mirror of
https://github.com/encode/django-rest-framework.git
synced 2024-11-29 13:04:03 +03:00
9ec81e32da
* substitute '@@' code block delimiter with triple back-tick, more consistent with other markdown extensions * remove development print and allow spaces between triple backtick and syntax name in codeblock * update comparison content for markdown test
345 lines
10 KiB
Python
345 lines
10 KiB
Python
"""
|
|
The `compat` module provides support for backwards compatibility with older
|
|
versions of Django/Python, and compatibility wrappers around optional packages.
|
|
"""
|
|
|
|
# flake8: noqa
|
|
from __future__ import unicode_literals
|
|
|
|
import inspect
|
|
|
|
import django
|
|
from django.apps import apps
|
|
from django.conf import settings
|
|
from django.contrib.auth import views
|
|
from django.core.exceptions import ImproperlyConfigured, ValidationError
|
|
from django.core.validators import \
|
|
MaxLengthValidator as DjangoMaxLengthValidator
|
|
from django.core.validators import MaxValueValidator as DjangoMaxValueValidator
|
|
from django.core.validators import \
|
|
MinLengthValidator as DjangoMinLengthValidator
|
|
from django.core.validators import MinValueValidator as DjangoMinValueValidator
|
|
from django.db import connection, models, transaction
|
|
from django.template import Context, RequestContext, Template
|
|
from django.utils import six
|
|
from django.views.generic import View
|
|
|
|
try:
|
|
from django.urls import (
|
|
NoReverseMatch, URLPattern as RegexURLPattern, URLResolver as RegexURLResolver, ResolverMatch, Resolver404, get_script_prefix, reverse, reverse_lazy, resolve
|
|
)
|
|
|
|
except ImportError:
|
|
from django.core.urlresolvers import ( # Will be removed in Django 2.0
|
|
NoReverseMatch, RegexURLPattern, RegexURLResolver, ResolverMatch, Resolver404, get_script_prefix, reverse, reverse_lazy, resolve
|
|
)
|
|
|
|
|
|
def get_regex_pattern(urlpattern):
|
|
if hasattr(urlpattern, 'pattern'):
|
|
# Django 2.0
|
|
return urlpattern.pattern.regex.pattern
|
|
else:
|
|
# Django < 2.0
|
|
return urlpattern.regex.pattern
|
|
|
|
|
|
def make_url_resolver(regex, urlpatterns):
|
|
try:
|
|
# Django 2.0
|
|
from django.urls.resolvers import RegexPattern
|
|
return RegexURLResolver(RegexPattern(regex), urlpatterns)
|
|
|
|
except ImportError:
|
|
# Django < 2.0
|
|
return RegexURLResolver(regex, urlpatterns)
|
|
|
|
|
|
try:
|
|
import urlparse # Python 2.x
|
|
except ImportError:
|
|
import urllib.parse as urlparse
|
|
|
|
|
|
def unicode_repr(instance):
|
|
# Get the repr of an instance, but ensure it is a unicode string
|
|
# on both python 3 (already the case) and 2 (not the case).
|
|
if six.PY2:
|
|
return repr(instance).decode('utf-8')
|
|
return repr(instance)
|
|
|
|
|
|
def unicode_to_repr(value):
|
|
# Coerce a unicode string to the correct repr return type, depending on
|
|
# the Python version. We wrap all our `__repr__` implementations with
|
|
# this and then use unicode throughout internally.
|
|
if six.PY2:
|
|
return value.encode('utf-8')
|
|
return value
|
|
|
|
|
|
def unicode_http_header(value):
|
|
# Coerce HTTP header value to unicode.
|
|
if isinstance(value, six.binary_type):
|
|
return value.decode('iso-8859-1')
|
|
return value
|
|
|
|
|
|
def total_seconds(timedelta):
|
|
# TimeDelta.total_seconds() is only available in Python 2.7
|
|
if hasattr(timedelta, 'total_seconds'):
|
|
return timedelta.total_seconds()
|
|
else:
|
|
return (timedelta.days * 86400.0) + float(timedelta.seconds) + (timedelta.microseconds / 1000000.0)
|
|
|
|
|
|
def distinct(queryset, base):
|
|
if settings.DATABASES[queryset.db]["ENGINE"] == "django.db.backends.oracle":
|
|
# distinct analogue for Oracle users
|
|
return base.filter(pk__in=set(queryset.values_list('pk', flat=True)))
|
|
return queryset.distinct()
|
|
|
|
|
|
def _resolve_model(obj):
|
|
"""
|
|
Resolve supplied `obj` to a Django model class.
