Update forbidden request headers in glossary #41830
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@@ -28,16 +28,17 @@ Forbidden headers are one of the following: | |
| - {{HTTPHeader("Connection")}} | ||
| - {{HTTPHeader("Content-Length")}} | ||
| - {{HTTPHeader("Cookie")}} | ||
| - `Cookie2` | ||
| - {{HTTPHeader("Date")}} | ||
| - {{HTTPHeader("DNT")}} | ||
| - {{HTTPHeader("Expect")}} | ||
| - {{HTTPHeader("Host")}} | ||
| - {{HTTPHeader("Keep-Alive")}} | ||
| - {{HTTPHeader("Origin")}} | ||
| - `Proxy-` headers | ||
| - `Sec-` headers | ||
| - {{HTTPHeader("Referer")}} | ||
| - {{HTTPHeader("Set-Cookie")}} | ||
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| - {{HTTPHeader("TE")}} | ||
| - {{HTTPHeader("Trailer")}} | ||
| - {{HTTPHeader("Transfer-Encoding")}} | ||
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@@ -53,6 +54,9 @@ Forbidden headers are one of the following: | |
| > [!NOTE] | ||
| > While the {{HTTPHeader("Referer")}} header is listed as a forbidden header [in the spec](https://fetch.spec.whatwg.org/#forbidden-request-header), the user agent does not retain full control over it and the header can be programmatically modified. For example, when using [`fetch()`](/en-US/docs/Web/API/Window/fetch), the {{HTTPHeader("Referer")}} header can be programmatically modified via the [`referrer` option](/en-US/docs/Web/API/RequestInit#referrer). | ||
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| > [!NOTE] | ||
| > Chrome also forbids `Access-Control-Request-Private-Network` | ||
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There was a problem hiding this comment. FWIW We should document this header and add it to BCD mdn/browser-compat-data#25467. Because we have not done so I think this is good (because there is no way for anyone to work out the support story on this) but when BCD/docs exist this would just be in the main list. |
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| ## See also | ||
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| - Related glossary terms: | ||
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What browser is this implemented in? MDN doesn't document things that have no implementation.
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All 3 of them. I linked the Chrome source code and I also ran the snippet I posted above that sends the 4 mentioned headers on macOS:
Chrome
Safari
Firefox
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Thanks
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FYI, some context on removal:
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Thanks for that clarification @bsmth - I should have searched the history.
I have reverted this in #41964 because Cookie2 is not part of the web platform. I suspect this will come up again until the spec gets updated to remove the mention of this header.