HTTP "Service Streaming" and Javascript

@toicontienMay 08.2008 — #A better question is, why are you trying to stream text? Because of the cross-browser issues, and that text isn't a large amount of data, you can fake the streaming effect by progressively showing the responseText using a setTimeout or setInterval after the responseText is fully downloaded. Does your application require the text to be streamed, or is it just for eye candy?

@trevordixonauthorMay 08.2008 — #No I'm loading data as it changes. Right now it's polling the server every few seconds, and all the opening and closing of connections is wreaking havoc on the server. I want it to open one connection then keep getting the data every few seconds from that connection.

var xhReq = createXMLHttpRequest();

window.onload = function() {

setInterval(periodicXHReqCheck, 100);

xhReq.open("GET", "countdown.phtml?start=3", true);

xhReq.onreadystatechange = function() {

if (xhReq.readyState==4) { /* alert("done!"); */ }

}

xhReq.send(null);

}

function periodicXHReqCheck() {

var fullResponse = util.trim(xhReq.responseText);

var responsePatt = /^{^(.*@END@)*(.*)@END@.*$/;}

if (fullResponse.match(responsePatt)) { // At least one full response so far

var mostRecentDigit = fullResponse.replace(responsePatt, "$2");

$("response").innerHTML = mostRecentDigit;

}

}

This method, used at http://www.ajaxify.com/run/streaming/xmlHttpRequest/countdown/ works in Firefox, but Internet Explorer and Safari don't allow access to xhReq.responseText until the server's done sending the data. Is there any way to make this work in other browsers? I'll use IFrames if need be…

HTTP "Service Streaming" and Javascript

2 Comments(s) _↴

Also in #JavaScript _↴

Success!

Social

Version

HTTP "Service Streaming" and Javascript

2 Comments(s) ↴

Also in #JavaScript ↴

Success!

The web is an endless sea of information. Don't miss the boat... Subscribe!

Social

Version

2 Comments(s) _↴

Also in #JavaScript _↴