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optimization_checks.py
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optimization_checks.py
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# Copyright 2019 WebPageTest LLC.
# Copyright 2017 Google Inc.
# Copyright 2020 Catchpoint Systems Inc.
# Use of this source code is governed by the Polyform Shield 1.0.0 license that can be
# found in the LICENSE.md file.
"""Run the various optimization checks"""
import binascii
import gzip
import logging
import multiprocessing
import os
import platform
import re
import shutil
import struct
import subprocess
import sys
import threading
import time
if (sys.version_info >= (3, 0)):
from time import monotonic
GZIP_TEXT = 'wt'
unicode = str
else:
from monotonic import monotonic
GZIP_TEXT = 'w'
try:
import ujson as json
except BaseException:
import json
class OptimizationChecks(object):
"""Threaded optimization checks"""
def __init__(self, job, task, requests):
self.job = job
self.task = task
self.running_checks = False
self.requests = requests
self.cdn_thread = None
self.hosting_thread = None
self.gzip_thread = None
self.image_thread = None
self.progressive_thread = None
self.font_thread = None
self.wasm_thread = None
self.cdn_time = None
self.hosting_time = None
self.gzip_time = None
self.image_time = None
self.progressive_time = None
self.font_time = None
self.wasm_time = None
self.cdn_results = {}
self.hosting_results = {}
self.gzip_results = {}
self.image_results = {}
self.progressive_results = {}
self.font_results = {}
self.wasm_results = {}
self.results = {}
self.dns_lookup_queue = multiprocessing.JoinableQueue()
self.dns_result_queue = multiprocessing.JoinableQueue()
self.fetch_queue = multiprocessing.JoinableQueue()
self.fetch_result_queue = multiprocessing.JoinableQueue()
# spell-checker: disable
self.cdn_cnames = {
'Advanced Hosters CDN': ['.pix-cdn.org'],
'afxcdn.net': ['.afxcdn.net'],
'Akamai': ['.akamai.net',
'.akamaized.net',
'.akamaized-staging.net',
'.akamaiedge.net',
'.akamaiedge-staging.net',
'.akamaihd.net',
'.edgesuite.net',
'.edgesuite-staging.net',
'.edgekey.net',
'.edgekey-staging.net',
'.srip.net',
'.akamaitechnologies.com',
'.akamaitechnologies.fr'],
'Akamai China CDN': ['.tl88.net'],
'Alibaba':['a.lahuashanbx.com',
'cdn.gl102.com',
'.alicdn.com',
'danuoyi.tbcache.com',
'gl102.com',
'kunlundns.com',
'm.alikunlun.com',
'm.alikunlun.net',
'm.cdngslb.com',
'm.kunlunaq.com',
'm.kunlunAr.com',
'm.kunlunCa.com',
'm.kunlunCan.com',
'm.kunlunea.com',
'm.kunlungem.com',
'm.kunlungr.com',
'm.kunlunhuf.com',
'm.kunlunle.com',
'm.kunlunLi.com',
'm.kunlunno.com',
'm.kunlunpi.com',
'm.kunlunra.com',
'm.kunlunSa.com',
'm.kunlunSc.com',
'm.kunlunsl.com',
'm.kunlunso.com',
'm.kunlunTa.com',
'm.kunlunVi.com',
'm.kunlunwe.com',
'mobgslb.tbcache.com',
'w.alikunlun.com',
'w.alikunlun.net',
'w.cdngslb.com',
'w.kunlunaq.com',
'w.kunlunAr.com',
'w.kunlunCa.com',
'w.kunlunCan.com',
'w.kunlunea.com',
'w.kunlungem.com',
