# -*- coding: utf-8 -*- # Unit tests for cache framework # Uses whatever cache backend is set in the test settings file. from __future__ import absolute_import, unicode_literals import hashlib import os import random import re import string import tempfile import time import warnings from django.conf import settings from django.core import management from django.core.cache import get_cache from django.core.cache.backends.base import (CacheKeyWarning, InvalidCacheBackendError) from django.db import router from django.http import (HttpResponse, HttpRequest, StreamingHttpResponse, QueryDict) from django.middleware.cache import (FetchFromCacheMiddleware, UpdateCacheMiddleware, CacheMiddleware) from django.template import Template from django.template.response import TemplateResponse from django.test import TestCase, TransactionTestCase, RequestFactory from django.test.utils import override_settings, six from django.utils import timezone, translation, unittest from django.utils.cache import (patch_vary_headers, get_cache_key, learn_cache_key, patch_cache_control, patch_response_headers) from django.utils.encoding import force_text from django.views.decorators.cache import cache_page from .models import Poll, expensive_calculation # functions/classes for complex data type tests def f(): return 42 class C: def m(n): return 24 class DummyCacheTests(unittest.TestCase): # The Dummy cache backend doesn't really behave like a test backend, # so it has different test requirements. backend_name = 'django.core.cache.backends.dummy.DummyCache' def setUp(self): self.cache = get_cache(self.backend_name) def test_simple(self): "Dummy cache backend ignores cache set calls" self.cache.set("key", "value") self.assertEqual(self.cache.get("key"), None) def test_add(self): "Add doesn't do anything in dummy cache backend" self.cache.add("addkey1", "value") result = self.cache.add("addkey1", "newvalue") self.assertEqual(result, True) self.assertEqual(self.cache.get("addkey1"), None) def test_non_existent(self): "Non-existent keys aren't found in the dummy cache backend" self.assertEqual(self.cache.get("does_not_exist"), None) self.assertEqual(self.cache.get("does_not_exist", "bang!"), "bang!") def test_get_many(self): "get_many returns nothing for the dummy cache backend" self.cache.set('a', 'a') self.cache.set('b', 'b') self.cache.set('c', 'c') self.cache.set('d', 'd') self.assertEqual(self.cache.get_many(['a', 'c', 'd']), {}) self.assertEqual(self.cache.get_many(['a', 'b', 'e']), {}) def test_delete(self): "Cache deletion is transparently ignored on the dummy cache backend" self.cache.set("key1", "spam") self.cache.set("key2", "eggs") self.assertEqual(self.cache.get("key1"), None) self.cache.delete("key1") self.assertEqual(self.cache.get("key1"), None) self.assertEqual(self.cache.get("key2"), None) def test_has_key(self): "The has_key method doesn't ever return True for the dummy cache backend" self.cache.set("hello1", "goodbye1") self.assertEqual(self.cache.has_key("hello1"), False) self.assertEqual(self.cache.has_key("goodbye1"), False) def test_in(self): "The in operator doesn't ever return True for the dummy cache backend" self.cache.set("hello2", "goodbye2") self.assertEqual("hello2" in self.cache, False) self.assertEqual("goodbye2" in self.cache, False) def test_incr(self): "Dummy cache values can't be incremented" self.cache.set('answer', 42) self.assertRaises(ValueError, self.cache.incr, 'answer') self.assertRaises(ValueError, self.cache.incr, 'does_not_exist') def test_decr(self): "Dummy cache values can't be decremented" self.cache.set('answer', 42) self.assertRaises(ValueError, self.cache.decr, 'answer') self.assertRaises(ValueError, self.cache.decr, 'does_not_exist') def test_data_types(self): "All data types are ignored equally by the dummy cache" stuff = { 'string' : 'this is a string', 'int' : 42, 'list' : [1, 2, 3, 4], 'tuple' : (1, 2, 3, 4), 'dict' : {'A': 1, 'B' : 2}, 'function' : f, 'class' : C, } self.cache.set("stuff", stuff) self.assertEqual(self.cache.get("stuff"), None) def test_expiration(self): "Expiration has no effect on the dummy cache" self.cache.set('expire1', 'very quickly', 1) self.cache.set('expire2', 'very quickly', 1) self.cache.set('expire3', 'very quickly', 1) time.sleep(2) self.assertEqual(self.cache.get("expire1"), None) self.cache.add("expire2", "newvalue") self.assertEqual(self.cache.get("expire2"), None) self.assertEqual(self.cache.has_key("expire3"), False) def test_unicode(self): "Unicode values are ignored by the dummy cache" stuff = { 'ascii': 'ascii_value', 'unicode_ascii': 'Iñtërnâtiônàlizætiøn1', 'Iñtërnâtiônàlizætiøn': 'Iñtërnâtiônàlizætiøn2', 'ascii2': {'x' : 1 } } for (key, value) in stuff.items(): self.cache.set(key, value) self.assertEqual(self.cache.get(key), None) def test_set_many(self): "set_many does nothing for the dummy cache backend" self.cache.set_many({'a': 1, 'b': 2}) self.cache.set_many({'a': 1, 'b': 2}, timeout=2, version='1') def test_delete_many(self): "delete_many does nothing for the dummy cache backend" self.cache.delete_many(['a', 'b']) def test_clear(self): "clear does nothing for the dummy cache backend" self.cache.clear() def test_incr_version(self): "Dummy cache versions can't be incremented" self.cache.set('answer', 42) self.assertRaises(ValueError, self.cache.incr_version, 'answer') self.assertRaises(ValueError, self.cache.incr_version, 'does_not_exist') def test_decr_version(self): "Dummy cache versions can't be decremented" self.cache.set('answer', 42) self.assertRaises(ValueError, self.cache.decr_version, 'answer') self.assertRaises(ValueError, self.cache.decr_version, 'does_not_exist') class BaseCacheTests(object): # A common set of tests to apply to all cache backends def _get_request_cache(self, path): request = HttpRequest() request.META = { 'SERVER_NAME': 'testserver', 'SERVER_PORT': 80, } request.path = request.path_info = path request._cache_update_cache = True request.method = 'GET' return request def test_simple(self): # Simple cache set/get works self.cache.set("key", "value") self.assertEqual(self.cache.get("key"), "value") def test_add(self): # A key can be added to a cache self.cache.add("addkey1", "value") result = self.cache.add("addkey1", "newvalue") self.assertEqual(result, False) self.assertEqual(self.cache.get("addkey1"), "value") def test_prefix(self): # Test for same cache key conflicts between shared backend self.cache.set('somekey', 'value') # should not be set in the prefixed cache self.assertFalse(self.prefix_cache.has_key('somekey')) self.prefix_cache.set('somekey', 'value2') self.assertEqual(self.cache.get('somekey'), 'value') self.assertEqual(self.prefix_cache.get('somekey'), 'value2') def test_non_existent(self): # Non-existent cache keys return as None/default # get with non-existent keys self.assertEqual(self.cache.get("does_not_exist"), None) self.assertEqual(self.cache.get("does_not_exist", "bang!"), "bang!") def test_get_many(self): # Multiple cache keys can be returned using get_many self.cache.set('a', 'a') self.cache.set('b', 'b') self.cache.set('c', 'c') self.cache.set('d', 'd') self.assertEqual(self.cache.get_many(['a', 'c', 'd']), {'a' : 'a', 'c' : 'c', 'd' : 'd'}) self.assertEqual(self.cache.get_many(['a', 'b', 'e']), {'a' : 'a', 'b' : 'b'}) def test_delete(self): # Cache keys can be deleted self.cache.set("key1", "spam") self.cache.set("key2", "eggs") self.assertEqual(self.cache.get("key1"), "spam") self.cache.delete("key1") self.assertEqual(self.cache.get("key1"), None) self.assertEqual(self.cache.get("key2"), "eggs") def test_has_key(self): # The cache can be inspected for cache keys self.cache.set("hello1", "goodbye1") self.assertEqual(self.cache.has_key("hello1"), True) self.assertEqual(self.cache.has_key("goodbye1"), False) def test_in(self): # The in operator can be used to inspect cache contents self.cache.set("hello2", "goodbye2") self.assertEqual("hello2" in self.cache, True) self.assertEqual("goodbye2" in self.cache, False) def test_incr(self): # Cache values can be incremented self.cache.set('answer', 41) self.assertEqual(self.cache.incr('answer'), 42) self.assertEqual(self.cache.get('answer'), 