1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
|
"""Handle connection to auth database."""
import sqlite3
import logging
import contextlib
from typing import Any, Callable, Iterator, Protocol
import traceback
class DbConnection(Protocol):
"""Type annotation for a generic database connection object."""
def cursor(self) -> Any:
"""A cursor object"""
...
def commit(self) -> Any:
"""Commit the transaction."""
...
def rollback(self) -> Any:
"""Rollback the transaction."""
...
class DbCursor(Protocol):
"""Type annotation for a generic database cursor object."""
def execute(self, *args, **kwargs) -> Any:
"""Execute a single query"""
...
def executemany(self, *args, **kwargs) -> Any:
"""
Execute parameterized SQL statement sql against all parameter sequences
or mappings found in the sequence parameters.
"""
...
def fetchone(self, *args, **kwargs):
"""Fetch single result if present, or `None`."""
...
def fetchmany(self, *args, **kwargs):
"""Fetch many results if present or `None`."""
...
def fetchall(self, *args, **kwargs):
"""Fetch all results if present or `None`."""
...
@contextlib.contextmanager
def connection(db_path: str, row_factory: Callable = sqlite3.Row) -> Iterator[DbConnection]:
"""Create the connection to the auth database."""
logging.debug("SQLite3 DB Path: '%s'.", db_path)
conn = sqlite3.connect(db_path)
conn.row_factory = row_factory
conn.set_trace_callback(logging.debug)
conn.execute("PRAGMA foreign_keys = ON")
try:
yield conn
except sqlite3.Error as exc:
conn.rollback()
logging.debug(traceback.format_exc())
raise exc
finally:
conn.commit()
conn.close()
@contextlib.contextmanager
def cursor(conn: DbConnection) -> Iterator[DbCursor]:
"""Get a cursor from the given connection to the auth database."""
cur = conn.cursor()
try:
yield cur
except sqlite3.Error as exc:
conn.rollback()
logging.debug(traceback.format_exc())
raise exc
finally:
conn.commit()
cur.close()
|