'w.kunlungr.com',
'w.kunlunhuf.com',
'w.kunlunle.com',
'w.kunlunLi.com',
'w.kunlunno.com',
'w.kunlunpi.com',
'w.kunlunra.com',
'w.kunlunSa.com',
'w.kunlunSc.com',
'w.kunlunsl.com',
'w.kunlunso.com',
'w.kunlunTa.com',
'w.kunlunVi.com',
'w.kunlunwe.com',
'w.queniucdn.com',
'w.queniucg.com',
'w.queniueh.com',
'w.queniuei.com',
'w.queniufz.com',
'w.queniugslb.com',
'w.queniuhx.com',
'w.queniujd.com',
'w.queniujg.com',
'w.queniunh.com',
'w.queniunz.com',
'w.queniurv.com',
'w.queniuso.com',
'w.queniusp.com',
'w.queniusy.com',
'w.queniutt.com',
'w.queniuuf.com',
'w.queniuuq.com',
'w.queniuyk.com'],
'Alimama': ['.gslb.tbcache.com'],
'Amazon CloudFront': ['.cloudfront.net'],
'ArvanCloud': ['.arvancloud.com'],
'Aryaka': ['.aads1.net',
'.aads-cn.net',
'.aads-cng.net'],
'AT&T': ['.att-dsa.net'],
'Automattic': ['.wp.com',
'.wordpress.com',
'.gravatar.com'],
'Azion': ['.azioncdn.net',
'.azioncdn.com',
'.azion.net',
'.azionedge.net'],
'Baleen': ['.baleen.cshield.net'],
'BelugaCDN': ['.belugacdn.com',
'.belugacdn.link'],
'Bison Grid': ['.bisongrid.net'],
'BitGravity': ['.bitgravity.com'],
'Blue Hat Network': ['.bluehatnetwork.com'],
'BO.LT': ['bo.lt'],
'BunnyCDN': ['.b-cdn.net'],
'Cachefly': ['.cachefly.net'],
'Caspowa': ['.caspowa.com'],
'Cedexis': ['.cedexis.net'],
'CDN77': ['.cdn77.net',
'.cdn77.org'],
'CDNetworks': ['.cdngc.net',
'.gccdn.net',
'.panthercdn.com'],
'CDNsun': ['.cdnsun.net'],
'CDNvideo': ['.cdnvideo.ru',
'.cdnvideo.net'],
'ChinaCache': ['.ccgslb.com'],
'ChinaNetCenter': ['.lxdns.com',
'.wscdns.com',
'.wscloudcdn.com',
'.ourwebpic.com'],
'Cloudflare': ['.cloudflare.com',
'.cloudflare.net'],
'Cotendo CDN': ['.cotcdn.net'],
'cubeCDN': ['.cubecdn.net'],
'DigitalOcean Spaces CDN': ['.cdn.digitaloceanspaces.com'],
'Edgecast': ['edgecastcdn.net',
'.systemcdn.net',
'.transactcdn.net',
'.v1cdn.net',
'.v2cdn.net',
'.v3cdn.net',
'.v4cdn.net',
'.v5cdn.net'],
'Erstream': ['.ercdn.net',
'ercdn.com'],
'Facebook': ['.facebook.com',
'.facebook.net',
'.fbcdn.net',
'.cdninstagram.com'],
'Fastly': ['.fastly.net',
'.fastlylb.net',
'.nocookie.net'],
'GoCache': ['.cdn.gocache.net'],
'G-Core CDN': ['.gcdn.co'],
'Google': ['.google.',
'googlesyndication.',
'youtube.',
'.googleusercontent.com',
'googlehosted.com',
'googletagmanager.com',
'googleadservices.com',
'.gstatic.com',
'.googleapis.com',
'.doubleclick.net'],
'HiberniaCDN': ['.hiberniacdn.com'],
'Highwinds': ['hwcdn.net'],
'Hosting4CDN': ['.hosting4cdn.com'],
'HyosungITX': ['.gtmc.hscdn.com'],
'ImageEngine': ['.imgeng.in'],
'Incapsula': ['.incapdns.net'],
'Instart Logic': ['.insnw.net',
'.inscname.net'],
'Internap': ['.internapcdn.net'],
'jsDelivr': ['cdn.jsdelivr.net'],
'JuraganCDN': ['.b.juragancdn.com',
'juragancdn.com'],
'KeyCDN': ['.kxcdn.com'],
'KINX CDN': ['.kinxcdn.com',
'.kinxcdn.net'],
'LeaseWeb CDN': ['.lswcdn.net',
'.lswcdn.eu'],
'Level 3': ['.footprint.net',
'.fpbns.net'],
'Limelight': ['.llnwd.net',
'.llnw.net',
'.llnwi.net',
'.lldns.net'],
'MediaCloud': ['.cdncloud.net.au'],
