mirror of
https://github.com/searxng/searxng.git
synced 2024-11-27 13:21:04 +00:00
144 lines
4.1 KiB
Python
144 lines
4.1 KiB
Python
'''
|
|
searx is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU Affero General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
searx is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU Affero General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Affero General Public License
|
|
along with searx. If not, see < http://www.gnu.org/licenses/ >.
|
|
|
|
(C) 2013- by Adam Tauber, <asciimoo@gmail.com>
|
|
'''
|
|
|
|
import re
|
|
from lxml import etree
|
|
from os import listdir
|
|
from os.path import isfile, join
|
|
|
|
|
|
# https://gitweb.torproject.org/\
|
|
# pde/https-everywhere.git/tree/4.0:/src/chrome/content/rules
|
|
|
|
# HTTPS rewrite rules
|
|
https_rules = []
|
|
|
|
|
|
# load single ruleset from a xml file
|
|
def load_single_https_ruleset(filepath):
|
|
ruleset = ()
|
|
|
|
# init parser
|
|
parser = etree.XMLParser()
|
|
|
|
# load and parse xml-file
|
|
try:
|
|
tree = etree.parse(filepath, parser)
|
|
except:
|
|
# TODO, error message
|
|
return ()
|
|
|
|
# get root node
|
|
root = tree.getroot()
|
|
|
|
# check if root is a node with the name ruleset
|
|
# TODO improve parsing
|
|
if root.tag != 'ruleset':
|
|
return ()
|
|
|
|
# check if rule is deactivated by default
|
|
if root.attrib.get('default_off'):
|
|
return ()
|
|
|
|
# check if rule does only work for specific platforms
|
|
if root.attrib.get('platform'):
|
|
return ()
|
|
|
|
hosts = []
|
|
rules = []
|
|
exclusions = []
|
|
|
|
# parse childs from ruleset
|
|
for ruleset in root:
|
|
# this child define a target
|
|
if ruleset.tag == 'target':
|
|
# check if required tags available
|
|
if not ruleset.attrib.get('host'):
|
|
continue
|
|
|
|
# convert host-rule to valid regex
|
|
host = ruleset.attrib.get('host')\
|
|
.replace('.', '\.').replace('*', '.*')
|
|
|
|
# append to host list
|
|
hosts.append(host)
|
|
|
|
# this child define a rule
|
|
elif ruleset.tag == 'rule':
|
|
# check if required tags available
|
|
if not ruleset.attrib.get('from')\
|
|
or not ruleset.attrib.get('to'):
|
|
continue
|
|
|
|
# TODO hack, which convert a javascript regex group
|
|
# into a valid python regex group
|
|
rule_from = ruleset.attrib.get('from').replace('$', '\\')
|
|
rule_to = ruleset.attrib.get('to').replace('$', '\\')
|
|
|
|
# TODO, not working yet because of the hack above,
|
|
# currently doing that in webapp.py
|
|
# rule_from_rgx = re.compile(rule_from, re.I)
|
|
|
|
# append rule
|
|
rules.append((rule_from, rule_to))
|
|
|
|
# this child define an exclusion
|
|
elif ruleset.tag == 'exclusion':
|
|
# check if required tags available
|
|
if not ruleset.attrib.get('pattern'):
|
|
continue
|
|
|
|
exclusion_rgx = re.compile(ruleset.attrib.get('pattern'))
|
|
|
|
# append exclusion
|
|
exclusions.append(exclusion_rgx)
|
|
|
|
# convert list of possible hosts to a simple regex
|
|
# TODO compress regex to improve performance
|
|
try:
|
|
target_hosts = re.compile('^(' + '|'.join(hosts) + ')', re.I | re.U)
|
|
except:
|
|
return ()
|
|
|
|
# return ruleset
|
|
return (target_hosts, rules, exclusions)
|
|
|
|
|
|
# load all https rewrite rules
|
|
def load_https_rules(rules_path):
|
|
# add / to path if not set yet
|
|
if rules_path[-1:] != '/':
|
|
rules_path += '/'
|
|
|
|
# search all xml files which are stored in the https rule directory
|
|
xml_files = [join(rules_path, f)
|
|
for f in listdir(rules_path)
|
|
if isfile(join(rules_path, f)) and f[-4:] == '.xml']
|
|
|
|
# load xml-files
|
|
for ruleset_file in xml_files:
|
|
# calculate rewrite-rules
|
|
ruleset = load_single_https_ruleset(ruleset_file)
|
|
|
|
# skip if no ruleset returned
|
|
if not ruleset:
|
|
continue
|
|
|
|
# append ruleset
|
|
https_rules.append(ruleset)
|
|
|
|
print(' * {n} https-rules loaded'.format(n=len(https_rules)))
|