Merge branch 'master' into libgen

1 files changed, 33 insertions, 2 deletions

diff --git a/searx/utils.py b/searx/utils.py
index d88bc9897..5ea9dc89c 100644
--- a/searx/utils.py
+++ b/searx/utils.py
@@ -13,6 +13,7 @@ from numbers import Number
 from os.path import splitext, join
 from io import open
 from random import choice
+from lxml.etree import XPath
 import sys
 import json
 
@@ -51,6 +52,7 @@ ecma_unescape2_re = re.compile(r'%([0-9a-fA-F]{2})', re.UNICODE)
 useragents = json.loads(open(os.path.dirname(os.path.realpath(__file__))
                              + "/data/useragents.json", 'r', encoding='utf-8').read())
 
+xpath_cache = dict()
 lang_to_lc_cache = dict()
 
 
@@ -308,14 +310,15 @@ def int_or_zero(num):
 
 def is_valid_lang(lang):
     is_abbr = (len(lang) == 2)
+    lang = lang.lower().decode('utf-8')
     if is_abbr:
         for l in language_codes:
-            if l[0][:2] == lang.lower():
+            if l[0][:2] == lang:
                 return (True, l[0][:2], l[3].lower())
         return False
     else:
         for l in language_codes:
-            if l[1].lower() == lang.lower():
+            if l[1].lower() == lang or l[3].lower() == lang:
                 return (True, l[0][:2], l[3].lower())
         return False
 
@@ -434,3 +437,31 @@ def ecma_unescape(s):
     # "%20" becomes " ", "%F3" becomes "ó"
     s = ecma_unescape2_re.sub(lambda e: unichr(int(e.group(1), 16)), s)
     return s
+
+
+def get_engine_from_settings(name):
+    """Return engine configuration from settings.yml of a given engine name"""
+
+    if 'engines' not in settings:
+        return {}
+
+    for engine in settings['engines']:
+        if 'name' not in engine:
+            continue
+        if name == engine['name']:
+            return engine
+
+    return {}
+
+
+def get_xpath(xpath_str):
+    result = xpath_cache.get(xpath_str, None)
+    if result is None:
+        result = XPath(xpath_str)
+        xpath_cache[xpath_str] = result
+    return result
+
+
+def eval_xpath(element, xpath_str):
+    xpath = get_xpath(xpath_str)
+    return xpath(element)