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Handle nonmappable code points in Document::encoding_parse_a_url (#37541)

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This is a followup to https://github.com/servo/servo/pull/33825. Using
`Encoder::encode` introduced a subtle bug: That function will silently
replace nonmappable code points (such as `㐀` in euc-jp). The url spec
however expects nonmappable characters to be treated differently. There
is actually an open bug in the `rust-url` repo about this:
https://github.com/servo/rust-url/issues/649, with the conclusion
apparently being that this should not be implemented by the url crate
itself.

Gecko implementation of the equivalent algorithm for reference:
https://searchfox.org/mozilla-central/rev/d52edf7ea4236446e118a2edc815023c5479663f/netwerk/base/nsStandardURL.cpp#116-172.

Testing: More web platform tests pass

Part of https://github.com/servo/servo/issues/5601

---------

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>
This commit is contained in:
Simon Wülker 2025-06-19 12:14:45 +02:00 • committed by GitHub
parent 3a54ddd034
commit a27c9ee691
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14 changed files with 65 additions and 294148 deletions
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9
tests/wpt/meta/url/percent-encoding.window.js.ini vendored
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@ -1,12 +1,3 @@
[percent-encoding.window.html]
[Input \x0eA with encoding iso-2022-jp]
expected: FAIL
[Input  with encoding gb18030]
expected: FAIL
[Input † with encoding big5]
expected: FAIL
[Input U+d800 with encoding windows-1252]
expected: FAIL