ThatProject/ESP8266_Twitter_Hash_Search/List_SPIFFS.h

//https://github.com/Bodmer/TJpg_Decoder
/***************************************************************************************
** Function name:           listSPIFFS
** Description:             Listing SPIFFS files
***************************************************************************************/
#ifdef ESP8266
void listSPIFFS(void) {
  Serial.println(F("\r\nListing SPIFFS files:"));

  fs::Dir dir = SPIFFS.openDir("/"); // Root directory

  static const char line[] PROGMEM =  "=================================================";
  Serial.println(FPSTR(line));
  Serial.println(F("  File name                              Size"));
  Serial.println(FPSTR(line));

  while (dir.next()) {
    String fileName = dir.fileName();
    Serial.print(fileName);
    int spaces = 33 - fileName.length(); // Tabulate nicely
    if (spaces < 1) spaces = 1;
    while (spaces--) Serial.print(" ");

    fs::File f = dir.openFile("r");
    String fileSize = (String) f.size();
    spaces = 10 - fileSize.length(); // Tabulate nicely
    if (spaces < 1) spaces = 1;
    while (spaces--) Serial.print(" ");
    Serial.println(fileSize + " bytes");
  }

  Serial.println(FPSTR(line));
  Serial.println();
  delay(1000);
}

//====================================================================================

#elif defined ESP32

void listSPIFFS(void) {
  Serial.println(F("\r\nListing SPIFFS files:"));
  static const char line[] PROGMEM =  "=================================================";

  Serial.println(FPSTR(line));
  Serial.println(F("  File name                              Size"));
  Serial.println(FPSTR(line));

  fs::File root = SPIFFS.open("/");
  if (!root) {
    Serial.println(F("Failed to open directory"));
    return;
  }
  if (!root.isDirectory()) {
    Serial.println(F("Not a directory"));
    return;
  }

  fs::File file = root.openNextFile();
  while (file) {

    if (file.isDirectory()) {
      Serial.print("DIR : ");
      String fileName = file.name();
      Serial.print(fileName);
    } else {
      String fileName = file.name();
      Serial.print("  " + fileName);
      // File path can be 31 characters maximum in SPIFFS
      int spaces = 33 - fileName.length(); // Tabulate nicely
      if (spaces < 1) spaces = 1;
      while (spaces--) Serial.print(" ");
      String fileSize = (String) file.size();
      spaces = 10 - fileSize.length(); // Tabulate nicely
      if (spaces < 1) spaces = 1;
      while (spaces--) Serial.print(" ");
      Serial.println(fileSize + " bytes");
    }

    file = root.openNextFile();
  }

  Serial.println(FPSTR(line));
  Serial.println();
  delay(1000);
}

#endif