Python 简单web服务器的实现

import re
import socket

def service_cilent(new_socket):
    request = new_socket.recv(1024).decode("utf-8")
    # Python splitlines() 按照行('\r', '\r\n', \n')分隔，返回一个包含各行作为元素的列表，如果参数 keepends 为 False，不包含换行符，如果为 True，则保留换行符。
    request_lines = request.splitlines()
    print(request_lines)
    file_name = ""
    ret = re.match(r"[^/]+(/[^ ]*)", request_lines[0])
    if ret:
        file_name = ret.group(1)
        if file_name == "/":
            file_name = "index.html"
    try:
        f = open(file_name, "rb")
    except:
        response = "HTTP/1.1 404 NOT FOUND\r\n\r\n"
        response += "------file not found-----"
        new_socket.send(response.encode("utf-8"))
    else:
        # 打开文件成功就读文件 然后关闭文件指针
        html_content = f.read()
        f.close()
        # 准备发送给浏览器的数据---header
        response = "HTTP/1.1 200 OK\r\n\r\n"
        # 将response header发送给浏览器
        new_socket.send(response.encode("utf-8"))
        # 将response body发送给浏览器
        new_socket.send(html_content)
    # 关闭套接字
    new_socket.close()

def main():
    # 创建套接字
    tcp_server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    # tcp_server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
    # 绑定
    tcp_server_socket.bind(("", 7089))
    # 监听套接字
    tcp_server_socket.listen(128)
    while True:
        new_socket, cilent_addr = tcp_server_socket.accept()
        service_cilent(new_socket)
    # 关闭监听套接字
    tcp_server_socket.close()

if __name__ == '__main__':
    main()