Write Text at a 32-bit Offset in a Remote SFTP File

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Demonstrates the Chilkat SFtp.WriteFileText32 method, which encodes text and writes it at a specific 32-bit byte offset in an open handle. The arguments are the handle, the offset, the charset, and the text.

// Demonstrates the SFtp.WriteFileText32 method, which encodes text and writes it at a specific
// 32-bit byte offset in an open handle.  The 1st argument is the handle, the 2nd is the offset,
// the 3rd is the charset, and the 4th is the text.

let sftp = chilkat::SFtp::new();

// Connect, authenticate, and initialize the SFTP subsystem.
let port = 22;
if sftp.connect("sftp.example.com", port).is_err() {
    println!("{}", sftp.last_error_text());
    return;
}

// Normally you would not hard-code the password in source.  You should instead obtain it
// from an interactive prompt, environment variable, or a secrets vault.
let password = "mySshPassword".to_string();

if sftp.authenticate_pw("mySshLogin", &password).is_err() {
    println!("{}", sftp.last_error_text());
    return;
}

if sftp.initialize_sftp().is_err() {
    println!("{}", sftp.last_error_text());
    return;
}

// Open the remote file for read/write so an existing file can be modified in place.
let Ok(handle) = sftp.open_file("subdir/record.dat", "readWrite", "openOrCreate") else {
    println!("{}", sftp.last_error_text());
    return;
};

// Overwrite 5 bytes starting at offset 10.  The offset is a byte position, not a character
// position, so it must account for the encoded size of any multibyte characters.
let offset = 10;
if sftp.write_file_text32(&handle, offset, "utf-8", "HELLO").is_err() {
    println!("{}", sftp.last_error_text());
    return;
}

if sftp.close_handle(&handle).is_err() {
    println!("{}", sftp.last_error_text());
    return;
}

println!("Wrote at the specified offset.");

sftp.disconnect();