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Add UTF8 support and file length basic control. Issue #9 
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‎examples/Arduino_Ethernet/Arduino_Ethernet.ino‎

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/*
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* FtpServer Arduino with Ethernet library and w5100 shield
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*
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* AUTHOR: Renzo Mischianti
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*
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* https://www.mischianti.org/2020/02/08/ftp-server-on-esp8266-and-esp32
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*
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*/
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#include <SPI.h>
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#include <Ethernet.h>
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#include "SD.h"
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#include <SimpleFtpServer.h>
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// Enter a MAC address for your controller below.
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// Newer Ethernet shields have a MAC address printed on a sticker on the shield
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byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xE1 };
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// Set the static IP address to use if the DHCP fails to assign
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byte macAddr[] = {0x5e, 0xa4, 0x18, 0xf0, 0x8a, 0xf2};
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IPAddress arduinoIP(192, 168, 1, 177);
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IPAddress dnsIP(192, 168, 1, 1);
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IPAddress gatewayIP(192, 168, 1, 1);
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IPAddress subnetIP(255, 255, 255, 0);
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FtpServer ftpSrv;
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void setup(void){
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Serial.begin(115200);
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delay(2000);
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// If other chips are connected to SPI bus, set to high the pin connected
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// to their CS before initializing Flash memory
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pinMode( 4, OUTPUT );
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digitalWrite( 4, HIGH );
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pinMode( 10, OUTPUT );
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digitalWrite( 10, HIGH );
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Serial.print("Starting SD.");
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while (!SD.begin(4)) {
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Serial.print(".");
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}
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Serial.println("finish!");
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// start the Ethernet connection:
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Serial.print("Starting ethernet.");
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if (Ethernet.begin(mac) == 0) {
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Serial.println("Failed to configure Ethernet using DHCP");
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Ethernet.begin(macAddr, arduinoIP, dnsIP, gatewayIP, subnetIP);
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}else{
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Serial.println("ok to configure Ethernet using DHCP");
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}
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Serial.print("IP address ");
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Serial.println(Ethernet.localIP());
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Serial.println("SPIFFS opened!");
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ftpSrv.begin("esp8266","esp8266"); //username, password for ftp.
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}
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void loop(void){
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ftpSrv.handleFTP(); //make sure in loop you call handleFTP()!!
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}

‎examples/Arduino_Ethernet_SdFat2/Arduino_Ethernet_SdFat2.ino‎

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/*
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* FtpServer Arduino with Ethernet library and w5100 shield
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* With SdFat version > 2 (full name and more size)
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*
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* #ifndef DEFAULT_FTP_SERVER_NETWORK_TYPE_ARDUINO
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* #define DEFAULT_FTP_SERVER_NETWORK_TYPE_ARDUINO NETWORK_W5100
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* #define DEFAULT_STORAGE_TYPE_ARDUINO STORAGE_SDFAT2
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* #endif
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*
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* AUTHOR: Renzo Mischianti
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*
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* https://www.mischianti.org/2020/02/08/ftp-server-on-esp8266-and-esp32
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*
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*/
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#include <SdFat.h>
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#include <sdios.h>
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#include <FtpServer.h>
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#include <FreeStack.h>
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// Define Chip Select for your SD card according to hardware
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// #define CS_SDCARD 4 // SD card reader of Ehernet shield
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#define CS_SDCARD 4 // Chip Select for SD card reader on Due
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// Define Reset pin for W5200 or W5500
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// set to -1 for other ethernet chip or if Arduino reset board is used
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#define W5x00_RESET -1
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//#define W5x00_RESET 8 // on Due
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// #define W5x00_RESET 3 // on MKR
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// Object for File system
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SdFat sd;
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// Object for FtpServer
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// Command port and Data port in passive mode can be defined here
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// FtpServer ftpSrv( 221, 25000 );
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// FtpServer ftpSrv( 421 ); // Default data port in passive mode is 55600
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FtpServer ftpSrv; // Default command port is 21 ( !! without parenthesis !! )
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// Mac address of ethernet adapter
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// byte mac[] = { 0x90, 0xa2, 0xda, 0x00, 0x00, 0x00 };
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byte mac[] = { 0x00, 0xaa, 0xbb, 0xcc, 0xde, 0xef };
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// IP address of FTP server
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// if set to 0, use DHCP for the routeur to assign IP
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// IPAddress serverIp( 192, 168, 1, 40 );
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IPAddress serverIp( 0, 0, 0, 0 );
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// External IP address of FTP server
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// In passive mode, when accessing the serveur from outside his subnet, it can be
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// necessary with some clients to reply them with the server's external ip address
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// IPAddress externalIp( 192, 168, 1, 2 );
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ArduinoOutStream cout( Serial );
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void setup()
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{
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Serial.begin( 115200 );
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cout << F("=== Test of FTP Server with SdFat ") << SD_FAT_VERSION << F(" file system ===") << endl;
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// If other chips are connected to SPI bus, set to high the pin connected
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// to their CS before initializing Flash memory
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pinMode( 4, OUTPUT );
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digitalWrite( 4, HIGH );
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pinMode( 10, OUTPUT );
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digitalWrite( 10, HIGH );
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// Mount the SD card memory
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cout << F("Mount the SD card memory... ");
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if( ! sd.begin( CS_SDCARD, SD_SCK_MHZ( 50 )))
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{
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cout << F("Unable to mount SD card") << endl;
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while( true ) ;
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}
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pinMode( CS_SDCARD, OUTPUT );
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digitalWrite( CS_SDCARD, HIGH );
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cout << F("ok") << endl;
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// Show capacity and free space of SD card
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cout << F("Capacity of card: ") << long( sd.card()->sectorCount() >> 1 )
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<< F(" kBytes") << endl;
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cout << F("Free space on card: ")
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<< long( sd.vol()->freeClusterCount() * sd.vol()->sectorsPerCluster() >> 1 )
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<< F(" kBytes") << endl;
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// Send reset to Ethernet module
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if( W5x00_RESET > -1 )
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{
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pinMode( W5x00_RESET, OUTPUT );
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digitalWrite( W5x00_RESET, LOW );
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delay( 200 );
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digitalWrite( W5x00_RESET, HIGH );
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delay( 200 );
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}
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// Initialize the network
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cout << F("Initialize ethernet module ... ");
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if( serverIp[0] != 0 )
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Ethernet.begin( mac, serverIp );
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else if( Ethernet.begin( mac ) == 0 )
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{
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cout << F("failed!") << endl;
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while( true ) ;
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}
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uint16_t wizModule[] = { 0, 5100, 5200, 5500 };
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cout << F("W") << wizModule[ Ethernet.hardwareStatus()] << F(" ok") << endl;
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serverIp = Ethernet.localIP();
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cout << F("IP address of server: ")
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<< int( serverIp[0]) << "." << int( serverIp[1]) << "."
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<< int( serverIp[2]) << "." << int( serverIp[3]) << endl;
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// Initialize the FTP server
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ftpSrv.begin("user","password");
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// ftpSrv.init( externalIp );
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// ftpSrv.init( IPAddress( 11, 22, 33, 44 ));
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// Default username and password are set to 'arduino' and 'test'
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// but can then be changed by calling ftpSrv.credentials()
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// ftpSrv.credentials( "myname", "123" );
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cout << F("Free stack: ") << FreeStack() << endl;
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cout << "Viaaa!";
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}
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void loop()
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{
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ftpSrv.handleFTP();
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// more processes...
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}

