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#

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.
Chilkat.Rest rest = new Chilkat.Rest();
success = rest.Connect("192.168.1.35",80,false,false);
if (success != true) {
    Debug.WriteLine(rest.LastErrorText);
    return;
}

Chilkat.WebSocket ws = new Chilkat.WebSocket();

//  Tell the WebSocket to use this connection.
success = ws.UseConnection(rest);
if (success != true) {
    Debug.WriteLine(ws.LastErrorText);
    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.
string responseBody = rest.FullRequestNoBody("GET","/websockets");
if (rest.LastMethodSuccess != true) {
    Debug.WriteLine(rest.LastErrorText);
    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.ResponseStatusCode;
Debug.WriteLine("Response status code: " + Convert.ToString(statusCode));

if (statusCode != 101) {
    Debug.WriteLine(responseBody);
    Debug.WriteLine("-- Failed because of unexpected response status code.");
    return;
}

//  We have the expected 101 response, so let's now validate the 
//  contents of the response.
success = ws.ValidateServerHandshake();
if (success != true) {
    Debug.WriteLine(ws.LastErrorText);
    return;
}

Debug.WriteLine("WebSocket connection successful.");

//  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) {
    Debug.WriteLine(ws.LastErrorText);
    return;
}

//  Read an incoming frame.
success = ws.ReadFrame();
if (success != true) {
    Debug.WriteLine("Failed to receive a frame");
    Debug.WriteLine("ReadFrame fail reason = " + Convert.ToString(ws.ReadFrameFailReason));
    Debug.WriteLine(ws.LastErrorText);
    return;
}

//  Show the string that was received.
string receivedStr = ws.GetFrameData();
Debug.WriteLine("Received: " + receivedStr);

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