Refine UriUtils#decode and StringUtils#uriDecode implementation and documentation
#34673
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@kilink Could you please add a Signed-off-by trailer to your commit message as described in https://spring.io/blog/2025/01/06/hello-dco-goodbye-cla-simplifying-contributions-to-spring?
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Optimize the StringUtils.uriDecode method in the following ways: - Use a StringBuilder instead of ByteArrayOutputStream, and only decode %-encoded sequences. - Use HexFormat.fromHexDigits to decode hex sequences. - Decode to a byte array that is only allocated if encoded sequences are encountered. Signed-off-by: Patrick Strawderman <pstrawderman@netflix.com>
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Done. |
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UriUtils#decode and StringUtils#uriDecode implementation and documentation
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Refine the StringUtils#uriDecode method in the following ways: - Use a StringBuilder instead of ByteArrayOutputStream, and only decode %-encoded sequences. - Use HexFormat.fromHexDigits to decode hex sequences. - Decode to a byte array that is only allocated if encoded sequences are encountered. Signed-off-by: Patrick Strawderman <pstrawderman@netflix.com> See spring-projectsgh-34673
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Merged with some additional optimizations + a Javadoc update, thanks a lot @kilink. |
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Optimize the StringUtils.uriDecode method in the following ways:
Using a StringBuilder and decoding to a temporary byte buffer are inspired by how JDK's URLDecoder works; HexFormat was added in JDK17 and should be more performant than Integer.parseInt as it uses lookup tables.
I initially looked at this as an easy optimization opportunity, but it appears this also resolves the issue raised in #34570; I've added a test case to exercise the problem described in that issue.