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POJquery ajax json get call delivered by Flask web framework - call fails
 

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    <p>I am trying to have a simple jquery ajax call fetching json data. However, the call fails and I cannot understand very well why.</p> <p>The code is below. To me it seems all right.</p> <pre><code>$(document).ready(function() { function onDataReceived (data){ alert('test'); }; $("button").click(function(){ $.ajax({ url: "/test", type: "GET", dataType: "jsonp", success: onDataReceived }); }); }); </code></pre> <p>EDIT Flask use</p> <p>The problem here was that I was using Flask and returning a json object. However, returning a pure json creates a cross domain conflict once you try to do the ajax call with jquery. Thus, much easier if you output jsonp from the flask view. To do that, you can use the snippet below (from here: <a href="http://flask.pocoo.org/snippets/79/" rel="nofollow">http://flask.pocoo.org/snippets/79/</a>). For the javascript piece you can refer to the one above, I only changed dataType from json to jsonp.</p> <pre><code>import json from functools import wraps from flask import redirect, request, current_app def support_jsonp(f): """Wraps JSONified output for JSONP""" @wraps(f) def decorated_function(*args, **kwargs): callback = request.args.get('callback', False) if callback: content = str(callback) + '(' + str(f().data) + ')' return current_app.response_class(content, mimetype='application/json') else: return f(*args, **kwargs) return decorated_function # then in your view @default.route('/test', methods=['GET']) @support_jsonp def test(): return jsonify({"foo":"bar"}) </code></pre> <p>I am not sure if there is a way to use straight json from flask, there probably is. However, as jsonp is also safer, I think better going with this anyway.</p>
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    1. CO[Same Origin Policy](http://en.wikipedia.org/wiki/Same_origin_policy)?
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    2. COThis is a cross domain issue. Need to use CORS or JSONP for cross domain url's.
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      1. USSushanth --
 

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