# -*- coding: utf-8 -*- from __future__ import unicode_literals import os import sys import unittest from django import template from django.contrib.auth.models import Group from django.core import urlresolvers from django.template import (base as template_base, loader, Context, RequestContext, Template, TemplateSyntaxError) from django.template.engine import Engine from django.template.loaders import app_directories, filesystem from django.test import RequestFactory, SimpleTestCase from django.test.utils import override_settings, extend_sys_path from django.utils._os import upath class TemplateLoaderTests(SimpleTestCase): def test_loaders_security(self): ad_loader = app_directories.Loader(Engine.get_default()) fs_loader = filesystem.Loader(Engine.get_default()) def test_template_sources(path, template_dirs, expected_sources): if isinstance(expected_sources, list): # Fix expected sources so they are abspathed expected_sources = [os.path.abspath(s) for s in expected_sources] # Test the two loaders (app_directores and filesystem). func1 = lambda p, t: list(ad_loader.get_template_sources(p, t)) func2 = lambda p, t: list(fs_loader.get_template_sources(p, t)) for func in (func1, func2): if isinstance(expected_sources, list): self.assertEqual(func(path, template_dirs), expected_sources) else: self.assertRaises(expected_sources, func, path, template_dirs) template_dirs = ['/dir1', '/dir2'] test_template_sources('index.html', template_dirs, ['/dir1/index.html', '/dir2/index.html']) test_template_sources('/etc/passwd', template_dirs, []) test_template_sources('etc/passwd', template_dirs, ['/dir1/etc/passwd', '/dir2/etc/passwd']) test_template_sources('../etc/passwd', template_dirs, []) test_template_sources('../../../etc/passwd', template_dirs, []) test_template_sources('/dir1/index.html', template_dirs, ['/dir1/index.html']) test_template_sources('../dir2/index.html', template_dirs, ['/dir2/index.html']) test_template_sources('/dir1blah', template_dirs, []) test_template_sources('../dir1blah', template_dirs, []) # UTF-8 bytestrings are permitted. test_template_sources(b'\xc3\x85ngstr\xc3\xb6m', template_dirs, ['/dir1/Ångström', '/dir2/Ångström']) # Unicode strings are permitted. test_template_sources('Ångström', template_dirs, ['/dir1/Ångström', '/dir2/Ångström']) test_template_sources('Ångström', [b'/Stra\xc3\x9fe'], ['/Straße/Ångström']) test_template_sources(b'\xc3\x85ngstr\xc3\xb6m', [b'/Stra\xc3\x9fe'], ['/Straße/Ångström']) # Invalid UTF-8 encoding in bytestrings is not. Should raise a # semi-useful error message. test_template_sources(b'\xc3\xc3', template_dirs, UnicodeDecodeError) # Case insensitive tests (for win32). Not run unless we're on # a case insensitive operating system. if os.path.normcase('/TEST') == os.path.normpath('/test'): template_dirs = ['/dir1', '/DIR2'] test_template_sources('index.html', template_dirs, ['/dir1/index.html', '/DIR2/index.html']) test_template_sources('/DIR1/index.HTML', template_dirs, ['/DIR1/index.HTML']) @override_settings(TEMPLATE_LOADERS=['django.template.loaders.filesystem.Loader']) # Turn TEMPLATE_DEBUG on, so that the origin file name will be kept with # the compiled templates. @override_settings(TEMPLATE_DEBUG=True) def test_loader_debug_origin(self): # We rely on the fact that runtests.py sets up TEMPLATE_DIRS to # point to a directory containing a login.html file. load_name = 'login.html' # We also rely on the fact the file system and app directories loaders # both inherit the load_template method from the base Loader class, so # we only need to test one of them. template = loader.get_template(load_name).template template_name = template.nodelist[0].source[0].name self.assertTrue(template_name.endswith(load_name), 'Template loaded by filesystem loader has incorrect name for debug page: %s' % template_name) @override_settings(TEMPLATE_LOADERS=[ ('django.template.loaders.cached.Loader', ['django.template.loaders.filesystem.Loader']), ]) @override_settings(TEMPLATE_DEBUG=True) def test_cached_loader_debug_origin(self): # Same comment as in test_loader_debug_origin. load_name = 'login.html' # Test the cached loader separately since it overrides load_template. template = loader.get_template(load_name).template template_name = template.nodelist[0].source[0].name self.assertTrue(template_name.endswith(load_name), 