python实现静态web服务器

GET /path HTTP/1.1
 Header1: Value1
 Header2: Value2
 Header3: Value3

POST /path HTTP/1.1
 Header1: Value1
 Header2: Value2
 Header3: Value3

 body data goes here...

200 OK
 Header1: Value1
 Header2: Value2
 Header3: Value3

 body data goes here...

import socket
import re
import time


def service_client(new_socket):
 """为这个客户端服务"""

 # 1.接收浏览器发送过来的请求，即ｈｔｔｐ请求
 # GET / HTTP/1.1
 # --------
 request = new_socket.recv(1024).decode('utf-8')

 # 判断客户端意外断开链接返回空字符串
 if not request:
  # 关闭套接字并退出
  new_socket.close()
  print("==="*30)
  return

 # 分隔套接字
 request_lines = request.splitlines()
 print()
 print(">"*20)
 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"

 # 2.返回http格式数据　给浏览器
 try:
  f = open("./html" + file_name, "rb")
 except:
  response = "HTTP/1.1 404 NOT FOUND\r\n"
  response += "Content-Type:text/html;charset=utf-8\r\n"
  response += "\r\n"
  response += "<h1>404 not found <br> 没有发现所请求资源</h1>"
  response += str(time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(time.time())))
  new_socket.send(response.encode('utf-8'))
 else:
  html_content = f.read()
  f.close()
  # 2.1准备发送给浏览器的数据---header
  response = "HTTP/1.1 200 OK\r\n"
  response += "\r\n"
  # 2.2准备发送给浏览器的数据 ---body
  # 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():
 """用来完成整体的控制"""
 # 1.创建套接字
 tcp_server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
 # 端口复用
 tcp_server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
 # 2.绑定
 tcp_server_socket.bind(("", 7890))
 # 3.变为套接字
 tcp_server_socket.listen(128)

 while True:
  # 4.等待客户端的链接
  new_socket, client_addr = tcp_server_socket.accept()

  print(client_addr)

  # 5.为这个客户端服务
  service_client(new_socket)

 # 关闭监听套接字
 tcp_server_socket.close()


if __name__ == '__main__':
 main()