Best way to make browser interface with FSUIPC?

[joeherwig]

@Paul HentyIs it true that the Websocket Server is only able to register the ports on the hostname if it is started as Admin?
If not started as admin i get the "access denied" message...

[Paul Henty]

Partly true. Certain URLs and Ports are secured by Windows. To use them, the account the application is running under needs permission.

You can achieve this is two ways:

1. By running the application as Admin.

2. By giving the required permission to the current user. This is done using the following command: (You can execute this in the command window or in code using a process):

netsh http add urlacl url=[URL TO REGISTER] user=[DOMAIN]\[USER OR GROUP]

e.g. my PC here is call PJH. My user name is Paul. If I want to use the URL http://PJH:2048/fsuipc I would need this command:

netsh http add urlacl url=http://PJH:2048/fsuipc/ user=PJH\Paul

To run this command you need to be running 'as admin'. But once you've given permissions the socket server will be able to work without admin privileges.

Paul

[Manuel Lence]

Paul just updated my WEBSOCKET. Spectacular! Thanks a lot!!

[ciccio85]

Hello. Any idea on how to achieve a client using python? I tried a simple script but it does not work:

import json
import websocket
from websocket import create_connection

websocket.enableTrace(True)
ws = create_connection("ws://MYIP:8384/fsuipc/")
ws.send(json.dumps({"command":"about.read", "name":"about"}))
result =  ws.recv()
print (result)
ws.close()

If I try that I get this response:

--- request header ---
GET /fsuipc/ HTTP/1.1
Upgrade: websocket
Host: MYIP:8384
Origin: MYIP:8384
Sec-WebSocket-Key: nMbaFYGREah5M2uVaWU/nA==
Sec-WebSocket-Version: 13
Connection: Upgrade


-----------------------
--- response header ---

 

Any suggestion?

Thank you

Francesco

 

Edited January 29, 2023 by ciccio85

[Paul Henty]

I've never used Python so I don't think I can help much.

However, the response you're getting back is from the connection request:

ws = create_connection("ws://MYIP:8384/fsuipc/")

Maybe you need to get that response first, then send your 'about' command and get the response from that:

import json
import websocket
from websocket import create_connection

websocket.enableTrace(True)

ws = create_connection("ws://MYIP:8384/fsuipc/")
result =  ws.recv()
print (result)

ws.send(json.dumps({"command":"about.read", "name":"about"}))
result =  ws.recv()
print (result)

ws.close()

Paul

[ciccio85]

Hello, the trick was to add the fsuipc protocol. Here the working script:

 

import json
import websocket
from websocket import create_connection

websocket.enableTrace(True)

ws = create_connection("ws://MYIP/fsuipc/", subprotocols=["fsuipc"])

ws.send(json.dumps({"command":"about.read", "name":"about"}))
result =  ws.recv()
print (result)

ws.close()

 

Edited January 31, 2023 by ciccio85

[Paul Henty]

Excellent. I'm happy you got it working.

Paul

[ciccio85]

I have a complete working example that can be used to get the data using Python 3:

 

import websocket
import _thread
import json
import time
import rel

def on_message(ws, message):
    print(message)

def on_error(ws, error):
    print(error)

def on_close(ws, close_status_code, close_msg):
    print("### closed ###")

def on_open(ws):
    print("Opened connection")

request = {
       "command": "about.read",
       "name": "about"
}

request2 = {
    "command": "offsets.declare",
    "name": "myOffsets",
    "offsets": [
            {"name": "altitude", "address": 0x0570, "type": "int", "size": 8},
            {"name": "avionicsMaster", "address": 0x2E80, "type": "uint", "size": 4},
            {"name": "heading", "address": 0x0580, "type": "uint", "size": 4},
            {"name": "aircraftName", "address": 0x3D00, "type": "string", "size": 256}
    ]
}

request3 = {
    "command": 'offsets.read',
    "name": "myOffsets",
    "interval": 100
}

if __name__ == "__main__":
    ws = websocket.WebSocketApp("ws://MYIP:PORT/fsuipc/",
                              subprotocols=["fsuipc"],
                              on_open=on_open,
                              on_message=on_message,
                              on_error=on_error,
                              on_close=on_close)

    ws.run_forever(dispatcher=rel, reconnect=5)

    ws.send(json.dumps(request))
    ws.send(json.dumps(request2))
    ws.send(json.dumps(request3))

    rel.signal(2, rel.abort)  # Keyboard Interrupt
    rel.dispatch()