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<article role="main" id="furo-main-content">
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<h1>Source code for searx.sqlitedb</h1><div class="highlight"><pre>
|
||
<span></span><span class="c1"># SPDX-License-Identifier: AGPL-3.0-or-later</span>
|
||
<span class="sd">"""Implementations to make access to SQLite databases a little more convenient.</span>
|
||
|
||
<span class="sd">:py:obj:`SQLiteAppl`</span>
|
||
<span class="sd"> Abstract class with which DB applications can be implemented.</span>
|
||
|
||
<span class="sd">:py:obj:`SQLiteProperties`:</span>
|
||
<span class="sd"> Class to manage properties stored in a database.</span>
|
||
|
||
<span class="sd">Examplarical implementations based on :py:obj:`SQLiteAppl`:</span>
|
||
|
||
<span class="sd">:py:obj:`searx.cache.ExpireCacheSQLite` :</span>
|
||
<span class="sd"> Cache that manages key/value pairs in a SQLite DB, in which the key/value</span>
|
||
<span class="sd"> pairs are deleted after an "expire" time. This type of cache is used, for</span>
|
||
<span class="sd"> example, for the engines, see :py:obj:`searx.enginelib.EngineCache`.</span>
|
||
|
||
<span class="sd">:py:obj:`searx.favicons.cache.FaviconCacheSQLite` :</span>
|
||
<span class="sd"> Favicon cache that manages the favicon BLOBs in a SQLite DB.</span>
|
||
|
||
<span class="sd">----</span>
|
||
<span class="sd">"""</span>
|
||
|
||
<span class="kn">import</span><span class="w"> </span><span class="nn">typing</span><span class="w"> </span><span class="k">as</span><span class="w"> </span><span class="nn">t</span>
|
||
<span class="kn">import</span><span class="w"> </span><span class="nn">abc</span>
|
||
<span class="kn">import</span><span class="w"> </span><span class="nn">datetime</span>
|
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<span class="kn">import</span><span class="w"> </span><span class="nn">re</span>
|
||
<span class="kn">import</span><span class="w"> </span><span class="nn">sqlite3</span>
|
||
<span class="kn">import</span><span class="w"> </span><span class="nn">sys</span>
|
||
<span class="kn">import</span><span class="w"> </span><span class="nn">threading</span>
|
||
<span class="kn">import</span><span class="w"> </span><span class="nn">uuid</span>
|
||
|
||
<span class="kn">from</span><span class="w"> </span><span class="nn">searx</span><span class="w"> </span><span class="kn">import</span> <span class="n">logger</span>
|
||
|
||
<span class="n">logger</span> <span class="o">=</span> <span class="n">logger</span><span class="o">.</span><span class="n">getChild</span><span class="p">(</span><span class="s2">"sqlitedb"</span><span class="p">)</span>
|
||
|
||
<span class="n">THREAD_LOCAL</span> <span class="o">=</span> <span class="n">threading</span><span class="o">.</span><span class="n">local</span><span class="p">()</span>
|
||
|
||
|
||
<div class="viewcode-block" id="DBSession">
|
||
<a class="viewcode-back" href="../../src/searx.sqlitedb.html#searx.sqlitedb.DBSession">[docs]</a>
|
||
<span class="k">class</span><span class="w"> </span><span class="nc">DBSession</span><span class="p">:</span>
|
||
<span class="w"> </span><span class="sd">"""A *thead-local* DB session"""</span>
|
||
|
||
<div class="viewcode-block" id="DBSession.get_connect">
|
||
<a class="viewcode-back" href="../../src/searx.sqlitedb.html#searx.sqlitedb.DBSession.get_connect">[docs]</a>
|
||
<span class="nd">@classmethod</span>
|
||
<span class="k">def</span><span class="w"> </span><span class="nf">get_connect</span><span class="p">(</span><span class="bp">cls</span><span class="p">,</span> <span class="n">app</span><span class="p">:</span> <span class="s2">"SQLiteAppl"</span><span class="p">)</span> <span class="o">-></span> <span class="n">sqlite3</span><span class="o">.</span><span class="n">Connection</span><span class="p">:</span>
|
||
