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[fix] checker: fix memory usage

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* download images using the "image_proxy" network (HTTP/1 instead of HTTP/2)
* don't cache data: URL (reduce memory usage)
* after each test: purge image URL cache then call garbage collector
* download only the first 64kb of images
This commit is contained in:
Alexandre Flament 2021-09-22 13:36:34 +02:00
parent ca67f1555a
commit 2eab89b4ca
1 changed files with 48 additions and 27 deletions
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75
searx/search/checker/impl.py
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@ -1,5 +1,6 @@
# SPDX-License-Identifier: AGPL-3.0-or-later
import gc
import typing
import types
import functools
@ -14,6 +15,7 @@ from langdetect.lang_detect_exception import LangDetectException
import httpx
from searx import network, logger
from searx.utils import gen_useragent
from searx.results import ResultContainer
from searx.search.models import SearchQuery, EngineRef
from searx.search.processors import EngineProcessor
@ -58,7 +60,47 @@ def _is_url(url):
@functools.lru_cache(maxsize=8192)
def _is_url_image(image_url):
def _download_and_check_if_image(image_url: str) -> bool:
"""Download an URL and check if the Content-Type starts with "image/"
This function should not be called directly: use _is_url_image
otherwise the cache of functools.lru_cache contains data: URL which might be huge.
"""
retry = 2
while retry > 0:
a = time()
try:
# use "image_proxy" (avoid HTTP/2)
network.set_context_network_name('image_proxy')
stream = network.stream('GET', image_url, timeout=10.0, allow_redirects=True, headers={
'User-Agent': gen_useragent(),
'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8',
'Accept-Language': 'en-US;q=0.5,en;q=0.3',
'Accept-Encoding': 'gzip, deflate, br',
'DNT': '1',
'Connection': 'keep-alive',
'Upgrade-Insecure-Requests': '1',
'Sec-GPC': '1',
'Cache-Control': 'max-age=0'
})
r = next(stream)
r.close()
is_image = r.headers["content-type"].startswith('image/')
del r
del stream
return is_image
except httpx.TimeoutException:
logger.error('Timeout for %s: %i', image_url, int(time() - a))
retry -= 1
except httpx.HTTPError:
logger.exception('Exception for %s', image_url)
return False
return False
def _is_url_image(image_url) -> bool:
"""Normalize image_url
"""
if not isinstance(image_url, str):
return False
@ -71,32 +113,7 @@ def _is_url_image(image_url):
if not _is_url(image_url):
return False
retry = 2
while retry > 0:
a = time()
try:
network.set_timeout_for_thread(10.0, time())
r = network.get(image_url, timeout=10.0, allow_redirects=True, headers={
'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:84.0) Gecko/20100101 Firefox/84.0',
'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8',
'Accept-Language': 'en-US;q=0.5,en;q=0.3',
'Accept-Encoding': 'gzip, deflate, br',
'DNT': '1',
'Connection': 'keep-alive',
'Upgrade-Insecure-Requests': '1',
'Sec-GPC': '1',
'Cache-Control': 'max-age=0'
})
if r.headers["content-type"].startswith('image/'):
return True
return False
except httpx.TimeoutException:
logger.error('Timeout for %s: %i', image_url, int(time() - a))
retry -= 1
except httpx.HTTPError:
logger.exception('Exception for %s', image_url)
return False
return _download_and_check_if_image(image_url)
def _search_query_to_dict(search_query: SearchQuery) -> typing.Dict[str, typing.Any]:
@ -414,3 +431,7 @@ class Checker:
def run(self):
for test_name in self.tests:
self.run_test(test_name)
# clear cache
_download_and_check_if_image.cache_clear()
# force a garbage collector
gc.collect()