I am having a application where frontend being built using HTML, CSS and Javascript code. Backend will be created using core java, Restlet.
Now the real problem is frontend and backend both will be on diff servers with diff ports too. like, frontend is on: http://clientLookup
(just for example)
And backend is on, http://lcgrke:8080
Now as i will send the server or rest calls from frontend via Ajax Request or jQuery Ajax then i am getting the cross side scripting issue (SOP - same origin policy). I am not getting how to get around this.
JSONP can be one of the option, but it will work for only GET type calls only, but in my application i will have GET/POST requests. Also, some urls of server wont be JSONP enabled (dont ask me why, just accept they will be non-editable), so JSONP doesnt seem to be better option.
Can anyone please explain me how i will get around this issue?
JSONP is vulnerable to the data source replacing the innocuous function call with malicious code, which is why it has been superseded by cross-origin resource sharing (available since 2009) in modern applications.
JSONRequest. JSONP is still useful for older browser support, but given the security implications, unless you have no choice CORS is the better choice.
JSONP stands for JSON with Padding. Requesting a file from another domain can cause problems, due to cross-domain policy. Requesting an external script from another domain does not have this problem. JSONP uses this advantage, and request files using the script tag instead of the XMLHttpRequest object.
What is JSONP? The XMLHttpRequest(XHR) can be used to get the data from the server. Once the data is received in the browser it can use the JSON. parse() method to convert the received JSON string into JavaScript object.
I had the same issue not too long ago. You can install PHP on your frontend server and make the AJAX call to a PHP script on that server. There are several HTTP libraries for PHP (cURL being the most popular) that you can then use to make an HTTP request to your backend server. Basically you can write a PHP script on your frontend server to act as a middle man.
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