我正在编写一个脚本，它将自动从 hostuje.net 页面下载文件。我决定使用 Requests 模块来做到这一点。下载过程如下：
- 当您访问该站点时，它会在 cookie 中提供 PHPSESSID
- 在页面上有一个带有隐藏输入的表单：文件 ID、哈希、文件名、服务器地址、mime 和“REG”（设置为 1 表示您接受使用条款）
- 当您单击“Pobierz plik”（下载）时，会发送带有提及数据的帖子
- 页面正在重新加载并显示下载对话框
我已经阅读了 http 标头并决定通过简单的脚本发送类似的查询。我使用 pyQuery 来获取输入值。问题是，每当我将 postdata 发送到服务器时，都没有 302（找到）代码，而是 200，并且页面告诉我的会话已过期加载。这是我的代码：
from pyquery import PyQuery as pq
import requests
(some code here...)
session = requests.session()
page = session.get(download_page)
d=pq(page.content, parser='html_fragments')
data = {}
for inputs in d("td > input[name]").items():
data[inputs.attr("name")]=inputs.attr("value")
cookies = dict(PHPSESSID=page.cookies['PHPSESSID'])
resp = session.post(download_page, data=data, allow_redirects=False,stream=False, cookies=cookies)
Web 浏览器发送这种 postdata：
POST /file.php?id=c4f50ccefcd1c83e2a48374db4644a0a HTTP/1.1
Host: hostuje.net
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:19.0) Gecko/20100101 Firefox/19.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: pl,en-us;q=0.7,en;q=0.3
Accept-Encoding: gzip, deflate
DNT: 1
Cookie: PHPSESSID=g565im2lqu0csthglgnlb98tp2
Connection: keep-alive
Content-Type: application/x-www-form-urlencoded
Content-Length: 164
OK=1&hasz=c4f50ccefcd1c83e2a48374db4644a0a&id=c4f50ccefcd1c83e2a48374db4644a0a&name=Stupid+Fresh-+Spam+Javelin+Original.mp3&mime=audio%2Fmpeg&k=n4.hostuje.org®=1
响应如下：
HTTP/1.1 302 Found
Date: Wed, 03 Apr 2013 14:42:58 GMT
Server: Apache/2
X-Powered-By: PHP/5.3.3-7+squeeze14
Expires: Mon, 26 Jul 1997 05:00:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Pragma: no-cache
Last-Modified: Wed, 03 Apr 2013 16:42:58 +0200
Location: http://n4.hostuje.org/file.php?id=c4f50ccefcd1c83e2a48374db4644a0a&mime=audio/mpeg&name=Stupid+Fresh-+Spam+Javelin+Original.mp3&sid=eca83088d8cad5bcb194c92e3a5af068
Content-Encoding: gzip
Vary: Accept-Encoding
Content-Length: 26
Connection: close
Content-Type: text/html; charset=ISO-8859-2
这就是我想用我的脚本实现的目标。
<<class 'requests.cookies.RequestsCookieJar'>[<Cookie PHPSESSID=c0v7cdfa0vkntbfdl8cocr01r4 for hostuje.net/>]>
{'Accept-Encoding': 'gzip, deflate, compress', 'Accept': '/', 'User-Agent': 'python-requests/1.2.0 CPython/2.7.3 Linux/3.2.0-39-generic'}
{'OK': '1', 'name': 'Stupid Fresh- Spam Javelin Original.mp3', 'k': 'n4.hostuje.org', 'id': 'c4f50ccefcd1c83e2a48374db4644a0a', 'mime': 'audio/mpeg', 'hasz': 'c4f50ccefcd1c83e2a48374db4644a0a', 'REG': '1'}
它们是 session.cookie、session.headers 和数据字典
附加信息：响应标头
{'content-length': '5337', 'content-encoding': 'gzip', 'expires': 'Mon, 26 Jul 1997 05:00:00 GMT', 'vary': 'Accept-Encoding', 'server': 'Apache/2', 'last-modified': 'Thu, 04 Apr 2013 19:36:58 +0200', 'connection': 'close', 'pragma': 'no-cache', 'cache-control': 'no-store, no-cache, must-revalidate, post-check=0, pre-check=0', 'date': 'Thu, 04 Apr 2013 17:36:58 GMT', 'x-powered-by': 'PHP/5.3.3-7+squeeze14', 'content-type': 'text/html; charset=ISO-8859-2'}
响应内容（因为响应没有方法“正文”）
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另一个更新（r.request.headers 和 r.request.body）
{'Content-Length': u'164', 'Accept-Encoding': 'gzip, deflate, compress', 'Accept': '*/*', 'User-Agent': 'python-requests/1.2.0 CPython/2.7.3 Linux/3.2.0-39-generic', 'Cookie': 'PHPSESSID=teir11avhfk543aapcmmgrn2a5', 'Content-Type': 'application/x-www-form-urlencoded'}
OK=1&name=Stupid+Fresh-+Spam+Javelin+Original.mp3&k=n4.hostuje.org&id=c4f50ccefcd1c83e2a48374db4644a0a&mime=audio%2Fmpeg&hasz=c4f50ccefcd1c83e2a48374db4644a0a®=1