'Medianova': ['.mncdn.com',
'.mncdn.net',
'.mncdn.org'],
'MerlinCDN': ['.merlincdn.net'],
'Microsoft Azure': ['.vo.msecnd.net',
'.azureedge.net',
'.azurefd.net',
'.azure.microsoft.com',
'-msedge.net'],
'Mirror Image': ['.instacontent.net',
'.mirror-image.net'],
'NetDNA': ['.netdna-cdn.com',
'.netdna-ssl.com',
'.netdna.com'],
'Netlify': ['.netlify.com'],
'Nexcess CDN': ['.nxedge.io',
'.nexcesscdn.net'],
'NGENIX': ['.ngenix.net'],
'NYI FTW': ['.nyiftw.net',
'.nyiftw.com'],
'OnApp': ['.r.worldcdn.net',
'.r.worldssl.net'],
'Optimal CDN': ['.optimalcdn.com'],
'PageCDN': ['pagecdn.io'],
'PageRain': ['.pagerain.net'],
'Parspack CDN': ['.parspack.net'],
'Pressable CDN': ['.pressablecdn.com'],
'PUSHR': ['.pushrcdn.com'],
'Rackspace': ['.raxcdn.com'],
'Reapleaf': ['.rlcdn.com'],
'Reflected Networks': ['.rncdn1.com',
'.rncdn7.com'],
'ReSRC.it': ['.resrc.it'],
'Rev Software': ['.revcn.net',
'.revdn.net'],
'Roast.io': ['.roast.io'],
'Rocket CDN': ['.streamprovider.net'],
'section.io': ['.section.io'],
'SFR': ['cdn.sfr.net'],
'Shift8 CDN': ['.shift8cdn.com'],
'Simple CDN': ['.simplecdn.net'],
'Singular CDN': ['.singularcdn.net.br'],
'Sirv CDN': ['.sirv.com'],
'StackPath': ['.stackpathdns.com'],
'SwiftCDN': ['.swiftcdn1.com',
'.swiftserve.com'],
'SwiftyCDN': ['.swiftycdn.net'],
'Taobao': ['.gslb.taobao.com',
'tbcdn.cn',
'.taobaocdn.com'],
'Telenor': ['.cdntel.net'],
'Tencent': ['.cdn.dnsv1.com',
'.cdn.dnsv1.com.cn',
'.dsa.dnsv1.com',
'.dsa.dnsv1.com.cn'],
'TRBCDN': ['.trbcdn.net'],
'Twitter': ['.twimg.com'],
'UnicornCDN': ['.unicorncdn.net'],
'Universal CDN': ['.cdn12.com',
'.cdn13.com',
'.cdn15.com'],
'VegaCDN': ['.vegacdn.vn',
'.vegacdn.com'],
'Vercel': ['.vercel.com',
'.zeit.co'],
'VoxCDN': ['.voxcdn.net'],
'WP Compress': ['.zapwp.com'],
'XLabs Security': ['.xlabs.com.br',
'.armor.zone'],
'Yahoo': ['.ay1.b.yahoo.com',
'.yimg.',
'.yahooapis.com',
'cdn.vidible.tv',
'cdn-ssl.vidible.tv'],
'Yottaa': ['.yottaa.net'],
'Zenedge': ['.zenedge.net']
}
self.cdn_headers = {
'Airee': [{'Server': 'Airee'}],
'Akamai': [{'x-akamai-staging': 'ESSL'},
{'x-akamai-request-id': ''}],
'Amazon CloudFront': [{'Via': 'CloudFront'}],
'Aryaka': [{'X-Ar-Debug': ''}],
'Azion' : [{'Server' : 'Azion Technologies'}],
'Baleen': [{'bln-version': ''}],
'BelugaCDN': [{'Server': 'Beluga'},
{'X-Beluga-Cache-Status': ''}],
'BunnyCDN': [{'Server': 'BunnyCDN'}],
'Caspowa': [{'Server': 'Caspowa'}],
'CDN': [{'X-Edge-IP': ''},
{'X-Edge-Location': ''}],
'CDN77': [{'Server': 'CDN77'}],
'CDNetworks': [{'X-Px': ''}],
'ChinaNetCenter': [{'X-Cache': 'cache.51cdn.com'}],
'Cloudflare': [{'Server': 'cloudflare'}],
'Edgecast': [{'Server': 'ECS'},
{'Server': 'ECAcc'},
{'Server': 'ECD'}],
'Erstream': [{'Server': 'ersRV'}],
'Fastly': [{'X-Served-By': 'cache-', 'X-Cache': ''},
{'Server-Timing': 'fastly'}],
'Fly': [{'Server': 'Fly.io'}],
'GoCache': [{'Server': 'gocache'}],
'Google': [{'Server': 'sffe'},
{'Server': 'gws'},
{'Server': 'ESF'},
{'Server': 'GSE'},
{'Server': 'Golfe2'},
