可以在 Ironpython 2.7.5 中使用请求吗？答案

【问题标题】：It's possible to use requests in ironpython 2.7.5?可以在 Ironpython 2.7.5 中使用请求吗？
【发布时间】：2016-02-02 19:26:37
【问题描述】：

我已经在 Ironpython 上成功安装了 pip。但是，当我尝试在管理员控制台中使用“ipy.exe -X:Frames -m pip install requests”安装请求时，我得到以下信息：

------------------------------------------------------------
C:\Program Files (x86)\IronPython 2.7\lib\site-packages\pip\__main__.py run on 02/02/16 16:13:53
Downloading/unpacking html5lib
  Getting page https://pypi.python.org/simple/html5lib/
Cleaning up...
  Removing temporary dir c:\users\panta\appdata\local\temp\pip_build_panta...
Exception:
Traceback (most recent call last):
  File "C:\Program Files (x86)\IronPython 2.7\lib\site-packages\pip\basecommand.py", line 122, in main
    status = self.run(options, args)
  File "C:\Program Files (x86)\IronPython 2.7\lib\site-packages\pip\commands\install.py", line 278, in run
    requirement_set.prepare_files(finder, force_root_egg_info=self.bundle, bundle=self.bundle)
  File "C:\Program Files (x86)\IronPython 2.7\lib\site-packages\pip\req.py", line 1183, in prepare_files
    url = finder.find_requirement(req_to_install, upgrade=self.upgrade)
  File "C:\Program Files (x86)\IronPython 2.7\lib\site-packages\pip\index.py", line 194, in find_requirement
    page = self._get_page(main_index_url, req)
  File "C:\Program Files (x86)\IronPython 2.7\lib\site-packages\pip\index.py", line 566, in _get_page
    return HTMLPage.get_page(link, req,
  File "C:\Program Files (x86)\IronPython 2.7\lib\site-packages\pip\index.py", line 670, in get_page
    resp = session.get(url, headers={"Accept": "text/html"})
  File "C:\Program Files (x86)\IronPython 2.7\lib\site-packages\pip\_vendor\requests\sessions.py", line 468, in get
    return self.request('GET', url, **kwargs)
  File "C:\Program Files (x86)\IronPython 2.7\lib\site-packages\pip\download.py", line 237, in request
    return super(PipSession, self).request(method, url, *args, **kwargs)
  File "C:\Program Files (x86)\IronPython 2.7\lib\site-packages\pip\_vendor\requests\sessions.py", line 456, in request
    resp = self.send(prep, **send_kwargs)
  File "C:\Program Files (x86)\IronPython 2.7\lib\site-packages\pip\_vendor\requests\sessions.py", line 559, in send
    r = adapter.send(request, **kwargs)
  File "C:\Program Files (x86)\IronPython 2.7\lib\site-packages\pip\_vendor\requests\adapters.py", line 317, in send
    resp = conn.urlopen(
  File "C:\Program Files (x86)\IronPython 2.7\lib\site-packages\pip\_vendor\requests\packages\urllib3\connectionpool.py", line 491, in urlopen
    httplib_response = self._make_request(conn, method, url,
  File "C:\Program Files (x86)\IronPython 2.7\lib\site-packages\pip\_vendor\requests\packages\urllib3\connectionpool.py", line 291, in _make_request
    conn.request(method, url, **httplib_request_kw)
  File "C:\Program Files (x86)\IronPython 2.7\Lib\httplib.py", line 955, in request
    self._send_request(method, url, body, headers)
  File "C:\Program Files (x86)\IronPython 2.7\Lib\httplib.py", line 989, in _send_request
    self.endheaders(body)
  File "C:\Program Files (x86)\IronPython 2.7\Lib\httplib.py", line 951, in endheaders
    self._send_output(message_body)
  File "C:\Program Files (x86)\IronPython 2.7\Lib\httplib.py", line 811, in _send_output
    self.send(msg)
  File "C:\Program Files (x86)\IronPython 2.7\Lib\httplib.py", line 773, in send
    self.connect()
  File "C:\Program Files (x86)\IronPython 2.7\lib\site-packages\pip\_vendor\requests\packages\urllib3\connection.py", line 197, in connect
    match_hostname(self.sock.getpeercert(),
  File "C:\Program Files (x86)\IronPython 2.7\lib\site-packages\pip\_vendor\requests\packages\urllib3\packages\ssl_match_hostname\_implementation.py", line 88, in match_hostname
    for key, value in sub:
ValueError: too many values to unpack

那么，现在有一些方法可以在 Ironpython 上安装支持 pip 的请求吗？我尝试使用（在管理员控制台中）：

ipy.exe -X:Frames -m pip 安装请求
ipy.exe -X:FullFrames -m pip 安装请求
ipy.exe -m pip 安装请求
ipy.exe -X:Frames Scripts\pip2.7.exe 安装请求
ipy.exe -X:FullFrames Scripts\pip2.7.exe 安装请求
ipy.exe -X:FullFrames Scripts\pip2.exe 安装请求
ipy.exe -X:FullFrames Scripts\easy_install-2.7.exe 请求

