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POXMLHttpRequest POST stuck at readyState 1 after several successive requests against IIS7+Windows 7 Pro
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copied!<p>I'm using JavaScript to send textarea updates back to a server in real-time. My HTML page uses a single XMLHttpRequest object to POST data to the server asynchronously. The messages are sent potentially at every onKeyUp event, but because I only use a single XMLHttpRequest object I throttle the requests by only POSTing when the readyState is either 0 (uninitialized) or 4 (loaded).</p> <p>Against IIS6 on Windows 2003 Server, everything is working fine. Against IIS7 on Windows 7 Professional, the readyState of my XMLHttpRequest object gets stuck at 1 (initialized) if I type in several characters quickly.</p> <p>The number of characters I can get in varies from 3 to 20 or so. If I reload the page, I can enter in a few more characters until I get stuck again. If I type slowly, then I can enter more characters before I see the problem. [Could this have anything to do with connection limits on IIS7?]</p> <p>Also, if I use GET instead of POST, everything works fine (except that GET won't support the length of data I need to send).</p> <p>Here's a snippet of the important bits of code here. Anyone have any insight into this problem? Thanks in advance.</p> <pre><code>var _xml = getXmlHttpRequest(); function getXmlHttpRequest() { if (window.XMLHttpRequest) return new XMLHttpRequest(); else if (window.ActiveXObject) return new ActiveXObject("Microsoft.XMLHTTP"); alert ("Upgrade your browser, Fool!"); return null; } function postValue(value) { // sends the answer to the server for saving if (_xml.readyState == 4 || _xml.readyState == "0") { var params = "value=" + encodeURIComponent(value); _xml.open("post", "save.py", true); _xml.onreadystatechange = handlePostValue; _xml.setRequestHeader("Content-Type", "application/x-www-form-urlencoded"); _xml.setRequestHeader("Content-Length", params.length); _xml.setRequestHeader("Connection", "close"); _xml.send(params); } } </code></pre>

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