1.分析

当socket去监听的时候，是堵塞的状态
通过tcp_sever_socket.setblocking(False)去设置不堵塞
当socket发现没有用户的时候会出错，执行异常
当连接上用户的时候会马上把用户发到socket列表中
再遍历socket列表时候也设置，new的socket为非阻塞状态
通过和上面一样的方式

2.代码

import socket
import re


def http_sever(new_socket, recv_data):
    recv_data_list = recv_data.splitlines()
    ret = re.match(r"[^/]+(/[^ ]*)", recv_data_list[0])

    file_name = ""
    if ret:
        file_name = ret.group(1)
        if file_name == "/":
            file_name = "/index.html"

    http_header = ""
    http_body = ""

    try:
        f = open("./html" + file_name, "rb")
    except:
        http_body = "<h1>Sorry not found</h1>".encode("utf-8")
        http_header = "HTTP/1.1 404 NOT FOUND
"
        http_header += "Content-Length:%d

" % len(http_body)
    else:
        http_body = f.read()
        f.close()
        http_header = "HTTP/1.1 200 OK
"
        http_header += "Content-Length:%d

" % len(http_body)

    new_socket.send(http_header.encode("utf-8"))
    new_socket.send(http_body)

def main():
    tcp_sever_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    tcp_sever_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
    tcp_sever_socket.bind(("", 7890))
    tcp_sever_socket.listen(128)
    # 设置非堵塞
    tcp_sever_socket.setblocking(False)
    client_lists = list()
    while True:
        try:
            new_socket, new_add = tcp_sever_socket.accept()
        except Exception as ret:
            pass
        else:
            # 设置非堵塞
            new_socket.setblocking(False)
            client_lists.append(new_socket)

        for client_socket in client_lists:
            try:
                # 尝试接收数据
                recv_data = client_socket.recv(1024).decode("utf-8")
            except Exception as f:
                # 如果没有数据
                pass
            else:
                # 如果有数据有两种情况，1，客户端发来了数据，2客服端下线
                if recv_data:
                    http_sever(client_socket, recv_data)
                else:
                    client_socket.close()
                    client_lists.remove(client_socket)

    tcp_sever_socket.close()


if __name__ == '__main__':
    main()

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