Add support for various deflate compression levels #309
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library/Requests.php
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| if (substr($data, 0, 2) !== "\x1f\x8b" && substr($data, 0, 2) !== "\x78\x9c") { | ||
| // All valid deflate, gzip header magic markers | ||
| $valid_magic = array("\x1f\x8b", "\x78\x01", "\x78\x5e", "\x78\x9c", "\x78\xda"); | ||
| if (!in_array(substr($data, 0, 2), $valid_magic)) { |
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This needs to use the $strict parameter to in_array, but otherwise looks good.
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Fixed in follow up commit. Tests included.
Codecov Report
@@ Coverage Diff @@
## master #309 +/- ##
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+ Coverage 92.11% 92.11% +<.01%
+ Complexity 760 759 -1
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Files 21 21
Lines 1762 1763 +1
============================================
+ Hits 1623 1624 +1
Misses 139 139
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Added strict |
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@schlessera I've just been looking at this PR. This seems like a good change. What do you think ? To get this ready to merge, IMO, the following actions are needed:
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Different compression levels yield a specific second byte in the magic header for the deflate encoding. All of them can be decoded by the same functions without any issues. Let them through, as they've been seen in the wild. Fixes WordPress#301
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I've made the changes as per the above comment. This PR is now ready for review/merge. |
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Strict check magic zlib magic markers. Add zlib compression level tests. ~~Enable encoding tests, these were not included in the test suite.~~
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... and document the source and what the marker is indicating. Includes switching to using `isset()` instead of `in_array()` for a tiny performance boost.
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| @@ -187,7 +187,7 @@ class Requests { | |||
| /** | |||
| * All (known) valid deflate, gzip header magic markers. | |||
| * | |||
| * These markers related to different compression levels. | |||
| * These markers relate to different compression levels. | |||
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Thanks for the PR, @soulseekah ! |
Different compression levels yield a specific second byte in the magic
header for the deflate encoding. All of them can be decoded by the same
functions without any issues. Let them through, as they've been seen in
the wild.
Fixes #301