python的Web编程

首先看一下效果

完整代码

import socket
from multiprocessing import Process

HTML_ROOT_DIR = ""


def handle_client(client_socket):
    request_data = client_socket.recv(1024)
    print("request data:", request_data)
    response_start_line = "HTTP/1.0 200 OK\r\n"
    response_headers = "Server: My server\r\n"
    response_body = "hello world"
    response = response_start_line + \
               "\r\n" + response_body
    print("response data:", response)

    client_socket.send(bytes(response, "utf-8"))
    client_socket.close()


if __name__ == "__main__":
    server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    server_socket.bind(("127.0.0.1", 8080))
    server_socket.listen(128)
    while True:
        client_socket, client_address = server_socket.accept()
        handle_client_process = Process(target=handle_client, args=(client_socket,))
        handle_client_process.start()
        client_socket.close()

服务器

socket

server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

AF_INET指定使用IPv4协议，如果要用更先进的IPv6，就指定为AF_INET6。SOCK_STREAM指定使用面向流的TCP协议，这样，一个Socket对象就创建成功，但是还没有建立连接。

bind

server_socket.bind(("127.0.0.1", 8080))

服务器可能有多块网卡，可以绑定到某一块网卡的IP地址上，也可以用0.0.0.0绑定到所有的网络地址，还可以用127.0.0.1绑定到本机地址。127.0.0.1是一个特殊的IP地址，表示本机地址，如果绑定到这个地址，客户端必须同时在本机运行才能连接，也就是说，外部的计算机无法连接进来。

listen

server_socket.listen(128)

调用listen()方法开始监听端口，传入的参数指定等待连接的最大数量

accept

等待并返回一个客户端的连接，采用多进程来处理要做的事情

while True:
    client_socket, client_address = server_socket.accept()
    handle_client_process = Process(target=handle_client, args=(client_socket,))
    handle_client_process.start()
    client_socket.close()

多进程处理任务

def handle_client(client_socket):
    request_data = client_socket.recv(1024)
    print("request data:", request_data)
    response_start_line = "HTTP/1.0 200 OK\r\n"
    response_headers = "Server: My server\r\n"
    response_body = "hello world"
    response = response_start_line + "\r\n" + response_body
    print("response data:", response)

    client_socket.send(bytes(response, "utf-8"))
    client_socket.close()