socket 簡單實現HTTP服務器

# -*- coding: utf-8 -*-
# @Time : 2019-07-17 1:39
# @File : 網絡socket實現http服務器.py
# @Software: PyCharm

import socket
import re


def server_conn(conn,file_name):
    # 1.響應頭部
    if file_name == '/index.html':
        # 可換成HTML本地文件
        response = "HTTP/1.1 200 OK \r\n"
        # 2.響應body
        response += "\r\n"
        response += "<h1> index </h1>"
        # 3.發送請求
        conn.sendall(bytes(response, encoding="utf-8"))
    else:
        response = "HTTP/1.1 404 OK \r\n"
        # 2.響應body
        response += "\r\n"
        response += "<h1> pages not found </h1>"
        # 3.發送請求
        conn.sendall(bytes(response, encoding="utf-8"))
    pass


def main(host, port):
    # 1.創建套接字
    server = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
    server.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1)
    # 2.綁定
    server.bind((host, port))
    # 3.監聽
    server.listen(128)
    # 4.連接
    while True:
        conn, address = server.accept()
        # 接收客戶端消息，最大字節數1024
        client_mess = conn.recv(1024)
        # 接收瀏覽器返回數據
        client_content = str(client_mess, encoding="utf-8").splitlines()
        # 切割匹配訪問路徑
        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協議，三次握手，四次揮手