第一篇 先用socket模拟web服务器

一、用socket来模拟网站访问

socket为python2.7
#!/usr/bin/env python
# -*- coding:utf-8 -*-

import socket

def handle_request(client):
    buf = client.recv(1024)
    client.send("HTTP/1.1 200 OK\r\n\r\n")
    f = open("demo.html", "r")
    data = f.read()
    f.close()
    client.send(data)

def main():
    ss = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    ss.bind(("127.0.0.1", 8003))
    ss.listen(5)

    while True:
        connection, address = ss.accept()
        handle_request(connection)
        connection.close()
if __name__ == '__main__':
    main()

socket

#!/usr/bin/env python
# -*- coding:utf-8 -*-
import socket

def handle_request(client):
    client.sendall(bytes("HTTP/1.1 200 OK \r\n\r\n", encoding="utf-8"))
    buf = str(client.recv(1024),encoding="utf-8")
    # f = open("demo.html", "r")
    # data = f.read()
    # f.close()
    data='<h1>666</h1>'
    client.sendall(bytes(str(data),encoding="utf-8"))
def main():
    ss = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    ss.bind(("127.0.0.1", 8003))
    ss.listen(5)
    while True:
        connection, address = ss.accept()
        handle_request(connection)
        connection.close()
if __name__ == '__main__':
    main()

python3

上面就是模拟用户访问socket之后返回给用户的信息，这份信息是字符串，来源于demo.html

程序员修改网页信息只需要写好页面添加进服务器就可以

其中nginx和apache服务就是这样的原理