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POXMLHttpRequest to the MongoDB simple rest interface
 

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  1. POXMLHttpRequest to the MongoDB simple rest interface
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    <p>I am a beginner in both Ajax and MongoDB. I was hoping to visualize some of the data in my MongoDB using a web browser (which, for the moment, is running on the same host). For this, I thought it might be possible to get the data using XMLHttpRequests. I am running MongoDB with the --rest option and I checked that when I load hxxp://localhost:28017/test_db/ss_test/ on Firefox, I get the proper reply (a JSON document with the data in the ss_test collection of the test_db database). So far, so good.</p> <p>I then wrote the following JavaScript function which I connected to the "onclick" of a button:</p> <pre><code>function makeRequest() { var myrequest = new XMLHttpRequest(); myrequest.onreadystatechange = function() { alert("status=" + myrequest.status + " readyState=" + myrequest.readyState) if (myrequest.status == 200 &amp;&amp; myrequest.readyState == 4) { // ...do something with the response } } myrequest.open("GET", "http://localhost:28017/test_db/ss_test/", true); myrequest.send(); } </code></pre> <p>So, when I load the html file on Firefox, open the console and click on my button, I see that the http request is indeed made, the status code is "HTTP/1.0 200 OK" and a response with Content-Length: 219257 is delivered, which looks great. However, the XMLHttpRequest object does not report the status=200. The alerts that pop up report a constant status of 0 as the readyState progressively becomes 1, 2 and 4 and my if statement is never true.</p> <p>Could anyone please tell me what I am doing wrong? In the beginning I thought it was because my html was loaded on the browser by the file protocol or that I was seeing some same-origin policy related issue, but then I put the html file on a web server on localhost and loaded it from there and nothing changed. Thank you very much for any replies!</p>
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    1. COThe http code 0 does not exist. Use a sniffer like **tamper data**, to see what http status code you are actually receiving.
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    2. COIt says 200 :-/
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