42) self.assertEqual(self.cache.incr('answer', 10), 52) self.assertEqual(self.cache.get('answer'), 52) self.assertEqual(self.cache.incr('answer', -10), 42) self.assertRaises(ValueError, self.cache.incr, 'does_not_exist') def test_decr(self): # Cache values can be decremented self.cache.set('answer', 43) self.assertEqual(self.cache.decr('answer'), 42) self.assertEqual(self.cache.get('answer'), 42) self.assertEqual(self.cache.decr('answer', 10), 32) self.assertEqual(self.cache.get('answer'), 32) self.assertEqual(self.cache.decr('answer', -10), 42) self.assertRaises(ValueError, self.cache.decr, 'does_not_exist') def test_data_types(self): # Many different data types can be cached stuff = { 'string' : 'this is a string', 'int' : 42, 'list' : [1, 2, 3, 4], 'tuple' : (1, 2, 3, 4), 'dict' : {'A': 1, 'B' : 2}, 'function' : f, 'class' : C, } self.cache.set("stuff", stuff) self.assertEqual(self.cache.get("stuff"), stuff) def test_cache_read_for_model_instance(self): # Don't want fields with callable as default to be called on cache read expensive_calculation.num_runs = 0 Poll.objects.all().delete() my_poll = Poll.objects.create(question="Well?") self.assertEqual(Poll.objects.count(), 1) pub_date = my_poll.pub_date self.cache.set('question', my_poll) cached_poll = self.cache.get('question') self.assertEqual(cached_poll.pub_date, pub_date) # We only want the default expensive calculation run once self.assertEqual(expensive_calculation.num_runs, 1) def test_cache_write_for_model_instance_with_deferred(self): # Don't want fields with callable as default to be called on cache write expensive_calculation.num_runs = 0 Poll.objects.all().delete() my_poll = Poll.objects.create(question="What?") self.assertEqual(expensive_calculation.num_runs, 1) defer_qs = Poll.objects.all().defer('question') self.assertEqual(defer_qs.count(), 1) self.assertEqual(expensive_calculation.num_runs, 1) self.cache.set('deferred_queryset', defer_qs) # cache set should not re-evaluate default functions self.assertEqual(expensive_calculation.num_runs, 1) def test_cache_read_for_model_instance_with_deferred(self): # Don't want fields with callable as default to be called on cache read expensive_calculation.num_runs = 0 Poll.objects.all().delete() my_poll = Poll.objects.create(question="What?") self.assertEqual(expensive_calculation.num_runs, 1) defer_qs = Poll.objects.all().defer('question') self.assertEqual(defer_qs.count(), 1) self.cache.set('deferred_queryset', defer_qs) self.assertEqual(expensive_calculation.num_runs, 1) runs_before_cache_read = expensive_calculation.num_runs cached_polls = self.cache.get('deferred_queryset') # We only want the default expensive calculation run on creation and set self.assertEqual(expensive_calculation.num_runs, runs_before_cache_read) def test_expiration(self): # Cache values can be set to expire self.cache.set('expire1', 'very quickly', 1) self.cache.set('expire2', 'very quickly', 1) self.cache.set('expire3', 'very quickly', 1) time.sleep(2) self.assertEqual(self.cache.get("expire1"), None) self.cache.add("expire2", "newvalue") self.assertEqual(self.cache.get("expire2"), "newvalue") self.assertEqual(self.cache.has_key("expire3"), False) def test_unicode(self): # Unicode values can be cached stuff = { 'ascii': 'ascii_value', 'unicode_ascii': 'Iñtërnâtiônàlizætiøn1', 'Iñtërnâtiônàlizætiøn': 'Iñtërnâtiônàlizætiøn2', 'ascii2': {'x' : 1 } } # Test `set` for (key, value) in stuff.items(): self.cache.set(key, value) self.assertEqual(self.cache.get(key), value) # Test `add` for (key, value) in stuff.items(): self.cache.delete(key) self.cache.add(key, value) self.assertEqual(self.cache.get(key), value) # Test `set_many` for (key, value) in stuff.items(): self.cache.delete(key) self.cache.set_many(stuff) for (key, value) in stuff.items(): self.assertEqual(self.cache.get(key), value) def test_binary_string(self): # Binary strings should be cacheable from zlib import compress, decompress value = 'value_to_be_compressed' compressed_value = compress(value.encode()) # Test set self.cache.set('binary1', compressed_value) compressed_result = self.cache.get('binary1') self.assertEqual(compressed_value, compressed_result) self.assertEqual(value, decompress(compressed_result).decode()) # Test add self.cache.add('binary1-add', compressed_value) compressed_result = self.cache.get('binary1-add') self.assertEqual(compressed_value, compressed_result) self.assertEqual(value, decompress(compressed_result).decode()) # Test set_many self.cache.set_many({'binary1-set_many': compressed_value}) compressed_result = self.cache.get('binary1-set_many') self.assertEqual(compressed_value, compressed_result) self.assertEqual(value, decompress(compressed_result).decode()) def test_set_many(self): # Multiple keys can be set using set_many self.cache.set_many({"key1": "spam", "key2": "eggs"}) self.assertEqual(self.cache.get("key1"), "spam") self.assertEqual(self.cache.get("key2"), "eggs") def test_set_many_expiration(self): # set_many takes a second ``timeout`` parameter self.cache.set_many({"key1": "spam", "key2": "eggs"}, 1) time.sleep(2) self.assertEqual(self.cache.get("key1"), None) self.assertEqual(self.cache.get("key2"), None) def test_delete_many(self): # Multiple keys can be deleted using delete_many self.cache.set("key1", "spam") self.cache.set("key2", "eggs") self.cache.set("key3", "ham") self.cache.delete_many(["key1", "key2"]) self.assertEqual(self.cache.get("key1"), None) self.assertEqual(self.cache.get("key2"), None) self.assertEqual(self.cache.get("key3"), "ham") def test_clear(self): # The cache can be emptied using clear self.cache.set("key1", "spam") self.cache.set("key2", "eggs") self.cache.clear() self.assertEqual(self.cache.get("key1"), None) self.assertEqual(self.cache.get("key2"), None) def test_long_timeout(self): ''' Using a timeout greater than 30 days makes memcached think it is an absolute expiration timestamp instead of a relative offset. Test that we honour this convention. Refs #12399. ''' self.cache.set('key1', 'eggs', 60*60*24*30 + 1) #30 days + 1 second self.assertEqual(self.cache.get('key1'), 'eggs') self.cache.add('key2', 'ham', 60*60*24*30 + 1) self.assertEqual(self.cache.get('key2'), 'ham') self.cache.set_many({'key3': 'sausage', 'key4': 'lobster bisque'}, 60*60*24*30 + 1) self.assertEqual(self.cache.get('key3'), 'sausage') self.assertEqual(self.cache.get('key4'), 'lobster bisque') def test_float_timeout(self): # Make sure a timeout given as a float doesn't crash anything. self.cache.set("key1", "spam", 100.2) self.assertEqual(self.cache.get("key1"), "spam") def perform_cull_test(self, initial_count, final_count): """This is implemented as a utility method, because only some of the backends implement culling. The culling algorithm also varies slightly, so the final number of entries will vary between backends""" # Create initial cache key entries. This will overflow the cache, causing a cull for i in range(1, initial_count): self.cache.set('cull%d' % i, 'value', 1000) count = 0 # Count how many keys are left in the cache. for i in range(1, initial_count): if self.cache.has_key('cull%d' % i): count = count + 1 self.assertEqual(count, final_count) def test_invalid_keys(self): """ All the builtin backends (except memcached, see below) should warn on keys that would be refused by memcached. This encourages portable caching code without making it too difficult to use production backends with more liberal key rules. Refs #6447. """ # mimic custom ``make_key`` method being defined since the default will # never show the below warnings def func(key, *args): return key old_func = self.cache.key_func self.cache.key_func = func try: with warnings.catch_warnings(record=True) as w: warnings.simplefilter("always") # memcached does not allow whitespace or control characters in keys self.cache.set('key with spaces', 'value') self.assertEqual(len(w), 2) self.assertTrue(isinstance(w[0].message, CacheKeyWarning)) with warnings.catch_warnings(record=True) as w: warnings.simplefilter("always") # memcached limits key length to 250 self.cache.set('a' * 251, 'value') self.assertEqual(len(w), 1) self.assertTrue(isinstance(w[0].message, CacheKeyWarning)) finally: