Rust

Debugging with Socket Session Logging

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Debugging with socket session logging.

The Chilkat Socket component provides properties for keeping a session log making it possible to see the exact bytes received and sent on a TCP/IP or SSL connection. To enable session logging, set the KeepSessionLog property = _TRUE_. The SessionLogEncoding property controls how binary, non-printable bytes are represented in the log. There are two possible settings: Possible values are "esc" and "hex". The default value is "esc".

When set to "hex", the bytes are encoded as a hexidecimalized string. The "esc" encoding is a C-string like encoding, and is more compact than hex if most of the data to be logged is text. Printable us-ascii chars are unmodified. Common "C" control chars are represented as "\r", "\n", "\t", etc. Non-printable and byte values greater than 0x80 are escaped using a backslash and hex encoding: \xHH. Certain printable chars are backslashed: SPACE, double-quote, single-quote, etc.

Rust

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

let socket = chilkat::Socket::new();

// Enable session logging:
socket.set_keep_session_log(true);
socket.set_session_log_encoding("esc");

// To demonstrate session logging, we'll connect to an
// HTTP server and download the HTTP response header:
let ssl = false;
let max_wait_millisec = 20000;
if socket.connect("www.chilkatsoft.com", 80, ssl, max_wait_millisec).is_err() {
    println!("{}", socket.last_error_text());
    return;
}

// Set maximum timeouts for reading an writing (in millisec)
socket.set_max_read_idle_ms(10000);
socket.set_max_send_idle_ms(10000);

// The socket component includes a BuildHttpGetRequest
// method for convenience. Build a GET and send it to 
// the web server:
let http_get = socket.build_http_get_request("http://www.chilkatsoft.com/").unwrap_or_default();

// Send it...
if socket.send_string(&http_get).is_err() {
    println!("{}", socket.last_error_text());
    return;
}

// Read the response up to the first double CRLF:
let Ok(http_header) = socket.receive_until_match("\r\n\r\n") else {
    println!("{}", socket.last_error_text());
    return;
};

// Close the connection with the server
// Wait a max of 20 seconds (20000 millsec)
let _ = socket.close(20000).is_ok();

// Display the session log:
println!("{}", socket.session_log());

// Show the HTTP response header:
println!("{}", http_header);