<span class="w"> </span><span class="sd">"""Returns a thread local DB connection. The connection is only</span>
|
||
<span class="sd"> established once per thread.</span>
|
||
<span class="sd"> """</span>
|
||
<span class="k">if</span> <span class="nb">getattr</span><span class="p">(</span><span class="n">THREAD_LOCAL</span><span class="p">,</span> <span class="s2">"DBSession_map"</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
|
||
<span class="n">url_to_session</span><span class="p">:</span> <span class="nb">dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n">DBSession</span><span class="p">]</span> <span class="o">=</span> <span class="p">{}</span>
|
||
<span class="n">THREAD_LOCAL</span><span class="o">.</span><span class="n">DBSession_map</span> <span class="o">=</span> <span class="n">url_to_session</span>
|
||
|
||
<span class="n">session</span><span class="p">:</span> <span class="n">DBSession</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="n">THREAD_LOCAL</span><span class="o">.</span><span class="n">DBSession_map</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">app</span><span class="o">.</span><span class="n">db_url</span><span class="p">)</span>
|
||
<span class="k">if</span> <span class="n">session</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
|
||
<span class="n">session</span> <span class="o">=</span> <span class="bp">cls</span><span class="p">(</span><span class="n">app</span><span class="p">)</span>
|
||
<span class="k">return</span> <span class="n">session</span><span class="o">.</span><span class="n">conn</span></div>
|
||
|
||
|
||
<span class="k">def</span><span class="w"> </span><span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">app</span><span class="p">:</span> <span class="s2">"SQLiteAppl"</span><span class="p">):</span>
|
||
<span class="bp">self</span><span class="o">.</span><span class="n">uuid</span><span class="p">:</span> <span class="n">uuid</span><span class="o">.</span><span class="n">UUID</span> <span class="o">=</span> <span class="n">uuid</span><span class="o">.</span><span class="n">uuid4</span><span class="p">()</span>
|
||
<span class="bp">self</span><span class="o">.</span><span class="n">app</span><span class="p">:</span> <span class="n">SQLiteAppl</span> <span class="o">=</span> <span class="n">app</span>
|
||
<span class="bp">self</span><span class="o">.</span><span class="n">_conn</span><span class="p">:</span> <span class="n">sqlite3</span><span class="o">.</span><span class="n">Connection</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span>
|
||
<span class="c1"># self.__del__ will be called, when thread ends</span>
|
||
<span class="k">if</span> <span class="nb">getattr</span><span class="p">(</span><span class="n">THREAD_LOCAL</span><span class="p">,</span> <span class="s2">"DBSession_map"</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
|
||
<span class="n">url_to_session</span><span class="p">:</span> <span class="nb">dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n">DBSession</span><span class="p">]</span> <span class="o">=</span> <span class="p">{}</span>
|
||
<span class="n">THREAD_LOCAL</span><span class="o">.</span><span class="n">DBSession_map</span> <span class="o">=</span> <span class="n">url_to_session</span>
|
||
<span class="n">THREAD_LOCAL</span><span class="o">.</span><span class="n">DBSession_map</span><span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">app</span><span class="o">.</span><span class="n">db_url</span><span class="p">]</span> <span class="o">=</span> <span class="bp">self</span>
|
||
|
||
<span class="nd">@property</span>
|
||
<span class="k">def</span><span class="w"> </span><span class="nf">conn</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="n">sqlite3</span><span class="o">.</span><span class="n">Connection</span><span class="p">:</span>
|
||
