Handing a web request with Mongoose

char const *kHeader =   "HTTP/1.1 200 OK\r\n"
                        "Content-Type: %s\r\n"
                        "Content-Length: %d\r\n"
                        "\r\n";

static void *eventHandler(enum mg_event event, struct mg_connection *connection, const struct mg_request_info *requestInfo)
{
   void *processed = "done";

   switch(event)
   {
      case MG_NEW_REQUEST:

         NSLog(@"%s", requestInfo->uri);

         char *content = "Hello world!\n";
         char *mimeType = "text/plain";
         size_t contentLength = strlen(content);

         mg_printf(connection, kHeader, mimeType, contentLength);
         mg_write(connection, content, contentLength);
         break;

      default:
         NSLog(@"Unsupported event, letting Mongoose take care of it!");
         processed = NULL;
         break;
   }

   return processed;
}