mirror of
https://github.com/searxng/searxng.git
synced 2025-09-04 01:08:33 +02:00
335 lines
12 KiB
Python
335 lines
12 KiB
Python
# SPDX-License-Identifier: AGPL-3.0-or-later
|
|
# pylint: disable=missing-module-docstring, invalid-name
|
|
|
|
|
|
import os
|
|
import pathlib
|
|
import csv
|
|
import hashlib
|
|
import hmac
|
|
import re
|
|
import itertools
|
|
import json
|
|
from datetime import datetime, timedelta
|
|
from typing import Iterable, List, Tuple, TYPE_CHECKING
|
|
|
|
from io import StringIO
|
|
from codecs import getincrementalencoder
|
|
|
|
from flask_babel import gettext, format_date # type: ignore
|
|
|
|
from searx import logger, get_setting
|
|
|
|
from searx.engines import DEFAULT_CATEGORY
|
|
|
|
if TYPE_CHECKING:
|
|
from searx.enginelib import Engine
|
|
from searx.results import ResultContainer
|
|
from searx.search import SearchQuery
|
|
from searx.results import UnresponsiveEngine
|
|
|
|
VALID_LANGUAGE_CODE = re.compile(r'^[a-z]{2,3}(-[a-zA-Z]{2})?$')
|
|
|
|
logger = logger.getChild('webutils')
|
|
|
|
timeout_text = gettext('timeout')
|
|
parsing_error_text = gettext('parsing error')
|
|
http_protocol_error_text = gettext('HTTP protocol error')
|
|
network_error_text = gettext('network error')
|
|
ssl_cert_error_text = gettext("SSL error: certificate validation has failed")
|
|
exception_classname_to_text = {
|
|
None: gettext('unexpected crash'),
|
|
'timeout': timeout_text,
|
|
'asyncio.TimeoutError': timeout_text,
|
|
'httpx.TimeoutException': timeout_text,
|
|
'httpx.ConnectTimeout': timeout_text,
|
|
'httpx.ReadTimeout': timeout_text,
|
|
'httpx.WriteTimeout': timeout_text,
|
|
'httpx.HTTPStatusError': gettext('HTTP error'),
|
|
'httpx.ConnectError': gettext("HTTP connection error"),
|
|
'httpx.RemoteProtocolError': http_protocol_error_text,
|
|
'httpx.LocalProtocolError': http_protocol_error_text,
|
|
'httpx.ProtocolError': http_protocol_error_text,
|
|
'httpx.ReadError': network_error_text,
|
|
'httpx.WriteError': network_error_text,
|
|
'httpx.ProxyError': gettext("proxy error"),
|
|
'searx.exceptions.SearxEngineCaptchaException': gettext("CAPTCHA"),
|
|
'searx.exceptions.SearxEngineTooManyRequestsException': gettext("too many requests"),
|
|
'searx.exceptions.SearxEngineAccessDeniedException': gettext("access denied"),
|
|
'searx.exceptions.SearxEngineAPIException': gettext("server API error"),
|
|
'searx.exceptions.SearxEngineXPathException': parsing_error_text,
|
|
'KeyError': parsing_error_text,
|
|
'json.decoder.JSONDecodeError': parsing_error_text,
|
|
'lxml.etree.ParserError': parsing_error_text,
|
|
'ssl.SSLCertVerificationError': ssl_cert_error_text, # for Python > 3.7
|
|
'ssl.CertificateError': ssl_cert_error_text, # for Python 3.7
|
|
}
|
|
|
|
|
|
def get_translated_errors(unresponsive_engines: "Iterable[UnresponsiveEngine]"):
|
|
translated_errors = []
|
|
|
|
for unresponsive_engine in unresponsive_engines:
|
|
error_user_text = exception_classname_to_text.get(unresponsive_engine.error_type)
|
|
if not error_user_text:
|
|
error_user_text = exception_classname_to_text[None]
|
|
error_msg = gettext(error_user_text)
|
|
if unresponsive_engine.suspended:
|
|
error_msg = gettext('Suspended') + ': ' + error_msg
|
|
translated_errors.append((unresponsive_engine.engine, error_msg))
|
|
|
|
return sorted(translated_errors, key=lambda e: e[0])
|
|
|
|
|
|
class CSVWriter:
|
|
"""A CSV writer which will write rows to CSV file "f", which is encoded in
|
|
the given encoding."""
