83 lines
3 KiB
PHP
83 lines
3 KiB
PHP
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<?php
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function sitematch($key,$site){
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// Add double slashes to key and site if no scheme is set.
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// Basically: if no double slashes present before any dots,shashes or @s.
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if(!\preg_match_all('#^[^./@]*?//#',$key )) {
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$key = "//".$key;
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}
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if(!\preg_match_all('#^[^./@]*?//#',$site)) {
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$site = "//".$site;
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}
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// Use parse_url() to split path and host.
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$keyurl = (object)\parse_url($key);
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$siteurl = (object)\parse_url($site);
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// No match if host is empty on key or site
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if (empty($keyurl->host) || empty($siteurl->host)) {
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return false;
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}
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if ($keyurl->host == "*") {
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// * matches all
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return true;
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}
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// First match the host part.
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$keyparts = \array_reverse(\explode(".",$keyurl->host));
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$siteparts = \array_reverse(\explode(".",$siteurl->host));
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// Trim starting www from both parts, since site.domain and www.site.domain should be treated as the same.
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if (($x = \array_pop($keyparts)) != "www") {\array_push($keyparts,$x);}
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if (($x = \array_pop($siteparts)) != "www") {\array_push($siteparts,$x);}
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for ($i = 0; $i < count($keyparts); $i++) {
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// No match if the site does not have a part, but the key does. Unless the key part is *
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if (!isset($siteparts[$i]) ) {
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if($keyparts[$i] != "*") {
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return false;
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} else {
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$i++; //increment $i by one before break, to make sure the comparison following this loop holds.
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break; // Stop comparison. Host part matches.
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}
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}
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// Now do a proper case insensitive check for matching.
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// Uses fnmatch to easily handle shell type wildcards.
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if ( ! \fnmatch($keyparts[$i],$siteparts[$i],\FNM_CASEFOLD)) {
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return false;
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}
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}
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// Fail if the site has a deeper subdomain than the key, unless the deepest key subdomain is *
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if ($keyparts[$i-1] != '*' && count($siteparts) > ($i)) {
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return false;
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}
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// If we made it here then the host part matches. Now check the path.
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// If path is /*, matches all subpaths including /
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$keypath = empty($keyurl->path)?"/":$keyurl->path;
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$sitepath = empty($siteurl->path)?"/":$siteurl->path;
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// Trim trailing / from both paths before comparison
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if (\strlen($sitepath) > 1) {
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$sitepath = \rtrim($sitepath,"/");
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}
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if (\strlen($keypath) > 1) {
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$keypath = \rtrim($keypath,"/");
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}
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// Do a case insensitive fnmatch on the site so wildcards are matched too.
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return \fnmatch($keypath,$sitepath,\FNM_CASEFOLD);
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}
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$tests = [
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["*", "https://www.miqra.nl"],
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["*/*", "https://www.miqra.nl"],
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["*", "https://clients.openedu.nl/fith"],
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["clients.openedu.nl/fith", "https://clients.openedu.nl/fith/"],
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["clients.openedu.nl/fith/", "https://clients.openedu.nl/fith"]
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];
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foreach($tests as $test) {
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[$key, $site] = $test;
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print("Checking key '{$key}' on site '{$site}': " . (sitematch($key,$site)?"MATCH":"FAIL") . "\n");
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}
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