摘要：簡單實現參考此文章只限于版本大于前期準備端這里會在開始連接時就調用這里會挺住等待發(fā)送消息先執(zhí)行這里在這里停住等待二加密實現這里應該是要填寫加密的文件此處沒有深入研究三服務器和瀏覽器的實現此處先執(zhí)行代碼然后再打開瀏覽器就可以看到過程同步例子

參考:https://websockets.readthedoc...
PS:此文章只限于python版本大于3.6

前期準備

pip install websocket

server端

import asyncio
import websockets

async def hello(websocket, path):
    print(path)                    #這里會在client開始連接時就調用
    name = await websocket.recv()       #這里會挺住,等待client發(fā)送消息
    print(f"< {name}")

    greeting = f"Hello {name}!"

    await websocket.send(greeting)
    print(f"> {greeting}")

start_server = websockets.serve(hello, "localhost", 8765)

asyncio.get_event_loop().run_until_complete(start_server)   #先執(zhí)行這里
asyncio.get_event_loop().run_forever()                      #在這里停住,等待

client

import asyncio
import websockets

async def hello():
    async with websockets.connect(
            "ws://localhost:8765") as websocket:
        name = input("What"s your name? ")

        await websocket.send(name)
        print(f"> {name}")

        greeting = await websocket.recv()
        print(f"< {greeting}")

asyncio.get_event_loop().run_until_complete(hello())  

server

import asyncio
import pathlib
import ssl
import websockets

async def hello(websocket, path):
    name = await websocket.recv()
    print(f"< {name}")

    greeting = f"Hello {name}!"

    await websocket.send(greeting)
    print(f"> {greeting}")

ssl_context = ssl.SSLContext(ssl.PROTOCOL_TLS_SERVER)
ssl_context.load_cert_chain(
    pathlib.Path(__file__).with_name("localhost.pem"))  #這里應該是要填寫加密的文件,此處沒有深入研究

start_server = websockets.serve(
    hello, "localhost", 8765, ssl=ssl_context)

asyncio.get_event_loop().run_until_complete(start_server)
asyncio.get_event_loop().run_forever()

client

import asyncio
import pathlib
import ssl
import websockets

ssl_context = ssl.SSLContext(ssl.PROTOCOL_TLS_CLIENT)
ssl_context.load_verify_locations(
    pathlib.Path(__file__).with_name("localhost.pem"))

async def hello():
    async with websockets.connect(
            "wss://localhost:8765", ssl=ssl_context) as websocket:
        name = input("What"s your name? ")

        await websocket.send(name)
        print(f"> {name}")

        greeting = await websocket.recv()
        print(f"< {greeting}")

asyncio.get_event_loop().run_until_complete(hello())

server

import asyncio
import datetime
import random
import websockets

async def time(websocket, path):
    while True:
        now = datetime.datetime.utcnow().isoformat() + "Z"
        await websocket.send(now)
        await asyncio.sleep(random.random() * 3)

start_server = websockets.serve(time, "127.0.0.1", 5678)

asyncio.get_event_loop().run_until_complete(start_server)
asyncio.get_event_loop().run_forever()

browser

PS:此處先執(zhí)行server代碼,然后再打開瀏覽器就可以看到過程

server

import asyncio
import json
import logging
import websockets

logging.basicConfig()

STATE = {"value": 0}

USERS = set()

def state_event():
    return json.dumps({"type": "state", **STATE})

def users_event():
    return json.dumps({"type": "users", "count": len(USERS)})

async def notify_state():
    if USERS:       # asyncio.wait doesn"t accept an empty list
        message = state_event()
        await asyncio.wait([user.send(message) for user in USERS])

async def notify_users():
    if USERS:       # asyncio.wait doesn"t accept an empty list
        message = users_event()
        await asyncio.wait([user.send(message) for user in USERS])

async def register(websocket):
    USERS.add(websocket)
    await notify_users()

async def unregister(websocket):
    USERS.remove(websocket)
    await notify_users()

async def counter(websocket, path):
    # register(websocket) sends user_event() to websocket
    await register(websocket)
    try:
        await websocket.send(state_event())
        async for message in websocket:
            data = json.loads(message)
            if data["action"] == "minus":
                STATE["value"] -= 1
                await notify_state()
            elif data["action"] == "plus":
                STATE["value"] += 1
                await notify_state()
            else:
                logging.error(
                    "unsupported event: {}", data)
    finally:
        await unregister(websocket)

asyncio.get_event_loop().run_until_complete(
    websockets.serve(counter, "localhost", 6789))
asyncio.get_event_loop().run_forever()

client

    
        
        
    
    
        

            
-
            
?
            
+
        
        

            ? online
        
        
    

websocket提供一個查看當前狀態(tài)的接口
python -m websockets wss://echo.websocket.org/

如果Python版本是3.5以下

server

import asyncio
import websockets

@asyncio.coroutine
def hello(websocket, path):
    name = yield from websocket.recv()
    print("< {}".format(name))

    greeting = "Hello {}!".format(name)

    yield from websocket.send(greeting)
    print("> {}".format(greeting))

start_server = websockets.serve(hello, "localhost", 8765)

asyncio.get_event_loop().run_until_complete(start_server)
asyncio.get_event_loop().run_forever()

client

import asyncio
import websockets

@asyncio.coroutine
def hello():
    websocket = yield from websockets.connect(
        "ws://localhost:8765/")

    try:
        name = input("What"s your name? ")

        yield from websocket.send(name)
        print("> {}".format(name))

        greeting = yield from websocket.recv()
        print("< {}".format(greeting))

    finally:
        yield from websocket.close()

asyncio.get_event_loop().run_until_complete(hello())