I'm working with two applications hosted on different servers, each with their own client-side and server-side components in native JavaScript. Unfortunately, CORS is disabled for both domains, and I need some guidance on how to enable data exchange strictly from the client side. The security team for Application A won't let us modify their server, and we don't have access to change any base server configurations. Any ideas on how to handle this?
3 Answers
One option you might consider is using the Window.postMessage method. It's designed to facilitate communication between different windows or iframes, but it mainly works for passing data between front-end components. Just keep in mind that you'll likely need some proper handling for this to be effective.
If the backend supports JSONP, that's another possibility. It’s a workaround that involves making a request via a script tag instead of XHR, but it totally depends on how the API is designed. Otherwise, your options are pretty limited without modifying CORS settings.
Yeah, JSONP can be a lifesaver if it's set up right. However, it feels like we're hitting a wall with those restrictions.
Another method you could explore is using an iframe. Although it’s a bit old-school and can be hacky, it lets you pass messages across different origins. Just be cautious since it’s not a clean solution. CORS exists to solve issues like this for a reason!
Right? I think a lot of these hacky methods just complicate things instead of providing a real solution. We should really be focusing on getting those CORS headers implemented.
I see where you're coming from, but postMessage is more for front-end communication rather than when you're trying to directly connect app A to app B's backend.