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[Cache] fix possible collision when writing tmp file in filesystem adapter

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This commit is contained in:
Nicolas Grekas 2021-01-11 19:27:14 +01:00
parent c79e61f1f2
commit 340d15e400
1 changed files with 13 additions and 2 deletions
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15
src/Symfony/Component/Cache/Traits/FilesystemCommonTrait.php
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@ -93,9 +93,20 @@ trait FilesystemCommonTrait
set_error_handler(__CLASS__.'::throwError');
try {
if (null === $this->tmp) {
$this->tmp = $this->directory.uniqid('', true);
$this->tmp = $this->directory.bin2hex(random_bytes(6));
}
file_put_contents($this->tmp, $data);
try {
$h = fopen($this->tmp, 'x');
} catch (\ErrorException $e) {
if (false === strpos($e->getMessage(), 'File exists')) {
throw $e;
}
$this->tmp = $this->directory.bin2hex(random_bytes(6));
$h = fopen($this->tmp, 'x');
}
fwrite($h, $data);
fclose($h);
if (null !== $expiresAt) {
touch($this->tmp, $expiresAt);