mirror of
https://github.com/searxng/searxng.git
synced 2024-11-25 12:21:00 +00:00
101 lines
2.2 KiB
Python
101 lines
2.2 KiB
Python
# SPDX-License-Identifier: AGPL-3.0-or-later
|
|
"""PostgreSQL is a powerful and robust open source database. Before configuring
|
|
the PostgreSQL engine, you must install the dependency ``psychopg2``.
|
|
|
|
Example
|
|
=======
|
|
|
|
Below is an example configuration:
|
|
|
|
.. code:: yaml
|
|
|
|
- name: my_database
|
|
engine: postgresql
|
|
database: my_database
|
|
username: searxng
|
|
password: password
|
|
query_str: 'SELECT * from my_table WHERE my_column = %(query)s'
|
|
|
|
Implementations
|
|
===============
|
|
|
|
"""
|
|
|
|
try:
|
|
import psycopg2 # type: ignore
|
|
except ImportError:
|
|
# import error is ignored because the admin has to install postgresql
|
|
# manually to use the engine.
|
|
pass
|
|
|
|
engine_type = 'offline'
|
|
|
|
host = "127.0.0.1"
|
|
"""Hostname of the DB connector"""
|
|
|
|
port = "5432"
|
|
"""Port of the DB connector"""
|
|
|
|
database = ""
|
|
"""Name of the database."""
|
|
|
|
username = ""
|
|
"""Username for the DB connection."""
|
|
|
|
password = ""
|
|
"""Password for the DB connection."""
|
|
|
|
query_str = ""
|
|
"""SQL query that returns the result items."""
|
|
|
|
limit = 10
|
|
paging = True
|
|
result_template = 'key-value.html'
|
|
_connection = None
|
|
|
|
|
|
def init(engine_settings):
|
|
global _connection # pylint: disable=global-statement
|
|
|
|
if 'query_str' not in engine_settings:
|
|
raise ValueError('query_str cannot be empty')
|
|
|
|
if not engine_settings['query_str'].lower().startswith('select '):
|
|
raise ValueError('only SELECT query is supported')
|
|
|
|
_connection = psycopg2.connect(
|
|
database=database,
|
|
user=username,
|
|
password=password,
|
|
host=host,
|
|
port=port,
|
|
)
|
|
|
|
|
|
def search(query, params):
|
|
query_params = {'query': query}
|
|
query_to_run = query_str + ' LIMIT {0} OFFSET {1}'.format(limit, (params['pageno'] - 1) * limit)
|
|
|
|
with _connection:
|
|
with _connection.cursor() as cur:
|
|
cur.execute(query_to_run, query_params)
|
|
return _fetch_results(cur)
|
|
|
|
|
|
def _fetch_results(cur):
|
|
results = []
|
|
titles = []
|
|
|
|
try:
|
|
titles = [column_desc.name for column_desc in cur.description]
|
|
|
|
for res in cur:
|
|
result = dict(zip(titles, map(str, res)))
|
|
result['template'] = result_template
|
|
results.append(result)
|
|
|
|
# no results to fetch
|
|
except psycopg2.ProgrammingError:
|
|
pass
|
|
|
|
return results
|