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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,79 @@ | ||
| import os | ||
| import sqlite3 | ||
| import datetime | ||
|
|
||
| DISK_LOCATION_DEFAULT = os.path.join(os.path.expanduser('~'), '.cache', | ||
| 'cve-bin-tool') | ||
|
|
||
| class VersionSignatureDb: | ||
| """ Methods for version signature data stored in sqlite """ | ||
| def __init__(self, table_name, mapping_function, duration): | ||
| """ Set location on disk data cache will reside. | ||
| Also sets the table name and refresh duration | ||
| """ | ||
| self.table_name = table_name | ||
| self.mapping_function = mapping_function | ||
| self.disk_location = DISK_LOCATION_DEFAULT | ||
| self.duration = duration | ||
| self.conn = None | ||
| self.cursor = None | ||
|
|
||
| @property | ||
| def dbname(self): | ||
| """ SQLite datebase file where the data is stored.""" | ||
| return os.path.join(self.disk_location, 'version_map.db') | ||
|
|
||
| def open(self): | ||
| """ Opens connection to sqlite database.""" | ||
| self.conn = sqlite3.connect(self.dbname) | ||
| self.cursor = self.conn.cursor() | ||
|
|
||
| def close(self): | ||
| """ Closes connection to sqlite database.""" | ||
| self.cursor.close() | ||
| self.conn.close() | ||
| self.conn = None | ||
| self.cursor = None | ||
|
|
||
| def __enter__(self): | ||
| """ Opens connection to sqlite database.""" | ||
| self.open() | ||
|
|
||
| def __exit__(self, exc_type, exc_val, exc_tb): | ||
| """ Closes connection to sqlite database.""" | ||
| self.close() | ||
|
|
||
| def get_mapping_data(self): | ||
| """ | ||
| Returns a version map associated with the specified checker. Also takes care of updating | ||
| the data after the specified refresh duration | ||
| """ | ||
| self.cursor.execute( | ||
| 'CREATE TABLE IF NOT EXISTS {}(version TEXT , sourceId TEXT PRIMARY KEY)'.format(self.table_name)) | ||
| # fetch first entry | ||
| entry = self.cursor.execute('SELECT * FROM {}'.format(self.table_name)).fetchone() | ||
| update_required = False | ||
| if entry is not None: | ||
| # Check if update is required | ||
| # Updates if the difference between current time and the time of latest release is greater than duration | ||
| cur_time = datetime.datetime.now().replace(microsecond=0) | ||
| time_fields = entry[1].split() | ||
| year_data = time_fields[0].split('-') | ||
| time_data = time_fields[1].split(':') | ||
| yy, mm, dd = int(year_data[0]), int(year_data[1]), int(year_data[2]) | ||
| H, M, S = int(time_data[0]), int(time_data[1]), int(time_data[2]) | ||
| last_release = datetime.datetime(yy, mm, dd, H, M, S) | ||
| time_elapsed = str(cur_time - last_release) | ||
| if int(time_elapsed.split()[0]) >= self.duration: | ||
| update_required = True | ||
|
|
||
| if entry is None or update_required: | ||
| # if update is required or database is empty, fetch and insert data into database | ||
| self.cursor.execute('DELETE FROM {}'.format(self.table_name)) | ||
| for mapping in self.mapping_function(): | ||
| self.cursor.execute('INSERT INTO {} (version, sourceId) VALUES (?, ?)'.format(self.table_name), | ||
| (mapping[0], mapping[1])) | ||
|
|
||
| data = self.cursor.execute('SELECT * FROM {}'.format(self.table_name)).fetchall() | ||
| self.conn.commit() | ||
| return data |
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