58 lines
1.6 KiB
Python
58 lines
1.6 KiB
Python
'''
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Custom Django model/form field validators for the Save Point Radio project.
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'''
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import re
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from django.core import validators
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from django.core.exceptions import ValidationError
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from django.utils.translation import gettext_lazy as _
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GROUP_NT_UNC = r'file://[A-Za-z0-9!@#$%^&\'\)\(\.\-_{}~]+/'
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GROUP_NT_DRIVE_LETTER = r'file:///[A-Za-z](?:\:|\|)/'
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GROUP_NON_AUTH = r'file:///[A-Za-z0-9!@#$%^&\'\)\(\.\-_{}~]+'
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FILE_IRI_PATTERN = (
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r'^(?P<unc>' +
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GROUP_NT_UNC +
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r')|(?P<driveletter>' +
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GROUP_NT_DRIVE_LETTER +
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r')|(?P<nonauth>' +
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GROUP_NON_AUTH +
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r')'
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)
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class RadioIRIValidator(validators.URLValidator):
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'''
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Validates an RFC3987-defined IRI along with RFC8089 for file:// and other
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custom schemes.
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'''
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message = _('Enter a valid IRI.')
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schemes = ['http', 'https', 'file', 'ftp', 'ftps', 's3']
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def __init__(self, schemes=None, **kwargs):
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super().__init__(**kwargs)
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if schemes is not None:
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self.schemes = schemes
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def __call__(self, value):
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# Check the schemes first
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scheme = value.split('://')[0].lower()
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if scheme not in self.schemes:
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raise ValidationError(self.message, code=self.code)
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# Ignore the non-standard IRI
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if scheme == 'file':
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pattern = re.compile(FILE_IRI_PATTERN)
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if not pattern.match(value):
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raise ValidationError(self.message, code=self.code)
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elif scheme == 's3':
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# Nothing to validate, really. . .
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return
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else:
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super().__call__(value)
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