python3 - 基于 gevent 模块，实现服务端单线程下多协程，套接字并发通信

服务端

from gevent import monkey;monkey.patch_all()
import socket
import struct, json
from gevent import spawn


def task(conn, c_add):
    '''
    在子线程内，实现对应客户端等待输入和数据处理
    :param conn:
    :return:
    '''
    while True:
        try:
            b_header = conn.recv(struct.unpack('i', conn.recv(4))[0])
            header = json.loads(b_header.decode('utf-8'))
            user = header['user']
            msg = header['msg']
            print('%s %s : %s' % (c_add, user, msg))
        except ConnectionResetError:
            break
        except struct.error:
            break


def server(IP, PORT, BACKLOG=4):
    ADD = (IP, PORT)
    server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    server.bind(ADD)
    server.listen(BACKLOG)
    # 等待建立链接，并且进行通信
    while True:
        conn, c_add = server.accept()
        # 异步提交连接，执行task
        spawn(task, conn, c_add)


if __name__ == '__main__':
    # 异步提交
    g1 = spawn(server, '127.0.0.1', 8080,)
    # 主进程等待协程执行结束
    g1.join()

---

客户端

import socket, struct, json
from threading import Thread,current_thread


def client(IP, PORT):
    S_ADD = (IP, PORT)

    client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    client.connect(S_ADD)

    while True:
        msg = 'hello，world'
        if msg == 'q':
            break
        header = {
            'user': current_thread().name,
            'msg': msg
        }
        j_header = json.dumps(header)
        b_header = j_header.encode('utf-8')
        s_header = struct.pack('i', len(b_header))

        client.send(s_header)
        client.send(b_header)


if __name__ == '__main__':
    # 开启线程同时访问服务端，模拟测压
    for i in range(100):
        t = Thread(target=client, args=('127.0.0.1', 8080,))
        t.start()

---

执行结果

………………

('127.0.0.1', 59383) Thread-3 : hello，world
('127.0.0.1', 59383) Thread-3 : hello，world
('127.0.0.1', 59383) Thread-3 : hello，world
('127.0.0.1', 59378) Thread-7 : hello，world
('127.0.0.1', 59378) Thread-7 : hello，world
('127.0.0.1', 59380) Thread-6 : hello，world
('127.0.0.1', 59380) Thread-6 : hello，world
('127.0.0.1', 59380) Thread-6 : hello，world
('127.0.0.1', 59380) Thread-6 : hello，world
('127.0.0.1', 59380) Thread-6 : hello，world
('127.0.0.1', 59387) Thread-11 : hello，world
('127.0.0.1', 59387) Thread-11 : hello，world
('127.0.0.1', 59383) Thread-3 : hello，world
('127.0.0.1', 59383) Thread-3 : hello，world
('127.0.0.1', 59383) Thread-3 : hello，world
('127.0.0.1', 59383) Thread-3 : hello，world
('127.0.0.1', 59383) Thread-3 : hello，world
('127.0.0.1', 59383) Thread-3 : hello，world
('127.0.0.1', 59380) Thread-6 : hello，world
('127.0.0.1', 59380) Thread-6 : hello，world
('127.0.0.1', 59380) Thread-6 : hello，world
('127.0.0.1', 59383) Thread-3 : hello，world
('127.0.0.1', 59383) Thread-3 : hello，world
('127.0.0.1', 59383) Thread-3 : hello，world
('127.0.0.1', 59380) Thread-6 : hello，world
('127.0.0.1', 59380) Thread-6 : hello，world
('127.0.0.1', 59387) Thread-11 : hello，world
('127.0.0.1', 59387) Thread-11 : hello，world
('127.0.0.1', 59387) Thread-11 : hello，world
('127.0.0.1', 59387) Thread-11 : hello，world
('127.0.0.1', 59383) Thread-3 : hello，world
('127.0.0.1', 59383) Thread-3 : hello，world
('127.0.0.1', 59387) Thread-11 : hello，world
('127.0.0.1', 59387) Thread-11 : hello，world
('127.0.0.1', 59383) Thread-3 : hello，world
('127.0.0.1', 59387) Thread-11 : hello，world
('127.0.0.1', 59383) Thread-3 : hello，world
('127.0.0.1', 59383) Thread-3 : hello，world
('127.0.0.1', 59383) Thread-3 : hello，world
('127.0.0.1', 59387) Thread-11 : hello，world
('127.0.0.1', 59387) Thread-11 : hello，world
('127.0.0.1', 59383) Thread-3 : hello，world
('127.0.0.1', 59387) Thread-11 : hello，world
('127.0.0.1', 59387) Thread-11 : hello，world
………………