当我尝试“ipy.exe -X:FullFrames -m easy_install requests”时，我得到：

C:\Program Files (x86)\IronPython 2.7\Lib\weakref.py:1: DeprecationWarning: object.__init__() takes no parameters for type KeyedRef
  """Weak reference support for Python.
Searching for requests
Reading https://pypi.python.org/simple/requests/
Best match: requests 2.9.1
Downloading https://pypi.python.org/packages/source/r/requests/requests-2.9.1.tar.gz#md5=0b7f480d19012ec52bab78292efd976d
Processing requests-2.9.1.tar.gz
Writing c:\users\panta\appdata\local\temp\easy_install-mbdcgv\requests-2.9.1\setup.cfg
Running requests-2.9.1\setup.py -q bdist_egg --dist-dir c:\users\panta\appdata\local\temp\easy_install-mbdcgv\requests-2.9.1\egg-dist-tmp-rzrv6w
warning: build_py: byte-compiling is disabled, skipping.

warning: install_lib: byte-compiling is disabled, skipping.

warning: easy_install: byte-compiling is disabled, skipping.

它使用 setup.py 创建文件夹 C:\Users\panta\AppData\Local\Temp\easy_install-mbdcgv\requests-2.9.1 但是当我尝试运行时，它会给出错误“未提供命令”。那么，有没有办法在 ironpython 2.7.5 上导入请求？

编辑：现在使用 easy_install 它“工作”，但是当我尝试“导入请求”时，我收到以下信息：

>>> import requests
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Program Files (x86)\IronPython 2.7\lib\site-packages\requests-2.9.1-py2.7.egg\requests\__init__.py", line 53, in <module>
  File "C:\Program Files (x86)\IronPython 2.7\lib\site-packages\requests-2.9.1-py2.7.egg\requests\packages\__init__.py", line 27, in <module>
  File "C:\Program Files (x86)\IronPython 2.7\lib\site-packages\requests-2.9.1-py2.7.egg\requests\packages\urllib3\__init__.py", line 8, in <module>
  File "C:\Program Files (x86)\IronPython 2.7\lib\site-packages\requests-2.9.1-py2.7.egg\requests\packages\urllib3\connectionpool.py", line 34, in <module>
  File "C:\Program Files (x86)\IronPython 2.7\lib\site-packages\requests-2.9.1-py2.7.egg\requests\packages\urllib3\packages\six.py", line 330, in <module>
  File "C:\Program Files (x86)\IronPython 2.7\lib\site-packages\requests-2.9.1-py2.7.egg\requests\packages\urllib3\packages\six.py", line 320, in exec_
AttributeError: 'module' object has no attribute '_getframe'

那么，ironpython 没有 requests 模块吗？

【问题讨论】：

看起来 SSL 层不兼容。 setup.py 接受命令，例如 setup.py install。但是，pip 表明 requests 安装后将无法工作； pip 使用 requests.
见github.com/kennethreitz/requests/issues/2324; six 与 IronPython 不兼容似乎是唯一的问题。
如果ironpython不行，你可以试试pythonnet，但这取决于你的应用
现在我正在使用来自 .net 的 WebRequest。它就像一个魅力。在使用 webrequest 之前，我使用的是 urllib2，但是当我在函数中使用它太多次时，由于某种原因（stackoverflow.com/questions/35075110/…）出现了 stackoverflow 异常，现在使用 webrequest，stackoverflow 异常不再发生。
看起来您设法安装了它，但在最后一次调用（您的编辑）中您忘记提供 -X:Frames

标签： python installation pip python-requests ironpython

【解决方案1】：

不幸的是，urllib3 使用的six 库（又被requests 使用）与 IronPython 不兼容。请参阅 six 项目跟踪器中的 issue 135，这可能有解决方法。

显然，这是唯一阻碍 IronPython 兼容性的事情，请参阅requests 问题跟踪器中的issue #2324。

您可能可以通过在six 模块中将exec_() 的定义替换为直接调用exec() 来使其工作。 urllib3 实际上并没有使用任何对 six.exec_() 的调用，而 exec() 在 Python 2 代码中工作得很好。

【讨论】：

【解决方案2】：

我相信它至少适用于琐碎的情况。

我的确切安装命令是：

ipy.exe -X:Frames -m pip install --user requests

以及紧随其后的示例会话：

c:\cygwin64\home\rejap>ipy -X:Frames
IronPython 2.7.5 (2.7.5.0) on .NET 4.0.30319.42000 (32-bit)
Type "help", "copyright", "credits" or "license" for more information.
>>> import requests
>>> r=requests.get('http://google.com')
C:\Users\rejap\AppData\Roaming\Python\IronPython27\site-packages\requests\packages\urllib3\connectionpool.py:1: DeprecationWarning: object.__new__() takes no parameters
from __future__ import absolute_import
>>> r
<Response [200]>
>>>

【讨论】：