self.cache.key_func = old_func def test_cache_versioning_get_set(self): # set, using default version = 1 self.cache.set('answer1', 42) self.assertEqual(self.cache.get('answer1'), 42) self.assertEqual(self.cache.get('answer1', version=1), 42) self.assertEqual(self.cache.get('answer1', version=2), None) self.assertEqual(self.v2_cache.get('answer1'), None) self.assertEqual(self.v2_cache.get('answer1', version=1), 42) self.assertEqual(self.v2_cache.get('answer1', version=2), None) # set, default version = 1, but manually override version = 2 self.cache.set('answer2', 42, version=2) self.assertEqual(self.cache.get('answer2'), None) self.assertEqual(self.cache.get('answer2', version=1), None) self.assertEqual(self.cache.get('answer2', version=2), 42) self.assertEqual(self.v2_cache.get('answer2'), 42) self.assertEqual(self.v2_cache.get('answer2', version=1), None) self.assertEqual(self.v2_cache.get('answer2', version=2), 42) # v2 set, using default version = 2 self.v2_cache.set('answer3', 42) self.assertEqual(self.cache.get('answer3'), None) self.assertEqual(self.cache.get('answer3', version=1), None) self.assertEqual(self.cache.get('answer3', version=2), 42) self.assertEqual(self.v2_cache.get('answer3'), 42) self.assertEqual(self.v2_cache.get('answer3', version=1), None) self.assertEqual(self.v2_cache.get('answer3', version=2), 42) # v2 set, default version = 2, but manually override version = 1 self.v2_cache.set('answer4', 42, version=1) self.assertEqual(self.cache.get('answer4'), 42) self.assertEqual(self.cache.get('answer4', version=1), 42) self.assertEqual(self.cache.get('answer4', version=2), None) self.assertEqual(self.v2_cache.get('answer4'), None) self.assertEqual(self.v2_cache.get('answer4', version=1), 42) self.assertEqual(self.v2_cache.get('answer4', version=2), None) def test_cache_versioning_add(self): # add, default version = 1, but manually override version = 2 self.cache.add('answer1', 42, version=2) self.assertEqual(self.cache.get('answer1', version=1), None) self.assertEqual(self.cache.get('answer1', version=2), 42) self.cache.add('answer1', 37, version=2) self.assertEqual(self.cache.get('answer1', version=1), None) self.assertEqual(self.cache.get('answer1', version=2), 42) self.cache.add('answer1', 37, version=1) self.assertEqual(self.cache.get('answer1', version=1), 37) self.assertEqual(self.cache.get('answer1', version=2), 42) # v2 add, using default version = 2 self.v2_cache.add('answer2', 42) self.assertEqual(self.cache.get('answer2', version=1), None) self.assertEqual(self.cache.get('answer2', version=2), 42) self.v2_cache.add('answer2', 37) self.assertEqual(self.cache.get('answer2', version=1), None) self.assertEqual(self.cache.get('answer2', version=2), 42) self.v2_cache.add('answer2', 37, version=1) self.assertEqual(self.cache.get('answer2', version=1), 37) self.assertEqual(self.cache.get('answer2', version=2), 42) # v2 add, default version = 2, but manually override version = 1 self.v2_cache.add('answer3', 42, version=1) self.assertEqual(self.cache.get('answer3', version=1), 42) self.assertEqual(self.cache.get('answer3', version=2), None) self.v2_cache.add('answer3', 37, version=1) self.assertEqual(self.cache.get('answer3', version=1), 42) self.assertEqual(self.cache.get('answer3', version=2), None) self.v2_cache.add('answer3', 37) self.assertEqual(self.cache.get('answer3', version=1), 42) self.assertEqual(self.cache.get('answer3', version=2), 37) def test_cache_versioning_has_key(self): self.cache.set('answer1', 42) # has_key self.assertTrue(self.cache.has_key('answer1')) self.assertTrue(self.cache.has_key('answer1', version=1)) self.assertFalse(self.cache.has_key('answer1', version=2)) self.assertFalse(self.v2_cache.has_key('answer1')) self.assertTrue(self.v2_cache.has_key('answer1', version=1)) self.assertFalse(self.v2_cache.has_key('answer1', version=2)) def test_cache_versioning_delete(self): self.cache.set('answer1', 37, version=1) self.cache.set('answer1', 42, version=2) self.cache.delete('answer1') self.assertEqual(self.cache.get('answer1', version=1), None) self.assertEqual(self.cache.get('answer1', version=2), 42) self.cache.set('answer2', 37, version=1) self.cache.set('answer2', 42, version=2) self.cache.delete('answer2', version=2) self.assertEqual(self.cache.get('answer2', version=1), 37) self.assertEqual(self.cache.get('answer2', version=2), None) self.cache.set('answer3', 37, version=1) self.cache.set('answer3', 42, version=2) self.v2_cache.delete('answer3') self.assertEqual(self.cache.get('answer3', version=1), 37) self.assertEqual(self.cache.get('answer3', version=2), None) self.cache.set('answer4', 37, version=1) self.cache.set('answer4', 42, version=2) self.v2_cache.delete('answer4', version=1) self.assertEqual(self.cache.get('answer4', version=1), None) self.assertEqual(self.cache.get('answer4', version=2), 42) def test_cache_versioning_incr_decr(self): self.cache.set('answer1', 37, version=1) self.cache.set('answer1', 42, version=2) self.cache.incr('answer1') self.assertEqual(self.cache.get('answer1', version=1), 38) self.assertEqual(self.cache.get('answer1', version=2), 42) self.cache.decr('answer1') self.assertEqual(self.cache.get('answer1', version=1), 37) self.assertEqual(self.cache.get('answer1', version=2), 42) self.cache.set('answer2', 37, version=1) self.cache.set('answer2', 42, version=2) self.cache.incr('answer2', version=2) self.assertEqual(self.cache.get('answer2', version=1), 37) self.assertEqual(self.cache.get('answer2', version=2), 43) self.cache.decr('answer2', version=2) self.assertEqual(self.cache.get('answer2', version=1), 37) self.assertEqual(self.cache.get('answer2', version=2), 42) self.cache.set('answer3', 37, version=1) self.cache.set('answer3', 42, version=2) self.v2_cache.incr('answer3') self.assertEqual(self.cache.get('answer3', version=1), 37) self.assertEqual(self.cache.get('answer3', version=2), 43) self.v2_cache.decr('answer3') self.assertEqual(self.cache.get('answer3', version=1), 37) self.assertEqual(self.cache.get('answer3', version=2), 42) self.cache.set('answer4', 37, version=1) self.cache.set('answer4', 42, version=2) self.v2_cache.incr('answer4', version=1) self.assertEqual(self.cache.get('answer4', version=1), 38) self.assertEqual(self.cache.get('answer4', version=2), 42) self.v2_cache.decr('answer4', version=1) self.assertEqual(self.cache.get('answer4', version=1), 37) self.assertEqual(self.cache.get('answer4', version=2), 42) def test_cache_versioning_get_set_many(self): # set, using default version = 1 self.cache.set_many({'ford1': 37, 'arthur1': 42}) self.assertEqual(self.cache.get_many(['ford1','arthur1']), {'ford1': 37, 'arthur1': 42}) self.assertEqual(self.cache.get_many(['ford1','arthur1'], version=1), {'ford1': 37, 'arthur1': 42}) self.assertEqual(self.cache.get_many(['ford1','arthur1'], version=2), {}) self.assertEqual(self.v2_cache.get_many(['ford1','arthur1']), {}) self.assertEqual(self.v2_cache.get_many(['ford1','arthur1'], version=1), {'ford1': 37, 'arthur1': 42}) self.assertEqual(self.v2_cache.get_many(['ford1','arthur1'], version=2), {}) # set, default version = 1, but manually override version = 2 self.cache.set_many({'ford2': 37, 'arthur2': 42}, version=2) self.assertEqual(self.cache.get_many(['ford2','arthur2']), {}) self.assertEqual(self.cache.get_many(['ford2','arthur2'], version=1), {}) self.assertEqual(self.cache.get_many(['ford2','arthur2'], version=2), {'ford2': 37, 'arthur2': 42}) self.assertEqual(self.v2_cache.get_many(['ford2','arthur2']), {'ford2': 37, 'arthur2': 42}) self.assertEqual(self.v2_cache.get_many(['ford2','arthur2'], version=1), {}) self.assertEqual(self.v2_cache.get_many(['ford2','arthur2'], version=2), {'ford2': 37, 'arthur2': 42}) # v2 set, using default version = 2 self.v2_cache.set_many({'ford3': 37, 'arthur3': 42}) self.assertEqual(self.cache.get_many(['ford3','arthur3']), {}) self.assertEqual(self.cache.get_many(['ford3','arthur3'], version=1), {}) self.assertEqual(self.cache.get_many(['ford3','arthur3'], version=2), {'ford3': 37, 'arthur3': 42}) self.assertEqual(self.v2_cache.get_many(['ford3','arthur3']), {'ford3': 37, 'arthur3': 