|
|
|
|
`obj` must be a Django model class itself, or a string
|
|
representation of one. Useful in situations like GH #1225 where
|
|
Django may not have resolved a string-based reference to a model in
|
|
another model's foreign key definition.
|
|
|
|
String representations should have the format:
|
|
'appname.ModelName'
|
|
"""
|
|
if isinstance(obj, six.string_types) and len(obj.split('.')) == 2:
|
|
app_name, model_name = obj.split('.')
|
|
resolved_model = apps.get_model(app_name, model_name)
|
|
if resolved_model is None:
|
|
msg = "Django did not return a model for {0}.{1}"
|
|
raise ImproperlyConfigured(msg.format(app_name, model_name))
|
|
return resolved_model
|
|
elif inspect.isclass(obj) and issubclass(obj, models.Model):
|
|
return obj
|
|
raise ValueError("{0} is not a Django model".format(obj))
|
|
|
|
|
|
# django.contrib.postgres requires psycopg2
|
|
try:
|
|
from django.contrib.postgres import fields as postgres_fields
|
|
except ImportError:
|
|
postgres_fields = None
|
|
|
|
|
|
# coreapi is optional (Note that uritemplate is a dependency of coreapi)
|
|
try:
|
|
import coreapi
|
|
import uritemplate
|
|
except (ImportError, SyntaxError):
|
|
# SyntaxError is possible under python 3.2
|
|
coreapi = None
|
|
uritemplate = None
|
|
|
|
|
|
# coreschema is optional
|
|
try:
|
|
import coreschema
|
|
except ImportError:
|
|
coreschema = None
|
|
|
|
|
|
# django-crispy-forms is optional
|
|
try:
|
|
import crispy_forms
|
|
except ImportError:
|
|
crispy_forms = None
|
|
|
|
|
|
# requests is optional
|
|
try:
|
|
import requests
|
|
except ImportError:
|
|
requests = None
|
|
|
|
|
|
# Django-guardian is optional. Import only if guardian is in INSTALLED_APPS
|
|
# Fixes (#1712). We keep the try/except for the test suite.
|
|
guardian = None
|
|
try:
|
|
if 'guardian' in settings.INSTALLED_APPS:
|
|
import guardian
|
|
except ImportError:
|
|
pass
|
|
|
|
|
|
# PATCH method is not implemented by Django
|
|
if 'patch' not in View.http_method_names:
|
|
View.http_method_names = View.http_method_names + ['patch']
|
|
|
|
|
|
# Markdown is optional
|
|
try:
|
|
import markdown
|
|
|
|
if markdown.version <= '2.2':
|
|
HEADERID_EXT_PATH = 'headerid'
|
|
LEVEL_PARAM = 'level'
|
|
elif markdown.version < '2.6':
|
|
HEADERID_EXT_PATH = 'markdown.extensions.headerid'
|
|
LEVEL_PARAM = 'level'
|
|
else:
|
|
HEADERID_EXT_PATH = 'markdown.extensions.toc'
|
|
LEVEL_PARAM = 'baselevel'
|
|
|
|
def apply_markdown(text):
|
|
"""
|
|
Simple wrapper around :func:`markdown.markdown` to set the base level
|
|
of '#' style headers to <h2>.
|
|
"""
|
|
extensions = [HEADERID_EXT_PATH]
|
|
extension_configs = {
|
|
HEADERID_EXT_PATH: {
|
|
LEVEL_PARAM: '2'
|
|
}
|
|
}
|
|
md = markdown.Markdown(
|
|
extensions=extensions, extension_configs=extension_configs
|
|
)
|
|
md_filter_add_syntax_highlight(md)
|
|
return md.convert(text)
|
|
except ImportError:
|
|
apply_markdown = None
|
|
markdown = None
|
|
|
|
|
|
try:
|
|
import pygments
|
|
from pygments.lexers import get_lexer_by_name, TextLexer
|
|
from pygments.formatters import HtmlFormatter
|
|
|
|
def pygments_highlight(text, lang, style):
|
|
lexer = get_lexer_by_name(lang, stripall=False)
|
|
formatter = HtmlFormatter(nowrap=True, style=style)
|
|
return pygments.highlight(text, lexer, formatter)
|
|
|
|
def pygments_css(style):
|
|
formatter = HtmlFormatter(style=style)
|
|
return formatter.get_style_defs('.highlight')
|
|
|
|
except ImportError:
|
|
pygments = None
|
|
|
|
def pygments_highlight(text, lang, style):
|
|
return text
|
|
|
|
def pygments_css(style):
|
|
return None
|
|
|
|