<span class="n">msg</span> <span class="o">=</span> <span class="sa">f</span><span class="s2">"[</span><span class="si">{</span><span class="n">threading</span><span class="o">.</span><span class="n">current_thread</span><span class="p">()</span><span class="o">.</span><span class="n">ident</span><span class="si">}</span><span class="s2">] DBSession: "</span> <span class="sa">f</span><span class="s2">"</span><span class="si">{</span><span class="bp">self</span><span class="o">.</span><span class="n">app</span><span class="o">.</span><span class="vm">__class__</span><span class="o">.</span><span class="vm">__name__</span><span class="si">}</span><span class="s2">(</span><span class="si">{</span><span class="bp">self</span><span class="o">.</span><span class="n">app</span><span class="o">.</span><span class="n">db_url</span><span class="si">}</span><span class="s2">)"</span>
|
||
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_conn</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
|
||
<span class="bp">self</span><span class="o">.</span><span class="n">_conn</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">app</span><span class="o">.</span><span class="n">connect</span><span class="p">()</span>
|
||
<span class="n">logger</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span><span class="s2">"</span><span class="si">%s</span><span class="s2"> --> created new connection"</span><span class="p">,</span> <span class="n">msg</span><span class="p">)</span>
|
||
<span class="c1"># else:</span>
|
||
<span class="c1"># logger.debug("%s --> already connected", msg)</span>
|
||
|
||
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_conn</span>
|
||
|
||
<span class="k">def</span><span class="w"> </span><span class="fm">__del__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
|
||
<span class="k">try</span><span class="p">:</span>
|
||
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_conn</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
|
||
<span class="c1"># HINT: Don't use Python's logging facility in a destructor, it</span>
|
||
<span class="c1"># will produce error reports when python aborts the process or</span>
|
||
<span class="c1"># thread, because at this point objects that the logging module</span>
|
||
<span class="c1"># needs, do not exist anymore.</span>
|
||
<span class="c1"># msg = f"DBSession: close [{self.uuid}] {self.app.__class__.__name__}({self.app.db_url})"</span>
|
||
<span class="c1"># logger.debug(msg)</span>
|
||
<span class="bp">self</span><span class="o">.</span><span class="n">_conn</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
|
||
<span class="k">except</span> <span class="ne">Exception</span><span class="p">:</span> <span class="c1"># pylint: disable=broad-exception-caught</span>
|
||
<span class="k">pass</span></div>
|
||
|
||
|
||
|
||
<div class="viewcode-block" id="SQLiteAppl">
|
||
<a class="viewcode-back" href="../../src/searx.sqlitedb.html#searx.sqlitedb.SQLiteAppl">[docs]</a>
|
||
<span class="k">class</span><span class="w"> </span><span class="nc">SQLiteAppl</span><span class="p">(</span><span class="n">abc</span><span class="o">.</span><span class="n">ABC</span><span class="p">):</span>
|
||
<span class="w"> </span><span class="sd">"""Abstract base class for implementing convenient DB access in SQLite</span>
|
||
<span class="sd"> applications. In the constructor, a :py:obj:`SQLiteProperties` instance is</span>
|
||
<span class="sd"> already aggregated under ``self.properties``."""</span>
|
||
|
||
<span class="n">DDL_CREATE_TABLES</span><span class="p">:</span> <span class="nb">dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="p">{}</span>
|
||
|
||
<span class="n">DB_SCHEMA</span><span class="p">:</span> <span class="nb">int</span> <span class="o">=</span> <span class="mi">1</span>
|
||
<span class="w"> </span><span class="sd">"""As soon as changes are made to the DB schema, the version number must be</span>
|
||
