# -*- coding: utf-8 -*-
# Copyright 2018 New Vector Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import os
from mock import Mock
from twisted.internet.defer import Deferred
from synapse.config.repository import MediaStorageProviderConfig
from synapse.util.logcontext import make_deferred_yieldable
from synapse.util.module_loader import load_module
from tests import unittest
class URLPreviewTests(unittest.HomeserverTestCase):
hijack_auth = True
user_id = "@test:user"
def make_homeserver(self, reactor, clock):
self.storage_path = self.mktemp()
os.mkdir(self.storage_path)
config = self.default_config()
config.url_preview_enabled = True
config.max_spider_size = 9999999
config.url_preview_url_blacklist = []
config.media_store_path = self.storage_path
provider_config = {
"module": "synapse.rest.media.v1.storage_provider.FileStorageProviderBackend",
"store_local": True,
"store_synchronous": False,
"store_remote": True,
"config": {"directory": self.storage_path},
}
loaded = list(load_module(provider_config)) + [
MediaStorageProviderConfig(False, False, False)
]
config.media_storage_providers = [loaded]
hs = self.setup_test_homeserver(config=config)
return hs
def prepare(self, reactor, clock, hs):
self.fetches = []
def get_file(url, output_stream, max_size):
"""
Returns tuple[int,dict,str,int] of file length, response headers,
absolute URI, and response code.
"""
def write_to(r):
data, response = r
output_stream.write(data)
return response
d = Deferred()
d.addCallback(write_to)
self.fetches.append((d, url))
return make_deferred_yieldable(d)
client = Mock()
client.get_file = get_file
self.media_repo = hs.get_media_repository_resource()
preview_url = self.media_repo.children[b'preview_url']
preview_url.client = client
self.preview_url = preview_url
def test_cache_returns_correct_type(self):
request, channel = self.make_request(
"GET", "url_preview?url=matrix.org", shorthand=False
)
request.render(self.preview_url)
self.pump()
# We've made one fetch
self.assertEqual(len(self.fetches), 1)
end_content = (
b''
b''
b''
b''
)
self.fetches[0][0].callback(
(
end_content,
(
len(end_content),
{
b"Content-Length": [b"%d" % (len(end_content))],
b"Content-Type": [b'text/html; charset="utf8"'],
},
"https://example.com",
200,
),
)
)
self.pump()
self.assertEqual(channel.code, 200)
self.assertEqual(
channel.json_body, {"og:title": "~matrix~", "og:description": "hi"}
)
# Check the cache returns the correct response
request, channel = self.make_request(
"GET", "url_preview?url=matrix.org", shorthand=False
)
request.render(self.preview_url)
self.pump()
# Only one fetch, still, since we'll lean on the cache
self.assertEqual(len(self.fetches), 1)
# Check the cache response has the same content
self.assertEqual(channel.code, 200)
self.assertEqual(
channel.json_body, {"og:title": "~matrix~", "og:description": "hi"}
)
# Clear the in-memory cache
self.assertIn("matrix.org", self.preview_url._cache)
self.preview_url._cache.pop("matrix.org")
self.assertNotIn("matrix.org", self.preview_url._cache)
# Check the database cache returns the correct response
request, channel = self.make_request(
"GET", "url_preview?url=matrix.org", shorthand=False
)
request.render(self.preview_url)
self.pump()
# Only one fetch, still, since we'll lean on the cache
self.assertEqual(len(self.fetches), 1)
# Check the cache response has the same content
self.assertEqual(channel.code, 200)
self.assertEqual(
channel.json_body, {"og:title": "~matrix~", "og:description": "hi"}
)
def test_non_ascii_preview_httpequiv(self):
request, channel = self.make_request(
"GET", "url_preview?url=matrix.org", shorthand=False
)
request.render(self.preview_url)
self.pump()
# We've made one fetch
self.assertEqual(len(self.fetches), 1)
end_content = (
b''
b''
b''
b''
b''
)
self.fetches[0][0].callback(
(
end_content,
(
len(end_content),
{
b"Content-Length": [b"%d" % (len(end_content))],
# This charset=utf-8 should be ignored, because the
# document has a meta tag overriding it.
b"Content-Type": [b'text/html; charset="utf8"'],
},
"https://example.com",
200,
),
)
)
self.pump()
self.assertEqual(channel.code, 200)
self.assertEqual(channel.json_body["og:title"], u"\u0434\u043a\u0430")
def test_non_ascii_preview_content_type(self):
request, channel = self.make_request(
"GET", "url_preview?url=matrix.org", shorthand=False
)
request.render(self.preview_url)
self.pump()
# We've made one fetch
self.assertEqual(len(self.fetches), 1)
end_content = (
b''
b''
b''
b''
)
self.fetches[0][0].callback(
(
end_content,
(
len(end_content),
{
b"Content-Length": [b"%d" % (len(end_content))],
b"Content-Type": [b'text/html; charset="windows-1251"'],
},
"https://example.com",
200,
),
)
)
self.pump()
self.assertEqual(channel.code, 200)
self.assertEqual(channel.json_body["og:title"], u"\u0434\u043a\u0430")