Add setup checker

Actions/Setup.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace Sandpiper\Actions;
+
+class index extends \Sandpiper\AbstractAction
+{
+	
+	public function __construct()
+	{
+	}
+	
+	public function handle() {
+		global $settings;
+		
+		$uri_root = dirname("http://" . $_SERVER["HTTP_HOST"] . $_SERVER["SCRIPT_NAME"]);
+		
+		$toml_response_code = $this->get_response_code("$uri_root/settings.toml");
+		
+		if($toml_response_code >= 200 && $toml_response_code < 300)
+			send_error(503, "Error: The settings file is visible from the web!");
+		
+		header("content-type: text/plain");
+		exit("Your setup looks ok :-)");
+	}
+	
+	protected function get_response_code($url) {
+		stream_context_set_default([ 'http' => [ 'method' => 'HEAD' ] ]);
+		
+		$headers = get_headers($url);
+		return intval(explode(" ", $headers[0])[1]);
+	}
+}