Socket编程

Socket的编程模型如下图。

Socket编程模型

server

import socket

server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
# bind需要传递tuple作为参数
server.bind(('0.0.0.0', 8080))
server.listen(3)
client, addr = server.accept()

# 获取从客户端发过来的数据
while True:
    data = client.recv(1024)
    print(data.decode("utf8"))
    res = input(">>>: ")
    if res == "exit":
        client.close()
        server.close()
        break
    client.send(res.encode("utf8"))

client

import socket

client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
# 与服务端参数保持一致
client.connect(('127.0.0.1', 8080))

while True:
    res = input(">>>: ")
    if res == "exit":
        break
    client.send(input(">>>: ").encode("utf8"))
    data = client.recv(1024)
    print(data.decode("utf8"))
client.close()

http

通过Socket模拟HTTP请求。

import socket
from urllib.parse import urlparse

def get_html(url):
    # 通过socket请求html
    url = urlparse(url)
    host = url.netloc
    path = url.path
    if path == "":
        path = "/"
    client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    client.connect((host, 80))

    client.send("GET {} HTTP/1.1\r\nHost:{}\r\nConnection:close\r\n\r\n".format(path, host).encode("utf-8"))
    data = b""
    while True:
        recv = client.recv(1024)
        if recv:
            data += recv
        else:
            break
    data = data.decode("utf-8")
    html_data = data.split("\r\n\r\n")[1]
    print(html_data)
    client.close()

get_html("http://www.baidu.com")

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