{'Via': 'google'}],
'HiberniaCDN': [{'Server': 'hiberniacdn'}],
'Highwinds': [{'X-HW': ''}],
'Hosting4CDN': [{'x-cdn': 'H4CDN'}],
'ImageEngine': [{'Server': 'ScientiaMobile ImageEngine'}],
'Incapsula': [{'X-CDN': 'Incapsula'},
{'X-Iinfo': ''}],
'Instart Logic': [{'X-Instart-Request-ID': 'instart'}],
'LeaseWeb CDN': [{'Server': 'leasewebcdn'}],
'Medianova': [{'Server': 'MNCDN'}],
'MerlinCDN': [{'Server': 'MerlinCDN'}],
'Microsoft Azure': [{'x-azure-ref': ''},
{'x-azure-ref-originshield': ''}],
'Myra Security CDN': [{'Server': 'myracloud'}],
'Naver': [{'Server': 'Testa/'}],
'NetDNA': [{'Server': 'NetDNA'}],
'Netlify': [{'Server': 'Netlify'}],
'NGENIX': [{'x-ngenix-cache': ''}],
'NOC.org': [{'Server': 'noc.org/cdn'}],
'NYI FTW': [{'X-Powered-By': 'NYI FTW'},
{'X-Delivered-By': 'NYI FTW'}],
'Optimal CDN': [{'Server': 'Optimal CDN'}],
'OVH CDN': [{'X-CDN-Geo': ''},
{'X-CDN-Pop': ''}],
'PageCDN': [{'X-CDN': 'PageCDN'}],
'PUSHR': [{'Via': 'PUSHR'}],
'QUIC.cloud': [{'X-QC-POP': '', 'X-QC-Cache': ''}],
'ReSRC.it': [{'Server': 'ReSRC'}],
'Rev Software': [{'Via': 'Rev-Cache'},
{'X-Rev-Cache': ''}],
'Roast.io': [{'Server': 'Roast.io'}],
'Rocket CDN': [{'x-rocket-node': ''}],
'section.io': [{'section-io-id': ''}],
'SwiftyCDN': [{'X-CDN': 'SwiftyCDN'}],
'Singular CDN': [{'Server': 'SingularCDN'}],
'Sirv CDN': [{'x-sirv-server': ''}],
'Sucuri Firewall': [{'Server': 'Sucuri/Cloudproxy'},
{'x-sucuri-id': ''}],
'Surge': [{'Server': 'SurgeCDN'}],
'Twitter': [{'Server': 'tsa_b'}],
'UnicornCDN': [{'Server': 'UnicornCDN'}],
'Vercel': [{'Server': 'Vercel'},
{'Server': 'now'}],
'WP Compress': [{'Server': 'WPCompress'}],
'XLabs Security': [{'x-cdn': 'XLabs Security'}],
'Yunjiasu': [{'Server': 'yunjiasu'}],
'Zenedge': [{'X-Cdn': 'Zenedge'}],
'Zycada Networks': [{'Zy-Server': ''}]
}
# spell-checker: enable
def start(self):
"""Start running the optimization checks"""
logging.debug('Starting optimization checks...')
optimization_checks_disabled = bool('noopt' in self.job and self.job['noopt'])
if self.requests is not None and not optimization_checks_disabled:
self.running_checks = True
# Run the slow checks in background threads
self.cdn_thread = threading.Thread(target=self.check_cdn)
self.hosting_thread = threading.Thread(target=self.check_hosting)
self.gzip_thread = threading.Thread(target=self.check_gzip)
self.image_thread = threading.Thread(target=self.check_images)
self.progressive_thread = threading.Thread(target=self.check_progressive)
self.font_thread = threading.Thread(target=self.check_fonts)
self.wasm_thread = threading.Thread(target=self.check_wasm)
self.cdn_thread.start()
self.hosting_thread.start()
self.gzip_thread.start()
self.image_thread.start()
self.progressive_thread.start()
self.font_thread.start()
self.wasm_thread.start()
# collect the miscellaneous results directly
logging.debug('Checking keep-alive.')
self.check_keep_alive()
logging.debug('Checking caching.')
self.check_cache_static()
logging.debug('Optimization checks started.')
