socket_http.py

#! -*- encoding=utf-8 -*-
# requests ->基于 urllib ->基于 socket
import socket
from urllib.parse import urlparse

def get_url(url):
    # 通过socket请求html
    url = urlparse(url)
    host = url.netloc       # 获取主域名 host
    path = url.path
    if path == "":
        path = "/" 
    # 建立socket连接
    client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    client.connect((host, 80))         # 接收tuple

    # 发送数据，注意格式
    client.send("GET {} HTTP/1.1\r\nHost:{}\r\nConnection:close\r\n\r\n".format(path, host).encode("utf8"))
    # 为了防止取的数据不足
    data = b""
    while True:
        d = client.recv(1024)
        if d:
            data += d
        else:
            break
    data = data.decode("utf8")
    html_data = data.split("\r\n\r\n")[1]
    print(html_data)
    client.close()

if __name__ == "__main__":
    get_url("http://www.baidu.com")