How do i use setTimeout for a chat system

[gits]

what JavaScript lib do you use? jQuery? ... what errors do occur?

[sarah aziz]

jquery
No errors occur at all just not working

[gits]

... if it's not working then somwhere has to be an error. so lets start to trace that down together. you start with:

$(document).ready(function() {
    timestamp = 0;
    
    updateMsg();
    
    $("form#chatform").submit(function() {
        $.post("db.php", {
            message: $("#msg").val(),
            name: $("#name").val(),
            action: "postmsg",
            time: timestamp
        }, function(data) {
            $("#msg").empty();
            addMessages(data);
        });
        return false;
    });
});

the first request is done by updateMsg() and the second is instantly done after this by submitting some form-data. so in both success-handlers you might trace the response ... what do you get back there?

[sarah aziz]

Hey gits
I changed again to return an xml response now i want to know where to place the setTimeout

	function addMessages()
	{
			//alert($("#msg").val());
		$.ajax({
			url:"db.php",
			type:"post",
			data:"message="+$("#msg").val(),
			datatype:"xml",
			success:function(data)
			{	$("#t1").prepend('<tr><td>bullet</td><td>reply</td><td>'+$("time",data).text()+'</td><td>De</td><td>A</td><td>'+$("message",data).text()+'</td><td>Gr</td></tr>');
			}
		  });
	}

function updateMsg()
{
	$.ajax({
		url:"db.php",
		type:"post",
		datatype:"xml",
		success:function(data)
		{
			addMessages();
		}
	});
}

Thanks

[gits]

inside a success-handler and just call the method that should be called again.

[sarah aziz]

Hi Gits
HELP ME
I am going crazy
take a look at the code and tell me what do you think
Can you test it please because if it doesnt work i will kill myself

$(document).ready(function()
{
	updateMessages();

})
	function addMessages()
	{
			$.ajax({
				url:"db.php",
				type:"post",
				data:"message="+$("#msg").val()+"&action="+"post",
				success:function()
				{	
				 	updateMessages();
				}

			  });
		}
	function updateMessages()
	{
			$.ajax({
				url:"db.php",
				type:"post",
				data:"action="+"update",
				datatype:"xml",
				success:function(data)
				{		$("#t1").prepend('<tr><td>bullet</td><td>reply</td><td>'+$("time",data).text()+'</td><td>De</td><td>A</td><td>'+$("message",data).text()+'</td><td>Gr</td></tr>');
								
				}
			
			  });
	setTimeout("updateMessages",7000);			
		}

[gits]

wait a moment. let's first check what you have. is the code from post #19 working without a timeout ... so i mean ... do you get the result on the page the first time when it runs?

[sarah aziz]

It runs onone page not the other
I want when i send the message it appears on both pages

[gits]

ok i'm simply confused now. lets have a look at your latest code (i guess you use the code from post #21), since that is the latest thing that is to follow at the moment. when the doc is ready you call updateMessages( ) which itself should call updateMessages( ) after 7secs again but you have a syntax error here:

setTimeout("updateMessages", 7000);

must be:

setTimeout(updateMessages, 7000);

the better way would be to place it in the success-handler but the current calls should work then. your function addMessages() is useless now since it is never called?

and what do you mean with 2 pages? this is the first time you mention that it isn't just one?

[sarah aziz]

Hey Gits
I want to achieve chatting between 2 clients so this is why i am using setTimeout
I want when i write a message on one page it appears on the 2 pages
If you have other questions this is my email [edit]removed[edit]
bacause i want to solve this problem

[gits]

please don't post email-addresses in the technical forums, or do you want to get spammed? :) ... and at least it is against the posting rules.

to the problem: i think i don't get it quite well, let me summarize:

- you have written a webclient for a webchat-application
- you open it and log in as User A
- you are able to post msg and see the messages at this page?

-> that is the code that i saw until now ...

- now you open another page and open the client again
- you login with another user B

- here is the problem? what is not working? i don't understand what the timeout should have to do with that ... since both of the windows should use the same code?

[sarah aziz]

Hi Gits
sorry i must have forgotten the rules
yes this is what i do

yes when i login with another user there is lag in time between messages

[gits]

so the problem is the lag in time? ...

[sarah aziz]

Hey Gits the problem is that the message don't appear on same pages at the same time
I want it to appear as if both clients are chatting when i send from one page last messages appear on both pages
This is the problem

[gits]

this will not work ... you will always have to poll the messages from the client ... and in case you don't want to poll every second then you will have that delay ... that is the design of web-technology ...