def join(self):
"""Wait for the optimization checks to complete and record the results"""
logging.debug('Waiting for optimization checks to complete')
if self.running_checks:
logging.debug('Waiting for progressive JPEG check to complete')
if self.progressive_thread is not None:
self.progressive_thread.join()
self.progressive_thread = None
if self.progressive_time is not None:
logging.debug("Progressive JPEG check took %0.3f seconds", self.progressive_time)
logging.debug('Waiting for gzip check to complete')
if self.gzip_thread is not None:
self.gzip_thread.join()
self.gzip_thread = None
if self.gzip_time is not None:
logging.debug("gzip check took %0.3f seconds", self.gzip_time)
logging.debug('Waiting for font check to complete')
if self.font_thread is not None:
self.font_thread.join()
self.font_thread = None
if self.font_time is not None:
logging.debug("font check took %0.3f seconds", self.font_time)
logging.debug('Waiting for wasm check to complete')
if self.wasm_thread is not None:
self.wasm_thread.join()
self.wasm_thread = None
if self.wasm_time is not None:
logging.debug("wasm check took %0.3f seconds", self.wasm_time)
logging.debug('Waiting for image check to complete')
if self.image_thread is not None:
self.image_thread.join()
self.image_thread = None
if self.image_time is not None:
logging.debug("image check took %0.3f seconds", self.image_time)
logging.debug('Waiting for CDN check to complete')
if self.cdn_thread is not None:
self.cdn_thread.join()
self.cdn_thread = None
if self.cdn_time is not None:
logging.debug("CDN check took %0.3f seconds", self.cdn_time)
logging.debug('Waiting for Hosting check to complete')
if self.hosting_thread is not None:
self.hosting_thread.join()
self.hosting_thread = None
if self.hosting_time is not None:
logging.debug("Hosting check took %0.3f seconds", self.hosting_time)
# Merge the results together
for request_id in self.cdn_results:
if request_id not in self.results:
self.results[request_id] = {}
self.results[request_id]['cdn'] = self.cdn_results[request_id]
for request_id in self.gzip_results:
if request_id not in self.results:
self.results[request_id] = {}
self.results[request_id]['gzip'] = self.gzip_results[request_id]
for request_id in self.image_results:
if request_id not in self.results:
self.results[request_id] = {}
self.results[request_id]['image'] = self.image_results[request_id]
for request_id in self.progressive_results:
if request_id not in self.results:
self.results[request_id] = {}
self.results[request_id]['progressive'] = self.progressive_results[request_id]
for request_id in self.font_results:
if request_id not in self.results:
self.results[request_id] = {}
self.results[request_id]['font'] = self.font_results[request_id]
for request_id in self.wasm_results:
if request_id not in self.results:
self.results[request_id] = {}
self.results[request_id]['wasm'] = self.wasm_results[request_id]
if self.task is not None and 'page_data' in self.task:
for name in self.hosting_results:
self.task['page_data'][name] = self.hosting_results[name]
# Save the results
if self.results:
path = os.path.join(self.task['dir'], self.task['prefix']) + '_optimization.json.gz'
gz_file = gzip.open(path, GZIP_TEXT, 7)
if gz_file:
gz_file.write(json.dumps(self.results))
gz_file.close()
logging.debug('Optimization checks complete')
return self.results
def check_keep_alive(self):
"""Check for requests where the connection is force-closed"""
self.profile_start('keep_alive')
if (sys.version_info >= (3, 0)):
from urllib.parse import urlsplit # pylint: disable=import-error
else:
from urlparse import urlsplit # pylint: disable=import-error
# build a list of origins and how many requests were issued to each
origins = {}
for request_id in self.requests:
request = self.requests[request_id]
if 'url' in request:
url = request['full_url'] if 'full_url' in request else request['url']
parsed = urlsplit(url)
origin = parsed.scheme + '://' + parsed.netloc
if origin not in origins:
origins[origin] = 0
origins[origin] += 1
for request_id in self.requests:
try:
request = self.requests[request_id]
if 'url' in request and 'response_headers' in request:
check = {'score': 100}
url = request['full_url'] if 'full_url' in request else request['url']
parsed = urlsplit(url)
origin = parsed.scheme + '://' + parsed.netloc
if origins[origin] > 1:
check['score'] = 100
keep_alive = self.get_header_value(request['response_headers'], 'Connection')
if keep_alive is not None and keep_alive.lower().strip().find('close') > -1:
check['score'] = 0
