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MDL-50891 useragent: Move web crawler checks to useragent class

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This commit is contained in:
Andrew Nicols 2015-08-05 15:20:23 +08:00
parent 6d392b3027
commit 34c6ec1869
6 changed files with 283 additions and 90 deletions
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39
lib/setuplib.php
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@ -1692,45 +1692,6 @@ function make_localcache_directory($directory, $exceptiononerror = true) {
return make_writable_directory("$CFG->localcachedir/$directory", $exceptiononerror);
}
/**
* Checks if current user is a web crawler.
*
* This list can not be made complete, this is not a security
* restriction, we make the list only to help these sites
* especially when automatic guest login is disabled.
*
* If admin needs security they should enable forcelogin
* and disable guest access!!
*
* @return bool
*/
function is_web_crawler() {
if (!empty($_SERVER['HTTP_USER_AGENT'])) {
if (strpos($_SERVER['HTTP_USER_AGENT'], 'Googlebot') !== false ) {
return true;
} else if (strpos($_SERVER['HTTP_USER_AGENT'], 'google.com') !== false ) { // Google
return true;
} else if (strpos($_SERVER['HTTP_USER_AGENT'], 'Yahoo! Slurp') !== false ) { // Yahoo
return true;
} else if (strpos($_SERVER['HTTP_USER_AGENT'], '[ZSEBOT]') !== false ) { // Zoomspider
return true;
} else if (stripos($_SERVER['HTTP_USER_AGENT'], 'msnbot') !== false ) { // MSN Search
return true;
} else if (strpos($_SERVER['HTTP_USER_AGENT'], 'bingbot') !== false ) { // Bing
return true;
} else if (strpos($_SERVER['HTTP_USER_AGENT'], 'Yandex') !== false ) {
return true;
} else if (strpos($_SERVER['HTTP_USER_AGENT'], 'AltaVista') !== false ) {
return true;
} else if (stripos($_SERVER['HTTP_USER_AGENT'], 'baiduspider') !== false ) { // Baidu
return true;
} else if (strpos($_SERVER['HTTP_USER_AGENT'], 'Teoma') !== false ) { // Ask.com
return true;
}
}
return false;
}
/**
* This class solves the problem of how to initialise $OUTPUT.
*