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Asked: 2026-05-28T07:14:40+00:00

I have this Chrome extension that modifies the header of requests before sending them.

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I have this Chrome extension that modifies the header of requests before sending them. I now would like to be able, within the same extension, to check the header of the response. I searched throughout the Chrome Extension APIs but I couldn’t find anything of interest.

This is the code I use for modifying the header of the request, maybe it’s useful for you to know how I do it.

chrome.webRequest.onBeforeSendHeaders.addListener(
      function(details) {/*do something*/},
      {urls: ["<all_urls>"]},
      ["blocking", "requestHeaders"]);

Does anyone knows how to do that, or can point me to an interesting source? Thanks

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  1. Editorial Team

    See the live-headers example.

    http://code.google.com/chrome/extensions/examples/api/debugger/live-headers.zip

    EDIT: For posterity you can find a version of live-headers.zip on their archived bug/patch site https://chromiumcodereview.appspot.com/9289057

    With the latest revision (2021) no longer including the zip, but here’s the dir https://src.chromium.org/viewvc/chrome/trunk/src/chrome/common/extensions/docs/examples/api/debugger/live-headers/?pathrev=226223

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