71985 2011-11-09 18:08:37 -0800 XMLHttpRequest: multiple open() do not trigger multiple readystatechange events 2013-02-11 14:19:32 -0800 1 1 1 Unclassified WebKit XML 528+ (Nightly build) All All RESOLVED DUPLICATE 46012 P2 Normal --- 0 deqing.huang webkit-unassigned annevk ap jchaffraix oldest_to_newest 499558 0 deqing.huang 2011-11-09 18:08:37 -0800 According to the XHR spec, a readystatechange event should be fired after the open() method is invoked. But when invoking open() for multiple times, the readystatechange event is seen only once. TEST: http://tc.labs.opera.com/apis/XMLHttpRequest/open-open-send.htm This test case passes in FireFox7 499712 1 deqing.huang 2011-11-10 00:44:22 -0800 Checking WebCore code I found following comments in XMLHttpRequest::open() // Check previous state to avoid dispatching readyState event // when calling open several times in a row. So apparently this behavior is designed deliberately. Question is, does it conform to the XHR spec? 500064 2 ap 2011-11-10 11:18:09 -0800 Per bug 17481, all browsers used to not dispatch the event in this case. Sounds like this could be a mistake in the spec that Firefox picked up. 500475 3 deqing.huang 2011-11-10 19:05:33 -0800 Ok, that sounds good to me. I will see if the test case should be updated. 500498 4 jchaffraix 2011-11-10 21:11:17 -0800 It looks like the behavior of FF (we need to see the other browsers) has changed since the code was written. We did not get the spec updated at the time so more investigation needs to go in before closing this bug. 830120 5 ap 2013-02-11 14:19:32 -0800 *** This bug has been marked as a duplicate of bug 46012 ***