django - Django 的 URL 字段测试问题

Question

有人可以澄清我为什么这个网址 http://www.nacolmeia.com.br/do/Home/oferta/EnER未被 URLField 的 Django 生成的表单接受？

:)

谢谢

Answer 1

您是否在尝试验证站点的同一台服务器上托管站点？ docs

Note that when you're using the single-threaded development server, validating a URL being served by the same server will hang. This should not be a problem for multithreaded servers.

它看起来不像是表单级别的失败验证

>>> from django import forms
>>> f = forms.URLField()
>>> f.clean('http://www.nacolmeia.com.br/do/Home/oferta/EnER')
u'http://www.nacolmeia.com.br/do/Home/oferta/EnER'
>>> f.clean('sadfas')
Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/home/dev/.virtualenvs/thepidb/lib/python2.7/site-packages/django/forms/fields.py", line 171, in clean
    self.run_validators(value)
  File "/home/dev/.virtualenvs/thepidb/lib/python2.7/site-packages/django/forms/fields.py", line 160, in run_validators
    raise ValidationError(errors)
ValidationError: [u'Enter a valid URL.']
>>> 

如果您不需要验证网站没有返回 404，请在您的 models.py 中

url = models.URLField(verify_exists=False)

编辑:

在 django 源代码中进行了一些挖掘后 here 和一些与 shell 有关的东西，我仍然不确定为什么带大写的 URL 会导致重定向循环。

>>> from django.core.validators import URLValidator
>>> u = URLValidator(verify_exists=True)
>>> u.__call__('http://www.nacolmeia.com.br/do/Home/oferta/EnER')
Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/home/dev/.virtualenvs/thepidb/lib/python2.7/site-packages/django/core/validators.py", line 105, in __call__
    raise broken_error
ValidationError: [u'This URL appears to be a broken link.']
>>> u.__call__('http://www.nacolmeia.com.br/do/home/oferta/ener')
>>> 

引发的实际异常是 HTTPError:

  File "/usr/lib/python2.7/urllib2.py", line 606, in http_error_302
    return self.parent.open(new, timeout=req.timeout)
  File "/usr/lib/python2.7/urllib2.py", line 398, in open
    response = meth(req, response)
  File "/usr/lib/python2.7/urllib2.py", line 511, in http_response
    'http', request, response, code, msg, hdrs)
  File "/usr/lib/python2.7/urllib2.py", line 430, in error
    result = self._call_chain(*args)
  File "/usr/lib/python2.7/urllib2.py", line 370, in _call_chain
    result = func(*args)
  File "/usr/lib/python2.7/urllib2.py", line 606, in http_error_302
    return self.parent.open(new, timeout=req.timeout)
  File "/usr/lib/python2.7/urllib2.py", line 398, in open
    response = meth(req, response)
  File "/usr/lib/python2.7/urllib2.py", line 511, in http_response
    'http', request, response, code, msg, hdrs)
  File "/usr/lib/python2.7/urllib2.py", line 430, in error
    result = self._call_chain(*args)
  File "/usr/lib/python2.7/urllib2.py", line 370, in _call_chain
    result = func(*args)
  File "/usr/lib/python2.7/urllib2.py", line 596, in http_error_302
    self.inf_msg + msg, headers, fp)
HTTPError: HTTP Error 302: The HTTP server returned a redirect error that would lead to an infinite loop.
The last 30x error message was:
Found
>>> 

这里有一些关于 HTTPError 的帖子: here 和 here

似乎它与cookie有关，但我无法提供一个很好的解释，我会把它留给其他人。

如果您不想关闭验证但不关心 url 的大小写，一个可能有效的解决方法是覆盖表单的 clean_field 方法。

def clean_your_url_field(self):
    return self.cleaned_data['your_url_field'].lower()