if request_id not in self.results:
self.results[request_id] = {}
self.results[request_id]['keep_alive'] = check
except Exception:
logging.exception('Error checking keep-alive')
self.profile_end('keep_alive')
def get_time_remaining(self, request):
"""See if a request is static and how long it can be cached for"""
from email.utils import parsedate
re_max_age = re.compile(r'max-age[ ]*=[ ]*(?P<maxage>[\d]+)')
is_static = False
time_remaining = -1
try:
if 'response_headers' in request:
content_length = self.get_header_value(request['response_headers'],
'Content-Length')
if content_length is not None:
content_length = int(re.search(r'\d+', str(content_length)).group())
if content_length == 0:
return is_static, time_remaining
if 'response_headers' in request:
content_type = self.get_header_value(request['response_headers'],
'Content-Type')
if content_type is None or \
(content_type.find('/html') == -1 and
content_type.find('/cache-manifest') == -1):
is_static = True
cache = self.get_header_value(request['response_headers'], 'Cache-Control')
pragma = self.get_header_value(request['response_headers'], 'Pragma')
expires = self.get_header_value(request['response_headers'], 'Expires')
max_age_matches = None
if cache is not None:
max_age_matches = re.search(re_max_age, cache)
cache = cache.lower()
if cache.find('no-store') > -1 or cache.find('no-cache') > -1:
is_static = False
if is_static and pragma is not None:
pragma = pragma.lower()
if pragma.find('no-cache') > -1:
is_static = False
if is_static:
time_remaining = 0
if max_age_matches is not None:
time_remaining = int(max_age_matches.groupdict().get('maxage'))
age = self.get_header_value(request['response_headers'], 'Age')
if time_remaining == 0:
is_static = False
time_remaining = -1
elif age is not None:
time_remaining -= int(re.search(r'\d+',
str(age).strip()).group())
elif expires is not None:
date = self.get_header_value(request['response_headers'], 'Date')
exp = time.mktime(parsedate(expires))
if date is not None:
now = time.mktime(parsedate(date))
else:
now = time.time()
time_remaining = int(exp - now)
if time_remaining < 0:
is_static = False
except Exception:
logging.exception('Error calculating time remaining')
return is_static, time_remaining
def check_cache_static(self):
"""Check static resources for how long they are cacheable for"""
self.profile_start('cache_static')
for request_id in self.requests:
try:
request = self.requests[request_id]
check = {'score': -1, 'time': 0}
if 'status' in request and request['status'] == 200:
is_static, time_remaining = self.get_time_remaining(request)
if is_static:
check['time'] = time_remaining
if time_remaining >= 604800: # 7 days
check['score'] = 100
elif time_remaining >= 3600: # 1 hour
check['score'] = 50
else:
check['score'] = 0
if check['score'] >= 0:
if request_id not in self.results:
self.results[request_id] = {}
self.results[request_id]['cache'] = check
except Exception:
logging.exception('Error checking cache static')
self.profile_end('cache_static')
def check_hosting(self):
"""Pull the data needed to determine the hosting"""
self.profile_start('hosting')
start = monotonic()
self.hosting_results['base_page_ip_ptr'] = ''
self.hosting_results['base_page_cname'] = ''
self.hosting_results['base_page_dns_server'] = ''
domain = None
if self.task is not None and 'page_data' in self.task and \
'document_hostname' in self.task['page_data']:
domain = self.task['page_data']['document_hostname']
if domain is not None:
try:
from dns import resolver, reversename
dns_resolver = resolver.Resolver()
dns_resolver.timeout = 1
dns_resolver.lifetime = 1
# reverse-lookup the edge server
try:
addresses = dns_resolver.query(domain)
if addresses:
addr = str(addresses[0])
addr_name = reversename.from_address(addr)
if addr_name:
name = str(dns_resolver.query(addr_name, "PTR")[0])
if name:
self.hosting_results['base_page_ip_ptr'] = name.strip('. ')
except Exception:
pass
# get the CNAME for the address
try:
answers = dns_resolver.query(domain, 'CNAME')
if answers and len(answers):
for rdata in answers:
name = '.'.join(rdata.target).strip(' .')
if name != domain:
self.hosting_results['base_page_cname'] = name
break
except Exception:
pass
# get the name server for the domain
done = False
while domain is not None and not done:
try:
dns_servers = dns_resolver.query(domain, "NS")
dns_name = str(dns_servers[0].target).strip('. ')
if dns_name:
self.hosting_results['base_page_dns_server'] = dns_name
done = True
except Exception:
pass
pos = domain.find('.')
