[xhr] abort() handling of state is busted (#54)

Consider this testcase:

    var xhr = new XMLHttpRequest();
    xhr.open("GET", "data:text/plain,");
    console.log(xhr.readyState);
    xhr.send();
    xhr.onreadystatechange = function() {
      xhr.onreadystatechange = null;
      xhr.open("GET", "data:text/plain,hello");
      xhr.onload = function() { alert(xhr.responseText); }
      xhr.send();
    }
    xhr.abort();
    console.log(xhr.readyState);

per the letter of the current spec, this should log 1 then 0.  And it should alert "hello".  This is the behavior I see in Blink and WebKit.  However, this means that after the abort() call the readyState is 0 but there is a load in progress.  That's the busted part.

Gecko has a guard in abort() step 3 and only reset the state to "unsent" if it's still "done" after the request error steps and all their events have terminated.  This leaves state as a correct reflection of the actual state of the object.

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Reply to this email directly or view it on GitHub:
https://github.com/whatwg/xhr/issues/54