42}) self.assertEqual(self.v2_cache.get_many(['ford3','arthur3'], version=1), {}) self.assertEqual(self.v2_cache.get_many(['ford3','arthur3'], version=2), {'ford3': 37, 'arthur3': 42}) # v2 set, default version = 2, but manually override version = 1 self.v2_cache.set_many({'ford4': 37, 'arthur4': 42}, version=1) self.assertEqual(self.cache.get_many(['ford4','arthur4']), {'ford4': 37, 'arthur4': 42}) self.assertEqual(self.cache.get_many(['ford4','arthur4'], version=1), {'ford4': 37, 'arthur4': 42}) self.assertEqual(self.cache.get_many(['ford4','arthur4'], version=2), {}) self.assertEqual(self.v2_cache.get_many(['ford4','arthur4']), {}) self.assertEqual(self.v2_cache.get_many(['ford4','arthur4'], version=1), {'ford4': 37, 'arthur4': 42}) self.assertEqual(self.v2_cache.get_many(['ford4','arthur4'], version=2), {}) def test_incr_version(self): self.cache.set('answer', 42, version=2) self.assertEqual(self.cache.get('answer'), None) self.assertEqual(self.cache.get('answer', version=1), None) self.assertEqual(self.cache.get('answer', version=2), 42) self.assertEqual(self.cache.get('answer', version=3), None) self.assertEqual(self.cache.incr_version('answer', version=2), 3) self.assertEqual(self.cache.get('answer'), None) self.assertEqual(self.cache.get('answer', version=1), None) self.assertEqual(self.cache.get('answer', version=2), None) self.assertEqual(self.cache.get('answer', version=3), 42) self.v2_cache.set('answer2', 42) self.assertEqual(self.v2_cache.get('answer2'), 42) self.assertEqual(self.v2_cache.get('answer2', version=1), None) self.assertEqual(self.v2_cache.get('answer2', version=2), 42) self.assertEqual(self.v2_cache.get('answer2', version=3), None) self.assertEqual(self.v2_cache.incr_version('answer2'), 3) self.assertEqual(self.v2_cache.get('answer2'), None) self.assertEqual(self.v2_cache.get('answer2', version=1), None) self.assertEqual(self.v2_cache.get('answer2', version=2), None) self.assertEqual(self.v2_cache.get('answer2', version=3), 42) self.assertRaises(ValueError, self.cache.incr_version, 'does_not_exist') def test_decr_version(self): self.cache.set('answer', 42, version=2) self.assertEqual(self.cache.get('answer'), None) self.assertEqual(self.cache.get('answer', version=1), None) self.assertEqual(self.cache.get('answer', version=2), 42) self.assertEqual(self.cache.decr_version('answer', version=2), 1) self.assertEqual(self.cache.get('answer'), 42) self.assertEqual(self.cache.get('answer', version=1), 42) self.assertEqual(self.cache.get('answer', version=2), None) self.v2_cache.set('answer2', 42) self.assertEqual(self.v2_cache.get('answer2'), 42) self.assertEqual(self.v2_cache.get('answer2', version=1), None) self.assertEqual(self.v2_cache.get('answer2', version=2), 42) self.assertEqual(self.v2_cache.decr_version('answer2'), 1) self.assertEqual(self.v2_cache.get('answer2'), None) self.assertEqual(self.v2_cache.get('answer2', version=1), 42) self.assertEqual(self.v2_cache.get('answer2', version=2), None) self.assertRaises(ValueError, self.cache.decr_version, 'does_not_exist', version=2) def test_custom_key_func(self): # Two caches with different key functions aren't visible to each other self.cache.set('answer1', 42) self.assertEqual(self.cache.get('answer1'), 42) self.assertEqual(self.custom_key_cache.get('answer1'), None) self.assertEqual(self.custom_key_cache2.get('answer1'), None) self.custom_key_cache.set('answer2', 42) self.assertEqual(self.cache.get('answer2'), None) self.assertEqual(self.custom_key_cache.get('answer2'), 42) self.assertEqual(self.custom_key_cache2.get('answer2'), 42) def test_cache_write_unpickable_object(self): update_middleware = UpdateCacheMiddleware() update_middleware.cache = self.cache fetch_middleware = FetchFromCacheMiddleware() fetch_middleware.cache = self.cache request = self._get_request_cache('/cache/test') get_cache_data = FetchFromCacheMiddleware().process_request(request) self.assertEqual(get_cache_data, None) response = HttpResponse() content = 'Testing cookie serialization.' response.content = content response.set_cookie('foo', 'bar') update_middleware.process_response(request, response) get_cache_data = fetch_middleware.process_request(request) self.assertNotEqual(get_cache_data, None) self.assertEqual(get_cache_data.content, content.encode('utf-8')) self.assertEqual(get_cache_data.cookies, response.cookies) update_middleware.process_response(request, get_cache_data) get_cache_data = fetch_middleware.process_request(request) self.assertNotEqual(get_cache_data, None) self.assertEqual(get_cache_data.content, content.encode('utf-8')) self.assertEqual(get_cache_data.cookies, response.cookies) def custom_key_func(key, key_prefix, version): "A customized cache key function" return 'CUSTOM-' + '-'.join([key_prefix, str(version), key]) class DBCacheTests(BaseCacheTests, TransactionTestCase): backend_name = 'django.core.cache.backends.db.DatabaseCache' def setUp(self): # Spaces are used in the table name to ensure quoting/escaping is working self._table_name = 'test cache table' management.call_command('createcachetable', self._table_name, verbosity=0, interactive=False) self.cache = get_cache(self.backend_name, LOCATION=self._table_name, OPTIONS={'MAX_ENTRIES': 30}) self.prefix_cache = get_cache(self.backend_name, LOCATION=self._table_name, KEY_PREFIX='cacheprefix') self.v2_cache = get_cache(self.backend_name, LOCATION=self._table_name, VERSION=2) self.custom_key_cache = get_cache(self.backend_name, LOCATION=self._table_name, KEY_FUNCTION=custom_key_func) self.custom_key_cache2 = get_cache(self.backend_name, LOCATION=self._table_name, KEY_FUNCTION='regressiontests.cache.tests.custom_key_func') def tearDown(self): from django.db import connection cursor = connection.cursor() cursor.execute('DROP TABLE %s' % connection.ops.quote_name(self._table_name)) connection.commit() def test_cull(self): self.perform_cull_test(50, 29) def test_zero_cull(self): self.cache = get_cache(self.backend_name, LOCATION=self._table_name, OPTIONS={'MAX_ENTRIES': 30, 'CULL_FREQUENCY': 0}) self.perform_cull_test(50, 18) def test_old_initialization(self): self.cache = get_cache('db://%s?max_entries=30&cull_frequency=0' % self._table_name) self.perform_cull_test(50, 18) def test_second_call_doesnt_crash(self): with six.assertRaisesRegex(self, management.CommandError, "Cache table 'test cache table' could not be created"): management.call_command( 'createcachetable', self._table_name, verbosity=0, interactive=False ) @override_settings(USE_TZ=True) class DBCacheWithTimeZoneTests(DBCacheTests): pass class DBCacheRouter(object): """A router that puts the cache table on the 'other' database.""" def db_for_read(self, model, **hints): if model._meta.app_label == 'django_cache': return 'other' def db_for_write(self, model, **hints): if model._meta.app_label == 'django_cache': return 'other' def allow_syncdb(self, db, model): if model._meta.app_label == 'django_cache': return db == 'other' class CreateCacheTableForDBCacheTests(TestCase): multi_db = True def test_createcachetable_observes_database_router(self): old_routers = router.routers try: router.routers = [DBCacheRouter()] # cache table should not be created on 'default' with self.assertNumQueries(0, using='default'): management.call_command('createcachetable', 'cache_table', database='default', verbosity=0, interactive=False) # cache table should be created on 'other' # one query is used to create the table and another one the index with self.assertNumQueries(2, using='other'): management.call_command('createcachetable', 'cache_table', database='other', verbosity=0, interactive=False) finally: router.routers = old_routers class LocMemCacheTests(unittest.TestCase, BaseCacheTests): backend_name = 'django.core.cache.backends.locmem.LocMemCache' def setUp(self): self.cache = get_cache(self.backend_name, OPTIONS={'MAX_ENTRIES': 30}) self.prefix_cache = get_cache(self.backend_name, KEY_PREFIX='cacheprefix') self.v2_cache = get_cache(self.backend_name, VERSION=2) self.custom_key_cache = get_cache(self.backend_name, OPTIONS={'MAX_ENTRIES': 30}, KEY_FUNCTION=custom_key_func) self.custom_key_cache2 = get_cache(self.backend_name, OPTIONS={'MAX_ENTRIES': 