python socket

Question

下面这段代码我无论输入什么网址
开头总是提示b'HTTP/1.1 301 Moved Permanently
问题出在哪里

import socket

server_addr = input("What server do you want to connect to? ")
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.connect((server_addr, 80))
sock.send(b"GET / HTTP/1.1\r\nHost: " +
          bytes(server_addr, "utf8") +
          b"\r\nConnection: close\r\n\r\n")
reply = sock.recv(10000)
sock.shutdown(socket.SHUT_RDWR)
sock.close()
print(repr(reply))

Answer 1

80端口默认是http协议的，现在很多网站都使用https协议了，http会自动301到https（443端口）