python的socket编程入门

#!/usr/bin/env python
# -*- coding:utf-8 -*-
import socket
from exts import Request
from route import response_for_request
from datetime import datetime
def run_server(host='', port=1207):
  # 建立一个socket.socket()类s
  with socket.socket() as s:
    # 设置s在服务端关闭后马上释放端口，避免Address already in use错误
    s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
    # 绑定host和port
    s.bind((host, port))
    while 1:
      # 开始监听传入连接，可以挂起的最大连接数为5
      s.listen(5)
      # 接受连接，根据buffer_size不断读取内容
      connection, address = s.accept()
      r = ''
      buffer_size = 1024
      while 1:
        data = connection.recv(1024).decode('utf-8')
        r += data
        if len(data) < buffer_size:
          break
      # 防止浏览器传空请求过来
      if len(r.split()) < 2:
        continue
      # 最后取得的r是一个http请求头字符串，对其解析，然后使用sendall返回相应的内容 
      request = Request(r)
      # 每次请求时打印时间，请求的方法和路径
      print(str(datetime.now())[:19], request.method, request.path)
      response = response_for_request(request)
      connection.sendall(response)
      connection.close()
if __name__ == '__main__':
  run_server()