30}, KEY_FUNCTION='regressiontests.cache.tests.custom_key_func') # LocMem requires a hack to make the other caches # share a data store with the 'normal' cache. self.prefix_cache._cache = self.cache._cache self.prefix_cache._expire_info = self.cache._expire_info self.v2_cache._cache = self.cache._cache self.v2_cache._expire_info = self.cache._expire_info self.custom_key_cache._cache = self.cache._cache self.custom_key_cache._expire_info = self.cache._expire_info self.custom_key_cache2._cache = self.cache._cache self.custom_key_cache2._expire_info = self.cache._expire_info def tearDown(self): self.cache.clear() def test_cull(self): self.perform_cull_test(50, 29) def test_zero_cull(self): self.cache = get_cache(self.backend_name, OPTIONS={'MAX_ENTRIES': 30, 'CULL_FREQUENCY': 0}) self.perform_cull_test(50, 19) def test_old_initialization(self): self.cache = get_cache('locmem://?max_entries=30&cull_frequency=0') self.perform_cull_test(50, 19) def test_multiple_caches(self): "Check that multiple locmem caches are isolated" mirror_cache = get_cache(self.backend_name) other_cache = get_cache(self.backend_name, LOCATION='other') self.cache.set('value1', 42) self.assertEqual(mirror_cache.get('value1'), 42) self.assertEqual(other_cache.get('value1'), None) def test_incr_decr_timeout(self): """incr/decr does not modify expiry time (matches memcached behavior)""" key = 'value' _key = self.cache.make_key(key) self.cache.set(key, 1, timeout=self.cache.default_timeout*10) expire = self.cache._expire_info[_key] self.cache.incr(key) self.assertEqual(expire, self.cache._expire_info[_key]) self.cache.decr(key) self.assertEqual(expire, self.cache._expire_info[_key]) # memcached backend isn't guaranteed to be available. # To check the memcached backend, the test settings file will # need to contain at least one cache backend setting that points at # your memcache server. @unittest.skipUnless( any(cache['BACKEND'].startswith('django.core.cache.backends.memcached.') for cache in settings.CACHES.values()), "memcached not available") class MemcachedCacheTests(unittest.TestCase, BaseCacheTests): def setUp(self): for cache_key, cache in settings.CACHES.items(): if cache['BACKEND'].startswith('django.core.cache.backends.memcached.'): break random_prefix = ''.join(random.choice(string.ascii_letters) for x in range(10)) self.cache = get_cache(cache_key) self.prefix_cache = get_cache(cache_key, KEY_PREFIX=random_prefix) self.v2_cache = get_cache(cache_key, VERSION=2) self.custom_key_cache = get_cache(cache_key, KEY_FUNCTION=custom_key_func) self.custom_key_cache2 = get_cache(cache_key, KEY_FUNCTION='regressiontests.cache.tests.custom_key_func') def tearDown(self): self.cache.clear() def test_invalid_keys(self): """ On memcached, we don't introduce a duplicate key validation step (for speed reasons), we just let the memcached API library raise its own exception on bad keys. Refs #6447. In order to be memcached-API-library agnostic, we only assert that a generic exception of some kind is raised. """ # memcached does not allow whitespace or control characters in keys self.assertRaises(Exception, self.cache.set, 'key with spaces', 'value') # memcached limits key length to 250 self.assertRaises(Exception, self.cache.set, 'a' * 251, 'value') class FileBasedCacheTests(unittest.TestCase, BaseCacheTests): """ Specific test cases for the file-based cache. """ backend_name = 'django.core.cache.backends.filebased.FileBasedCache' def setUp(self): self.dirname = tempfile.mkdtemp() self.cache = get_cache(self.backend_name, LOCATION=self.dirname, OPTIONS={'MAX_ENTRIES': 30}) self.prefix_cache = get_cache(self.backend_name, LOCATION=self.dirname, KEY_PREFIX='cacheprefix') self.v2_cache = get_cache(self.backend_name, LOCATION=self.dirname, VERSION=2) self.custom_key_cache = get_cache(self.backend_name, LOCATION=self.dirname, KEY_FUNCTION=custom_key_func) self.custom_key_cache2 = get_cache(self.backend_name, LOCATION=self.dirname, KEY_FUNCTION='regressiontests.cache.tests.custom_key_func') def tearDown(self): self.cache.clear() def test_hashing(self): """Test that keys are hashed into subdirectories correctly""" self.cache.set("foo", "bar") key = self.cache.make_key("foo") keyhash = hashlib.md5(key.encode()).hexdigest() keypath = os.path.join(self.dirname, keyhash[:2], keyhash[2:4], keyhash[4:]) self.assertTrue(os.path.exists(keypath)) def test_subdirectory_removal(self): """ Make sure that the created subdirectories are correctly removed when empty. """ self.cache.set("foo", "bar") key = self.cache.make_key("foo") keyhash = hashlib.md5(key.encode()).hexdigest() keypath = os.path.join(self.dirname, keyhash[:2], keyhash[2:4], keyhash[4:]) self.assertTrue(os.path.exists(keypath)) self.cache.delete("foo") self.assertTrue(not os.path.exists(keypath)) self.assertTrue(not os.path.exists(os.path.dirname(keypath))) self.assertTrue(not os.path.exists(os.path.dirname(os.path.dirname(keypath)))) def test_cull(self): self.perform_cull_test(50, 29) def test_old_initialization(self): self.cache = get_cache('file://%s?max_entries=30' % self.dirname) self.perform_cull_test(50, 29) class CustomCacheKeyValidationTests(unittest.TestCase): """ Tests for the ability to mixin a custom ``validate_key`` method to a custom cache backend that otherwise inherits from a builtin backend, and override the default key validation. Refs #6447. """ def test_custom_key_validation(self): cache = get_cache('regressiontests.cache.liberal_backend://') # this key is both longer than 250 characters, and has spaces key = 'some key with spaces' * 15 val = 'a value' cache.set(key, val) self.assertEqual(cache.get(key), val) class GetCacheTests(unittest.TestCase): def test_simple(self): cache = get_cache('locmem://') from django.core.cache.backends.locmem import LocMemCache self.assertTrue(isinstance(cache, LocMemCache)) from django.core.cache import cache self.assertTrue(isinstance(cache, get_cache('default').__class__)) cache = get_cache( 'django.core.cache.backends.dummy.DummyCache', **{'TIMEOUT': 120}) self.assertEqual(cache.default_timeout, 120) self.assertRaises(InvalidCacheBackendError, get_cache, 'does_not_exist') def test_close(self): from django.core import signals cache = get_cache('regressiontests.cache.closeable_cache.CacheClass') self.assertFalse(cache.closed) signals.request_finished.send(self.__class__) self.assertTrue(cache.closed) @override_settings( CACHE_MIDDLEWARE_KEY_PREFIX='settingsprefix', CACHE_MIDDLEWARE_SECONDS=1, CACHES={ 'default': { 'BACKEND': 'django.core.cache.backends.locmem.LocMemCache', }, }, USE_I18N=False, ) class CacheUtils(TestCase): """TestCase for django.utils.cache functions.""" def setUp(self): self.path = '/cache/test/' self.cache = get_cache('default') def tearDown(self): self.cache.clear() def _get_request(self, path, method='GET'): request = HttpRequest() request.META = { 'SERVER_NAME': 'testserver', 'SERVER_PORT': 80, } request.method = method request.path = request.path_info = "/cache/%s" % path return request def test_patch_vary_headers(self): headers = ( # Initial vary, new headers, resulting vary. (None, ('Accept-Encoding',), 'Accept-Encoding'), ('Accept-Encoding', ('accept-encoding',), 'Accept-Encoding'), ('Accept-Encoding', ('ACCEPT-ENCODING',), 'Accept-Encoding'), ('Cookie', ('Accept-Encoding',), 'Cookie, Accept-Encoding'), ('Cookie, Accept-Encoding', ('Accept-Encoding',), 'Cookie, Accept-Encoding'), ('Cookie, Accept-Encoding', ('Accept-Encoding', 'cookie'), 'Cookie, Accept-Encoding'), (None, ('Accept-Encoding', 'COOKIE'), 'Accept-Encoding, COOKIE'), ('Cookie, Accept-Encoding', ('Accept-Encoding', 'cookie'), 'Cookie, Accept-Encoding'), ('Cookie , Accept-Encoding', ('Accept-Encoding', 'cookie'), 'Cookie, Accept-Encoding'), ) for initial_vary, newheaders, resulting_vary in headers: response = HttpResponse() if initial_vary is not None: response['Vary'] = initial_vary patch_vary_headers(response, newheaders) self.assertEqual(response['Vary'], resulting_vary) def test_get_cache_key(self): request = self._get_request(self.path) response = HttpResponse() key_prefix = 'localprefix' # Expect None if no headers have been set yet. self.assertEqual(get_cache_key(request), None) # Set headers