Unicode 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()

Unicode C

#include <C_CkRestW.h>
#include <C_CkWebSocketW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkRestW rest;
    HCkWebSocketW ws;
    const wchar_t *responseBody;
    int statusCode;
    BOOL finalFrame;
    const wchar_t *receivedStr;

    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.
    rest = CkRestW_Create();
    success = CkRestW_Connect(rest,L"192.168.1.35",80,FALSE,FALSE);
    if (success != TRUE) {
        wprintf(L"%s\n",CkRestW_lastErrorText(rest));
        CkRestW_Dispose(rest);
        return;
    }

    ws = CkWebSocketW_Create();

    // Tell the WebSocket to use this connection.
    success = CkWebSocketW_UseConnection(ws,rest);
    if (success != TRUE) {
        wprintf(L"%s\n",CkWebSocketW_lastErrorText(ws));
        CkRestW_Dispose(rest);
        CkWebSocketW_Dispose(ws);
        return;
    }

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

    // Now send the GET request to /websockets.
    responseBody = CkRestW_fullRequestNoBody(rest,L"GET",L"/websockets");
    if (CkRestW_getLastMethodSuccess(rest) != TRUE) {
        wprintf(L"%s\n",CkRestW_lastErrorText(rest));
        CkRestW_Dispose(rest);
        CkWebSocketW_Dispose(ws);
        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..)
    statusCode = CkRestW_getResponseStatusCode(rest);
    wprintf(L"Response status code: %d\n",statusCode);

    if (statusCode != 101) {
        wprintf(L"%s\n",responseBody);
        wprintf(L"-- Failed because of unexpected response status code.\n");
        CkRestW_Dispose(rest);
        CkWebSocketW_Dispose(ws);
        return;
    }

    // We have the expected 101 response, so let's now validate the 
    // contents of the response.
    success = CkWebSocketW_ValidateServerHandshake(ws);
    if (success != TRUE) {
        wprintf(L"%s\n",CkWebSocketW_lastErrorText(ws));
        CkRestW_Dispose(rest);
        CkWebSocketW_Dispose(ws);
        return;
    }

    wprintf(L"WebSocket connection successful.\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.
    finalFrame = TRUE;
    success = CkWebSocketW_SendFrame(ws,L"http.controller_login:username=xxx&password=xxxxx",finalFrame);
    if (success != TRUE) {
        wprintf(L"%s\n",CkWebSocketW_lastErrorText(ws));
        CkRestW_Dispose(rest);
        CkWebSocketW_Dispose(ws);
        return;
    }

    // Read an incoming frame.
    success = CkWebSocketW_ReadFrame(ws);
    if (success != TRUE) {
        wprintf(L"Failed to receive a frame\n");
        wprintf(L"ReadFrame fail reason = %d\n",CkWebSocketW_getReadFrameFailReason(ws));
        wprintf(L"%s\n",CkWebSocketW_lastErrorText(ws));
        CkRestW_Dispose(rest);
        CkWebSocketW_Dispose(ws);
        return;
    }

    // Show the string that was received.
    receivedStr = CkWebSocketW_getFrameData(ws);
    wprintf(L"Received: %s\n",receivedStr);

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


    CkRestW_Dispose(rest);
    CkWebSocketW_Dispose(ws);

    }