导致VerifiedHTTPSConnection对象没有属性“_tunnel_host”的GET请求

Question

我使用python请求库向GAE上托管的API发出HTTP请求。请求版本是requests==2.20.0，并使用虚拟环境通过pip安装。

据报道，这个问题是由过时的python版本引起的，我正在运行python 2的最新版本(2.7.15)。

下面是代码片段：

endpoint_url = API_URL + "some/endpoint/%s" % some_variable
response = requests.get(url=endpoint_url)
return response.text

这里是堆积如山：

Traceback (most recent call last):
File "/Users/rhys/Desktop/Projects/git- 
repositories/MitigatingCircumstancesTracker/lib/flask/app.py", line 2292, in 
wsgi_app
response = self.full_dispatch_request()
File "/Users/rhys/Desktop/Projects/git-r 
repositories/MitigatingCircumstancesTracker/lib/flask/app.py", line 1815, in 
full_dispatch_request
rv = self.handle_user_exception(e)
File "/Users/rhys/Desktop/Projects/git- 
repositories/MitigatingCircumstancesTracker/lib/flask/app.py", line 1718, in 
handle_user_exception
reraise(exc_type, exc_value, tb)
File "/Users/rhys/Desktop/Projects/git- 
repositories/MitigatingCircumstancesTracker/lib/flask/app.py", line 1813, in 
full_dispatch_request
rv = self.dispatch_request()
File "/Users/rhys/Desktop/Projects/git- 
repositories/MitigatingCircumstancesTracker/lib/flask/app.py", line 1799, in 
dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "/Users/rhys/Desktop/Projects/git- 
repositories/MitigatingCircumstancesTracker/main.py", line 83, in login
response = requests.get(url=endpoint_url)
File "/Users/rhys/Desktop/Projects/git- 
repositories/MitigatingCircumstancesTracker/lib/requests/api.py", line 75, in 
get
return request('get', url, params=params, **kwargs)
File "/Users/rhys/Desktop/Projects/git- 
repositories/MitigatingCircumstancesTracker/lib/requests/api.py", line 60, in 
request
return session.request(method=method, url=url, **kwargs)
File "/Users/rhys/Desktop/Projects/git- 
repositories/MitigatingCircumstancesTracker/lib/requests/sessions.py", line 
524, in request
resp = self.send(prep, **send_kwargs)
File "/Users/rhys/Desktop/Projects/git- 
repositories/MitigatingCircumstancesTracker/lib/requests/sessions.py", line 
637, in send
r = adapter.send(request, **kwargs)
File "/Users/rhys/Desktop/Projects/git- 
repositories/MitigatingCircumstancesTracker/lib/requests/adapters.py", line 
449, in send
timeout=timeout
File "/Users/rhys/Desktop/Projects/git- 
repositories/MitigatingCircumstancesTracker/lib/urllib3/connectionpool.py", 
line 600, in urlopen
chunked=chunked)
File "/Users/rhys/Desktop/Projects/git- 
repositories/MitigatingCircumstancesTracker/lib/urllib3/connectionpool.py", 
line 343, in _make_request
self._validate_conn(conn)
File "/Users/rhys/Desktop/Projects/git- 
repositories/MitigatingCircumstancesTracker/lib/urllib3/connectionpool.py", 
line 839, in _validate_conn
conn.connect()
File "/Users/rhys/Desktop/Projects/git- 
repositories/MitigatingCircumstancesTracker/lib/urllib3/connection.py", line 
304, in connect
if self._tunnel_host:
AttributeError: 'VerifiedHTTPSConnection' object has no attribute 
'_tunnel_host'

来自'python --version' 2.7.15的Python版本

requirements.txt：

bcrypt==3.1.4
certifi==2018.10.15
cffi==1.11.5
chardet==3.0.4
Click==7.0
Flask==1.0.2
idna==2.7
itsdangerous==0.24
Jinja2==2.10
MarkupSafe==1.0
pycparser==2.19
requests==2.20.0
six==1.11.0
urllib3==1.24
Werkzeug==0.14.1

Answer 1

我也有同样的问题。在我的例子中，这显然与Google无法在本地开发环境(使用SDK)中处理请求有关。需要AppEngineAdapter requests_toolbelt。之后为我工作过。

Answer 2

为了修复与Google一起工作的请求，但也允许我的应用程序在GAE之外运行，我添加了以下代码：

try:
    from google.appengine.api import urlfetch
    from requests_toolbelt.adapters import appengine
    appengine.monkeypatch()
except ImportError:
    pass