Python implements a simple http server (version 1.0, blocking socket.)

simple_http_v1.py

# coding=utf-8
"""
简单的HTTP服务器 V1
    :copyright: (c) 2016 by fangpeng(@beginman.cn).
    :license: MIT, see LICENSE for more details.
"""
import socket

EOL1 = b'\n\n'
EOL2 = b'\n\r\n'
response = b'HTTP/1.1 200 OK\r\nDate: Mon,1 Jan 1996 01:01:01 GMT\r\n'
response += b'Content-Type: text/plain\r\nContent-Length:13\r\n\r\n'
response += b'Hello, world!'

sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
sock.bind(('0.0.0.0', 8000))
sock.listen(1)

try:
    while True:
        # 程序会一直阻塞在这里, 直到建立了一个连接.
        # 这个时候, 服务器socket会建立一个新的socket, 用来和客户端通讯.
        # 这个新的socket是accept()的返回值, address对象标示了客户端的IP地址和端口.
        conn, addr = sock.accept()
        request = b''
        while EOL1 not in request and EOL2 not in request:
            request += conn.recv(1024)
            print('-'*40 + '\n' + request.decode()[:-2])
            conn.send(response)
            conn.close()
finally:
    sock.close()