‎examples/Arduino_esp32_SD/Arduino_esp32_SD.ino‎

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/*
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* FtpServer esp8266 and esp32 with SD
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*
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* AUTHOR: Renzo Mischianti
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*
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* https://www.mischianti.org/2020/02/08/ftp-server-on-esp8266-and-esp32
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*
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*/
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#include <WiFi.h>
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#include "SD.h"
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#include <SimpleFTPServer.h>
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const char* ssid = "<YOUR-SSID>";
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const char* password = "<YOUR-PASSWD>";
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FtpServer ftpSrv; //set #define FTP_DEBUG in ESP8266FtpServer.h to see ftp verbose on serial
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void _callback(FtpOperation ftpOperation, unsigned int freeSpace, unsigned int totalSpace){
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Serial.print(">>>>>>>>>>>>>>> _callback " );
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Serial.print(ftpOperation);
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/* FTP_CONNECT,
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* FTP_DISCONNECT,
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* FTP_FREE_SPACE_CHANGE
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*/
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Serial.print(" ");
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Serial.print(freeSpace);
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Serial.print(" ");
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Serial.println(totalSpace);
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// freeSpace : totalSpace = x : 360
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if (ftpOperation == FTP_CONNECT) Serial.println(F("CONNECTED"));
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if (ftpOperation == FTP_DISCONNECT) Serial.println(F("DISCONNECTED"));
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};
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void _transferCallback(FtpTransferOperation ftpOperation, const char* name, unsigned int transferredSize){
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Serial.print(">>>>>>>>>>>>>>> _transferCallback " );
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Serial.print(ftpOperation);
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/* FTP_UPLOAD_START = 0,
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* FTP_UPLOAD = 1,
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*
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* FTP_DOWNLOAD_START = 2,
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* FTP_DOWNLOAD = 3,
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*
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* FTP_TRANSFER_STOP = 4,
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* FTP_DOWNLOAD_STOP = 4,
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* FTP_UPLOAD_STOP = 4,
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*
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* FTP_TRANSFER_ERROR = 5,
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* FTP_DOWNLOAD_ERROR = 5,
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* FTP_UPLOAD_ERROR = 5
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*/
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Serial.print(" ");
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Serial.print(name);
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Serial.print(" ");
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Serial.println(transferredSize);
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};
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void setup(void){
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Serial.begin(115200);
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WiFi.begin(ssid, password);
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Serial.println("");
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// Wait for connection
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while (WiFi.status() != WL_CONNECTED) {
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delay(500);
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Serial.print(".");
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}
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Serial.println("");
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Serial.print("Connected to ");
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Serial.println(ssid);
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Serial.print("IP address: ");
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Serial.println(WiFi.localIP());
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/////FTP Setup, ensure SPIFFS is started before ftp; /////////
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/////FTP Setup, ensure SPIFFS is started before ftp; /////////
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SPI.begin(14, 2, 15, 13); //SCK, MISO, MOSI,SS
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if (SD.begin(13, SPI)) {
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Serial.println("SD opened!");
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ftpSrv.setCallback(_callback);
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ftpSrv.setTransferCallback(_transferCallback);
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ftpSrv.begin("esp8266","esp8266"); //username, password for ftp. (default 21, 50009 for PASV)
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}
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}
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void loop(void){
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ftpSrv.handleFTP(); //make sure in loop you call handleFTP()!!
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// server.handleClient(); //example if running a webserver you still need to call .handleClient();
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}

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