if markdown is not None and pygments is not None:
|
|
# starting from this blogpost and modified to support current markdown extensions API
|
|
# https://zerokspot.com/weblog/2008/06/18/syntax-highlighting-in-markdown-with-pygments/
|
|
|
|
from markdown.preprocessors import Preprocessor
|
|
import re
|
|
|
|
class CodeBlockPreprocessor(Preprocessor):
|
|
pattern = re.compile(
|
|
r'^\s*``` *([^\n]+)\n(.+?)^\s*```', re.M|re.S)
|
|
|
|
formatter = HtmlFormatter()
|
|
|
|
def run(self, lines):
|
|
def repl(m):
|
|
try:
|
|
lexer = get_lexer_by_name(m.group(1))
|
|
except (ValueError, NameError):
|
|
lexer = TextLexer()
|
|
code = m.group(2).replace('\t',' ')
|
|
code = pygments.highlight(code, lexer, self.formatter)
|
|
code = code.replace('\n\n', '\n \n').replace('\n', '<br />').replace('\\@','@')
|
|
return '\n\n%s\n\n' % code
|
|
ret = self.pattern.sub(repl, "\n".join(lines))
|
|
return ret.split("\n")
|
|
|
|
def md_filter_add_syntax_highlight(md):
|
|
md.preprocessors.add('highlight', CodeBlockPreprocessor(), "_begin")
|
|
return True
|
|
else:
|
|
def md_filter_add_syntax_highlight(md):
|
|
return False
|
|
|
|
try:
|
|
import pytz
|
|
from pytz.exceptions import InvalidTimeError
|
|
except ImportError:
|
|
InvalidTimeError = Exception
|
|
|
|
|
|
# `separators` argument to `json.dumps()` differs between 2.x and 3.x
|
|
# See: http://bugs.python.org/issue22767
|
|
if six.PY3:
|
|
SHORT_SEPARATORS = (',', ':')
|
|
LONG_SEPARATORS = (', ', ': ')
|
|
INDENT_SEPARATORS = (',', ': ')
|
|
else:
|
|
SHORT_SEPARATORS = (b',', b':')
|
|
LONG_SEPARATORS = (b', ', b': ')
|
|
INDENT_SEPARATORS = (b',', b': ')
|
|
|
|
|
|
class CustomValidatorMessage(object):
|
|
"""
|
|
We need to avoid evaluation of `lazy` translated `message` in `django.core.validators.BaseValidator.__init__`.
|
|
https://github.com/django/django/blob/75ed5900321d170debef4ac452b8b3cf8a1c2384/django/core/validators.py#L297
|
|
|
|
Ref: https://github.com/encode/django-rest-framework/pull/5452
|
|
"""
|
|
def __init__(self, *args, **kwargs):
|
|
self.message = kwargs.pop('message', self.message)
|
|
super(CustomValidatorMessage, self).__init__(*args, **kwargs)
|
|
|
|
class MinValueValidator(CustomValidatorMessage, DjangoMinValueValidator):
|
|
pass
|
|
|
|
class MaxValueValidator(CustomValidatorMessage, DjangoMaxValueValidator):
|
|
pass
|
|
|
|
class MinLengthValidator(CustomValidatorMessage, DjangoMinLengthValidator):
|
|
pass
|
|
|
|
class MaxLengthValidator(CustomValidatorMessage, DjangoMaxLengthValidator):
|
|
pass
|
|
|
|
def set_rollback():
|
|
if hasattr(transaction, 'set_rollback'):
|
|
if connection.settings_dict.get('ATOMIC_REQUESTS', False):
|
|
# If running in >=1.6 then mark a rollback as required,
|
|
# and allow it to be handled by Django.
|
|
if connection.in_atomic_block:
|
|
transaction.set_rollback(True)
|
|
elif transaction.is_managed():
|
|
# Otherwise handle it explicitly if in managed mode.
|
|
if transaction.is_dirty():
|
|
transaction.rollback()
|
|
transaction.leave_transaction_management()
|
|
else:
|
|
# transaction not managed
|
|
pass
|
|
|
|
|
|
def authenticate(request=None, **credentials):
|
|
from django.contrib.auth import authenticate
|
|
if django.VERSION < (1, 11):
|
|
return authenticate(**credentials)
|
|
else:
|
|
return authenticate(request=request, **credentials)
|
|
|
|
if django.VERSION < (1, 11):
|
|
login = views.login
|
|
login_kwargs = {'template_name': 'rest_framework/login.html'}
|
|
logout = views.logout
|
|
else:
|
|
login = views.LoginView.as_view(template_name='rest_framework/login.html')
|
|
login_kwargs = {}
|
|
logout = views.LogoutView.as_view()
|