On 2010-10-22, at 11:53 , Viet Nguyen wrote:
> Hi there, I am quite new to Django and encounters a problem which
> takes me a lot of time to figure out. As I known, Django provides some
> functionality to prevent cross domain AJAX requests.
Last time I checked, Django didn't integrate any ajaxy facilities and let
developers do whatever they wanted on that front. In fact, Django would be
quite unable to manage cross-domain xhr requests considering that's a feature
of JS clients aka your web browser.
> However, using
> jQuery you can specify a callback (JSONP) and could talk and get data
> back from the server. For example:
>
> $.getJSON('http://127.0.0.1:8000/biotool/prepDownload/login/?user=' +
> uName + '&password=' + pWord + '&callback=?',
> function (data) {
> if (data != null) {
> Load.displayPackages(data);
> window.location = "#_sepa";
> }
> else {//request failed
> var element =
> document.getElementById("loginError");
> element.innerHTML = "Could not authenticate
> with server";
> }
> });
Please note that you're not doing what you're talking about at all here. jQuery
provides built-in facilities for jsonp namely the 'jsonp' dataType which can be
provided as an option to most jQuery ajax calls. But the code above doesn't use
jsonp, as far as I can tell it uses regular json.
> However, for some cases, when you need to send a large amount of data
> to the server (in JSON format), you may have to use $.post(). This is
> a sample section of code:
>
> $.ajax( {
> 'url': 'http://127.0.0.1:8000/biotool/
> prepDownload/test/',
> 'type': 'POST',
> 'data': {'rowID': '2', 'taxon': 'aaa'},
> 'success': function (s) {
> alert (s);
> } });
Again, you're not using jQuery's jsonp facilities here. But in any case, jsonp
the way it is generally implemented (via <script> tags) usually can't be used
via POST. In that case, you generally want to build yourself some kind of proxy
server which will be able to forward your queries to the remote service.
>
> My views.py:
>
> def test(request):
> print request.POST
> print request.GET
> return HttpResponse('test')
In any case, jsonp requires cooperation between the server and the client. And
again, django has none built in that I know of, so you're not doing jsonp
anywhere.
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