urllib HTTPError没有在Python/Django中被捕获
问题描述:
我想用urllib处理HTTPError。 我的设置是使用Django 1.10的anaconda virtualenv中的python3。 当代码得到try,它不会进入except和Django崩溃我的页面告诉我有一个HTTP错误。urllib HTTPError没有在Python/Django中被捕获
下面是代码:
from urllib.request import Request, urlopen
from urllib.error import URLError, HTTPError
try:
req = Request(api.lists.members.get(LIST_ID, client_email))
response = urlopen(req)
except HTTPError as e:
print('Error code: ', e.code)
else:
print('everything is fine')
TRACEBACK:
环境:
Request Method: POST
Request URL: http://127.0.0.1:8000/homepage/
Django Version: 1.10
Python Version: 3.6.1
Installed Applications:
['django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'website']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware']
Traceback:
File "/Users/plfiras/anaconda/lib/python3.6/site-packages/django/core/handlers/exception.py" in inner
39. response = get_response(request)
File "/Users/plfiras/anaconda/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
187. response = self.process_exception_by_middleware(e, request)
File "/Users/plfiras/anaconda/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
185. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/Users/plfiras/vinhood/vinhood-website/website/views.py" in homepage
52. conn = http.client.HTTPConnection(api.lists.members.get(LIST_ID, client_email))
File "/Users/plfiras/anaconda/lib/python3.6/site-packages/mailchimp3/entities/listmembers.py" in get
116. return self._mc_client._get(url=self._build_path(list_id, 'members', subscriber_hash), **queryparams)
File "/Users/plfiras/anaconda/lib/python3.6/site-packages/mailchimp3/mailchimpclient.py" in wrapper
25. return fn(self, *args, **kwargs)
File "/Users/plfiras/anaconda/lib/python3.6/site-packages/mailchimp3/mailchimpclient.py" in _get
100. r.raise_for_status()
File "/Users/plfiras/anaconda/lib/python3.6/site-packages/requests/models.py" in raise_for_status
928. raise HTTPError(http_error_msg, response=self)
Exception Type: HTTPError at /homepage/
Exception Value: 404 Client Error: Not Found for url: https://us13.api.mailchimp.com/3.0/lists/7bdb42e5c9/members/d071e758df3554f0fe89679212ef95e8
答
出于某种原因,并没有追赶HTTPError。 通过用Exception替换HTTPError,它可以工作。
from urllib.request import Request, urlopen
from urllib.error import URLError, HTTPError
try:
req = Request(api.lists.members.get(LIST_ID, client_email))
response = urlopen(req)
except Exception as e:
print('Error code: ', e.code)
else:
print('everything is fine')
答
您正在捕捉错误的异常。看看你回溯的最后一行:
File "/Users/plfiras/anaconda/lib/python3.6/site-packages/requests/models.py" in raise_for_status
928. raise HTTPError(http_error_msg, response=self)
在requests/models.py线31看一看,你会看到以下内容:
from .exceptions import (
HTTPError, MissingSchema, InvalidURL, ChunkedEncodingError,
ContentDecodingError, ConnectionError, StreamConsumedError)
正如你可以看到HTTPError被实际募集来自requests/exceptions.py。看看该文件的顶部,你会看到:
from urllib3.exceptions import HTTPError as BaseHTTPError
class RequestException(IOError):
"""There was an ambiguous exception that occurred while handling your
request.
"""
def __init__(self, *args, **kwargs):
"""Initialize RequestException with `request` and `response` objects."""
response = kwargs.pop('response', None)
self.response = response
self.request = kwargs.pop('request', None)
if (response is not None and not self.request and
hasattr(response, 'request')):
self.request = self.response.request
super(RequestException, self).__init__(*args, **kwargs)
class HTTPError(RequestException):
"""An HTTP error occurred."""
这表明HTTPError被导入为BaseHTTPError,并请求库已经实现了它自己的HTTPError不延伸urlib3.HTTPError 。
所以抓住你需要从请求模块导入HTTPError错误,不urlib,就像这样:
from requests.exceptions import HTTPError
try:
req = Request(api.lists.members.get(LIST_ID, client_email))
response = urlopen(req)
except HTTPError as e:
print('Error code: ', e.code)
else:
print('everything is fine')
发布回溯 –
@ArpitSolanki完成! –
在我的系统上试过你的代码和它的工作状态非常好 –