declarative_net_request - request header logging

[Ilgaz KILIÇGEDİK]

Hi folks,

I am looking a way to get a specific header's value (let's say the header name is "token") from a web page. I'll use this value in my extension to make my extension's requests valid.

When the web page is loading, it makes a xmlHttpRequests and I can get this header value by devtool.js. But user must open devtools window and refresh the page to make this happen. So it s*cks.

As I searched from google, formerly it was possible to do that by "chrome.webrequest.onbeforerequest" but as I am using manifest v3, my chrome browser doesn't recognize webrequest object. 

Is there any way to accomplish this by declarative_net_request? Or by any other way...

Thanks a million!

[wOxxOm]

The correct solution is chrome.webRequest.onHeadersReceived.

It should be used in an extension script such as the background script, not a content script.

It also requires adding "webRequest" to permissions and the site's URL to host_permissions in manifest.json.

[wOxxOm]

If you want to see the outgoing headers, use onSendHeaders event.