[2.1.0] Refactor AttrDef_URI: removed URIParser functionality

- Genericized flush-definition-cache script git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@1333 48356398-32a2-884e-a903-53898d9a118a
2025-08-06 14:16:32 +02:00 · 2007-08-01 14:55:09 +00:00
parent 2a002857ce
commit 8c9dbe142d
8 changed files with 237 additions and 206 deletions
--- a/library/HTMLPurifier/URIParser.php
+++ b/library/HTMLPurifier/URIParser.php
@@ -0,0 +1,58 @@
+<?php
+
+/**
+ * Parses a URI into the components and fragment identifier as specified
+ * by RFC 2396.
+ */
+class HTMLPurifier_URIParser
+{
+    
+    /**
+     * Parses a URI
+     * @param $uri string URI to parse
+     * @return array(userinfo, host, int port, path, query, fragment) components
+     */
+    function parse($uri) {
+        $r_URI = '!'.
+            '(([^:/?#<>\'"]+):)?'. // 2. Scheme
+            '(//([^/?#<>\'"]*))?'. // 4. Authority
+            '([^?#<>\'"]*)'.       // 5. Path
+            '(\?([^#<>\'"]*))?'.   // 7. Query
+            '(#([^<>\'"]*))?'.     // 8. Fragment
+            '!';
+        
+        $matches = array();
+        $result = preg_match($r_URI, $uri, $matches);
+        
+        if (!$result) return false; // *really* invalid URI
+        
+        // seperate out parts
+        $scheme     = !empty($matches[1]) ? $matches[2] : null;
+        $authority  = !empty($matches[3]) ? $matches[4] : null;
+        $path       = $matches[5]; // always present, can be empty
+        $query      = !empty($matches[6]) ? $matches[7] : null;
+        $fragment   = !empty($matches[8]) ? $matches[9] : null;
+        
+        // further parse authority
+        if ($authority !== null) {
+            // ridiculously inefficient: it's a stacked regex!
+            $HEXDIG = '[A-Fa-f0-9]';
+            $unreserved = 'A-Za-z0-9-._~'; // make sure you wrap with []
+            $sub_delims = '!$&\'()'; // needs []
+            $pct_encoded = "%$HEXDIG$HEXDIG";
+            $r_userinfo = "(?:[$unreserved$sub_delims:]|$pct_encoded)*";
+            $r_authority = "/^(($r_userinfo)@)?(\[[^\]]+\]|[^:]*)(:(\d*))?/";
+            $matches = array();
+            preg_match($r_authority, $authority, $matches);
+            $userinfo   = !empty($matches[1]) ? $matches[2] : null;
+            $host       = !empty($matches[3]) ? $matches[3] : '';
+            $port       = !empty($matches[4]) ? (int) $matches[5] : null;
+        } else {
+            $port = $host = $userinfo = null;
+        }
+        
+        return array($scheme, $userinfo, $host, $port, $path, $query, $fragment);
+    }
+    
+}
+