C++

Duplicate Python websockets

See more WebSocket Examples

Demonstrates how to duplicate the following Python client-side websocket snippet:

async with websockets.connect('ws://192.168.1.35/websocket') as websocket:
await websocket.send("http.controller_login:username=xxx&password=xxxxx")
response = await websocket.recv()

C++

#include <CkRest.h>
#include <CkWebSocket.h>

void ChilkatSample(void)
    {
    bool success = false;

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

    // In Python, the following line of code does more than just connect:
    // 
    //      websockets.connect('ws://192.168.1.35/websocket')
    // 
    // It is connecting to 192.168.1.35 without using TLS.  If the URI starts with "wss://", then TLS should be used.
    // But this URI begins with just "ws:/", so no TLS.

    // Also, after connecting, a GET request is sent to the /websocket endpoint.
    // In summary, the websockets.connect function is establishing the connection and it sends a GET request.

    // First establish the connection.
    // No TLS, use the default HTTP port 80.
    CkRest rest;
    success = rest.Connect("192.168.1.35",80,false,false);
    if (success != true) {
        std::cout << rest.lastErrorText() << "\r\n";
        return;
    }

    CkWebSocket ws;

    // Tell the WebSocket to use this connection.
    success = ws.UseConnection(rest);
    if (success != true) {
        std::cout << ws.lastErrorText() << "\r\n";
        return;
    }

    // Add the standard WebSocket open handshake headers that will be needed.
    // (This adds the required HTTP request headers to the rest object.)
    ws.AddClientHeaders();

    // Now send the GET request to /websockets.
    const char *responseBody = rest.fullRequestNoBody("GET","/websockets");
    if (rest.get_LastMethodSuccess() != true) {
        std::cout << rest.lastErrorText() << "\r\n";
        return;
    }

    // If successful, the HTTP response status code should be 101,
    // and the response body will be empty. (If it failed, we'll have a look
    // at the response body..)
    int statusCode = rest.get_ResponseStatusCode();
    std::cout << "Response status code: " << statusCode << "\r\n";

    if (statusCode != 101) {
        std::cout << responseBody << "\r\n";
        std::cout << "-- Failed because of unexpected response status code." << "\r\n";
        return;
    }

    // We have the expected 101 response, so let's now validate the 
    // contents of the response.
    success = ws.ValidateServerHandshake();
    if (success != true) {
        std::cout << ws.lastErrorText() << "\r\n";
        return;
    }

    std::cout << "WebSocket connection successful." << "\r\n";

    // The application may now begin sending and receiving frames on the WebSocket connection.

    // The 1st frame sent by the Python snippet is:
    // 
    //     websocket.send("http.controller_login:username=xxx&password=xxxxx")
    // 

    // Send the same using Chilkat, and get the response.
    bool finalFrame = true;
    success = ws.SendFrame("http.controller_login:username=xxx&password=xxxxx",finalFrame);
    if (success != true) {
        std::cout << ws.lastErrorText() << "\r\n";
        return;
    }

    // Read an incoming frame.
    success = ws.ReadFrame();
    if (success != true) {
        std::cout << "Failed to receive a frame" << "\r\n";
        std::cout << "ReadFrame fail reason = " << ws.get_ReadFrameFailReason() << "\r\n";
        std::cout << ws.lastErrorText() << "\r\n";
        return;
    }

    // Show the string that was received.
    const char *receivedStr = ws.getFrameData();
    std::cout << "Received: " << receivedStr << "\r\n";

    // Continue with whatever additional communications are desired...
    // ....
    // 
    }