python编写简单服务器提供静态文件

# coding:utf-8

import socket
import re

from multiprocessing import Process

# 设置静态文件根目录
HTML_ROOT_DIR = "./html"


def handle_client(client_socket):
    """处理客户端请求"""
    # 获取客户端请求数据
    request_data = client_socket.recv(1024)
    print("request data:", request_data)
    request_lines = request_data.splitlines()
    for line in request_lines:
        print(line)

    # 解析请求报文
    # 'GET / HTTP/1.1'
    request_start_line = request_lines[0]
    # 提取用户请求的文件名
    print("*"*10)
    print(request_start_line.decode("utf-8"))
    file_name = re.match(r"\w+ +(/[^ ]*) ", request_start_line.decode("utf-8")).group(1)

    if "/" == file_name:
        file_name = "/index.html"

    # 打开文件，读取内容
    try:
        file = open(HTML_ROOT_DIR + file_name, "rb")
    except IOError:
        response_start_line = "HTTP/1.1 404 Not Found\r\n"
        response_headers = "Server: My server\r\n"
        response_body = "The file is not found!"
    else:
        file_data = file.read()
        file.close()

        # 构造响应数据
        response_start_line = "HTTP/1.1 200 OK\r\n"
        response_headers = "Server: My server\r\n"
        response_body = file_data.decode("utf-8")

    response = response_start_line + response_headers + "\r\n" + response_body
    print("response data:", response)

    # 向客户端返回响应数据
    client_socket.send(bytes(response, "utf-8"))

    # 关闭客户端连接
    client_socket.close()


if __name__ == "__main__":
    server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    """
    socket（）是一个函数，创建一个套接字，
    AF_INET 表示用IPV4地址族，
    SOCK_STREAM 是说是要是用流式套接字
    """
    server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) #设置地址重用
    server_socket.bind(("127.1.1.1", 8000))  #绑定端口
    server_socket.listen(126)   #开启监听

    while True:
        client_socket, client_address = server_socket.accept()
        # print("[%s, %s]用户连接上了" % (client_address[0],client_address[1]))
        print("[%s, %s]用户连接上了" % client_address)
        handle_client_process = Process(target=handle_client, args=(client_socket,))
        """
        tartget表示这个进程到底要执行什么行为
        args是target要接受的参数
        """
        handle_client_process.start()
        client_socket.close()