make optional post data as well, remove unnecessary check

Author: simonLeary42

resources/lib/UnityHTTPD.php

@@ -230,24 +230,15 @@ public static function errorHandler(int $severity, string $message, string $file
 
     public static function getPostData(string $key): string
     {
-        if (!array_key_exists("REQUEST_METHOD", $_SERVER)) {
-            throw new RuntimeException('$_SERVER has no array key "REQUEST_METHOD"');
-        }
-        if ($_SERVER["REQUEST_METHOD"] !== "POST") {
-            self::badRequest('$_SERVER["REQUEST_METHOD"] != "POST"');
-        }
         if (!array_key_exists($key, $_POST)) {
             self::badRequest("\$_POST has no array key '$key'");
         }
         return $_POST[$key];
     }
 
-    public static function getOptionalQueryParameter(string $key): ?string
+    public static function getOptionalPostData(string $key): ?string
     {
-        if (!array_key_exists($key, $_GET)) {
-            return null;
-        }
-        return $_GET[$key];
+        return @$_POST[$key];
     }
 
     public static function getQueryParameter(string $key): string
@@ -258,6 +249,11 @@ public static function getQueryParameter(string $key): string
         return $_GET[$key];
     }
 
+    public static function getOptionalQueryParameter(string $key): ?string
+    {
+        return @$_GET[$key];
+    }
+
     public static function getUploadedFileContents(
         string $filename,
         bool $do_delete_tmpfile_after_read = true,