const char *hostname = "EDGE_HOST";

const char *username = "FTP_USR";

const char *password = "FTP_PWD";

const char *local_path = "hello.txt";

const char *remote_path = "cpp-hello.txt";

int port = 22;

// Initialize libssh2

if (libssh2_init(0) != 0) {

std::cerr << "libssh2 initialization failed" << std::endl;

return 1;

}

// Create socket and connect

hostent *host = gethostbyname(hostname);

if (!host) {

std::cerr << "Failed to resolve hostname" << std::endl;

return 1;

}

int sock = socket(AF_INET, SOCK_STREAM, 0);

sockaddr_in sin;

sin.sin_family = AF_INET;

sin.sin_port = htons(port);

sin.sin_addr.s_addr = *(unsigned long*)host->h_addr;

if (connect(sock, (struct sockaddr*)(&sin), sizeof(sockaddr_in)) != 0) {

std::cerr << "Failed to connect to " << hostname << std::endl;

return 1;

}

// Start SSH session

LIBSSH2_SESSION *session = libssh2_session_init();

if (libssh2_session_handshake(session, sock)) {

std::cerr << "SSH session handshake failed" << std::endl;

return 1;

}

// Authenticate

if (libssh2_userauth_password(session, username, password)) {

std::cerr << "Authentication failed" << std::endl;

return 1;

}

// Create SFTP session

LIBSSH2_SFTP *sftp = libssh2_sftp_init(session);

if (!sftp) {

std::cerr << "Unable to init SFTP session" << std::endl;

return 1;

}

// Open remote file

LIBSSH2_SFTP_HANDLE *sftp_handle =

libssh2_sftp_open(sftp, remote_path,

LIBSSH2_FXF_WRITE|LIBSSH2_FXF_CREAT|LIBSSH2_FXF_TRUNC,

S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);

if (!sftp_handle) {

std::cerr << "Unable to open remote file" << std::endl;

return 1;

}

// Read local file and upload

std::ifstream local(local_path, std::ios::binary);

if (!local) {

std::cerr << "Unable to open local file" << std::endl;

return 1;

}

char buffer[1024];

while (local) {

local.read(buffer, sizeof(buffer));

std::streamsize nread = local.gcount();

if (nread > 0) {

char *ptr = buffer;

while (nread > 0) {

int rc = libssh2_sftp_write(sftp_handle, ptr, nread);

if (rc < 0) break;

ptr += rc;

nread -= rc;

}

}

}

local.close();

libssh2_sftp_close(sftp_handle);

libssh2_sftp_shutdown(sftp);

libssh2_session_disconnect(session, "Normal Shutdown");

libssh2_session_free(session);

close(sock);

libssh2_exit();

std::cout << "Uploaded " << local_path << " to " << remote_path << std::endl;

return 0;