if pos > 0:
domain = domain[pos + 1:]
else:
domain = None
except Exception:
logging.exception('Error checking hosting')
self.hosting_time = monotonic() - start
self.profile_end('hosting')
def check_cdn(self):
"""Check each request to see if it was served from a CDN"""
if (sys.version_info >= (3, 0)):
from urllib.parse import urlparse # pylint: disable=import-error
else:
from urlparse import urlparse # pylint: disable=import-error
self.profile_start('cdn')
start = monotonic()
# First pass, build a list of domains and see if the headers or domain matches
static_requests = {}
domains = {}
for request_id in self.requests:
request = self.requests[request_id]
is_static, _ = self.get_time_remaining(request)
if is_static:
static_requests[request_id] = True
if 'url' in request:
url = request['full_url'] if 'full_url' in request else request['url']
domain = urlparse(url).hostname
if domain is not None:
if domain not in domains:
# Check the domain itself against the CDN list
domains[domain] = ''
provider = self.check_cdn_name(domain)
if provider is not None:
domains[domain] = provider
# Spawn several workers to do CNAME lookups for the unknown domains
count = 0
for domain in domains:
if not domains[domain]:
count += 1
self.dns_lookup_queue.put(domain)
if count:
thread_count = min(10, count)
threads = []
for _ in range(thread_count):
self.dns_lookup_queue.put(None)
for _ in range(thread_count):
thread = threading.Thread(target=self.dns_worker)
thread.start()
threads.append(thread)
for thread in threads:
thread.join()
try:
while True:
dns_result = self.dns_result_queue.get(5)
if dns_result is None:
thread_count -= 1
self.dns_result_queue.task_done()
if thread_count == 0:
break
else:
domains[dns_result['domain']] = dns_result['provider']
self.dns_result_queue.task_done()
except Exception:
logging.exception("Error getting CDN DNS results")
# Final pass, populate the CDN info for each request
for request_id in self.requests:
check = {'score': -1, 'provider': ''}
request = self.requests[request_id]
if request_id in static_requests:
check['score'] = 0
if 'url' in request:
url = request['full_url'] if 'full_url' in request else request['url']
domain = urlparse(url).hostname
if domain is not None:
if domain in domains and domains[domain]:
check['score'] = 100
check['provider'] = domains[domain]
if not check['provider'] and 'response_headers' in request:
provider = self.check_cdn_headers(request['response_headers'])
if provider is not None:
check['score'] = 100
check['provider'] = provider
self.cdn_results[request_id] = check
self.cdn_time = monotonic() - start
self.profile_end('cdn')
def find_dns_cdn(self, domain, depth=0):
"""Recursively check a CNAME chain"""
from dns import resolver, reversename
dns_resolver = resolver.Resolver()
dns_resolver.timeout = 5
dns_resolver.lifetime = 5
provider = self.check_cdn_name(domain)
# First do a CNAME check
if provider is None:
try:
answers = dns_resolver.query(domain, 'CNAME')
if answers and len(answers):
for rdata in answers:
try:
name = str(rdata.target).strip(' .')
logging.debug("CNAME %s => %s", domain, name)
if name != domain:
provider = self.check_cdn_name(name)
if provider is None and depth < 10:
provider = self.find_dns_cdn(name, depth + 1)
if provider is not None:
logging.debug("provider %s => %s", domain, provider)
break
except Exception:
pass
except Exception:
pass
# Try a reverse-lookup of the address
if provider is None:
try:
addresses = dns_resolver.query(domain)
if addresses:
addr = str(addresses[0])
logging.debug("PTR %s => %s", domain, addr)
addr_name = reversename.from_address(addr)
if addr_name:
name = str(dns_resolver.query(addr_name, "PTR")[0])
logging.debug("PTR %s => %s => %s", domain, addr, name)
if name:
provider = self.check_cdn_name(name)
except Exception:
pass
return provider
def dns_worker(self):
"""Handle the DNS CNAME lookups and checking in multiple threads"""
try:
while True:
domain = self.dns_lookup_queue.get(5)
if domain is None:
self.dns_lookup_queue.task_done()
self.dns_result_queue.put(None)
break
else:
try:
provider = self.find_dns_cdn(domain)
if provider is not None:
self.dns_result_queue.put({'domain': domain, 'provider': provider})
except Exception:
logging.debug('Error in dns worker')
self.dns_lookup_queue.task_done()
except Exception:
pass
def check_cdn_name(self, domain):
"""Check the given domain against our cname list"""
if domain is not None and len(domain):
check_name = domain.lower()
for cdn in self.cdn_cnames:
for cname in self.cdn_cnames[cdn]:
