# -*- coding: utf-8 -*-

 # @Time : 2019-07-17 1:39

 # @File : 网络socket实现http服务器.py

 # @Software: PyCharm

 import socket

 import re

 def server_conn(conn,file_name):

     # 1.响应头部

     if file_name == '/index.html':

         # 可换成HTML本地文件

         response = "HTTP/1.1 200 OK \r\n"

         # 2.响应body

         response += "\r\n"

         response += "<h1> index </h1>"

         # 3.发送请求

         conn.sendall(bytes(response, encoding="utf-8"))

     else:

         response = "HTTP/1.1 404 OK \r\n"

         # 2.响应body

         response += "\r\n"

         response += "<h1> pages not found </h1>"

         # 3.发送请求

         conn.sendall(bytes(response, encoding="utf-8"))

     pass

 def main(host, port):

     # 1.创建套接字

     server = socket.socket(socket.AF_INET,socket.SOCK_STREAM)

     server.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1)

     # 2.绑定

     server.bind((host, port))

     # 3.监听

     server.listen(128)

     # 4.连接

     while True:

         conn, address = server.accept()

         # 接收客户端消息，最大字节数1024

         client_mess = conn.recv(1024)

         # 接收浏览器返回数据

         client_content = str(client_mess, encoding="utf-8").splitlines()

         # 切割匹配访问路径

         file_name = re.match(r"[^/]+(/[^ ]*)",client_content[0])

         if file_name:

             file_name1 = file_name.group(1)

             if file_name1 == "/":

                 file_name1 = "/index.html"

             print(file_name1)

         # print(client_content)

         server_conn(conn,file_name1)

         conn.close()

     pass

 if __name__ == "__main__":

     main("127.0.0.1", 7890)

 # 注 ： http协议，三次握手，四次挥手