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fix "Network error" download a log via our Api\Json\Tail class eg. CalDAV/CardDAV log

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This commit is contained in:
ralf 2022-05-12 11:28:17 +02:00
parent be1e2e81c0
commit 3ac6cbba87
1 changed files with 9 additions and 8 deletions
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15
api/src/Json/Tail.php
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@ -21,14 +21,14 @@ use EGroupware\Api;
* To not allow to view arbitrary files, allowed filenames are stored in the session. * To not allow to view arbitrary files, allowed filenames are stored in the session.
* Class fetches log-file periodically in chunks for 8k. * Class fetches log-file periodically in chunks for 8k.
* If fetch returns no new content next request will be in 2s, otherwise in 200ms. * If fetch returns no new content next request will be in 2s, otherwise in 200ms.
* As logfiles can be quiet huge, we display at max the last 32k of it! * As logfiles can be quite huge, we display at max the last 32k of it!
* *
* Example usage: * Example usage:
* *
* $error_log = new Api\Json\Tail('/var/log/apache2/error_log'); * $error_log = new Api\Json\Tail('/var/log/apache2/error_log');
* echo $error_log->show(); * echo $error_log->show();
* *
* Strongly prefered for security reasons is to use a path relative to EGroupware's files_dir, * Strongly preferred for security reasons is to use a path relative to EGroupware's files_dir,
* eg. new Api\Json\Tail('groupdav/somelog')! * eg. new Api\Json\Tail('groupdav/somelog')!
*/ */
class Tail class Tail
@ -36,7 +36,7 @@ class Tail
/** /**
* Maximum size of single ajax request * Maximum size of single ajax request
* *
* Currently also maximum size / 4 of displayed logfile content! * Currently, also maximum size / 4 of displayed logfile content!
*/ */
const MAX_CHUNK_SIZE = 8192; const MAX_CHUNK_SIZE = 8192;
@ -194,12 +194,13 @@ class Tail
{ {
throw new Api\Exception\WrongParameter("Not allowed to download '$filename'!"); throw new Api\Exception\WrongParameter("Not allowed to download '$filename'!");
} }
// FIRST: switch off zlib.output_compression, as this would limit downloads in size to memory_limit
ini_set('zlib.output_compression',0);
// SECOND: end all active output buffering
while(ob_end_clean()) {}
Api\Header\Content::type(basename($filename), 'text/plain'); Api\Header\Content::type(basename($filename), 'text/plain');
if ($filename[0] != '/') $filename = $GLOBALS['egw_info']['server']['files_dir'].'/'.$filename; if ($filename[0] != '/') $filename = $GLOBALS['egw_info']['server']['files_dir'].'/'.$filename;
for($n=ob_get_level(); $n > 0; --$n)
{
ob_end_clean(); // stop all output buffering, to NOT run into memory_limit
}
readfile($filename); readfile($filename);
exit; exit;
} }