|
|
|
|
def __init__(self, f, dialect=csv.excel, encoding="utf-8", **kwds):
|
|
# Redirect output to a queue
|
|
self.queue = StringIO()
|
|
self.writer = csv.writer(self.queue, dialect=dialect, **kwds)
|
|
self.stream = f
|
|
self.encoder = getincrementalencoder(encoding)()
|
|
|
|
def writerow(self, row):
|
|
self.writer.writerow(row)
|
|
# Fetch UTF-8 output from the queue ...
|
|
data = self.queue.getvalue()
|
|
data = data.strip('\x00')
|
|
# ... and re-encode it into the target encoding
|
|
data = self.encoder.encode(data)
|
|
# write to the target stream
|
|
self.stream.write(data.decode())
|
|
# empty queue
|
|
self.queue.truncate(0)
|
|
|
|
def writerows(self, rows):
|
|
for row in rows:
|
|
self.writerow(row)
|
|
|
|
|
|
def write_csv_response(csv: CSVWriter, rc: "ResultContainer") -> None: # pylint: disable=redefined-outer-name
|
|
"""Write rows of the results to a query (``application/csv``) into a CSV
|
|
table (:py:obj:`CSVWriter`). First line in the table contain the column
|
|
names. The column "type" specifies the type, the following types are
|
|
included in the table:
|
|
|
|
- result
|
|
- answer
|
|
- suggestion
|
|
- correction
|
|
|
|
"""
|
|
|
|
keys = ('title', 'url', 'content', 'host', 'engine', 'score', 'type')
|
|
csv.writerow(keys)
|
|
|
|
for res in rc.get_ordered_results():
|
|
row = res.as_dict()
|
|
row['host'] = row['parsed_url'].netloc
|
|
row['type'] = 'result'
|
|
csv.writerow([row.get(key, '') for key in keys])
|
|
|
|
for a in rc.answers:
|
|
row = a.as_dict()
|
|
row['host'] = row['parsed_url'].netloc
|
|
csv.writerow([row.get(key, '') for key in keys])
|
|
|
|
for a in rc.suggestions:
|
|
row = {'title': a, 'type': 'suggestion'}
|
|
csv.writerow([row.get(key, '') for key in keys])
|
|
|
|
for a in rc.corrections:
|
|
row = {'title': a, 'type': 'correction'}
|
|
csv.writerow([row.get(key, '') for key in keys])
|
|
|
|
|
|
class JSONEncoder(json.JSONEncoder): # pylint: disable=missing-class-docstring
|
|
def default(self, o):
|
|
if isinstance(o, datetime):
|
|
return o.isoformat()
|
|
if isinstance(o, timedelta):
|
|
return o.total_seconds()
|
|
if isinstance(o, set):
|
|
return list(o)
|
|
return super().default(o)
|
|
|
|
|
|
def get_json_response(sq: "SearchQuery", rc: "ResultContainer") -> str:
|
|
"""Returns the JSON string of the results to a query (``application/json``)"""
|
|
data = {
|
|
'query': sq.query,
|
|
'number_of_results': rc.number_of_results,
|
|
'results': [_.as_dict() for _ in rc.get_ordered_results()],
|
|
'answers': [_.as_dict() for _ in rc.answers],
|
|
'corrections': list(rc.corrections),
|
|
'infoboxes': rc.infoboxes,
|
|
'suggestions': list(rc.suggestions),
|
|
'unresponsive_engines': get_translated_errors(rc.unresponsive_engines),
|
|
}
|
|
response = json.dumps(data, cls=JSONEncoder)
|
|
return response
|
|
|
|
|
|
def get_themes(templates_path):
|
|
"""Returns available themes list."""
|
|
return os.listdir(templates_path)
|
|
|
|
|
|
def get_static_file_list() -> list[str]:
|
|
file_list = []
|
|
static_path = pathlib.Path(str(get_setting("ui.static_path")))
|
|
|
|
def _walk(path: pathlib.Path):
|
|
for f in path.iterdir():
|
|
if f.name.startswith('.'):
|
|
# ignore hidden file
|
|
continue
|
|
if f.is_file():
|
|
file_list.append(str(f.relative_to(static_path)))
|
|
if f.is_dir():
|
|
_walk(f)
|
|
|
|
_walk(static_path)
|
|
return file_list
|
|
|
|
|
|
def get_result_templates(templates_path):
|
|
result_templates = set()
|
|
templates_path_length = len(templates_path) + 1
|
|
for directory, _, files in os.walk(templates_path):
|
|
if directory.endswith('result_templates'):
|
|
for filename in files:
|
|
f = os.path.join(directory[templates_path_length:], filename)
|
|
result_templates.add(f)
|
|
return result_templates
|
|
|
|
|
|
def new_hmac(secret_key, url):
|
|
return hmac.new(secret_key.encode(), url, hashlib.sha256).hexdigest()
|
|
|
|
|
|
def is_hmac_of(secret_key, value, hmac_to_check):
|
|
hmac_of_value = new_hmac(secret_key, value)
|
|
return len(hmac_of_value) == len(hmac_to_check) and hmac.compare_digest(hmac_of_value, hmac_to_check)
|
|
|
|
|
|
def prettify_url(url, max_length=74):
|
|
if len(url) > max_length:
|
|
chunk_len = int(max_length / 2 + 1)
|
|
return '{0}[...]{1}'.format(url[:chunk_len], url[-chunk_len:])
|
|
return url
|
|
|
|
|
|
def contains_cjko(s: str) -> bool:
|
|
"""This function check whether or not a string contains Chinese, Japanese,
|
|
or Korean characters. It employs regex and uses the u escape sequence to
|
|
match any character in a set of Unicode ranges.
