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Expose a filtered content-encoding value to resource timing #411

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Expose a filtered content-encoding value to resource timing #411

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9cc68e0
Add contentEncoding to resource timing interface.
guohuideng2024 Dec 12, 2024
3045795
contentEncoding must be filtered before being reported.
guohuideng2024 Dec 13, 2024
0f148bf
improve text.
guohuideng2024 Dec 16, 2024
6437898
Add updated details on how contentEncoding should be filtered.
Jan 30, 2025
4a4510d
Fix and improve contentEncoding steps.
Feb 13, 2025
693b19e
Move the "note" to informative note.
Feb 13, 2025
6b50e38
if codings[0] is empty string
Feb 14, 2025
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45 changes: 43 additions & 2 deletions index.html
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Original file line number Diff line number Diff line change
Expand Up @@ -376,6 +376,7 @@ <h3>
readonly attribute unsigned short responseStatus;
readonly attribute RenderBlockingStatusType renderBlockingStatus;
readonly attribute DOMString contentType;
readonly attribute DOMString contentEncoding;
[Default] object toJSON();
};
</pre>
Expand Down Expand Up @@ -667,8 +668,7 @@ <h3>
info</a>'s [=response body info/decoded size=].
</p>
<p data-dfn-for="PerformanceResourceTiming">
The <dfn>transferSize</dfn> getter steps are to perform the following
steps:
The <dfn>transferSize</dfn> getter steps are the following:
</p>
<ol>
<li>
Expand Down Expand Up @@ -715,6 +715,47 @@ <h3>
<a data-for="PerformanceResourceTiming">resource info</a>'s
[=response body info/content type=].
</p>
<p data-dfn-for="PerformanceResourceTiming">
The <dfn>contentEncoding</dfn> getter steps are the following:
</p>
<ol>
<li>
<p>
Let <i>codings</i> be <a>this</a>'s <a data-for=
"PerformanceResourceTiming">response body info</a>'s [=response
body info/content encoding=].
</p>
</li>
<li>
<p>
If <i>codings</i> is null, return the empty string.
</p>
</li>
<li>
<p>
If <i>codings</i> contains two strings or more, return
"<code>multiple</code>".
</p>
</li>
<li>
<p>
If <i>codings[0]</i> is the empty string, or it is supported by the user agent,
and is listed in the
<a href="https://www.iana.org/assignments/http-parameters/http-parameters.xhtml#content-coding">
content encoding registry on IANA</a>, return <i>codings[0]</i>.
</p>
<p class='note'>
"<code>identity</code>" is never supported as a coding. See details
<a href="https://www.rfc-editor.org/rfc/rfc9110.html#name-content-encoding">
here</a>.
</p>
</li>
<li>
<p>
Otherwise, return "<code>unknown</code>".
</p>
</li>
</ol>
<p data-dfn-for="PerformanceResourceTiming">
The <dfn>renderBlockingStatus</dfn> getter steps are to return
<a data-link-for="RenderBlockingStatusType">blocking</a> if
Expand Down
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