Initial commit.

2013-05-17 23:38:44 +02:00
commit 7fc40728f5
1334 changed files with 164883 additions and 0 deletions
@@ -0,0 +1,46 @@
+<?php
+
+/**
+ * Class that handles operations involving percent-encoding in URIs.
+ */
+class HTMLPurifier_PercentEncoder
+{
+    
+    /**
+     * Fix up percent-encoding by decoding unreserved characters and normalizing
+     * @param $string String to normalize
+     */
+    public function normalize($string) {
+        if ($string == '') return '';
+        $parts = explode('%', $string);
+        $ret = array_shift($parts);
+        foreach ($parts as $part) {
+            $length = strlen($part);
+            if ($length < 2) {
+                $ret .= '%25' . $part;
+                continue;
+            }
+            $encoding = substr($part, 0, 2);
+            $text     = substr($part, 2);
+            if (!ctype_xdigit($encoding)) {
+                $ret .= '%25' . $part;
+                continue;
+            }
+            $int = hexdec($encoding);
+            if (
+                ($int >= 48 && $int <= 57) || // digits
+                ($int >= 65 && $int <= 90) || // uppercase letters
+                ($int >= 97 && $int <= 122) || // lowercase letters
+                $int == 126 || $int == 45 || $int == 46 || $int == 95 // ~-._
+            ) {
+                $ret .= chr($int) . $text;
+                continue;
+            }
+            $encoding = strtoupper($encoding);
+            $ret .= '%' . $encoding . $text;
+        }
+        return $ret;
+    }
+    
+}
+