Fix #73630: Built-in Weberver - overwrite $_SERVER['request_uri'] #7207
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The built-in Webserver's `on_path`, `on_query_string` and `on_url` callbacks may be called multiple times from the parser; we must not simply replace the old values, but need to concatenate the new values instead. This appears to be tricky for `on_path` due to the path normalization, so we fail if the function is called again.
nikic
reviewed
Jun 29, 2021
Codecov Report
@@ Coverage Diff @@
## PHP-7.4 #7207 +/- ##
===========================================
+ Coverage 72.99% 73.02% +0.02%
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Files 803 803
Lines 283801 283937 +136
===========================================
+ Hits 207155 207338 +183
+ Misses 76646 76599 -47
Continue to review full report at Codecov.
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The total length of the HTTP headers is already restricted to at most `PHP_HTTP_MAX_HEADER_SIZE` bytes, so no integer overflow can occur in our calculations.
nikic
approved these changes
Jun 30, 2021
nikic
reviewed
Jun 30, 2021
The built-in Webserver logs errors during request parsing to stderr, but this is ignored by the php_cli_server framework, and apparently the Webserver does not send a resonse at all in such cases (instead of an 4xx). Thus we can only check that a request with an overly long path fails.
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The built-in Webserver's
on_path,on_query_stringandon_urlcallbacks may be called multiple times from the parser; we must not
simply replace the old values, but need to concatenate the new values
instead.
This appears to be tricky for
on_pathdue to the path normalization,so we fail if the function is called again.