89 lines
3.4 KiB
Python
89 lines
3.4 KiB
Python
from random import shuffle
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import re
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from django.core.exceptions import ValidationError
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from django.forms import Form, CharField, EmailField, Textarea, ChoiceField, BooleanField
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import sshpubkeys as ssh
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from .models import Townie, SSH_TYPE_CHOICES
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from common.forms import CaptchaField, throttler
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submission_throttle = {}
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throttle_submission = throttler(submission_throttle)
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USERNAME_RE = re.compile(r'[a-z][a-z0-9_]+')
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USERNAME_MIN_LENGTH = 3
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DISPLAY_NAME_RE = re.compile(r"[a-zA-Z0-9_\-']+")
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DISPLAY_MIN_LENGTH = 2
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def validate_username(username):
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if len(username) < USERNAME_MIN_LENGTH:
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raise ValidationError('Username too short.')
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if not USERNAME_RE.match(username):
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raise ValidationError('Username must be all lowercase, start with a letter, and only use the _ special character')
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duplicate = Townie.objects.filter(username=username).count()
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if duplicate > 0:
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raise ValidationError('Username already in use :(')
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def validate_displayname(display_name):
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if len(display_name) < DISPLAY_MIN_LENGTH:
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raise ValidationError('Display name too short.')
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if not DISPLAY_NAME_RE.match(display_name):
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raise ValidationError("Valid characters: a-z, A-Z, 0-9, -, _, and '.")
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def validate_pubkey(pubkey):
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# TODO see if I can get the type out
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key = ssh.SSHKey(pubkey, strict_mode=False, skip_option_parsing=True)
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try:
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key.parse()
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except ssh.InvalidKeyException as e:
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raise ValidationError('Could not validate key: {}'.format(e))
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except NotImplementedError as e:
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raise ValidationError('Invalid key type')
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except Exception as e:
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raise ValidationError('unknown error: {}'.format(e))
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class TownieForm(Form):
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username = CharField(
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validators=(validate_username,),
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help_text='lowercase and no spaces. underscore ok',
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label='username')
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email = EmailField(
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help_text='only used to message you about your account and nothing else.',
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label='e-mail')
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displayname = CharField(
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validators=(validate_displayname,),
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help_text='100% optional. pseudonyms welcome.',
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label='display name',
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required=False)
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reasons = CharField(
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widget=Textarea,
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required=False,
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label='what interests you about tilde.town?',
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help_text='This is a totally optional place for you to tell us what excites you about getting a ~ account. This is mainly just so we can all feel warm fuzzies.')
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captcha = CaptchaField()
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pubkey = CharField(
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widget=Textarea,
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validators=(validate_pubkey,),
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label='SSH public key',
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help_text='if this is not a thing you are familiar with, that\'s okay! you can make one <a href="/users/keymachine">here</a> or read <a href="https://tilde.town/wiki/getting-started/ssh.html">our guide</a> to learn more.')
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pubkey_type = ChoiceField(
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choices=SSH_TYPE_CHOICES,
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label='SSH public key type',
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help_text="unless you know what you're doing you can leave this be.")
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aup = BooleanField(
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label='i super agree to our acceptable use policy',
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help_text='please read our <a href="https://tilde.town/wiki/conduct.html">code of conduct</a> and click this box if you agree.')
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def clean(self):
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result = super().clean()
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if self.errors:
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raise ValidationError('oops, looks like there were some problems below.')
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throttle_submission(self.cleaned_data['email'])
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return result
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