Incorporate feedback: LegacyBridge uses request for mapping.

Author: jzohrab

migration.rst

@@ -323,8 +323,9 @@ somewhat like this::
          * If your mapping is complicated, you may want to write unit tests
          * to verify your logic, hence this is public static.
          */
-        public static function getLegacyScript(string $requestPathInfo): string
+        public static function getLegacyScript(Request $request): string
         {
+            $requestPathInfo = $request->getPathInfo();
             $legacyRoot = __DIR__ . '/../';
 
             // Map a route to a legacy script:
@@ -345,11 +346,11 @@ somewhat like this::
 
         public static function handleRequest(Request $request, Response $response, string $publicDirectory): ?string
         {
-            $p = $request->getPathInfo();
-            $legacyScriptFilename = LegacyBridge::getLegacyScript($p);
+            $legacyScriptFilename = LegacyBridge::getLegacyScript($request);
 
             // Possibly (re-)set some env vars (e.g. to handle forms
             // posting to PHP_SELF):
+            $p = $request->getPathInfo();
             $_SERVER['PHP_SELF'] = $p;
             $_SERVER['SCRIPT_NAME'] = $p;
             $_SERVER['SCRIPT_FILENAME'] = $legacyScriptFilename;