Rust

Send and Receive WebSocket Frame

See more WebSocket Examples

Demonstrates how to send a websocket text frame to a websocket echo server. This example uses Chilkat's websocket test echo server at ws://websockets.chilkat.io/wsChilkatEcho.ashx

Note: The websockets.chilkat.io server imposes the following limitations:
Messages must be 16K or less, and each connection is limited to a max of 16 echoed messages.

Rust

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

let ws = chilkat::WebSocket::new();

// For brevity, this example does not check for errors when etablishing the WebSocket connection.
// See Establish WebSocket Connection for more complete sample code for making the connection.

let rest = chilkat::Rest::new();
// Connect to websockets.chilkat.io
// IMPORTANT: websockets.chilkat.io accepts frames of up to 16K in size and echoes them back.
// IMPORTANT: The websockets.chilkat.io server imposes the following limitations: 
// ---------- Messages must be 16K or less, and each connection is limited to a max of 16 echoed messages.
let _ = rest.connect("websockets.chilkat.io", 80, false, false).is_ok();
let _ = ws.use_connection(&rest);
let _ = ws.add_client_headers();
let response_body_ignored = rest.full_request_no_body("GET", "/wsChilkatEcho.ashx").unwrap_or_default();
if ws.validate_server_handshake().is_err() {
    println!("{}", ws.last_error_text());
    return;
}

// This example demonstrates sending a frame and receiving a text frame.

// Send a frame containing the string "Hello World!"
// This will be the first and final frame, and therefore this constitutes the entire message.
let final_frame = true;
if ws.send_frame("Hello World!", final_frame).is_err() {
    println!("{}", ws.last_error_text());
    return;
}

// Read an incoming frame.
if ws.read_frame().is_err() {
    println!("Failed to receive a frame");
    println!("ReadFrame fail reason = {}", ws.read_frame_fail_reason());
    println!("{}", ws.last_error_text());
    return;
}

// Show the string that was received.
let received_str = ws.get_frame_data().unwrap_or_default();
println!("Received: {}", received_str);

// Close the websocket connection.
if ws.send_close(true, 1000, "Closing this websocket.").is_err() {
    println!("{}", ws.last_error_text());
    return;
}

// Read the Close response.
if ws.read_frame().is_err() {
    println!("ReadFrame fail reason = {}", ws.read_frame_fail_reason());
    println!("{}", ws.last_error_text());
    return;
}

// Should receive the "Close" opcode.
println!("Received opcode: {}", ws.frame_opcode());
// Should be the same status code we sent (1000)
println!("Received close status code: {}", ws.close_status_code());
// The server may echo the close reason.  If not, this will be empty.
println!("Echoed close reason: {}", ws.close_reason());

println!("Success.");