- Gracefully error out of obscure bug involving non-static autoloaders

- Test multiple autoloaders
- Remove local URL test; doesn't work for other people

git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@1565 48356398-32a2-884e-a903-53898d9a118a

library/HTMLPurifier.autoload.php

@@ -5,7 +5,8 @@
  * Convenience file that registers autoload handler for HTML Purifier.
  */
 
-if (function_exists('spl_autoload_register')) {
+if (function_exists('spl_autoload_register') && function_exists('spl_autoload_unregister')) {
+    // We need unregister for our pre-registering functionality
     HTMLPurifier_Bootstrap::registerAutoload();
     if (function_exists('__autoload')) {
         // Be polite and ensure that userland autoload gets retained

library/HTMLPurifier/Bootstrap.php

@@ -62,8 +62,30 @@ class HTMLPurifier_Bootstrap
         $autoload = array('HTMLPurifier_Bootstrap', 'autoload');
         if ( ($funcs = spl_autoload_functions()) === false ) {
             spl_autoload_register($autoload);
-        } else {
-            foreach ($funcs as $func) spl_autoload_unregister($func);
+        } elseif (function_exists('spl_autoload_unregister')) {
+            $compat = version_compare(PHP_VERSION, '5.1.2', '<=') &&
+                      version_compare(PHP_VERSION, '5.1.0', '>=');
+            foreach ($funcs as $func) {
+                if (is_array($func)) {
+                    // :TRICKY: There are some compatibility issues and some
+                    // places where we need to error out
+                    $reflector = new ReflectionMethod($func[0], $func[1]);
+                    if (!$reflector->isStatic()) {
+                        throw new Exception('
+                            HTML Purifier autoloader registrar is not compatible
+                            with non-static object methods due to PHP Bug #44144;
+                            Please do not use HTMLPurifier.autoload.php (or any
+                            file that includes this file); instead, place the code:
+                            spl_autoload_register(array(\'HTMLPurifier_Bootstrap\', \'autoload\'))
+                            after your own autoloaders.
+                        ');
+                    }
+                    // Suprisingly, spl_autoload_register supports the
+                    // Class::staticMethod callback format, although call_user_func doesn't
+                    if ($compat) $func = implode('::', $func);
+                }
+                spl_autoload_unregister($func);
+            }
             spl_autoload_register($autoload);
             foreach ($funcs as $func) spl_autoload_register($func);
         }

tests/HTMLPurifier/PHPT/loading/auto-with-spl-autoload.phpt

@@ -12,6 +12,16 @@ function my_autoload($class) {
     eval("class $class {}");
     return true;
 }
+class MyClass {
+    public static function myAutoload($class) {
+        if ($class == 'Foo') {
+            echo "Special autoloading Foo..." . PHP_EOL;
+            eval("class $class {}");
+        }
+    }
+}
+
+spl_autoload_register(array('MyClass', 'myAutoload'));
 spl_autoload_register('my_autoload');
 
 require '../library/HTMLPurifier.auto.php';
@@ -20,9 +30,11 @@ $config = HTMLPurifier_Config::createDefault();
 $purifier = new HTMLPurifier($config);
 echo $purifier->purify('<b>Salsa!') . PHP_EOL;
 
-// purposely invoke older autoload
+// purposely invoke older autoloads
+$foo = new Foo();
 $bar = new Bar();
 
 --EXPECT--
 <b>Salsa!</b>
+Special autoloading Foo...
 Autoloading Bar...

tests/HTMLPurifier/PHPT/loading/error-auto-with-spl-nonstatic-autoload.phpt

@@ -0,0 +1,29 @@
+--TEST--
+Error when registering autoload with non-static autoload already on SPL stack
+--SKIPIF--
+<?php
+if (!function_exists('spl_autoload_register')) {
+    echo "skip - spl_autoload_register() not available";
+}
+--FILE--
+<?php
+class NotStatic
+{
+    public function autoload($class) {
+        echo "Autoloading... $class" . PHP_EOL;
+        eval("class $class {}");
+    }
+}
+
+$obj = new NotStatic();
+spl_autoload_register(array($obj, 'autoload'));
+
+try {
+    require '../library/HTMLPurifier.auto.php';
+} catch (Exception $e) {
+    echo 'Caught error gracefully';
+    assert('strpos($e->getMessage(), "44144") !== false');
+}
+
+--EXPECT--
+Caught error gracefully

tests/multitest.php

@@ -106,7 +106,6 @@ foreach ($versions_to_test as $version) {
 
 // This is the HTML Purifier website's test XML file. We could
 // add more websites, i.e. more configurations to test.
-$test->addTestCase(new RemoteTestCase('http://localhost/htmlpurifier/tests/?xml=1', 'http://localhost/htmlpurifier/tests/?xml=1&dry=1'));
 $test->addTestCase(new RemoteTestCase('http://htmlpurifier.org/dev/tests/?xml=1', 'http://htmlpurifier.org/dev/tests/?xml=1&dry=1'));
 
 if ($AC['xml']) {