'Template loaded through cached loader has incorrect name for debug page: %s' % template_name) template = loader.get_template(load_name).template template_name = template.nodelist[0].source[0].name self.assertTrue(template_name.endswith(load_name), 'Cached template loaded through cached loader has incorrect name for debug page: %s' % template_name) @override_settings(TEMPLATE_DEBUG=True) def test_loader_origin(self): template = loader.get_template('login.html') self.assertEqual(template.origin.loadname, 'login.html') @override_settings(TEMPLATE_DEBUG=True) def test_string_origin(self): template = Template('string template') self.assertEqual(template.origin.source, 'string template') def test_debug_false_origin(self): template = loader.get_template('login.html') self.assertEqual(template.origin, None) # TEMPLATE_DEBUG must be true, otherwise the exception raised # during {% include %} processing will be suppressed. @override_settings(TEMPLATE_DEBUG=True) # Test the base loader class via the app loader. load_template # from base is used by all shipped loaders excepting cached, # which has its own test. @override_settings(TEMPLATE_LOADERS=['django.template.loaders.app_directories.Loader']) def test_include_missing_template(self): """ Tests that the correct template is identified as not existing when {% include %} specifies a template that does not exist. """ load_name = 'test_include_error.html' r = None try: tmpl = loader.select_template([load_name]) r = tmpl.render(template.Context({})) except template.TemplateDoesNotExist as e: self.assertEqual(e.args[0], 'missing.html') self.assertEqual(r, None, 'Template rendering unexpectedly succeeded, produced: ->%r<-' % r) # TEMPLATE_DEBUG must be true, otherwise the exception raised # during {% include %} processing will be suppressed. @override_settings(TEMPLATE_DEBUG=True) # Test the base loader class via the app loader. load_template # from base is used by all shipped loaders excepting cached, # which has its own test. @override_settings(TEMPLATE_LOADERS=['django.template.loaders.app_directories.Loader']) def test_extends_include_missing_baseloader(self): """ Tests that the correct template is identified as not existing when {% extends %} specifies a template that does exist, but that template has an {% include %} of something that does not exist. See #12787. """ load_name = 'test_extends_error.html' tmpl = loader.get_template(load_name) r = None try: r = tmpl.render(template.Context({})) except template.TemplateDoesNotExist as e: self.assertEqual(e.args[0], 'missing.html') self.assertEqual(r, None, 'Template rendering unexpectedly succeeded, produced: ->%r<-' % r) @override_settings(TEMPLATE_DEBUG=True) def test_extends_include_missing_cachedloader(self): """ Same as test_extends_include_missing_baseloader, only tests behavior of the cached loader instead of base loader. """ with override_settings(TEMPLATE_LOADERS=[ ('django.template.loaders.cached.Loader', [ 'django.template.loaders.app_directories.Loader', ]), ]): load_name = 'test_extends_error.html' tmpl = loader.get_template(load_name) r = None try: r = tmpl.render(template.Context({})) except template.TemplateDoesNotExist as e: self.assertEqual(e.args[0], 'missing.html') self.assertEqual(r, None, 'Template rendering unexpectedly succeeded, produced: ->%r<-' % r) # For the cached loader, repeat the test, to ensure the first attempt did not cache a # result that behaves incorrectly on subsequent attempts. tmpl = loader.get_template(load_name) try: tmpl.render(template.Context({})) except template.TemplateDoesNotExist as e: self.assertEqual(e.args[0], 'missing.html') self.assertEqual(r, None, 'Template rendering unexpectedly succeeded, produced: ->%r<-' % r) def test_include_template_argument(self): """ Support any render() supporting object """ ctx = Context({ 'tmpl': Template('This worked!'), }) outer_tmpl = Template('{% include tmpl %}') output = outer_tmpl.render(ctx) self.assertEqual(output, 'This worked!') @override_settings(TEMPLATE_DEBUG=True) def test_include_immediate_missing(self): """ Regression test for #16417 -- {% include %} tag raises TemplateDoesNotExist at compile time if TEMPLATE_DEBUG is True Test that an {% include %} tag with a literal string referencing a template that does not exist does not raise an exception at parse time. """ tmpl = Template('{% include "this_does_not_exist.html" %}') self.assertIsInstance(tmpl, Template) @override_settings(TEMPLATE_DEBUG=True) def test_include_recursive(self): comments = [ { 'comment': 'A1', 'children': [ {'comment': 'B1', 'children': []}, {'comment': 'B2', 'children': []}, {'comment': 'B3', 'children': [ {'comment': 'C1', 'children': []} ]}, ] } ] t = loader.get_template('recursive_include.html') self.assertEqual( "Recursion! A1 Recursion! B1 B2 B3 Recursion! C1", t.render(Context({'comments': comments})).replace(' ', '').replace('\n', ' ').strip(), ) class TemplateRegressionTests(SimpleTestCase): def test_token_smart_split(self): # Regression test for #7027 token = template_base.Token(template_base.TOKEN_BLOCK, 'sometag _("Page not found") value|yesno:_("yes,no")') split = token.split_contents() self.assertEqual(split, ["sometag", '_("Page not found")', 'value|yesno:_("yes,no")']) @override_settings(SETTINGS_MODULE=None, TEMPLATE_DEBUG=True) def test_url_reverse_no_settings_module(self): # Regression test for #9005 t = Template('{% url will_not_match %}') c = Context() with self.assertRaises(urlresolvers.NoReverseMatch): t.render(c) @override_settings( TEMPLATES=[{ 'BACKEND': 'django.template.backends.django.DjangoTemplates', 'OPTIONS': {'string_if_invalid': '%s is invalid'}, }], SETTINGS_MODULE='also_something', ) def test_url_reverse_view_name(self): # Regression test for #19827 t = Template('{% url will_not_match %}') c = Context() try: t.render(c) except urlresolvers.NoReverseMatch: tb = sys.exc_info()[2] depth = 0 while tb.tb_next is not None: tb = tb.tb_next depth += 1 self.assertGreater(depth, 5, "The traceback context was lost when reraising the traceback. See #19827") @override_settings(DEBUG=True, TEMPLATE_DEBUG=True) def test_no_wrapped_exception(self): """ The template system doesn't wrap exceptions, but annotates them. Refs #16770 """ c = Context({"coconuts": lambda: 42 / 0}) t = Template("{{ coconuts }}") with self.assertRaises(ZeroDivisionError) as cm: t.render(c) self.assertEqual(cm.exception.django_template_source[1], (0, 14)) def test_invalid_block_suggestion(self): # See #7876 try: Template("{% if 1 %}lala{% endblock %}{% endif %}") except TemplateSyntaxError as e: self.assertEqual(e.args[0], "Invalid block tag: 'endblock', expected 'elif', 'else' or 'endif'") def test_ifchanged_concurrency(self): # Tests for #15849 template = Template('[0{% for x in foo %},{% with var=get_value %}{% ifchanged %}{{ var }}{% endifchanged %}{% endwith %}{% endfor %}]') # Using generator to mimic concurrency. # The generator is not passed to the 'for' loop, because it does a list(values) # instead, call gen.next() in the template to control the generator. def gen(): yield 1 yield 2 # Simulate that another thread is now rendering. # When the IfChangeNode stores state at 'self' it stays at '3' and skip the last yielded value below. iter2 = iter([1, 2, 3]) output2 = template.render(Context({'foo': range(3), 'get_value': lambda: next(iter2)})) self.assertEqual(output2, '[0,1,2,3]', 'Expected [0,1,2,3] in second parallel template, got {}'.format(output2)) yield 3 gen1 = gen() output1 = template.render(Context({'foo': range(3), 'get_value': lambda: next(gen1)})) self.assertEqual(output1, '[0,1,2,3]', 'Expected [0,1,2,3] in first template, got {}'.format(output1)) def test_cache_regression_20130(self): t = Template('{% load cache %}{% cache 1 regression_20130 %}foo{% endcache %}') cachenode = t.nodelist[1] self.assertEqual(cachenode.fragment_name, 'regression_20130') @override_settings(CACHES={ 'default': { 'BACKEND': 'django.core.cache.backends.locmem.LocMemCache', 'LOCATION': 'default', }, 'template_fragments': { 'BACKEND': 'django.core.cache.backends.locmem.LocMemCache', 'LOCATION': 'fragments', }, }) def test_cache_fragment_cache(self): """ When a cache called "template_fragments" is present, the cache tag will use it in preference to 'default' """ t1 = Template('{% load cache %}{% cache 1 fragment %}foo{% endcache %}') t2 = Template('{% load cache %}{% cache 1 fragment using="default" %}bar{% endcache %}') ctx = Context() o1 = t1.render(ctx) o2 = t2.render(ctx) self.assertEqual(o1, 'foo') self.assertEqual(o2, 'bar') def test_cache_missing_backend(self): """ When a cache that doesn't exist is specified, the cache tag will raise a TemplateSyntaxError '""" t = Template('{% load cache %}{% cache 1 backend using="unknown" %}bar{% endcache %}') ctx = Context() with self.assertRaises(TemplateSyntaxError): t.render(ctx) def test_ifchanged_render_once(self): """ Test for ticket #19890. The content of ifchanged template tag was rendered twice.""" template = Template('{% ifchanged %}{% cycle "1st time" "2nd time" %}{% endifchanged %}') output = template.render(Context({})) self.assertEqual(output, '1st time') def test_super_errors(self): """ Test behavior of the raise errors into included blocks. See #18169 """ t = loader.get_template('included_content.html') with self.assertRaises(urlresolvers.NoReverseMatch): t.render(Context({})) def test_debug_tag_non_ascii(self): """ Test non-ASCII model representation in debug output (#23060). """ Group.objects.create(name="清風") c1 = Context({"objs": Group.objects.all()}) t1 = Template('{% debug %}') self.assertIn("清風", t1.render(c1)) class TemplateTagLoading(SimpleTestCase): def setUp(self): self.egg_dir = '%s/eggs' % os.path.dirname(upath(__file__)) def test_load_error(self): ttext = "{% load broken_tag %}" self.assertRaises(template.TemplateSyntaxError, template.Template, ttext) try: template.Template(ttext) except template.TemplateSyntaxError as e: self.assertIn('ImportError', e.args[0]) self.assertIn('Xtemplate', e.args[0]) def test_load_error_egg(self): ttext = "{% load broken_egg %}" egg_name = '%s/tagsegg.egg' % self.egg_dir with extend_sys_path(egg_name): with self.assertRaises(template.TemplateSyntaxError): with self.settings(INSTALLED_APPS=['tagsegg']): template.Template(ttext) try: with self.settings(INSTALLED_APPS=['tagsegg']): template.Template(ttext) except template.TemplateSyntaxError as e: self.assertIn('ImportError', e.args[0]) self.assertIn('Xtemplate', e.args[0]) def test_load_working_egg(self): ttext = "{% load working_egg %}" egg_name = '%s/tagsegg.egg' % self.egg_dir with extend_sys_path(egg_name): with self.settings(INSTALLED_APPS=['tagsegg']): template.Template(ttext) class RequestContextTests(unittest.TestCase): def setUp(self): self.fake_request = RequestFactory().get('/') @override_settings(TEMPLATE_LOADERS=[ ('django.template.loaders.locmem.Loader', { 'child': '{{ var|default:"none" }}', }), ]) def test_include_only(self): """ Regression test for #15721, ``{% include %}`` and ``RequestContext`` not playing together nicely. """ ctx = RequestContext(self.fake_request, {'var': 'parent'}) self.assertEqual( template.Template('{% include "child" %}').render(ctx), 'parent' ) self.assertEqual( template.Template('{% include "child" only %}').render(ctx), 'none' ) def test_stack_size(self): """ Regression test for #7116, Optimize RequetsContext construction """ ctx = RequestContext(self.fake_request, {}) # The stack should now contain 3 items: # [builtins, supplied context, context processor] self.assertEqual(len(ctx.dicts), 3) @override_settings(TEMPLATE_CONTEXT_PROCESSORS=()) def test_context_comparable(self): test_data = {'x': 'y', 'v': 'z', 'd': {'o': object, 'a': 'b'}} # test comparing RequestContext to prevent problems if somebody # adds __eq__ in the future request = RequestFactory().get('/') self.assertEqual( RequestContext(request, dict_=test_data), RequestContext(request, dict_=test_data) ) class SSITests(SimpleTestCase): def setUp(self): self.this_dir = os.path.dirname(os.path.abspath(upath(__file__))) self.ssi_dir = os.path.join(self.this_dir, "templates", "first") self.engine = Engine(allowed_include_roots=(self.ssi_dir,)) def render_ssi(self, path): # the path must exist for the test to be reliable self.assertTrue(os.path.exists(path)) return self.engine.from_string('{%% ssi "%s" %%}' % path).render(Context({})) def test_allowed_paths(self): acceptable_path = os.path.join(self.ssi_dir, "..", "first", "test.html") self.assertEqual(self.render_ssi(acceptable_path), 'First template\n') def test_relative_include_exploit(self): """ May not bypass allowed_include_roots with relative paths e.g. if allowed_include_roots = ("/var/www",), it should not be possible to do {% ssi "/var/www/../../etc/passwd" %} """ disallowed_paths = [ os.path.join(self.ssi_dir, "..", "ssi_include.html"), os.path.join(self.ssi_dir, "..", "second", "test.html"), ] for disallowed_path in disallowed_paths: self.assertEqual(self.render_ssi(disallowed_path), '')