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我正试图在我用 Django 制作的网站上获取我的 Twitter 时间线。为此，我在http://www.pixeldonor.com/blog/2010/aug/15/create-simple-twitter-app-django/上找到了一段很好的代码，我在本地开发副本中实现了它的网站。本地一切正常！显示了推文，我没有收到任何错误。

现在我已经在线部署了我的网站，我似乎遇到了一个我无法解决的错误。

这是我得到的错误：

TemplateSyntaxError at /
Caught TypeError while rendering: must be string or buffer, not None

Request Method: GET
Request URL:    http://marcostrijker.com/
Django Version: 1.3
Exception Type: TemplateSyntaxError
Exception Value: Caught TypeError while rendering: must be string or buffer, not None
Exception Location: /home/mstrijker/lib/python2.7/oauth2-1.5.170py2.7.egg/oauth2/__init__.py in sign_request, line 493
Python Executable:  /usr/local/bin/python  
Python Version: 2.7.1
Python Path:    
['/home/mstrijker/webapps/django/vorm4ufolio',
 '/home/mstrijker/webapps/django',
 '/home/mstrijker/webapps/django/lib/python2.7',
 '/home/mstrijker/lib/python2.7/oauth2-1.5.170-py2.7.egg',
 '/home/mstrijker/lib/python2.7/httplib2-0.6.0-py2.7.egg',
 '/home/mstrijker/lib/python2.7/pip-1.0.1-py2.7.egg',
 '/home/mstrijker/lib/python2.7',
 '/usr/local/lib/python27.zip',
 '/usr/local/lib/python2.7',
 '/usr/local/lib/python2.7/plat-linux2',
 '/usr/local/lib/python2.7/lib-tk',
 '/usr/local/lib/python2.7/lib-old',
 '/usr/local/lib/python2.7/lib-dynload',
 '/usr/local/lib/python2.7/site-packages',
 '/usr/local/lib/python2.7/site-packages/PIL']
Server time:    Thu, 12 May 2011 21:05:17 +0200

之后，它显示以下内容：

模板错误

在模板 /home/mstrijker/webapps/django/vorm4ufolio/templates/index.html 中，第 85 行出错

渲染时捕获 TypeError：必须是字符串或缓冲区，而不是无

<div id="twitter">
    <a href="http://twitter.com/#!/Octopixell"><img src="{{ STATIC_URL }}images/twitter_icon.png" alt="twitter_logo"></a>
    <div id="tweetcontainer">
        {% get_tweet_list 5 as tweets %}
        {% for tweet in tweets %}
            <div class="tweettop"></div>
                <div class="tweet">
                    {{ tweet.text|safe|twitterize }} <br /> {{ tweet.created_at|date:"M d, Y" }}
                </div>
            <div class="tweetbottom"></div>
        {% endfor %}
    </div>
</div>

{% get_tweet_list 5 as tweets %}是第 85 行

这里也是错误的回溯：

Traceback:
File "/home/mstrijker/webapps/django/lib/python2.7/django/core/handlers/base.py" in get_response
  111.                         response = callback(request, *callback_args, **callback_kwargs)
File "/home/mstrijker/webapps/django/vorm4ufolio/portfolio/views.py" in index
  17.     return render_to_response('index.html', {'new_list': new_list,}, context_instance=RequestContext(request))
File "/home/mstrijker/webapps/django/lib/python2.7/django/shortcuts/__init__.py" in render_to_response
  20.     return HttpResponse(loader.render_to_string(*args, **kwargs), **httpresponse_kwargs)
File "/home/mstrijker/webapps/django/lib/python2.7/django/template/loader.py" in render_to_string
  188.         return t.render(context_instance)
File "/home/mstrijker/webapps/django/lib/python2.7/django/template/base.py" in render
  123.             return self._render(context)
File "/home/mstrijker/webapps/django/lib/python2.7/django/template/base.py" in _render
  117.         return self.nodelist.render(context)
File "/home/mstrijker/webapps/django/lib/python2.7/django/template/base.py" in render
  744.                 bits.append(self.render_node(node, context))
File "/home/mstrijker/webapps/django/lib/python2.7/django/template/debug.py" in render_node
  73.             result = node.render(context)
File "/home/mstrijker/lib/python2.7/oauth2-1.5.170-py2.7.egg/oauth2/__init__.py" in request
  662.         req.sign_request(self.method, self.consumer, self.token)
File "/home/mstrijker/lib/python2.7/oauth2-1.5.170-py2.7.egg/oauth2/__init__.py" in sign_request
  493.             self['oauth_body_hash'] = base64.b64encode(sha(self.body).digest())

Exception Type: TemplateSyntaxError at /
Exception Value: Caught TypeError while rendering: must be string or buffer, not None

我希望这将为你们提供帮助我解决此问题所需的必要信息。如果你们需要更多信息或代码，请问我，我会提供。

4

2 回答 2

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我浏览了 oauth2 的代码，我怀疑 oauth_req 签名中 post_body 的默认值应该是 ''，而不是 None。

def oauth_req(url, http_method="GET", post_body=None, http_headers=None):

试试看。

于 2011-05-12T22:02:26.823 回答
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这个问题是 python-oauth2 模块中存在一个错误，当请求（或后续请求）的主体为None. 下面是 sign_request 函数oauth2/\_\_init\_\_.py： 

def sign_request(self, signature_method, consumer, token):
    """Set the signature parameter to the result of sign."""

    if not self.is_form_encoded:            
        # according to
        # http://oauth.googlecode.com/svn/spec/ext/body_hash/1.0/oauth-bodyhash.html
        # section 4.1.1 "OAuth Consumers MUST NOT include an
        # oauth_body_hash parameter on requests with form-encoded
        # request bodies."
        self['oauth_body_hash'] = base64.b64encode(sha(self.body).digest())

    if 'oauth_consumer_key' not in self:
        self['oauth_consumer_key'] = consumer.key

    if token and 'oauth_token' not in self:
        self['oauth_token'] = token.key

    self['oauth_signature_method'] = signature_method.name
    self['oauth_signature'] = signature_method.sign(self, consumer, token)

第 493 行是： 

self['oauth_body_hash'] = base64.b64encode(sha(self.body).digest())

所以不知何故，身体被设置为None. 由于 httplib2None在跟踪重定向时将请求正文设置为，我的猜测是，当您在线部署时，httplib2 正在跟踪某处的新重定向，然后将正文设置为None并引发此错误。

好消息是这是一个我已经修复并发出拉取请求的错误。在它被接受之前，您可以编辑自己的oauth2/\_\_init\_\_.py文件来处理正文的情况，None或者下载并使用我的 python-oauth 版本。

于 2013-04-27T00:27:38.160 回答