Rust

Upload a Large File in Chunks (FTP)

Demonstrates the Chilkat Ftp2.LargeFileUpload method, which uploads a local file as a sequence of transfers, each up to a given chunk size. The arguments are the local path, the remote path, and the chunk size in bytes.

Note: The local paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

Background: Some servers, proxies, or firewalls impose a limit on the size or duration of a single data transfer, which a very large file can exceed. This method sidesteps that by sending the file in pieces — the first with STOR to create or replace the file, each subsequent one appended — so no single transfer is oversized. Choose a chunk size comfortably under whatever limit you are working around.

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Rust


// Demonstrates the Ftp2.LargeFileUpload method, which uploads a local file as a sequence of
// transfers, each up to a given chunk size.  The 1st argument is the local path, the 2nd is the
// remote path, and the 3rd is the chunk size in bytes.

let ftp = chilkat::Ftp2::new();

ftp.set_hostname("ftp.example.com");
ftp.set_username("myFtpLogin");

// 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.
ftp.set_password("myPassword");

if ftp.connect().is_err() {
    println!("{}", ftp.last_error_text());
    return;
}

// The first chunk is sent with STOR (creating/replacing the remote file); each later chunk is
// appended.  Uploading in chunks can work around server or network limits on a single transfer.
let chunk_size = 10485760;
if ftp.large_file_upload("qa_data/bigfile.zip", "uploads/bigfile.zip", chunk_size).is_err() {
    println!("{}", ftp.last_error_text());
    return;
}

println!("Large file uploaded.");

if ftp.disconnect().is_err() {
    println!("{}", ftp.last_error_text());
    return;
}