to an empty list. learn_cache_key(request, response) self.assertEqual(get_cache_key(request), 'views.decorators.cache.cache_page.settingsprefix.GET.a8c87a3d8c44853d7f79474f7ffe4ad5.d41d8cd98f00b204e9800998ecf8427e') # Verify that a specified key_prefix is taken into account. learn_cache_key(request, response, key_prefix=key_prefix) self.assertEqual(get_cache_key(request, key_prefix=key_prefix), 'views.decorators.cache.cache_page.localprefix.GET.a8c87a3d8c44853d7f79474f7ffe4ad5.d41d8cd98f00b204e9800998ecf8427e') def test_get_cache_key_with_query(self): request = self._get_request(self.path + '?test=1') response = HttpResponse() # Expect None if no headers have been set yet. self.assertEqual(get_cache_key(request), None) # Set headers to an empty list. learn_cache_key(request, response) # Verify that the querystring is taken into account. self.assertEqual(get_cache_key(request), 'views.decorators.cache.cache_page.settingsprefix.GET.bd889c5a59603af44333ed21504db3cd.d41d8cd98f00b204e9800998ecf8427e') def test_learn_cache_key(self): request = self._get_request(self.path, 'HEAD') response = HttpResponse() response['Vary'] = 'Pony' # Make sure that the Vary header is added to the key hash learn_cache_key(request, response) self.assertEqual(get_cache_key(request), 'views.decorators.cache.cache_page.settingsprefix.GET.a8c87a3d8c44853d7f79474f7ffe4ad5.d41d8cd98f00b204e9800998ecf8427e') def test_patch_cache_control(self): tests = ( # Initial Cache-Control, kwargs to patch_cache_control, expected Cache-Control parts (None, {'private' : True}, set(['private'])), # Test whether private/public attributes are mutually exclusive ('private', {'private' : True}, set(['private'])), ('private', {'public' : True}, set(['public'])), ('public', {'public' : True}, set(['public'])), ('public', {'private' : True}, set(['private'])), ('must-revalidate,max-age=60,private', {'public' : True}, set(['must-revalidate', 'max-age=60', 'public'])), ('must-revalidate,max-age=60,public', {'private' : True}, set(['must-revalidate', 'max-age=60', 'private'])), ('must-revalidate,max-age=60', {'public' : True}, set(['must-revalidate', 'max-age=60', 'public'])), ) cc_delim_re = re.compile(r'\s*,\s*') for initial_cc, newheaders, expected_cc in tests: response = HttpResponse() if initial_cc is not None: response['Cache-Control'] = initial_cc patch_cache_control(response, **newheaders) parts = set(cc_delim_re.split(response['Cache-Control'])) self.assertEqual(parts, expected_cc) @override_settings( CACHES={ 'default': { 'BACKEND': 'django.core.cache.backends.locmem.LocMemCache', 'KEY_PREFIX': 'cacheprefix', }, }, ) class PrefixedCacheUtils(CacheUtils): pass @override_settings( CACHE_MIDDLEWARE_SECONDS=60, CACHE_MIDDLEWARE_KEY_PREFIX='test', CACHES={ 'default': { 'BACKEND': 'django.core.cache.backends.locmem.LocMemCache', }, }, ) class CacheHEADTest(TestCase): def setUp(self): self.path = '/cache/test/' self.cache = get_cache('default') def tearDown(self): self.cache.clear() def _get_request(self, method): request = HttpRequest() request.META = { 'SERVER_NAME': 'testserver', 'SERVER_PORT': 80, } request.method = method request.path = request.path_info = self.path return request def _get_request_cache(self, method): request = self._get_request(method) request._cache_update_cache = True return request def _set_cache(self, request, msg): response = HttpResponse() response.content = msg return UpdateCacheMiddleware().process_response(request, response) def test_head_caches_correctly(self): test_content = 'test content' request = self._get_request_cache('HEAD') self._set_cache(request, test_content) request = self._get_request('HEAD') get_cache_data = FetchFromCacheMiddleware().process_request(request) self.assertNotEqual(get_cache_data, None) self.assertEqual(test_content.encode(), get_cache_data.content) def test_head_with_cached_get(self): test_content = 'test content' request = self._get_request_cache('GET') self._set_cache(request, test_content) request = self._get_request('HEAD') get_cache_data = FetchFromCacheMiddleware().process_request(request) self.assertNotEqual(get_cache_data, None) self.assertEqual(test_content.encode(), get_cache_data.content) @override_settings( CACHE_MIDDLEWARE_KEY_PREFIX='settingsprefix', CACHES={ 'default': { 'BACKEND': 'django.core.cache.backends.locmem.LocMemCache', }, }, LANGUAGES=( ('en', 'English'), ('es', 'Spanish'), ), ) class CacheI18nTest(TestCase): def setUp(self): self.path = '/cache/test/' self.cache = get_cache('default') def tearDown(self): self.cache.clear() def _get_request(self, method='GET'): request = HttpRequest() request.META = { 'SERVER_NAME': 'testserver', 'SERVER_PORT': 80, } request.method = method request.path = request.path_info = self.path return request def _get_request_cache(self, query_string=None): request = HttpRequest() request.META = { 'SERVER_NAME': 'testserver', 'SERVER_PORT': 80, } if query_string: request.META['QUERY_STRING'] = query_string request.GET = QueryDict(query_string) request.path = request.path_info = self.path request._cache_update_cache = True request.method = 'GET' request.session = {} return request @override_settings(USE_I18N=True, USE_L10N=False, USE_TZ=False) def test_cache_key_i18n_translation(self): request = self._get_request() lang = translation.get_language() response = HttpResponse() key = learn_cache_key(request, response) self.assertIn(lang, key, "Cache keys should include the language name when translation is active") key2 = get_cache_key(request) self.assertEqual(key, key2) @override_settings(USE_I18N=False, USE_L10N=True, USE_TZ=False) def test_cache_key_i18n_formatting(self): request = self._get_request() lang = translation.get_language() response = HttpResponse() key = learn_cache_key(request, response) self.assertIn(lang, key, "Cache keys should include the language name when formatting is active") key2 = get_cache_key(request) self.assertEqual(key, key2) @override_settings(USE_I18N=False, USE_L10N=False, USE_TZ=True) def test_cache_key_i18n_timezone(self): request = self._get_request() # This is tightly coupled to the implementation, # but it's the most straightforward way to test the key. tz = force_text(timezone.get_current_timezone_name(), errors='ignore') tz = tz.encode('ascii', 'ignore').decode('ascii').replace(' ', '_') response = HttpResponse() key = learn_cache_key(request, response) self.assertIn(tz, key, "Cache keys should include the time zone name when time zones are active") key2 = get_cache_key(request) self.assertEqual(key, key2) @override_settings(USE_I18N=False, USE_L10N=False) def test_cache_key_no_i18n (self): request = self._get_request() lang = translation.get_language() tz = force_text(timezone.get_current_timezone_name(), errors='ignore') tz = tz.encode('ascii', 'ignore').decode('ascii').replace(' ', '_') response = HttpResponse() key = learn_cache_key(request, response) self.assertNotIn(lang, key, "Cache keys shouldn't include the language name when i18n isn't active") self.assertNotIn(tz, key, "Cache keys shouldn't include the time zone name when i18n isn't active") @override_settings(USE_I18N=False, USE_L10N=False, USE_TZ=True) def test_cache_key_with_non_ascii_tzname(self): # Regression test for #17476 class CustomTzName(timezone.UTC): name = '' def tzname(self, dt): return self.name request = self._get_request() response = HttpResponse() with timezone.override(CustomTzName()): CustomTzName.name = 'Hora estándar de Argentina'.encode('UTF-8') # UTF-8 string sanitized_name = 'Hora_estndar_de_Argentina' self.assertIn(sanitized_name, learn_cache_key(request, response), "Cache keys should include the time zone name when time zones are active") CustomTzName.name = 'Hora estándar de Argentina' # unicode sanitized_name = 'Hora_estndar_de_Argentina' self.assertIn(sanitized_name, learn_cache_key(request, response), "Cache keys should include the time zone name when time zones are active") @override_settings( CACHE_MIDDLEWARE_KEY_PREFIX="test", CACHE_MIDDLEWARE_SECONDS=60, USE_ETAGS=True, USE_I18N=True, ) def test_middleware(self): def set_cache(request, lang, msg): translation.activate(lang) response = HttpResponse() response.content = msg