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[mod][fix] https rewrite refactor ++ fixes

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This commit is contained in:
Adam Tauber 2014-12-19 22:40:37 +01:00
parent 813247b37a
commit f141773814
3 changed files with 68 additions and 61 deletions
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68
searx/https_rewrite.py
View file

@ -16,6 +16,7 @@ along with searx. If not, see < http://www.gnu.org/licenses/ >.
'''
import re
from urlparse import urlparse
from lxml import etree
from os import listdir
from os.path import isfile, isdir, join
@ -86,15 +87,23 @@ def load_single_https_ruleset(filepath):
# TODO hack, which convert a javascript regex group
# into a valid python regex group
rule_from = ruleset.attrib.get('from').replace('$', '\\')
rule_to = ruleset.attrib.get('to').replace('$', '\\')
rule_from = ruleset.attrib['from'].replace('$', '\\')
if rule_from.endswith('\\'):
rule_from = rule_from[:-1]+'$'
rule_to = ruleset.attrib['to'].replace('$', '\\')
if rule_to.endswith('\\'):
rule_to = rule_to[:-1]+'$'
# 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))
try:
rules.append((re.compile(rule_from, re.I | re.U), rule_to))
except:
# TODO log regex error
continue
# this child define an exclusion
elif ruleset.tag == 'exclusion':
@ -143,3 +152,56 @@ def load_https_rules(rules_path):
https_rules.append(ruleset)
print(' * {n} https-rules loaded'.format(n=len(https_rules)))
def https_url_rewrite(result):
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['parsed_url'].netloc):
# process exclusions
for exclusion in exclusions:
# check if exclusion match with url
if exclusion.match(result['url']):
skip_https_rewrite = True
break
# skip https rewrite if required
if skip_https_rewrite:
break
# process rules
for rule in rules:
try:
new_result_url = rule[0].sub(rule[1], result['url'])
except:
break
# 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
# target has matched, do not search over the other rules
break
return result

2
searx/https_rules/Soundcloud.xml
View file

@ -89,7 +89,7 @@
<rule from="^http://([aiw]\d|api|wis)\.sndcdn\.com/"
to="https://$1.sndcdn.com/" />
<rule from="^http://((?:api|backstage|blog|connect|developers|ec-media|eventlogger|help-assets|media|visuals|w|www)\.)?soundcloud\.com/"
<rule from="^http://((?:api|backstage|blog|connect|developers|ec-media|eventlogger|help-assets|media|visuals|w|www)\.|)soundcloud\.com/"
to="https://$1soundcloud.com/" />
<rule from="^https?://scbackstage\.wpengine\.netdna-cdn\.com/"

59
searx/webapp.py
View file

@ -41,15 +41,12 @@ from searx.utils import (
UnicodeWriter, highlight_content, html_to_text, get_themes
)
from searx.version import VERSION_STRING
from searx.https_rewrite import https_rules
from searx.languages import language_codes
from searx.https_rewrite import https_url_rewrite
from searx.search import Search
from searx.query import Query
from searx.autocomplete import backends as autocomplete_backends
from urlparse import urlparse
import re
static_path, templates_path, themes =\
get_themes(settings['themes_path']
@ -215,59 +212,7 @@ def index():
if settings['server']['https_rewrite']\
and result['parsed_url'].scheme == 'http':
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
# skip https rewrite if required
if skip_https_rewrite:
break
# process rules
for rule in rules:
try:
# TODO, precompile rule
p = re.compile(rule[0])
# rewrite url if possible
new_result_url = p.sub(rule[1], result['url'])
except:
break
# 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
# target has matched, do not search over the other rules
break
result = https_url_rewrite(result)
if search.request_data.get('format', 'html') == 'html':
if 'content' in result: