Is it possible to abort synchronous XmlHttpRequest?

Question

I wrote a JavaScript function that asynchronously calls a web service using XmlHttpRequest. I asked this function to complete its work before the page displays.

I thought I could make the AJAX request synchronous, but I do not want this to hang for too long - I would like to cancel the request after, say, 1 second if no response has been received.

Is it possible to abort synchronous XmlHttpRequest?

Answer 1

You can not:

http://www.hunlock.com/blogs/Snippets:_Synchronous_AJAX sais: " AJAX ( SJAX - Javascript XML) , , javascript , . , . , , , "

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Answer 2

, AJAX , JavaScript ( ).

, , , ? , setTimeout() (jQuery , ):

var result;
var xhr = $.ajax('/url', function(response) {
  result = response;
});
setTimeout(function() {
  if(result) {
    //AJAX call done within a second, proceed with rendering
  } else {
    //One second passed, no result yet, discard it and move on
    xhr.abort();
  }
}, 1000);

, AJAX.

Answer 3

XMLHttpRequest support abort, : http://www.w3.org/TR/XMLHttpRequest/#the-abort-method

, . , abort Windows Internet Explorer 7 .

send() XMLHttpRequest n , .

Answer 4

IE. timeout.

the code below worked for me

xmlhttp.open("method","url",false);
xmlhttp.timeout="time in ms";
xmlhttp.ontimeout=function(){};
xmlhttp.send();