如何在谷歌App Engine上正确安装httplib2？

Question

我把我的 httplib2 文件夹复制到了我的 GAE 项目里，现在出现了以下错误：

line 64, in <module> _ssl_wrap_socket = ssl.wrap_socket

这是 Google App Engine 的问题，还是我不小心把 httplib2 安装错了呢？

完整的错误信息（请求的内容很大！）：

--> --> -->
Traceback (most recent call last):
  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 4053, in _HandleRequest
    self._Dispatch(dispatcher, self.rfile, outfile, env_dict)
  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 3977, in _Dispatch
    base_env_dict=env_dict)
  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 588, in Dispatch
    base_env_dict=base_env_dict)
  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 3050, in Dispatch
    self._module_dict)
  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 2954, in ExecuteCGI
    reset_modules = exec_script(handler_path, cgi_path, hook)
  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 2834, in ExecuteOrImportScript
    exec module_code in script_module.__dict__
  File "C:\Users\quaunaut\Documents\Aptana Studio 3 Workspace\qushoutout\src\main.py", line 25, in <module>
    import twitter as twitter
  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 1505, in Decorate
    return func(self, *args, **kwargs)
  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 2450, in load_module
    return self.FindAndLoadModule(submodule, fullname, search_path)
  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 1505, in Decorate
    return func(self, *args, **kwargs)
  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 2339, in FindAndLoadModule
    description)
  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 1505, in Decorate
    return func(self, *args, **kwargs)
  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 2282, in LoadModuleRestricted
    description)
  File "C:\Users\quaunaut\Documents\Aptana Studio 3 Workspace\qushoutout\src\twitter.py", line 65, in <module>
    import oauth2 as oauth
  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 1505, in Decorate
    return func(self, *args, **kwargs)
  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 2450, in load_module
    return self.FindAndLoadModule(submodule, fullname, search_path)
  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 1505, in Decorate
    return func(self, *args, **kwargs)
  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 2339, in FindAndLoadModule
    description)
  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 1505, in Decorate
    return func(self, *args, **kwargs)
  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 2282, in LoadModuleRestricted
    description)
  File "C:\Users\quaunaut\Documents\Aptana Studio 3 Workspace\qushoutout\src\oauth2\__init__.py", line 32, in <module>
    import httplib2
  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 1505, in Decorate
    return func(self, *args, **kwargs)
  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 2450, in load_module
    return self.FindAndLoadModule(submodule, fullname, search_path)
  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 1505, in Decorate
    return func(self, *args, **kwargs)
  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 2339, in FindAndLoadModule
    description)
  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 1505, in Decorate
    return func(self, *args, **kwargs)
  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 2282, in LoadModuleRestricted
    description)
  File "C:\Users\quaunaut\Documents\Aptana Studio 3 Workspace\qushoutout\src\httplib2\__init__.py", line 64, in <module>
    _ssl_wrap_socket = ssl.wrap_socket
AttributeError: 'module' object has no attribute 'wrap_socket'

我还是遇到这个问题。我能想到的唯一可能导致这个问题的原因是我的电脑在运行 Python 2.7；这可能是问题的原因吗？

Answer 1

这个博客说它能解决GAE的问题。我还没试过，但听起来不错。

Answer 2

AppEngine的沙盒环境不允许直接使用套接字API，也就是说，如果你想在GAE上使用一个http库，它必须要封装urllib（而urllib又是封装了url_fetch API）。

补充说明 看起来httplib2 应该可以正常工作，所以你只需要确保你的路径设置正确就可以了。

可以参考 这个问题

Answer 3

作为一种解决方法：

你可以试试使用 Google App Engine SDK 1.4.3（看起来这是 1.5.0 版本的问题）。

或者强制 httplib2 使用 httplib.FakeSocket，方法是：

import sys
sys.modules['ssl'] = None
import httplib2

那里已经提交了一个新问题：

http://code.google.com/p/googleappengine/issues/detail?id=5064

在 httplib2 的那边似乎已经修复了这个问题：

http://code.google.com/p/httplib2/source/detail?r=cf721c1693a68e9438899be3d78acccae6ab0e30#