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weston committed Mar 8, 2024
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22 changes: 22 additions & 0 deletions .gitignore
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# Python
*.pyc
__pycache__/
*.pyo
*.pyd
*.pyw
*.pyz
*.pyzw
*.pyc
*.pyo
*.pyd
*.pyw
*.pyz
*.pyzw
*.egg-info/
*.egg
*.whl

# Web
node_modules/
yarn.lock
yarn-error.log
21 changes: 21 additions & 0 deletions LICENSE
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MIT License

Copyright (c) 2024 weston wei

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
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220 changes: 220 additions & 0 deletions app.py
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#!/usr/bin/env python
# -*- coding: utf-8 -*-

# app.py
import os
import time
from bottle import abort, route, run, request,Bottle, response, static_file, template
# import pymysql.cursors
import json
from datetime import datetime, timedelta
import subprocess
app = Bottle()


#
handlers = {}


PORT = 9000

isPrivate = False

@app.route("/video")
def get_video():
# Return limit exceeded if 4 applications are already open
appid = -1
for key in handlers.keys():
if(handlers[key].getClientCount()==0):
appid = key
break

if(appid == -1):
for i in range(1,5):
if(i not in handlers.keys()):
appid = i
break
if(appid == -1):
return "Connection limit exceeded, only a maximum of 4 connections can be made simultaneously"

# Launch the Unity executable file
unity_exe_path = 'E:/Projects/SteamingTest/Build/Window/SteamingTest.exe' # Replace with the path to your Unity executable file
unity_args = ["-appid",str(appid)]
subprocess.Popen([unity_exe_path] + unity_args)
# appid = 1

context = {
'appid': appid
}
html = template('receiver/index.html', **context)
return html

@app.route('/static/<filepath:path>')
def serve_static(filepath):
current_dir = os.path.dirname(os.path.abspath(__file__))
static_folder = os.path.join(current_dir, 'static')
return static_file(filepath, root=static_folder)

@app.route('/config')
def server_config():
data ={"useWebSocket":True,"startupMode":"public","logging":"dev"}
json_data = json.dumps(data)
return json_data



@app.route('/<appid:int>')
def handle_websocket(appid):
wsock = request.environ.get('wsgi.websocket')
if not wsock:
html = template('index/index.html')
return html
# Handle the connection establishment event
handler = getOrCreateHandler(appid)
handler.addClient(wsock)
print("WebSocket connected")
while True:
try:
message = wsock.receive()
print(message)
if(message==None):
break
else:
msg = json.loads(message)
msg_type = msg["type"]

if msg_type == "connect":
handler.onConnect(wsock, msg["connectionId"])
elif msg_type == "disconnect":
handler.onDisconnect(wsock, msg["connectionId"])
elif msg_type == "offer":
handler.onOffer(wsock, msg["data"])
elif msg_type == "answer":
handler.onAnswer(wsock, msg["data"])
elif msg_type == "candidate":
handler.onCandidate(wsock, msg["data"])
else:
pass
except WebSocketError:
break

# Handle the connection closure event
handler.removeClient(wsock)
print("WebSocket disconnected")

def getOrCreateHandler(key):
if key in handlers:
return handlers[key]
else:
handlers[key] = Handler()
return handlers[key]

class Handler:
def __init__(self):
# [{sessonId:[connectionId,...]}]
self.clients = {}
# [{connectionId:[sessionId1, sessionId2]}]
self.connectionPair = {}

def onConnect(self, ws, connectionId):
polite = True
if isPrivate:
if connectionId in self.connectionPair:
pair = self.connectionPair[connectionId]
if pair[0] is not None and pair[1] is not None:
ws.send(json.dumps({ "type": "error", "message": f"{connectionId}: This connection id is already used." }))
return
elif pair[0] is not None:
self.connectionPair[connectionId] = [pair[0], ws]
else:
self.connectionPair[connectionId] = [ws, None]
polite = False
connectionIds = self.getOrCreateConnectionIds(ws)
connectionIds.add(connectionId)
data = { "type": "connect", "connectionId": connectionId, "polite": polite}
ws.send(json.dumps(data))

def onDisconnect(self, ws, connectionId):
connectionIds = self.clients[ws]
connectionIds.remove(connectionId)
data = { "type": "disconnect", "connectionId": connectionId }
if connectionId in self.connectionPair:
pair = self.connectionPair[connectionId]
otherSessionWs = pair[0] if pair[0] != ws else pair[1]
if otherSessionWs:
otherSessionWs.send(json.dumps(data))
del self.connectionPair[connectionId]
ws.send(json.dumps(data))

def onOffer(self, ws,message):
connectionId = message["connectionId"]
time_now = int(time.time() * 1000)
newOffer = {"sdp":message["sdp"],"datetime":time_now,"polite":False}
sendData = { "from": connectionId, "to": "", "type": "offer", "data": newOffer }

if isPrivate:
if connectionId in self.connectionPair:
pair = self.connectionPair[connectionId]
otherSessionWs = pair[0] if pair[0] != ws else pair[1]
if otherSessionWs:
newOffer["polite"] = True
otherSessionWs.send(json.dumps(sendData))
else:
self.connectionPair[connectionId] = [ws, None]
for k in self.clients.keys():
if k != ws:
k.send(json.dumps(sendData))

def onAnswer(self, ws,message):
connectionId = message["connectionId"]
time_now = int(time.time() * 1000)
newAnswer = {"sdp":message["sdp"],"datetime":time_now}
sendData = { "from": connectionId, "to": "", "type": "answer", "data": newAnswer }
if connectionId in self.connectionPair:
pair = self.connectionPair[connectionId]
otherSessionWs = pair[0] if pair[0] != ws else pair[1]
if not isPrivate:
self.connectionPair[connectionId] = [otherSessionWs, ws]
otherSessionWs.send(json.dumps(sendData))

def onCandidate(self, ws,message):
connectionId = message["connectionId"]
time_now = int(time.time() * 1000)
candidate = {"candidate":message["candidate"], "sdpMLineIndex":message["sdpMLineIndex"], "sdpMid":message["sdpMid"], "datetime":time_now}
sendData = { "from": connectionId, "to": "", "type": "candidate", "data": candidate }
if isPrivate:
if connectionId in self.connectionPair:
pair = self.connectionPair[connectionId]
otherSessionWs = pair[0] if pair[0] != ws else pair[1]
if otherSessionWs:
otherSessionWs.send(json.dumps(sendData))
else:
for k in self.clients.keys():
if k != ws:
k.send(json.dumps(sendData))

def getOrCreateConnectionIds(self, ws):
if ws in self.clients:
return self.clients[ws]
else:
self.clients[ws] = set()
return self.clients[ws]
def addClient(self,ws):
self.clients[ws] = set()

def removeClient(self,ws):
self.clients.pop(ws)
#Send a message to the Unity executable to invoke Application.Quit()
sendData = {"type": "killApp"}
for session in self.clients.keys():
session.send(json.dumps(sendData))

def getClientCount(self):
return len(self.clients)

from gevent.pywsgi import WSGIServer
from geventwebsocket import WebSocketError
from geventwebsocket.handler import WebSocketHandler
server = WSGIServer(('127.0.0.1', PORT), app,
handler_class=WebSocketHandler)
server.serve_forever()
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