Add request exceptions handling

Author: SerafimArts

README.md

@@ -85,16 +85,37 @@ $factory = new Psr17Factory();
 //
 $psr7 = new PSR7Worker($worker, $factory, $factory, $factory);
 
-while ($request = $psr7->waitRequest()) {
+while (true) {
     try {
+        $request = $psr7->waitRequest();
+    } catch (\Throwable $e) {
+        // Although the PSR-17 specification clearly states that there can be
+	// no exceptions when creating a request, however, some implementations
+	// may violate this rule. Therefore, it is recommended to process the 
+	// incoming request for errors.
+        //
+        // Send "Bad Request" response.
+        $psr7->respond(new Response(400));
+        continue;
+    }
+
+    try {
+        // Here is where the call to your application code will be located. 
+	// For example:
+	//
+        //  $response = $app->send($request);
+        //
         // Reply by the 200 OK response
         $psr7->respond(new Response(200, [], 'Hello RoadRunner!'));
     } catch (\Throwable $e) {
-    
+        // In case of any exceptions in the application code, you should handle
+	// them and inform the client about the presence of a server error.
+	//
         // Reply by the 500 Internal Server Error response
         $psr7->respond(new Response(500, [], 'Something Went Wrong!'));
 
-        // Report error to RoadRunner (optional)
+	// Additionally, we can inform the RoadRunner that the processing 
+	// of the request failed.
         $worker->error((string)$e);
     }
 }