How to override HTTP response code

[Hao Nguyen]

Hi,

I have a dev tool Chrome extension (ModResponse) that allows developers to override their HTTP response. Using the debugger API + Fetch domain, I am able to override the HTTP response body. However, it looks the Fetch API is no longer able to modify the responseCode and responseHeaders (Bug: https://bugs.chromium.org/p/chromium/issues/detail?id=1275920, but it seems to be neglected). Are there alternative APIs that we can use to modify the responseCode?

Thanks,

Hao

[wOxxOm]

Try using the old method: Network.setRequestInterception + Network.continueInterceptedRequest

[Hao Nguyen]

Tried the Network methods. They do not override status code or response headers either.

Note that the same codes work with both Fetch and Network methods when running on Edge v103. They do not work in Chrome v104 or Brave v104 (it used to work in Brave but not any more).

[Simeon Vincent]

Hm, that does seem quite odd. I'll see if I can find someone on DevTools to take a look at it.

Simeon - @dotproto

Chrome Extensions DevRel

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[Hao Nguyen]

I just tried this on Chromium v106 and the APIs are working correctly as expected. It appears that the bug might be somewhere in Chrome and not in Chromium.

[Simeon Vincent]

There's very little difference between Chrome and Chromium. If it works in Chromium 106, it should also work in Chrome Canary (currently on Version 106.0.5229.0). Hao, could you retest in Canary and follow up here with your observations?

Simeon - @dotproto

Chrome Extensions DevRel

[Hao Nguyen]

Just did, and posted my observations at https://bugs.chromium.org/p/chromium/issues/detail?id=1275920