Java

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()

Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.Rest;
import com.chilkatsoft.chilkat2.WebSocket;

public class ChilkatExample {

    public static void main(String[] args) {
        // 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 rest = new Rest();
        try {
            rest.connect("192.168.1.35", 80, false, false);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        WebSocket ws = new WebSocket();

        // Tell the WebSocket to use this connection.
        String responseBody;
        try {
            ws.useConnection(rest);

            // 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.
            responseBody = rest.fullRequestNoBody("GET", "/websockets");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            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.getResponseStatusCode();
        System.out.println("Response status code: " + statusCode);

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

        // We have the expected 101 response, so let's now validate the
        // contents of the response.
        try {
            ws.validateServerHandshake();
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        System.out.println("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.
        boolean finalFrame = true;
        try {
            ws.sendFrame("http.controller_login:username=xxx&password=xxxxx", finalFrame);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // Read an incoming frame.
        try {
            ws.readFrame();
        } catch (ChilkatException e) {
            System.out.println("Failed to receive a frame");
            System.out.println("ReadFrame fail reason = " + ws.getReadFrameFailReason());
            System.out.println(e.getLastErrorText());
            return;
        }

        // Show the string that was received.
        String receivedStr = ws.getFrameData();
        System.out.println("Received: " + receivedStr);

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