Question

I am trying to return a json response for an ajax request with django. Json response is a python dictionary serialized. I am sure that dictionary contains enough data, but it doesn’t arrive to client side.
Server side I have this python routine:

def routine(request):
    response_dict = {}
    f = open("output.txt", "r")
    for line in f:
        line.strip('\n ')
        (key, val) = line.split('\t')
        if re.search("^[a-zA-Z][a-zA-Z0-9]*$", key) != None:
            if re.search("^[0-9]+$", val) != None:
                response_dict[key] = val
    f.close()
    json_response = json.dumps(response_dict)
    return HttpResponse(json_response, mimetype='application/json')

Client side I have this javascript+jQuery routine (EDITED below, see that version):

$.postJSON('ajax/routine', '', function(data) 
      {
        console.debug(data);
        console.debug(data.result);
        $("#result").html(data.result);
      });

postJSON is a jQuery plugin that does a POST ajax request, the code is the following:

$.postJSON = function(url, data, callback) {
    return jQuery.ajax({
    'type': 'POST',
    'url': url,
    'contentType': 'application/json',
    'data': JSON.stringify(data),
    'dataType': 'json',
    'success': callback
    });
};

No output is written neither in console nor in tag identified with “result”.

Edit now it is returning 200 Http status code, and 124 as data.result . In the server I debugged and json.dumps works flawlessly.

Edit2 I’ve edited my jQuery/javascript code:

$.postJSON('ajax/routine', '', function(data) 
      {
        array = {};
        for(key in data)
          {
            array = key + " " + data[key];
          }
        $("#result").html(array);
      });

I’ve tested it under Firebug and response arrives to client but: 1) with small array (1 element) it is printed out 2) response makes me crash both Chromium developer tools and Firebug (when opening JSON tab, in response tab I get only a piece of response and the message “Firebug response size limit has been reached. Click here to open the entire response in a new Firefox tab”.

Thanks

Answer 1

$.postJSON is about POSTing data, which is not what you need here since you’re obviously not posting anything (and don’t handle anythin posted in your view neither). Using $.getJSON instead is probably the first thing to do (http://api.jquery.com/jQuery.getJSON/). This would also avoid any problem with django’s csrf token