How to continue execution after Uncaught DOMException?

Question

I'm performing a long-running task, and somewhere in the middle, it's possible that this exception can be thrown:

Uncaught DOMException: Blocked a frame with origin "http://localhost:8000" from accessing a cross-origin frame.

The problem is, once this exception is thrown, my long-running, unrelated task is broken up and does not complete successfully. Something about this DOMException messes everything up.

I've tried using window.onerror as suggested here, but all this does is allow me to inspect the error, not prevent it from breaking the application.

Note that I can't use regular try/catch blocks since this iframe is being loaded in HTML.

Any ideas?

See update. Can't use regular try/catch blocks since this iframe is being loaded in HTML. — Snowman, Oct 20 '17 at 17:09
Can you explain more about your "unrelated task". As far as I know, this security exception shouldn't affect any of your other code. — Usama Ejaz, Oct 20 '17 at 17:21
Well, let's say I'm importing an array of 10,000 URLs, and somewhere in the middle, if I encounter a specific URL (let's say at index 2,000), I'll load that into the iframe (via JS/Angular). If that exception occurs, the remaining 8,000 URLs are not imported, because the import task is broken up. — Snowman, Oct 20 '17 at 17:25
@Snowman Instead of adding a try and catch on the embedder of the iframe, modify the iframe code itself and add a try and catch. — RainingChain, Oct 20 '17 at 17:53
The iframe code itself is not loaded since it violates the same-origin policy. — Snowman, Oct 20 '17 at 18:14

score 0 · Answer 1 · answered Oct 20 '17 at 17:08

0

Are you catching the exception and handling it gracefully by surrounding it in a try-catch statement?

https://developer.mozilla.org/cs/docs/Web/JavaScript/Reference/Statements/try...catch

answered Oct 20 '17 at 17:08

Spencer MacBeth

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Can't use regular try/catch blocks since this iframe is being loaded in HTML. – Snowman Oct 20 '17 at 17:09

How to continue execution after Uncaught DOMException?

1 Answers1