Question

我使用Python 2.7，在升级到gae 1.7.6之后，我的单元测试被破坏了。我正在使用鼻子和鼻子进行单元测试。有谁知道发生了什么事？任何想法都会非常感激。我觉得这与webob 1.2.3被提升为GA有关。

    self.app.post(task['url'], params, headers)
  File "/Library/Python/2.7/site-packages/WebTest-1.4.0-py2.7.egg/webtest/app.py", line 835, in post
    content_type=content_type)
  File "/Library/Python/2.7/site-packages/WebTest-1.4.0-py2.7.egg/webtest/app.py", line 807, in _gen_request
    expect_errors=expect_errors)
  File "/Library/Python/2.7/site-packages/WebTest-1.4.0-py2.7.egg/webtest/app.py", line 1118, in do_request
    self._check_status(status, res)
  File "/Library/Python/2.7/site-packages/WebTest-1.4.0-py2.7.egg/webtest/app.py", line 1154, in _check_status
    res)
AppError: Bad response: 500 Internal Server Error (not 200 OK or 3xx redirect for http://localhost/task/request_log)
<pre>Traceback (most recent call last):
  File &quot;/Users/***/Downloads/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.5.2/webapp2.py&quot;, line 1089, in __call__
    method(*args, **kwargs)
  File &quot;/Users/***/projects/game_server/game_service/events.py&quot;, line 184, in post
    inputs = pickle.loads(self.request.body)
  File &quot;/Users/***/Downloads/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webob-1.2.3/webob/request.py&quot;, line 677, in _body__get
    self.make_body_seekable() # we need this to have content_length
  File &quot;/Users/***/Downloads/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webob-1.2.3/webob/request.py&quot;, line 922, in make_body_seekable
    self.copy_body()
  File &quot;/Users/***/Downloads/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webob-1.2.3/webob/request.py&quot;, line 945, in copy_body
    self.body = self.body_file.read(self.content_length)
  File &quot;/Users/***/Downloads/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webob-1.2.3/webob/request.py&quot;, line 1528, in readinto
    + &quot;(%d more bytes were expected)&quot; % self.remaining
DisconnectionError: The client disconnected while sending the POST/PUT body (151 more bytes were expected)
</pre>
    self.app.post(task['url'], params, headers)
  File "/Library/Python/2.7/site-packages/WebTest-1.4.0-py2.7.egg/webtest/app.py", line 835, in post
    content_type=content_type)
  File "/Library/Python/2.7/site-packages/WebTest-1.4.0-py2.7.egg/webtest/app.py", line 807, in _gen_request
    expect_errors=expect_errors)
  File "/Library/Python/2.7/site-packages/WebTest-1.4.0-py2.7.egg/webtest/app.py", line 1118, in do_request
    self._check_status(status, res)
  File "/Library/Python/2.7/site-packages/WebTest-1.4.0-py2.7.egg/webtest/app.py", line 1154, in _check_status
    res)
AppError: Bad response: 500 Internal Server Error (not 200 OK or 3xx redirect for http://localhost/task/request_log)
<pre>Traceback (most recent call last):
  File &quot;/Users/***/Downloads/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.5.2/webapp2.py&quot;, line 1089, in __call__
    method(*args, **kwargs)
  File &quot;/Users/***/projects/game_server/game_service/events.py&quot;, line 184, in post
    inputs = pickle.loads(self.request.body)
  File &quot;/Users/***/Downloads/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webob-1.2.3/webob/request.py&quot;, line 677, in _body__get
    self.make_body_seekable() # we need this to have content_length
  File &quot;/Users/***/Downloads/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webob-1.2.3/webob/request.py&quot;, line 922, in make_body_seekable
    self.copy_body()
  File &quot;/Users/***/Downloads/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webob-1.2.3/webob/request.py&quot;, line 945, in copy_body
    self.body = self.body_file.read(self.content_length)
  File &quot;/Users/***/Downloads/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webob-1.2.3/webob/request.py&quot;, line 1528, in readinto
    + &quot;(%d more bytes were expected)&quot; % self.remaining
DisconnectionError: The client disconnected while sending the POST/PUT body (151 more bytes were expected)
</pre>

Answer 1

简短版本： headers可能包含不正确的内容长度;像这样修复它（假设params是str）：

fixed_header = ('Content-Length', str(len(params)))
for i, header in enumerate(headers):
    if header[0] == 'Content-Length':
        headers[i] = fixed_header
        fixed_header = None
        break
if fixed_header:  # in case you're completely missing a Content-Length header
    headers.append(fixed_header)

GAE 1.7.6将默认网络从v0.9更改为v1.2.3。用于检索请求参数的代码（例如，通过webob.Request.get()）在这些版本之间改变。

在1.2.3中，如果您查看BaseRequest.params，则会使用NestedMultiDict创建BaseRequest.POST，cgi.FieldStorage()会使用DisconnectionError检查请求的正文Content-Length标头。如果内容长度不正确，您将获得您遇到的Request.params。

在0.9中，Request.str_params是使用NestedMultiDict构建的，Request.str_POST使用Request.body_ file（不同于1.2.3）构建其StringIO()。这反过来使用预先存在的params，它与headers 一起使用，而不检查Content-Length标题。

因此，您可以在1.7.5中使用不正确的Content-Length标头，但不能在1.7.6中使用。

任务队列数据是Base64编码的。我怀疑您在追溯的第一行传入的GetTasks()已经从其Base64格式解码，但您没有更新{{1}}中的Content-Length标头以反映这一点。我怀疑你从任务队列存根{{1}}获得了任务的头文件，其任务队列存根的内容长度设置为原始Base64编码数据的长度。

Answer 2

您发送的请求可能缺少正确的Content-Length标头。

如果没有它，服务器无法确切地确定客户端是否已上传所有数据，或者他是否在传输过程中断开连接。

升级到app engine 1.7.6后出现断开连接错误

2 个答案: