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implement user agent filter

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A new live-only filter block for user agent strings is now available.
It features the known exact, keyword and regular expression modes.
This commit is contained in:
Stefan Kalscheuer
2020-10-19 11:52:48 +02:00
parent e5c30c2183
commit a6cc821089
4 changed files with 254 additions and 1 deletions
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63
inc/class-statifyblacklist.php
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@ -91,7 +91,10 @@ class StatifyBlacklist {
self::update_options();
// Add Filter to statify hook if enabled.
if ( 0 !== self::$options['referer']['active'] || 0 !== self::$options['target']['active'] || 0 !== self::$options['ip']['active'] ) {
if ( 0 !== self::$options['referer']['active'] ||
0 !== self::$options['target']['active'] ||
0 !== self::$options['ip']['active'] ||
0 !== self::$options['ua']['active'] ) {
add_filter( 'statify__skip_tracking', array( 'StatifyBlacklist', 'apply_blacklist_filter' ) );
}
@ -156,6 +159,11 @@ class StatifyBlacklist {
'active' => 0,
'blacklist' => array(),
),
'ua' => array(
'active' => 0,
'regexp' => 0,
'blacklist' => array(),
),
'version' => self::VERSION_MAIN,
);
}
@ -264,6 +272,59 @@ class StatifyBlacklist {
}
}
// User agent filter (since 1.6).
if ( isset( self::$options['ua']['active'] ) && 0 !== self::$options['ua']['active'] ) {
// Determine filter mode.
$mode = isset( self::$options['ua']['regexp'] ) ? intval( self::$options['ua']['regexp'] ) : 0;
// Get full user agent string.
if ( ! empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
$user_agent = filter_var( wp_unslash( $_SERVER['HTTP_USER_AGENT'] ), FILTER_SANITIZE_STRING );
if ( $user_agent ) {
switch ( $mode ) {
// Regular Expression filtering since 1.3.0.
case self::MODE_REGEX:
case self::MODE_REGEX_CI:
// Merge given regular expressions into one.
$regexp = self::regex(
array_keys( self::$options['ua']['blacklist'] ),
self::MODE_REGEX_CI === self::$options['ua']['regexp']
);
// Check filter (no return to continue filtering #12).
if ( 1 === preg_match( $regexp, $user_agent ) ) {
return true;
}
break;
// Keyword filter since 1.5.0 (#15).
case self::MODE_KEYWORD:
// Get filter.
$blacklist = self::$options['ua']['blacklist'];
foreach ( array_keys( $blacklist ) as $keyword ) {
if ( false !== strpos( strtolower( $user_agent ), strtolower( $keyword ) ) ) {
return true;
}
}
break;
// Standard exact filter.
default:
// Get filter.
$blacklist = self::$options['ua']['blacklist'];
// Check filter.
if ( isset( $blacklist[ $user_agent ] ) ) {
return true;
}
}
}
}
}
// Skip and continue (return NULL), if all filters are inactive.
return null;
}