When you use $.getJSON on an external domain it automatically actions a JSONP request, for example my tweet slider here If you look at the source code you can see that I am calling the Twitter API using .getJSON. So your example would be: THIS IS TESTED AND WORKS (You can go to http://smallcoders.com/javascriptdevenvironment.html to … Read more
function foo(data) { // do stuff with JSON } var script = document.createElement(‘script’); script.src=”https://example.com/path/to/jsonp?callback=foo” document.getElementsByTagName(‘head’)[0].appendChild(script); // or document.head.appendChild(script) in modern browsers
You can’t POST using JSONP…it simply doesn’t work that way, it creates a <script> element to fetch data…which has to be a GET request. There’s not much you can do besides posting to your own domain as a proxy which posts to the other…but user’s not going to be able to do this directly and … Read more
I solved the Access-Control-Allow-Origin error modifying the dataType parameter to dataType:’jsonp’ and adding a crossDomain:true $.ajax({ url: ‘https://www.googleapis.com/moderator/v1/series?key=’+key, data: myData, type: ‘GET’, crossDomain: true, dataType: ‘jsonp’, success: function() { alert(“Success”); }, error: function() { alert(‘Failed!’); }, beforeSend: setHeader });
It is not possible to do an asynchronous POST to a service on another domain, due to the (quite sensible) limitation of the same origin policy. JSON-P only works because you’re allowed to insert <script> tags into the DOM, and they can point anywhere. You can, of course, make a page on another domain the … Read more
Here is working example: <html><head><title>Twitter 2.0</title> <script type=”text/javascript” src=”http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js”></script> </head><body> <div id=’tweet-list’></div> <script type=”text/javascript”> $(document).ready(function() { var url = “http://api.twitter.com/1/statuses/user_timeline/codinghorror.json”; $.getJSON(url + “?callback=?”, null, function(tweets) { for(i in tweets) { tweet = tweets[i]; $(“#tweet-list”).append(tweet.text + “<hr />”); } }); }); </script> </body></html> Notice the ?callback=? at the end of the requested URL. That indicates to … Read more
The only (easy) way to get cross-domain data using AJAX is to use a server side language as the proxy as Andy E noted. Here’s a small sample how to implement that using jQuery: The jQuery part: $.ajax({ url: ‘proxy.php’, type: ‘POST’, data: { address: ‘http://www.google.com’ }, success: function(response) { // response now contains full … Read more
JSONP is JSON with padding. That is, you put a string at the beginning and a pair of parentheses around it. For example: //JSON {“name”:”stackoverflow”,”id”:5} //JSONP func({“name”:”stackoverflow”,”id”:5}); The result is that you can load the JSON as a script file. If you previously set up a function called func, then that function will be called … Read more
Preface: This answer is over six years old. While the concepts and application of JSONP haven’t changed (i.e. the details of the answer are still valid), you should look to use CORS where possible (i.e. your server or API supports it, and the browser support is adequate), as JSONP has inherent security risks. JSONP (JSON … Read more
JSONP is really a simply trick to overcome XMLHttpRequest same domain policy. (As you know one cannot send AJAX (XMLHttpRequest) request to a different domain.) So – instead of using XMLHttpRequest we have to use script HTMLl tags, the ones you usually use to load JS files, in order for JS to get data from … Read more