if check_name.find(cname) > -1:
return cdn
return None
def check_cdn_headers(self, headers):
"""Check the given headers against our header list"""
matched_cdns = []
for cdn in self.cdn_headers:
for header_group in self.cdn_headers[cdn]:
all_match = True
for name in header_group:
value = self.get_header_value(headers, name)
if value is None:
all_match = False
break
else:
value = value.lower()
check = header_group[name].lower()
if len(check) and value.find(check) == -1:
all_match = False
break
if all_match:
matched_cdns.append(cdn)
break
if not len(matched_cdns):
return None
return ', '.join(matched_cdns)
def check_gzip(self):
"""Check each request to see if it can be compressed"""
self.profile_start('gzip')
start = monotonic()
for request_id in self.requests:
try:
request = self.requests[request_id]
content_length = None
if 'response_headers' in request:
content_length = self.get_header_value(request['response_headers'], 'Content-Length')
if 'objectSize' in request:
content_length = request['objectSize']
elif content_length is not None:
content_length = int(re.search(r'\d+', str(content_length)).group())
elif 'transfer_size' in request:
content_length = request['transfer_size']
if content_length is None:
content_length = 0
check = {'score': 0, 'size': content_length, 'target_size': content_length}
encoding = None
if 'response_headers' in request:
encoding = self.get_header_value(request['response_headers'],
'Content-Encoding')
# Check for responses that are already compressed (ignore the level)
if encoding is not None:
if encoding.find('gzip') >= 0 or \
encoding.find('deflate') >= 0 or \
encoding.find('br') >= 0:
check['score'] = 100
# Ignore small responses that will fit in a packet
if not check['score'] and content_length < 1400:
check['score'] = -1
if 'body' not in request:
check['score'] = -1
# Try compressing it if it isn't an image or known binary
if not check['score']:
sniff_type = self.sniff_file_content(request['body'])
if sniff_type is not None:
check['score'] = -1
else:
out_file = request['body'] + '.gzip'
with open(request['body'], 'rb') as f_in:
with gzip.open(out_file, 'wb', 7) as f_out:
shutil.copyfileobj(f_in, f_out)
if os.path.isfile(out_file):
target_size = os.path.getsize(out_file)
try:
os.remove(out_file)
except Exception:
pass
if target_size is not None:
delta = content_length - target_size
# Only count it if there is at least 1 packet and 10% savings
if target_size > 0 and \
delta > 1400 and \
target_size < (content_length * 0.9):
check['target_size'] = target_size
check['score'] = int(target_size * 100 / content_length)
else:
check['score'] = -1
else:
check['score'] = -1
else:
check['score'] = -1
if check['score'] >= 0:
self.gzip_results[request_id] = check
except Exception:
logging.exception('Error checking gzip')
self.gzip_time = monotonic() - start
self.profile_end('gzip')
def check_images(self):
"""Check each request to see if images can be compressed better"""
self.profile_start('images')
start = monotonic()
for request_id in self.requests:
try:
request = self.requests[request_id]
content_length = None
if 'response_headers' in request:
content_length = self.get_header_value(request['response_headers'], 'Content-Length')
if content_length is not None:
content_length = int(re.search(r'\d+', str(content_length)).group())
elif 'transfer_size' in request:
content_length = request['transfer_size']
if 'body' in request:
sniff_type = self.sniff_file_content(request['body'])
if sniff_type in ['jpeg', 'png', 'gif', 'webp', 'avif', 'jxl']:
if sniff_type is None:
sniff_type = 'Unknown'
check = {'score': -1,
'size': content_length,
'target_size': content_length,
'info': {
'detected_type': sniff_type
}}
# Use exiftool to extract the image metadata if it is installed
try:
metadata = json.loads(subprocess.check_output(['exiftool', '-j', '-g', request['body']], encoding='UTF-8'))
if metadata is not None:
if isinstance(metadata, list) and len(metadata) == 1:
metadata = metadata[0]
if 'SourceFile' in metadata:
del metadata['SourceFile']
if 'File' in metadata:
for key in ['FileName', 'Directory', 'FileModifyDate', 'FileAccessDate', 'FileInodeChangeDate', 'FilePermissions']:
if key in metadata['File']:
del metadata['File'][key]
check['info']['metadata'] = metadata
except Exception:
pass
# Use imagemagick to convert metadata to json
try:
command = '{0} "{1}[0]" json:-'.format(self.job['image_magick']['convert'], request['body'])
subprocess.call(command, shell=True)
magick_str = subprocess.check_output(command, shell=True, encoding='UTF-8')