python 中的 Web 客户端无法正常工作

Question

我写了一个 python 代码，它将通过连接到端口 80 并发送 GET http 请求从 Web 服务器获取数据。但这并没有给我网页的数据，而是给了我一个 html 代码说 'The web page has moved'.

请帮帮我

下面是代码和示例输出

import socket

def web_client():
    host=str(input("\nEnter the site from which you want to recieve data \n\n -> "))
    port=80
    s=socket.socket()
    ip=socket.gethostbyname(host)
    s.connect((ip, port))
    print("\nconnection successful with "+ str(host)+" on ip "+str(ip))
    msg="GET / HTTP/1.1\r\n\r\n"
    encoded_msg=bytes(msg, "utf-8")
    s.send(encoded_msg)
    data=s.recv(2048)
    decoded_data=data.decode("utf-8")
    print("\n"+decoded_data)

web_client()

我输入 'www.google.com' 时得到的输出如下所示

Enter the site from which you want to recieve data 

 -> www.google.com

connection successful with www.google.com on ip 216.58.220.36

HTTP/1.1 302 Found
Cache-Control: private
Content-Type: text/html; charset=UTF-8
Location: http://www.google.co.in/?gfe_rd=cr&ei=k09IVbiMKq_v8wez3oGICw
Content-Length: 261
Date: Tue, 05 May 2015 05:05:23 GMT
Server: GFE/2.0
Alternate-Protocol: 80:quic,p=1

<HTML><HEAD><meta http-equiv="content-type" content="text/html;charset=utf-8">
<TITLE>302 Moved</TITLE></HEAD><BODY>
<H1>302 Moved</H1>
The document has moved
<A HREF="http://www.google.co.in/?gfe_rd=cr&amp;ei=k09IVbiMKq_v8wez3oGICw">here</A>.
</BODY></HTML>

Answer 1

Google.com 试图将您重定向到区域域。 socket 包不支持 HTTP 重定向（你应该自己实现）。最简单的解决方案是安装 Requests 库：

pip install requests

使用这个库发出 HTTP 请求真的很容易：

import requests
site = raw_input("\nEnter the site from which you want to receive data \n\n -> ")
r = requests.get(site, allow_redirects=True)
print r.headers
print r.content

python 中的 Web 客户端无法正常工作

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