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    <p>Does the server response contain JSON with padding?</p> <p>You see, there are two ways to receive data from different domain:</p> <ol> <li><p><a href="http://en.wikipedia.org/wiki/Cross-origin_resource_sharing" rel="nofollow">CORS</a> is the new one but requires a separate <code>Access-Control-Allow-Origin</code> header to be sent from the server. Browser support is also somewhat limited for it.</p></li> <li><p><a href="http://en.wikipedia.org/wiki/JSONP" rel="nofollow">JSONP</a> doesn't rely on a server header but instead requires it to send back JSON data with so-called <em>'padding'</em>:</p> <pre><code>callback('{"your": ["json", "data"}') </code></pre> <p>Your JavaScript library (jQuery in this case) is then wraps it into a new <code>script</code> tag tricking your browser to evaluate it. Inside this <code>callback</code> function jQuery parses the JSON data and sends it to your <code>fnCallback</code>. After that it removes the unnecessary <code>script</code> tag from the page. In general it's a very fragile solution but it works in practice. For example, if the server doesn't pad JSON data you'll end up with the following code inside a <code>script</code> tag:</p> <pre><code>'{"your": ["json", "data"}' </code></pre> <p>Notice that it's just a string and does nothing. So, check if the server sends the wrapped JSON and not the raw JSON. I've run into the same problem quite a few times before and that helped me.</p></li> </ol> <hr> <p><strong>EDIT</strong>: Since you posted your server-side code I assume that you can modify it. I've never played with Django but I'll try to give you hints:</p> <ol> <li><p>Inside the <code>request</code> that you receive there should be a parameter called <code>callback</code> - that's what jQuery sends to you and what you should use for padding. Put it somewhere:</p> <pre><code># Like I said I don't know the exact API but you get the idea callback = request.GET["callback"] </code></pre></li> <li><p>After that <em>pad</em> your response before sending it to client:</p> <pre><code>response = HttpResponse( # Put callback name before the actual JSON callback + "(" + simplejson.dumps(response_dict) + ");", mimetype='application/javascript') </code></pre></li> </ol> <p>This should work.</p>
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    1. POWhy jQuery ajax jsonp request gives error?
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    1. USAndrew Андрей Листочкин
    1. USAndrew Андрей Листочкин
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    1. POWhy jQuery ajax jsonp request gives error?
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    1. COLast-Modified: Thu, 12 Jul 2012 07:30:54 GMT Expires: Thu, 12 Jul 2012 07:30:54 GMT Content-Type: application/javascript Cache-Control: max-age=0 {"sColumns": "id,name,description,image_path,sort_order,parent,", "iTotalRecords": 12, "aaData": ... is the response coming from server.
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      1. USBurak
    2. COAh, you see here: `... {"sColumns": ...` _no padding_ before the server response data :( If it's your server then you should modify the server-side code to support padding. If it's not yours, try CORS, or ask them to add JSONP support, or use some server-side querying solution. [See my answer about the later](http://stackoverflow.com/questions/10580765#10581382).
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      1. USAndrew Андрей Листочкин
 

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