forked from pennersr/django-allauth
/
utils.py
263 lines (223 loc) · 8.48 KB
/
utils.py
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import base64
import re
import unicodedata
import json
from django.core.exceptions import ImproperlyConfigured
from django.core.validators import validate_email, ValidationError
from django.core import urlresolvers
from django.contrib.sites.models import Site
from django.db.models import FieldDoesNotExist
from django.db.models.fields import (DateTimeField, DateField,
EmailField, TimeField,
BinaryField)
from django.utils import six, dateparse
from django.utils.six.moves.urllib.parse import urlsplit
from django.core.serializers.json import DjangoJSONEncoder
try:
from django.utils.encoding import force_text, force_bytes
except ImportError:
from django.utils.encoding import force_unicode as force_text
try:
import importlib
except:
from django.utils import importlib
def _generate_unique_username_base(txts, regex=None):
username = None
regex = regex or '[^\w\s@+.-]'
for txt in txts:
if not txt:
continue
username = unicodedata.normalize('NFKD', force_text(txt))
username = username.encode('ascii', 'ignore').decode('ascii')
username = force_text(re.sub(regex, '', username).lower())
# Django allows for '@' in usernames in order to accomodate for
# project wanting to use e-mail for username. In allauth we don't
# use this, we already have a proper place for putting e-mail
# addresses (EmailAddress), so let's not use the full e-mail
# address and only take the part leading up to the '@'.
username = username.split('@')[0]
username = username.strip()
username = re.sub('\s+', '_', username)
if username:
break
return username or 'user'
def get_username_max_length():
from .account.app_settings import USER_MODEL_USERNAME_FIELD
if USER_MODEL_USERNAME_FIELD is not None:
User = get_user_model()
max_length = User._meta.get_field(USER_MODEL_USERNAME_FIELD).max_length
else:
max_length = 0
return max_length
def generate_unique_username(txts, regex=None):
from .account.app_settings import USER_MODEL_USERNAME_FIELD
username = _generate_unique_username_base(txts, regex)
User = get_user_model()
max_length = get_username_max_length()
i = 0
while True:
try:
if i:
pfx = str(i + 1)
else:
pfx = ''
ret = username[0:max_length - len(pfx)] + pfx
query = {USER_MODEL_USERNAME_FIELD + '__iexact': ret}
User.objects.get(**query)
i += 1
except User.DoesNotExist:
return ret
def valid_email_or_none(email):
ret = None
try:
if email:
validate_email(email)
if len(email) <= EmailField().max_length:
ret = email
except ValidationError:
pass
return ret
def email_address_exists(email, exclude_user=None):
from .account import app_settings as account_settings
from .account.models import EmailAddress
emailaddresses = EmailAddress.objects
if exclude_user:
emailaddresses = emailaddresses.exclude(user=exclude_user)
ret = emailaddresses.filter(email__iexact=email).exists()
if not ret:
email_field = account_settings.USER_MODEL_EMAIL_FIELD
if email_field:
users = get_user_model().objects
if exclude_user:
users = users.exclude(pk=exclude_user.pk)
ret = users.filter(**{email_field+'__iexact': email}).exists()
return ret
def import_attribute(path):
assert isinstance(path, six.string_types)
pkg, attr = path.rsplit('.', 1)
ret = getattr(importlib.import_module(pkg), attr)
return ret
def import_callable(path_or_callable):
if not hasattr(path_or_callable, '__call__'):
ret = import_attribute(path_or_callable)
else:
ret = path_or_callable
return ret
try:
from django.contrib.auth import get_user_model
except ImportError:
# To keep compatibility with Django 1.4
def get_user_model():
from . import app_settings
from django.db.models import get_model
try:
app_label, model_name = app_settings.USER_MODEL.split('.')
except ValueError:
raise ImproperlyConfigured("AUTH_USER_MODEL must be of the"
" form 'app_label.model_name'")
user_model = get_model(app_label, model_name)
if user_model is None:
raise ImproperlyConfigured("AUTH_USER_MODEL refers to model"
" '%s' that has not been installed"
% app_settings.USER_MODEL)
return user_model
def get_current_site(request=None):
"""Wrapper around ``Site.objects.get_current`` to handle ``Site`` lookups
by request in Django >= 1.8.
:param request: optional request object
:type request: :class:`django.http.HttpRequest`
"""
# >= django 1.8
if request and hasattr(Site.objects, '_get_site_by_request'):
site = Site.objects.get_current(request=request)
else:
site = Site.objects.get_current()
return site
def resolve_url(to):
"""
Subset of django.shortcuts.resolve_url (that one is 1.5+)
"""
try:
return urlresolvers.reverse(to)
except urlresolvers.NoReverseMatch:
# If this doesn't "feel" like a URL, re-raise.
if '/' not in to and '.' not in to:
raise
# Finally, fall back and assume it's a URL
return to
def serialize_instance(instance):
"""
Since Django 1.6 items added to the session are no longer pickled,
but JSON encoded by default. We are storing partially complete models
in the session (user, account, token, ...). We cannot use standard
Django serialization, as these are models are not "complete" yet.
Serialization will start complaining about missing relations et al.
"""
data = {}
for k, v in instance.__dict__.items():
if k.startswith('_') or callable(v):
continue
try:
if isinstance(instance._meta.get_field(k), BinaryField):
v = force_text(base64.b64encode(v))
except FieldDoesNotExist:
pass
data[k] = v
return json.loads(json.dumps(data, cls=DjangoJSONEncoder))
def deserialize_instance(model, data):
ret = model()
for k, v in data.items():
if v is not None:
try:
f = model._meta.get_field(k)
if isinstance(f, DateTimeField):
v = dateparse.parse_datetime(v)
elif isinstance(f, TimeField):
v = dateparse.parse_time(v)
elif isinstance(f, DateField):
v = dateparse.parse_date(v)
elif isinstance(f, BinaryField):
v = force_bytes(
base64.b64decode(
force_bytes(v)))
except FieldDoesNotExist:
pass
setattr(ret, k, v)
return ret
def set_form_field_order(form, fields_order):
if hasattr(form.fields, 'keyOrder'):
form.fields.keyOrder = fields_order
else:
# Python 2.7+
from collections import OrderedDict
assert isinstance(form.fields, OrderedDict)
form.fields = OrderedDict((f, form.fields[f])
for f in fields_order)
def build_absolute_uri(request, location, protocol=None):
"""request.build_absolute_uri() helper
Like request.build_absolute_uri, but gracefully handling
the case where request is None.
"""
from .account import app_settings as account_settings
if request is None:
site = get_current_site()
bits = urlsplit(location)
if not (bits.scheme and bits.netloc):
uri = '{proto}://{domain}{url}'.format(
proto=account_settings.DEFAULT_HTTP_PROTOCOL,
domain=site.domain,
url=location)
else:
uri = location
else:
uri = request.build_absolute_uri(location)
if protocol:
uri = protocol + ':' + uri.partition(':')[2]
return uri
def get_form_class(forms, form_id, default_form):
form_class = forms.get(form_id, default_form)
if isinstance(form_class, six.string_types):
form_class = import_attribute(form_class)
return form_class
def get_request_param(request, param, default=None):
return request.POST.get(param) or request.GET.get(param, default)