Rust

Get a Remote File's Size (32-bit)

Demonstrates the Chilkat SFtp.GetFileSize32 method, which returns a remote file's size in bytes as a 32-bit integer. The arguments are the remote path (or handle), whether symbolic links are followed, and whether the first argument is a handle.

Background: A 32-bit signed integer tops out near 2 GB, so this is fine for ordinary files but will misreport or fail for larger ones. When a file might exceed that, use GetFileSizeStr, which returns the size as a decimal string and cannot overflow. The two boolean arguments are shared by all the attribute getters: the first follows symbolic links to their target, and the second says whether you passed a path or an open handle.

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// Demonstrates the SFtp.GetFileSize32 method, which returns a remote file's size in bytes as a
// 32-bit integer.  The 1st argument is the remote path (or handle), the 2nd selects whether
// symbolic links are followed, and the 3rd indicates whether the 1st argument is a handle.

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;
}

// The 2nd argument (bFollowLinks) selects whether a symbolic link is followed to its target.
// The 3rd argument (bIsHandle) is false here because the 1st argument is a path, not an
// open handle.
let b_follow_links = true;
let b_is_handle = false;

let file_size = sftp.get_file_size32("subdir/report.pdf", b_follow_links, b_is_handle);
if file_size < 0 {
    println!("{}", sftp.last_error_text());
    return;
}

println!("File size: {} bytes", file_size);

// Note: For files that may exceed 2 GB, use GetFileSizeStr (returns a decimal string) instead,
// because the value can overflow a 32-bit integer.

sftp.disconnect();