return UpdateCacheMiddleware().process_response(request, response) # cache with non empty request.GET request = self._get_request_cache(query_string='foo=bar&other=true') get_cache_data = FetchFromCacheMiddleware().process_request(request) # first access, cache must return None self.assertEqual(get_cache_data, None) response = HttpResponse() content = 'Check for cache with QUERY_STRING' response.content = content UpdateCacheMiddleware().process_response(request, response) get_cache_data = FetchFromCacheMiddleware().process_request(request) # cache must return content self.assertNotEqual(get_cache_data, None) self.assertEqual(get_cache_data.content, content.encode()) # different QUERY_STRING, cache must be empty request = self._get_request_cache(query_string='foo=bar&somethingelse=true') get_cache_data = FetchFromCacheMiddleware().process_request(request) self.assertEqual(get_cache_data, None) # i18n tests en_message ="Hello world!" es_message ="Hola mundo!" request = self._get_request_cache() set_cache(request, 'en', en_message) get_cache_data = FetchFromCacheMiddleware().process_request(request) # Check that we can recover the cache self.assertNotEqual(get_cache_data, None) self.assertEqual(get_cache_data.content, en_message.encode()) # Check that we use etags self.assertTrue(get_cache_data.has_header('ETag')) # Check that we can disable etags with self.settings(USE_ETAGS=False): request._cache_update_cache = True set_cache(request, 'en', en_message) get_cache_data = FetchFromCacheMiddleware().process_request(request) self.assertFalse(get_cache_data.has_header('ETag')) # change the session language and set content request = self._get_request_cache() set_cache(request, 'es', es_message) # change again the language translation.activate('en') # retrieve the content from cache get_cache_data = FetchFromCacheMiddleware().process_request(request) self.assertEqual(get_cache_data.content, en_message.encode()) # change again the language translation.activate('es') get_cache_data = FetchFromCacheMiddleware().process_request(request) self.assertEqual(get_cache_data.content, es_message.encode()) # reset the language translation.deactivate() @override_settings( CACHE_MIDDLEWARE_KEY_PREFIX="test", CACHE_MIDDLEWARE_SECONDS=60, USE_ETAGS=True, ) def test_middleware_doesnt_cache_streaming_response(self): request = self._get_request() get_cache_data = FetchFromCacheMiddleware().process_request(request) self.assertIsNone(get_cache_data) # This test passes on Python < 3.3 even without the corresponding code # in UpdateCacheMiddleware, because pickling a StreamingHttpResponse # fails (http://bugs.python.org/issue14288). LocMemCache silently # swallows the exception and doesn't store the response in cache. content = ['Check for cache with streaming content.'] response = StreamingHttpResponse(content) UpdateCacheMiddleware().process_response(request, response) get_cache_data = FetchFromCacheMiddleware().process_request(request) self.assertIsNone(get_cache_data) @override_settings( CACHES={ 'default': { 'BACKEND': 'django.core.cache.backends.locmem.LocMemCache', 'KEY_PREFIX': 'cacheprefix' }, }, ) class PrefixedCacheI18nTest(CacheI18nTest): pass def hello_world_view(request, value): return HttpResponse('Hello World %s' % value) @override_settings( CACHE_MIDDLEWARE_ALIAS='other', CACHE_MIDDLEWARE_KEY_PREFIX='middlewareprefix', CACHE_MIDDLEWARE_SECONDS=30, CACHE_MIDDLEWARE_ANONYMOUS_ONLY=False, CACHES={ 'default': { 'BACKEND': 'django.core.cache.backends.locmem.LocMemCache', }, 'other': { 'BACKEND': 'django.core.cache.backends.locmem.LocMemCache', 'LOCATION': 'other', 'TIMEOUT': '1', }, }, ) class CacheMiddlewareTest(TestCase): # The following tests will need to be modified in Django 1.6 to not use # deprecated ways of using the cache_page decorator that will be removed in # such version def setUp(self): self.factory = RequestFactory() self.default_cache = get_cache('default') self.other_cache = get_cache('other') self.save_warnings_state() warnings.filterwarnings('ignore', category=DeprecationWarning, module='django.views.decorators.cache') def tearDown(self): self.restore_warnings_state() self.default_cache.clear() self.other_cache.clear() def test_constructor(self): """ Ensure the constructor is correctly distinguishing between usage of CacheMiddleware as Middleware vs. usage of CacheMiddleware as view decorator and setting attributes appropriately. """ # If no arguments are passed in construction, it's being used as middleware. middleware = CacheMiddleware() # Now test object attributes against values defined in setUp above self.assertEqual(middleware.cache_timeout, 30) self.assertEqual(middleware.key_prefix, 'middlewareprefix') self.assertEqual(middleware.cache_alias, 'other') self.assertEqual(middleware.cache_anonymous_only, False) # If arguments are being passed in construction, it's being used as a decorator. # First, test with "defaults": as_view_decorator = CacheMiddleware(cache_alias=None, key_prefix=None) self.assertEqual(as_view_decorator.cache_timeout, 300) # Timeout value for 'default' cache, i.e. 300 self.assertEqual(as_view_decorator.key_prefix, '') self.assertEqual(as_view_decorator.cache_alias, 'default') # Value of DEFAULT_CACHE_ALIAS from django.core.cache self.assertEqual(as_view_decorator.cache_anonymous_only, False) # Next, test with custom values: as_view_decorator_with_custom = CacheMiddleware(cache_anonymous_only=True, cache_timeout=60, cache_alias='other', key_prefix='foo') self.assertEqual(as_view_decorator_with_custom.cache_timeout, 60) self.assertEqual(as_view_decorator_with_custom.key_prefix, 'foo') self.assertEqual(as_view_decorator_with_custom.cache_alias, 'other') self.assertEqual(as_view_decorator_with_custom.cache_anonymous_only, True) def test_middleware(self): middleware = CacheMiddleware() prefix_middleware = CacheMiddleware(key_prefix='prefix1') timeout_middleware = CacheMiddleware(cache_timeout=1) request = self.factory.get('/view/') # Put the request through the request middleware result = middleware.process_request(request) self.assertEqual(result, None) response = hello_world_view(request, '1') # Now put the response through the response middleware response = middleware.process_response(request, response) # Repeating the request should result in a cache hit result = middleware.process_request(request) self.assertNotEqual(result, None) self.assertEqual(result.content, b'Hello World 1') # The same request through a different middleware won't hit result = prefix_middleware.process_request(request) self.assertEqual(result, None) # The same request with a timeout _will_ hit result = timeout_middleware.process_request(request) self.assertNotEqual(result, None) self.assertEqual(result.content, b'Hello World 1') @override_settings(CACHE_MIDDLEWARE_ANONYMOUS_ONLY=True) def test_cache_middleware_anonymous_only_wont_cause_session_access(self): """ The cache middleware shouldn't cause a session access due to CACHE_MIDDLEWARE_ANONYMOUS_ONLY if nothing else has accessed the session. Refs 13283 """ from django.contrib.sessions.middleware import SessionMiddleware from django.contrib.auth.middleware import AuthenticationMiddleware middleware = CacheMiddleware() session_middleware = SessionMiddleware() auth_middleware = AuthenticationMiddleware() request = self.factory.get('/view_anon/') # Put the request through the request middleware session_middleware.process_request(request) auth_middleware.process_request(request) result = middleware.process_request(request) self.assertEqual(result, None) response = hello_world_view(request, '1') # Now put the response through the response middleware session_middleware.process_response(request, response) response = middleware.process_response(request, response) self.assertEqual(request.session.accessed, False) @override_settings(CACHE_MIDDLEWARE_ANONYMOUS_ONLY=True) def test_cache_middleware_anonymous_only_with_cache_page(self): """CACHE_MIDDLEWARE_ANONYMOUS_ONLY should still be effective when used with the cache_page decorator: the response to a request from an authenticated user should not be cached.""" request = self.factory.get('/view_anon/') class