|
|
|
|
Args:
|
|
s (str): string to be checked.
|
|
|
|
Returns:
|
|
bool: True if the input s contains the characters and False otherwise.
|
|
"""
|
|
unicode_ranges = (
|
|
'\u4e00-\u9fff' # Chinese characters
|
|
'\u3040-\u309f' # Japanese hiragana
|
|
'\u30a0-\u30ff' # Japanese katakana
|
|
'\u4e00-\u9faf' # Japanese kanji
|
|
'\uac00-\ud7af' # Korean hangul syllables
|
|
'\u1100-\u11ff' # Korean hangul jamo
|
|
)
|
|
return bool(re.search(fr'[{unicode_ranges}]', s))
|
|
|
|
|
|
def regex_highlight_cjk(word: str) -> str:
|
|
"""Generate the regex pattern to match for a given word according
|
|
to whether or not the word contains CJK characters or not.
|
|
If the word is and/or contains CJK character, the regex pattern
|
|
will match standalone word by taking into account the presence
|
|
of whitespace before and after it; if not, it will match any presence
|
|
of the word throughout the text, ignoring the whitespace.
|
|
|
|
Args:
|
|
word (str): the word to be matched with regex pattern.
|
|
|
|
Returns:
|
|
str: the regex pattern for the word.
|
|
"""
|
|
rword = re.escape(word)
|
|
if contains_cjko(rword):
|
|
return fr'({rword})'
|
|
return fr'\b({rword})(?!\w)'
|
|
|
|
|
|
def highlight_content(content, query):
|
|
|
|
if not content:
|
|
return None
|
|
|
|
# ignoring html contents
|
|
if content.find('<') != -1:
|
|
return content
|
|
|
|
querysplit = query.split()
|
|
queries = []
|
|
for qs in querysplit:
|
|
qs = qs.replace("'", "").replace('"', '').replace(" ", "")
|
|
if len(qs) > 0:
|
|
queries.extend(re.findall(regex_highlight_cjk(qs), content, flags=re.I | re.U))
|
|
if len(queries) > 0:
|
|
regex = re.compile("|".join(map(regex_highlight_cjk, queries)))
|
|
return regex.sub(lambda match: f'<span class="highlight">{match.group(0)}</span>'.replace('\\', r'\\'), content)
|
|
return content
|
|
|
|
|
|
def searxng_l10n_timespan(dt: datetime) -> str: # pylint: disable=invalid-name
|
|
"""Returns a human-readable and translated string indicating how long ago
|
|
a date was in the past / the time span of the date to the present.
|
|
|
|
On January 1st, midnight, the returned string only indicates how many years
|
|
ago the date was.
|
|
"""
|
|
# TODO, check if timezone is calculated right # pylint: disable=fixme
|
|
d = dt.date()
|
|
t = dt.time()
|
|
if d.month == 1 and d.day == 1 and t.hour == 0 and t.minute == 0 and t.second == 0:
|
|
return str(d.year)
|
|
if dt.replace(tzinfo=None) >= datetime.now() - timedelta(days=1):
|
|
timedifference = datetime.now() - dt.replace(tzinfo=None)
|
|
minutes = int((timedifference.seconds / 60) % 60)
|
|
hours = int(timedifference.seconds / 60 / 60)
|
|
if hours == 0:
|
|
return gettext('{minutes} minute(s) ago').format(minutes=minutes)
|
|
return gettext('{hours} hour(s), {minutes} minute(s) ago').format(hours=hours, minutes=minutes)
|
|
return format_date(dt)
|
|
|
|
|
|
NO_SUBGROUPING = 'without further subgrouping'
|
|
|
|
|
|
def group_engines_in_tab(engines: "Iterable[Engine]") -> List[Tuple[str, "Iterable[Engine]"]]:
|
|
"""Groups an Iterable of engines by their first non tab category (first subgroup)"""
|
|
|
|
def get_subgroup(eng):
|
|
non_tab_categories = [c for c in eng.categories if c not in tabs + [DEFAULT_CATEGORY]]
|
|
return non_tab_categories[0] if len(non_tab_categories) > 0 else NO_SUBGROUPING
|
|
|
|
def group_sort_key(group):
|
|
return (group[0] == NO_SUBGROUPING, group[0].lower())
|
|
|
|
def engine_sort_key(engine):
|
|
return (engine.about.get('language', ''), engine.name)
|
|
|
|
tabs = list(get_setting('categories_as_tabs').keys())
|
|
subgroups = itertools.groupby(sorted(engines, key=get_subgroup), get_subgroup)
|
|
sorted_groups = sorted(((name, list(engines)) for name, engines in subgroups), key=group_sort_key)
|
|
|
|
ret_val = []
|
|
for groupname, _engines in sorted_groups:
|
|
group_bang = '!' + groupname.replace(' ', '_') if groupname != NO_SUBGROUPING else ''
|
|
ret_val.append((groupname, group_bang, sorted(_engines, key=engine_sort_key)))
|
|
|
|
return ret_val
|