Re: [whatwg/fetch] Return a `content-encoding` header for resource timing and more (PR #1796)

@guohuideng2024 commented on this pull request.



> @@ -6319,6 +6321,23 @@ optional boolean <var>forceNewConnection</var> (default false), run these steps:
          <li><p>Let <var>codings</var> be the result of <a>extracting header list values</a> given
          `<code>Content-Encoding</code>` and <var>response</var>'s <a for=response>header list</a>.
 
+         <li><p>Let <var>filteredCoding</var> be "<code>_</code>".

Yes. The CL is being reviewed right now:
https://chromium-review.googlesource.com/c/chromium/src/+/6506187

The following doc should be the one specifying the syntax restrictions on the values: https://www.rfc-editor.org/rfc/rfc8941.html and there is no restriction saying the value cannot start with "_". So, `_unkown` is better than `_` but I think it still requires reserving it with ietf.  Let me email Roy to get some clarification on this.

On the other hand I think "the empty string" is more conventional than `_missing` so I fee strongly for the `the empty string`.



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