MockAuthenticatedUser(object): def is_authenticated(self): return True class MockAccessedSession(object): accessed = True request.user = MockAuthenticatedUser() request.session = MockAccessedSession() response = cache_page(hello_world_view)(request, '1') self.assertFalse("Cache-Control" in response) def test_view_decorator(self): # decorate the same view with different cache decorators default_view = cache_page(hello_world_view) default_with_prefix_view = cache_page(key_prefix='prefix1')(hello_world_view) explicit_default_view = cache_page(cache='default')(hello_world_view) explicit_default_with_prefix_view = cache_page(cache='default', key_prefix='prefix1')(hello_world_view) other_view = cache_page(cache='other')(hello_world_view) other_with_prefix_view = cache_page(cache='other', key_prefix='prefix2')(hello_world_view) other_with_timeout_view = cache_page(3, cache='other', key_prefix='prefix3')(hello_world_view) request = self.factory.get('/view/') # Request the view once response = default_view(request, '1') self.assertEqual(response.content, b'Hello World 1') # Request again -- hit the cache response = default_view(request, '2') self.assertEqual(response.content, b'Hello World 1') # Requesting the same view with the explicit cache should yield the same result response = explicit_default_view(request, '3') self.assertEqual(response.content, b'Hello World 1') # Requesting with a prefix will hit a different cache key response = explicit_default_with_prefix_view(request, '4') self.assertEqual(response.content, b'Hello World 4') # Hitting the same view again gives a cache hit response = explicit_default_with_prefix_view(request, '5') self.assertEqual(response.content, b'Hello World 4') # And going back to the implicit cache will hit the same cache response = default_with_prefix_view(request, '6') self.assertEqual(response.content, b'Hello World 4') # Requesting from an alternate cache won't hit cache response = other_view(request, '7') self.assertEqual(response.content, b'Hello World 7') # But a repeated hit will hit cache response = other_view(request, '8') self.assertEqual(response.content, b'Hello World 7') # And prefixing the alternate cache yields yet another cache entry response = other_with_prefix_view(request, '9') self.assertEqual(response.content, b'Hello World 9') # Request from the alternate cache with a new prefix and a custom timeout response = other_with_timeout_view(request, '10') self.assertEqual(response.content, b'Hello World 10') # But if we wait a couple of seconds... time.sleep(2) # ... the default cache will still hit cache = get_cache('default') response = default_view(request, '11') self.assertEqual(response.content, b'Hello World 1') # ... the default cache with a prefix will still hit response = default_with_prefix_view(request, '12') self.assertEqual(response.content, b'Hello World 4') # ... the explicit default cache will still hit response = explicit_default_view(request, '13') self.assertEqual(response.content, b'Hello World 1') # ... the explicit default cache with a prefix will still hit response = explicit_default_with_prefix_view(request, '14') self.assertEqual(response.content, b'Hello World 4') # .. but a rapidly expiring cache won't hit response = other_view(request, '15') self.assertEqual(response.content, b'Hello World 15') # .. even if it has a prefix response = other_with_prefix_view(request, '16') self.assertEqual(response.content, b'Hello World 16') # ... but a view with a custom timeout will still hit response = other_with_timeout_view(request, '17') self.assertEqual(response.content, b'Hello World 10') # And if we wait a few more seconds time.sleep(2) # the custom timeout cache will miss response = other_with_timeout_view(request, '18') self.assertEqual(response.content, b'Hello World 18') @override_settings( CACHE_MIDDLEWARE_KEY_PREFIX='settingsprefix', CACHE_MIDDLEWARE_SECONDS=1, CACHES={ 'default': { 'BACKEND': 'django.core.cache.backends.locmem.LocMemCache', }, }, USE_I18N=False, ) class TestWithTemplateResponse(TestCase): """ Tests various headers w/ TemplateResponse. Most are probably redundant since they manipulate the same object anyway but the Etag header is 'special' because it relies on the content being complete (which is not necessarily always the case with a TemplateResponse) """ def setUp(self): self.path = '/cache/test/' self.cache = get_cache('default') def tearDown(self): self.cache.clear() def _get_request(self, path, method='GET'): request = HttpRequest() request.META = { 'SERVER_NAME': 'testserver', 'SERVER_PORT': 80, } request.method = method request.path = request.path_info = "/cache/%s" % path return request def test_patch_vary_headers(self): headers = ( # Initial vary, new headers, resulting vary. (None, ('Accept-Encoding',), 'Accept-Encoding'), ('Accept-Encoding', ('accept-encoding',), 'Accept-Encoding'), ('Accept-Encoding', ('ACCEPT-ENCODING',), 'Accept-Encoding'), ('Cookie', ('Accept-Encoding',), 'Cookie, Accept-Encoding'), ('Cookie, Accept-Encoding', ('Accept-Encoding',), 'Cookie, Accept-Encoding'), ('Cookie, Accept-Encoding', ('Accept-Encoding', 'cookie'), 'Cookie, Accept-Encoding'), (None, ('Accept-Encoding', 'COOKIE'), 'Accept-Encoding, COOKIE'), ('Cookie, Accept-Encoding', ('Accept-Encoding', 'cookie'), 'Cookie, Accept-Encoding'), ('Cookie , Accept-Encoding', ('Accept-Encoding', 'cookie'), 'Cookie, Accept-Encoding'), ) for initial_vary, newheaders, resulting_vary in headers: response = TemplateResponse(HttpResponse(), Template("This is a test")) if initial_vary is not None: response['Vary'] = initial_vary patch_vary_headers(response, newheaders) self.assertEqual(response['Vary'], resulting_vary) def test_get_cache_key(self): request = self._get_request(self.path) response = TemplateResponse(HttpResponse(), Template("This is a test")) key_prefix = 'localprefix' # Expect None if no headers have been set yet. self.assertEqual(get_cache_key(request), None) # Set headers to an empty list. learn_cache_key(request, response) self.assertEqual(get_cache_key(request), 'views.decorators.cache.cache_page.settingsprefix.GET.a8c87a3d8c44853d7f79474f7ffe4ad5.d41d8cd98f00b204e9800998ecf8427e') # Verify that a specified key_prefix is taken into account. learn_cache_key(request, response, key_prefix=key_prefix) self.assertEqual(get_cache_key(request, key_prefix=key_prefix), 'views.decorators.cache.cache_page.localprefix.GET.a8c87a3d8c44853d7f79474f7ffe4ad5.d41d8cd98f00b204e9800998ecf8427e') def test_get_cache_key_with_query(self): request = self._get_request(self.path + '?test=1') response = TemplateResponse(HttpResponse(), Template("This is a test")) # Expect None if no headers have been set yet. self.assertEqual(get_cache_key(request), None) # Set headers to an empty list. learn_cache_key(request, response) # Verify that the querystring is taken into account. self.assertEqual(get_cache_key(request), 'views.decorators.cache.cache_page.settingsprefix.GET.bd889c5a59603af44333ed21504db3cd.d41d8cd98f00b204e9800998ecf8427e') @override_settings(USE_ETAGS=False) def test_without_etag(self): response = TemplateResponse(HttpResponse(), Template("This is a test")) self.assertFalse(response.has_header('ETag')) patch_response_headers(response) self.assertFalse(response.has_header('ETag')) response = response.render() self.assertFalse(response.has_header('ETag')) @override_settings(USE_ETAGS=True) def test_with_etag(self): response = TemplateResponse(HttpResponse(), Template("This is a test")) self.assertFalse(response.has_header('ETag')) patch_response_headers(response) self.assertFalse(response.has_header('ETag')) response = response.render() self.assertTrue(response.has_header('ETag')) class TestEtagWithAdmin(TestCase): # See https://code.djangoproject.com/ticket/16003 urls = "regressiontests.admin_views.urls" def test_admin(self): with self.settings(USE_ETAGS=False): response = self.client.get('/test_admin/admin/') self.assertEqual(response.status_code, 200) self.assertFalse(response.has_header('ETag')) with self.settings(USE_ETAGS=True): response = self.client.get('/test_admin/admin/') self.assertEqual(response.status_code, 200) self.assertTrue(response.has_header('ETag'))