from __future__ import unicode_literals from django.conf.urls import url, include from django.core.urlresolvers import RegexURLResolver from rest_framework.settings import api_settings def apply_suffix_patterns(urlpatterns, suffix_pattern, suffix_required): ret = [] for urlpattern in urlpatterns: if isinstance(urlpattern, RegexURLResolver): # Set of included URL patterns regex = urlpattern.regex.pattern namespace = urlpattern.namespace app_name = urlpattern.app_name kwargs = urlpattern.default_kwargs # Add in the included patterns, after applying the suffixes patterns = apply_suffix_patterns(urlpattern.url_patterns, suffix_pattern, suffix_required) ret.append(url(regex, include(patterns, namespace, app_name), kwargs)) else: # Regular URL pattern regex = urlpattern.regex.pattern.rstrip('$') + suffix_pattern view = urlpattern._callback or urlpattern._callback_str kwargs = urlpattern.default_args name = urlpattern.name # Add in both the existing and the new urlpattern if not suffix_required: ret.append(urlpattern) ret.append(url(regex, view, kwargs, name)) return ret def format_suffix_patterns(urlpatterns, suffix_required=False, allowed=None): """ Supplement existing urlpatterns with corresponding patterns that also include a '.format' suffix. Retains urlpattern ordering. urlpatterns: A list of URL patterns. suffix_required: If `True`, only suffixed URLs will be generated, and non-suffixed URLs will not be used. Defaults to `False`. allowed: An optional tuple/list of allowed suffixes. eg ['json', 'api'] Defaults to `None`, which allows any suffix. """ suffix_kwarg = api_settings.FORMAT_SUFFIX_KWARG if allowed: if len(allowed) == 1: allowed_pattern = allowed[0] else: allowed_pattern = '(%s)' % '|'.join(allowed) suffix_pattern = r'\.(?P<%s>%s)$' % (suffix_kwarg, allowed_pattern) else: suffix_pattern = r'\.(?P<%s>[a-z]+)$' % suffix_kwarg return apply_suffix_patterns(urlpatterns, suffix_pattern, suffix_required)