How use USBstorage ant wifiwebserver on ARDUINO GIGA

Official Hardware Mega GIGA R1 WiFi
1

I try to use a usb storage to send a page HTML.
im not understanding how open the file and send it with wifiwebserver.


// #ifndef defines_h
// #define defines_h

#define DEBUG_WIFI_WEBSERVER_PORT Serial

#define _WIFI_LOGLEVEL_ 4
#define _WIFININA_LOGLEVEL_ 3

#if (defined(ARDUINO_PORTENTA_H7_M7) || defined(ARDUINO_PORTENTA_H7_M4) || defined(ARDUINO_GIGA))

#if defined(BOARD_NAME)
#undef BOARD_NAME
#endif

#if defined(CORE_CM7)
#warning Using Portenta H7 M7 core
#define BOARD_NAME "PORTENTA_H7_M7"
#else
#warning Using Portenta H7 M4 core
#define BOARD_NAME "PORTENTA_H7_M4"
#endif

#define USE_WIFI_PORTENTA_H7 true

#define USE_WIFI_NINA false

#define USE_WIFI_CUSTOM false


#endif


#if USE_WIFI_PORTENTA_H7
#warning Using Portenta H7 WiFi
#define SHIELD_TYPE "Portenta_H7 WiFi"
#endif

#ifndef BOARD_NAME
#if defined(ARDUINO_BOARD)
#define BOARD_NAME ARDUINO_BOARD
#elif defined(BOARD_TYPE)
#define BOARD_NAME BOARD_TYPE
#else
#define BOARD_NAME "Unknown Board"
#endif
#endif

#include "WiFiWebServer.h"

#include "arduino_secrets.h"
// #include "defines.h"
#include "Arduino_USBHostMbed5.h"
#include "DigitalOut.h"
#include "FATFileSystem.h"

USBHostMSD msd;
mbed::FATFileSystem usb("usb");
mbed::fs_file_t file;

char *ssid = SECRET_SSID;
char *pass = SECRET_PASS;

int status = WL_IDLE_STATUS;  // the Wifi radio's status

IPAddress ip(192, 168, 1, 39);

WiFiWebServer server(80);

void handleCSS() {
  FILE *file = fopen("/usb/index.html", "r");
  server.streamFile(file, "text/html");
  fflush(stdout);
  server.send(200);
}

void handleNotFound() {
  server.send(404, "text/plain", "404: Not found");
}

void WIFIsetup() {

  while (!msd.connect()) {
    delay(1000);
  }
  while (!Serial && millis() < 5000)
    ;
  WiFi.config(ip);

  status = WiFi.begin(ssid, pass);

  while (status != WL_CONNECTED) {
    delay(500);
    status = WiFi.status();
  }

  server.on("/", HTTP_GET, handleCSS);

  server.onNotFound(handleNotFound);

  server.begin();

  Serial.print(WiFi.localIP());
}

void WIFIloop() {
  server.handleClient();
}

Any clue?
maybe im not using correct library?

2

WIFILOOP()
{
}

???
Is it new ?

Best regards