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(Unicode C) Duplicate Python websocketsSee more WebSocket ExamplesDemonstrates 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()
#include <C_CkRestW.h> #include <C_CkWebSocketW.h> void ChilkatSample(void) { HCkRestW rest; BOOL success; HCkWebSocketW ws; const wchar_t *responseBody; int statusCode; BOOL finalFrame; const wchar_t *receivedStr; // 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); } |
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