Unable to communicate with MediaWiki API using jQuery

Question

Unable to communicate with MediaWiki API using jQuery

My attempt to retrieve content from Wikipedia in JSON format has been unsuccessful:

$.getJSON("http://en.wikipedia.org/w/api.php?action=query&prop=revisions&rvprop=content&titles="+title+"&format=json", function(data) {
    doSomethingWith(data);
});

Despite trying the above code, I received no response. Interestingly, when I try pasting a similar URL directly into the browser's address bar like this

http://en.wikipedia.org/w/api.php?action=query&prop=revisions&rvprop=content&titles=jQuery&format=json

I am able to retrieve the expected content. What could be causing this issue?

jquery json cross-domain response wikipedia-api

Answer 1

Answer №1

To enable JSONP functionality, make sure to include $.getJSON() and append &callback=? to the querystring, as shown below:

$.getJSON("http://en.wikipedia.org/w/api.php?action=query&prop=revisions&rvprop=content&titles="+title+"&format=json&callback=?", function(data) {
    handleData(data);
});

Try it out here.

If you don't use JSONP, the XmlHttpRequest will be blocked due to the same-origin policy, preventing data retrieval.

Answer 2

To enable JSONP functionality, make sure to include $.getJSON() and append &callback=? to the querystring, as shown below:

$.getJSON("http://en.wikipedia.org/w/api.php?action=query&prop=revisions&rvprop=content&titles="+title+"&format=json&callback=?", function(data) {
    handleData(data);
});

Try it out here.

If you don't use JSONP, the XmlHttpRequest will be blocked due to the same-origin policy, preventing data retrieval.

Answer 3

Answer №2

It has been noted by previous responses that your request is crossing domains.

The suggested solution, as mentioned by both responders, is to utilize JSONP instead of JSON. Another option is to consider using CORS (Cross-origin resource sharing) as an alternative method for cross-domain requests.

Although CORS is supported by MediaWiki, it is not yet activated on Wikipedia due to compatibility issues with Wikipedia's caching system.

Efforts are underway to address this through a bug report aimed at enabling $wgCrossSiteAJAXdomains for Wikimedia sites: Implementing $wgCrossSiteAJAXdomains for Wikimedia platforms.

Upon successful resolution of this issue, you will be able to perform cross-domain AJAX requests on Wikipedia without relying on JSONP in browsers that support CORS. Modern versions of major browsers now include CORS support, although Internet Explorer version 10, which has limited usage, is required. Version 9 offers an alternate solution known as xdomainrequest, but it did not gain widespread adoption.

Answer 4

It has been noted by previous responses that your request is crossing domains.

The suggested solution, as mentioned by both responders, is to utilize JSONP instead of JSON. Another option is to consider using CORS (Cross-origin resource sharing) as an alternative method for cross-domain requests.

Although CORS is supported by MediaWiki, it is not yet activated on Wikipedia due to compatibility issues with Wikipedia's caching system.

Efforts are underway to address this through a bug report aimed at enabling $wgCrossSiteAJAXdomains for Wikimedia sites: Implementing $wgCrossSiteAJAXdomains for Wikimedia platforms.

Upon successful resolution of this issue, you will be able to perform cross-domain AJAX requests on Wikipedia without relying on JSONP in browsers that support CORS. Modern versions of major browsers now include CORS support, although Internet Explorer version 10, which has limited usage, is required. Version 9 offers an alternate solution known as xdomainrequest, but it did not gain widespread adoption.

Answer 5

Answer №3

If you are retrieving data from a different domain, remember to utilize getJSONP as it is consistent with the "same origin policy".

UPDATE

To implement &callback=?, follow Nick's advice to trigger getJSONP.

Answer 6

If you are retrieving data from a different domain, remember to utilize getJSONP as it is consistent with the "same origin policy".

UPDATE

To implement &callback=?, follow Nick's advice to trigger getJSONP.

Answer 7

Answer №4

If you want to make a CORS request without using JSONP, one way is to add the parameter origin=* directly in the request URL. Here's an example:

var searchQuery = "JavaScript";

$.getJSON("https://en.wikipedia.org/w/api.php?action=query&list=search&srsearch="+searchQuery+"&format=json&origin=*", function(response) {
    console.log(response.query.search);
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>

Answer 8

If you want to make a CORS request without using JSONP, one way is to add the parameter origin=* directly in the request URL. Here's an example:

var searchQuery = "JavaScript";

$.getJSON("https://en.wikipedia.org/w/api.php?action=query&list=search&srsearch="+searchQuery+"&format=json&origin=*", function(response) {
    console.log(response.query.search);
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>

Unable to communicate with MediaWiki API using jQuery

Answer №1

Answer №2

Answer №3

Answer №4

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