (method, url, aysynchronus)
    {
    	this.getData(method, url, asynchronus);
    };
    
    UserStatus.prototype.getBuddyData=function (method, url, asynchronus)
    {
    	this.getData(method, url, asynchronus);
    };
    
    UserStatus.prototype.getBlogEntries=function (method, url, asynchronus)
    {
    	this.getData(method, url, asynchronus);
    };
    
    UserStatus.prototype.parseMemberData=function (memberData)
    {
    	/*
    	 * Parse member data in here
    	 */
    };
    
    userStatus.prototype.parseBuddyData=function (buddyData)
    {
    	/*
    	 * Parse buddy data in here
    	 */
    };
    
    UserStatus.prototype.parseBlogEntries=function (blogEntries)
    {
    	/*
    	 * Parse blog entries in here
    	 */
    };
    
    UserStatus.prototype.logMessage=function (message)
    {
    	this.log.value=this.log.value+messsage+"\n";
    }
    Here is one of the error:
    Code:
    [Exception... "Component returned failure code: 0xc1f30001 (NS_ERROR_NOT_INITIALIZED) [nsIXMLHttpRequest.send]"  nsresult: "0xc1f30001 (NS_ERROR_NOT_INITIALIZED)"  location: "JS frame ::"  data: no]
    Here is the other error:
    I get different responses for different requests
    I need help resolving these error.

    I solved the problem. The idea was right, but there was a logical error.
    I should have used a loop to check an array of xhr objects and use the loop
    counter as an index to direct the appropriate responses to the appropriate destinations.
    Last edited by cloud1; January 27th, 2008 at 12:31 AM. Reason: Problem got resolved

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