searxng/searx/engines/postgresql.py

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# SPDX-License-Identifier: AGPL-3.0-or-later
# lint: pylint
"""PostgreSQL database (offline)
"""
# import error is ignored because the admin has to install mysql manually to use
# the engine
[fix] pyright repported errors The errors make pyright usage useless since a new error won't be seen [1]. [1] https://github.com/searxng/searxng/pull/1569 ``` searx/compat.py:11:27 - error: Expression of type "Type[cached_property[_T@cached_property]]" cannot be assigned to declared type "Type[cached_property]" "Type[cached_property[_T@cached_property]]" is incompatible with "Type[cached_property]" Type "Type[cached_property[_T@cached_property]]" cannot be assigned to type "Type[cached_property]" (reportGeneralTypeIssues) searx/utils.py:69:36 - error: Expression of type "None" cannot be assigned to parameter of type "str" Type "None" cannot be assigned to type "str" (reportGeneralTypeIssues) searx/utils.py:573:85 - error: Expression of type "None" cannot be assigned to parameter of type "int" Type "None" cannot be assigned to type "int" (reportGeneralTypeIssues) searx/webapp.py:1306:22 - error: Argument of type "str" cannot be assigned to parameter "__a" of type "BytesPath" in function "join" Type "str" cannot be assigned to type "BytesPath" "str" is incompatible with "bytes" "str" is incompatible with protocol "PathLike[bytes]" "__fspath__" is not present (reportGeneralTypeIssues) searx/webapp.py:1306:68 - error: Argument of type "Literal['themes']" cannot be assigned to parameter "paths" of type "BytesPath" in function "join" Type "Literal['themes']" cannot be assigned to type "BytesPath" "Literal['themes']" is incompatible with "bytes" "Literal['themes']" is incompatible with protocol "PathLike[bytes]" "__fspath__" is not present (reportGeneralTypeIssues) searx/webapp.py:1306:78 - error: Argument of type "str | Any | None" cannot be assigned to parameter "paths" of type "BytesPath" in function "join" Type "str | Any | None" cannot be assigned to type "BytesPath" Type "str" cannot be assigned to type "BytesPath" "str" is incompatible with "bytes" "str" is incompatible with protocol "PathLike[bytes]" "__fspath__" is not present (reportGeneralTypeIssues) searx/webapp.py:1306:85 - error: Argument of type "Literal['img']" cannot be assigned to parameter "paths" of type "BytesPath" in function "join" Type "Literal['img']" cannot be assigned to type "BytesPath" "Literal['img']" is incompatible with "bytes" "Literal['img']" is incompatible with protocol "PathLike[bytes]" "__fspath__" is not present (reportGeneralTypeIssues) searx/engines/mongodb.py:8:6 - warning: Import "pymongo" could not be resolved (reportMissingImports) searx/engines/mysql_server.py:9:8 - warning: Import "mysql.connector" could not be resolved (reportMissingImports) searx/engines/postgresql.py:9:8 - warning: Import "psycopg2" could not be resolved from source (reportMissingModuleSource) searx/engines/xpath.py:187:28 - warning: "categories" is not defined (reportUndefinedVariable) searx/search/__init__.py:184:82 - warning: "flask" is not defined (reportUndefinedVariable) searx/search/checker/background.py:19:26 - error: Type of "schedule" is partially unknown Type of "schedule" is "(delay: Any, func: Any, *args: Any) -> Literal[True]" (reportUnknownVariableType) searx/shared/__init__.py:8:12 - warning: Import "uwsgi" could not be resolved (reportMissingImports) searx/shared/shared_uwsgi.py:5:8 - warning: Import "uwsgi" could not be resolved (reportMissingImports) ```
2022-07-28 11:02:56 +00:00
import psycopg2 # pyright: ignore # pylint: disable=import-error
engine_type = 'offline'
host = "127.0.0.1"
port = "5432"
database = ""
username = ""
password = ""
query_str = ""
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