mirror of https://github.com/searxng/searxng.git
Implementing https rewrite support #71
* parsing XML-Files which contain target, exclusions and rules * convert regex if required (is a little hack, probably does not work for all rules) * check if target rule apply for http url, and use the rules to rewrite it * add pice of code, to check if domain name has not changed during rewrite (should be rewritten, using publicsuffix instead of little hack)
This commit is contained in:
Thomas Pointhuber
parent
d1d55f2ca4
commit
9b9f097adb
|
|
@ -1,5 +1,6 @@
|
|||
from os import environ
|
||||
from os.path import realpath, dirname, join, abspath
|
||||
from searx.https_rewrite import load_https_rules
|
||||
try:
|
||||
from yaml import load
|
||||
except:
|
||||
|
|
@ -15,6 +16,13 @@ if 'SEARX_SETTINGS_PATH' in environ:
|
|||
else:
|
||||
settings_path = join(searx_dir, 'settings.yml')
|
||||
|
||||
if 'SEARX_HTTPS_REWRITE_PATH' in environ:
|
||||
https_rewrite_path = environ['SEARX_HTTPS_REWRITE_PATH']
|
||||
else:
|
||||
https_rewrite_path = join(searx_dir, 'https_rules')
|
||||
|
||||
with open(settings_path) as settings_yaml:
|
||||
settings = load(settings_yaml)
|
||||
|
||||
# loade https rules
|
||||
load_https_rules(https_rewrite_path)
|
||||
|
|
|
|||
|
|
@ -1,14 +1,139 @@
|
|||
'''
|
||||
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 = (
|
||||
# from
|
||||
(re.compile(r'^http://(www\.|m\.|)?xkcd\.(?:com|org)/', re.I | re.U),
|
||||
# to
|
||||
r'https://\1xkcd.com/'),
|
||||
(re.compile(r'^https?://(?:ssl)?imgs\.xkcd\.com/', re.I | re.U),
|
||||
r'https://sslimgs.xkcd.com/'),
|
||||
)
|
||||
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()
|
||||
|
||||
#print(etree.tostring(tree))
|
||||
|
||||
# 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)
|
||||
|
|
|
|||
|
|
@ -49,6 +49,9 @@ from searx.languages import language_codes
|
|||
from searx.search import Search
|
||||
from searx.autocomplete import backends as autocomplete_backends
|
||||
|
||||
from urlparse import urlparse
|
||||
import re
|
||||
|
||||
|
||||
static_path, templates_path, themes =\
|
||||
get_themes(settings['themes_path']
|
||||
|
|
@ -197,16 +200,53 @@ def index():
|
|||
if not search.paging and engines[result['engine']].paging:
|
||||
search.paging = True
|
||||
|
||||
# check if HTTPS rewrite is required
|
||||
if settings['server']['https_rewrite']\
|
||||
and result['parsed_url'].scheme == 'http':
|
||||
|
||||
for http_regex, https_url in https_rules:
|
||||
if http_regex.match(result['url']):
|
||||
result['url'] = http_regex.sub(https_url, result['url'])
|
||||
# TODO result['parsed_url'].scheme
|
||||
skip_https_rewrite = False
|
||||
|
||||
# check if HTTPS rewrite is possible
|
||||
for target, rules, exclusions in https_rules:
|
||||
|
||||
# check if target regex match with url
|
||||
if target.match(result['url']):
|
||||
# process exclusions
|
||||
for exclusion in exclusions:
|
||||
# check if exclusion match with url
|
||||
if exclusion.match(result['url']):
|
||||
skip_https_rewrite = True
|
||||
break
|
||||
|
||||
# HTTPS rewrite
|
||||
# skip https rewrite if required
|
||||
if skip_https_rewrite:
|
||||
break
|
||||
|
||||
# process rules
|
||||
for rule in rules:
|
||||
# TODO, precompile rule
|
||||
p = re.compile(rule[0])
|
||||
# rewrite url if possible
|
||||
new_result_url = p.sub(rule[1], result['url'])
|
||||
|
||||
# parse new url
|
||||
new_parsed_url = urlparse(new_result_url)
|
||||
|
||||
# continiue if nothing was rewritten
|
||||
if result['url'] == new_result_url:
|
||||
continue
|
||||
|
||||
# get domainname from result
|
||||
# TODO, does only work correct with TLD's like asdf.com, not for asdf.com.de
|
||||
# TODO, using publicsuffix instead of this rewrite rule
|
||||
old_result_domainname = '.'.join(result['parsed_url'].hostname.split('.')[-2:])
|
||||
new_result_domainname = '.'.join(new_parsed_url.hostname.split('.')[-2:])
|
||||
|
||||
# check if rewritten hostname is the same, to protect against wrong or malicious rewrite rules
|
||||
if old_result_domainname == new_result_domainname:
|
||||
# set new url
|
||||
result['url'] = new_result_url
|
||||
|
||||
if search.request_data.get('format', 'html') == 'html':
|
||||
if 'content' in result:
|
||||
result['content'] = highlight_content(result['content'],
|
||||
|
|
|
|||
Loading…
Reference in New Issue