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I know about AJAX cross-domain policy. So I can't just call "http://www.google.com" over a ajax HTTP request and display the results somewhere on my site.
I tried it with dataType "jsonp", that actually would work, but I get a syntax error (obviously because the received data is not JSON formated)
Is there any other possiblity to receive/display data from a foreign domain? iFrames follow the same policy?
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CORS is a mechanism that defines a procedure in which the browser and the web server interact to determine whether to allow a web page to access a resource from different origin. Figure 2. Cross domain ajax request. When you do a cross-origin request, the browser sends Origin header with the current domain value.
For a successful cross-domain communication, we need to use dataType “jsonp” in jquery ajax call. JSONP or “JSON with padding” is a complement to the base JSON data format which provides a method to request data from a server in a different domain, something prohibited by typical web browsers.
Because of Same origin policy. The same-origin policy exists to prevent malicious use of resources. If there were no rules governing cross-domain script access, it would be trivial to wreak all manner of havoc on unsuspecting users.
Two Approaches for cross-domain AJAX requests, Using JSONP (JSON with Padding) Enabling CORS (Cross-Origin Resource Sharing)
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:
$.ajax({ url: 'proxy.php', type: 'POST', data: { address: 'http://www.google.com' }, success: function(response) { // response now contains full HTML of google.com } }); And the PHP (proxy.php):
echo file_get_contents($_POST['address']); Simple as that. Just be aware of what you can or cannot do with the scraped data.
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