mirror of
https://github.com/searxng/searxng.git
synced 2024-08-25 15:30:20 +02:00
This patch was generated by black [1]:: make format.python [1] https://github.com/psf/black Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
173 lines
5.2 KiB
Python
173 lines
5.2 KiB
Python
# SPDX-License-Identifier: AGPL-3.0-or-later
|
|
"""
|
|
Command (offline)
|
|
"""
|
|
|
|
import re
|
|
from os.path import expanduser, isabs, realpath, commonprefix
|
|
from shlex import split as shlex_split
|
|
from subprocess import Popen, PIPE
|
|
from threading import Thread
|
|
|
|
from searx import logger
|
|
|
|
|
|
engine_type = 'offline'
|
|
paging = True
|
|
command = []
|
|
delimiter = {}
|
|
parse_regex = {}
|
|
query_type = ''
|
|
query_enum = []
|
|
environment_variables = {}
|
|
working_dir = realpath('.')
|
|
result_separator = '\n'
|
|
result_template = 'key-value.html'
|
|
timeout = 4.0
|
|
|
|
_command_logger = logger.getChild('command')
|
|
_compiled_parse_regex = {}
|
|
|
|
|
|
def init(engine_settings):
|
|
check_parsing_options(engine_settings)
|
|
|
|
if 'command' not in engine_settings:
|
|
raise ValueError('engine command : missing configuration key: command')
|
|
|
|
global command, working_dir, delimiter, parse_regex, environment_variables
|
|
|
|
command = engine_settings['command']
|
|
|
|
if 'working_dir' in engine_settings:
|
|
working_dir = engine_settings['working_dir']
|
|
if not isabs(engine_settings['working_dir']):
|
|
working_dir = realpath(working_dir)
|
|
|
|
if 'parse_regex' in engine_settings:
|
|
parse_regex = engine_settings['parse_regex']
|
|
for result_key, regex in parse_regex.items():
|
|
_compiled_parse_regex[result_key] = re.compile(regex, flags=re.MULTILINE)
|
|
if 'delimiter' in engine_settings:
|
|
delimiter = engine_settings['delimiter']
|
|
|
|
if 'environment_variables' in engine_settings:
|
|
environment_variables = engine_settings['environment_variables']
|
|
|
|
|
|
def search(query, params):
|
|
cmd = _get_command_to_run(query)
|
|
if not cmd:
|
|
return []
|
|
|
|
results = []
|
|
reader_thread = Thread(target=_get_results_from_process, args=(results, cmd, params['pageno']))
|
|
reader_thread.start()
|
|
reader_thread.join(timeout=timeout)
|
|
|
|
return results
|
|
|
|
|
|
def _get_command_to_run(query):
|
|
params = shlex_split(query)
|
|
__check_query_params(params)
|
|
|
|
cmd = []
|
|
for c in command:
|
|
if c == '{{QUERY}}':
|
|
cmd.extend(params)
|
|
else:
|
|
cmd.append(c)
|
|
|
|
return cmd
|
|
|
|
|
|
def _get_results_from_process(results, cmd, pageno):
|
|
leftover = ''
|
|
count = 0
|
|
start, end = __get_results_limits(pageno)
|
|
with Popen(cmd, stdout=PIPE, stderr=PIPE, env=environment_variables) as process:
|
|
line = process.stdout.readline()
|
|
while line:
|
|
buf = leftover + line.decode('utf-8')
|
|
raw_results = buf.split(result_separator)
|
|
if raw_results[-1]:
|
|
leftover = raw_results[-1]
|
|
raw_results = raw_results[:-1]
|
|
|
|
for raw_result in raw_results:
|
|
result = __parse_single_result(raw_result)
|
|
if result is None:
|
|
_command_logger.debug('skipped result:', raw_result)
|
|
continue
|
|
|
|
if start <= count and count <= end:
|
|
result['template'] = result_template
|
|
results.append(result)
|
|
|
|
count += 1
|
|
if end < count:
|
|
return results
|
|
|
|
line = process.stdout.readline()
|
|
|
|
return_code = process.wait(timeout=timeout)
|
|
if return_code != 0:
|
|
raise RuntimeError('non-zero return code when running command', cmd, return_code)
|
|
|
|
|
|
def __get_results_limits(pageno):
|
|
start = (pageno - 1) * 10
|
|
end = start + 9
|
|
return start, end
|
|
|
|
|
|
def __check_query_params(params):
|
|
if not query_type:
|
|
return
|
|
|
|
if query_type == 'path':
|
|
query_path = params[-1]
|
|
query_path = expanduser(query_path)
|
|
if commonprefix([realpath(query_path), working_dir]) != working_dir:
|
|
raise ValueError('requested path is outside of configured working directory')
|
|
elif query_type == 'enum' and len(query_enum) > 0:
|
|
for param in params:
|
|
if param not in query_enum:
|
|
raise ValueError('submitted query params is not allowed', param, 'allowed params:', query_enum)
|
|
|
|
|
|
def check_parsing_options(engine_settings):
|
|
"""Checks if delimiter based parsing or regex parsing is configured correctly"""
|
|
|
|
if 'delimiter' not in engine_settings and 'parse_regex' not in engine_settings:
|
|
raise ValueError('failed to init settings for parsing lines: missing delimiter or parse_regex')
|
|
if 'delimiter' in engine_settings and 'parse_regex' in engine_settings:
|
|
raise ValueError('failed to init settings for parsing lines: too many settings')
|
|
|
|
if 'delimiter' in engine_settings:
|
|
if 'chars' not in engine_settings['delimiter'] or 'keys' not in engine_settings['delimiter']:
|
|
raise ValueError
|
|
|
|
|
|
def __parse_single_result(raw_result):
|
|
"""Parses command line output based on configuration"""
|
|
|
|
result = {}
|
|
|
|
if delimiter:
|
|
elements = raw_result.split(delimiter['chars'], maxsplit=len(delimiter['keys']) - 1)
|
|
if len(elements) != len(delimiter['keys']):
|
|
return {}
|
|
for i in range(len(elements)):
|
|
result[delimiter['keys'][i]] = elements[i]
|
|
|
|
if parse_regex:
|
|
for result_key, regex in _compiled_parse_regex.items():
|
|
found = regex.search(raw_result)
|
|
if not found:
|
|
return {}
|
|
result[result_key] = raw_result[found.start() : found.end()]
|
|
|
|
return result
|