<span class="sd"> increased. Changes to the version number require the DB to be recreated (or</span>
|
||
<span class="sd"> migrated / if an migration path exists and is implemented)."""</span>
|
||
|
||
<span class="n">SQLITE_THREADING_MODE</span><span class="p">:</span> <span class="nb">str</span> <span class="o">=</span> <span class="p">{</span>
|
||
<span class="mi">0</span><span class="p">:</span> <span class="s2">"single-thread"</span><span class="p">,</span>
|
||
<span class="mi">1</span><span class="p">:</span> <span class="s2">"multi-thread"</span><span class="p">,</span>
|
||
<span class="mi">3</span><span class="p">:</span> <span class="s2">"serialized"</span><span class="p">}[</span><span class="n">sqlite3</span><span class="o">.</span><span class="n">threadsafety</span><span class="p">]</span> <span class="c1"># fmt:skip</span>
|
||
<span class="w"> </span><span class="sd">"""Threading mode of the SQLite library. Depends on the options used at</span>
|
||
<span class="sd"> compile time and is different for different distributions and architectures.</span>
|
||
|
||
<span class="sd"> Possible values are 0:``single-thread``, 1:``multi-thread``,</span>
|
||
<span class="sd"> 3:``serialized`` (see :py:obj:`sqlite3.threadsafety`). Pre- Python 3.11</span>
|
||
<span class="sd"> this value was hard coded to 1.</span>
|
||
|
||
<span class="sd"> Depending on this value, optimizations are made, e.g. in “serialized” mode</span>
|
||
<span class="sd"> it is not necessary to create a separate DB connector for each thread.</span>
|
||
<span class="sd"> """</span>
|
||
|
||
<span class="n">SQLITE_JOURNAL_MODE</span><span class="p">:</span> <span class="nb">str</span> <span class="o">=</span> <span class="s2">"WAL"</span>
|
||
<span class="w"> </span><span class="sd">"""``SQLiteAppl`` applications are optimized for WAL_ mode, its not recommend</span>
|
||
<span class="sd"> to change the journal mode (see :py:obj:`SQLiteAppl.tear_down`).</span>
|
||
|
||
<span class="sd"> .. _WAL: https://sqlite.org/wal.html</span>
|
||
<span class="sd"> """</span>
|
||
<span class="n">SQLITE_CONNECT_ARGS</span><span class="p">:</span> <span class="nb">dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span><span class="nb">str</span><span class="o">|</span><span class="nb">int</span><span class="o">|</span><span class="nb">bool</span><span class="o">|</span><span class="kc">None</span><span class="p">]</span> <span class="o">=</span> <span class="p">{</span>
|
||
<span class="c1"># "timeout": 5.0,</span>
|
||
<span class="c1"># "detect_types": 0,</span>
|
||
<span class="s2">"check_same_thread"</span><span class="p">:</span> <span class="nb">bool</span><span class="p">(</span><span class="n">SQLITE_THREADING_MODE</span> <span class="o">!=</span> <span class="s2">"serialized"</span><span class="p">),</span>
|
||
<span class="s2">"cached_statements"</span><span class="p">:</span> <span class="mi">0</span><span class="p">,</span> <span class="c1"># https://github.com/python/cpython/issues/118172</span>
|
||
<span class="c1"># "uri": False,</span>
|
||
<span class="c1"># "isolation_level": "",</span>
|
||
<span class="c1"># "autocommit": sqlite3.LEGACY_TRANSACTION_CONTROL,</span>
|
||
<span class="p">}</span> <span class="c1"># fmt:skip</span>
|
||
<span class="w"> </span><span class="sd">"""Connection arguments (:py:obj:`sqlite3.connect`)</span>
|
||
|
||
<span class="sd"> ``check_same_thread``: *bool*</span>
|
||
<span class="sd"> Is disabled by default when :py:obj:`SQLITE_THREADING_MODE` is</span>
|
||
<span class="sd"> `serialized`. The check is more of a hindrance when threadsafety_ is</span>
|
||
<span class="sd"> `serialized` because it would prevent a DB connector from being used in</span>
|
||
<span class="sd"> multiple threads.</span>
|
||
|
||
<span class="sd"> Is enabled when threadsafety_ is ``single-thread`` or ``multi-thread``</span>
|
||
<span class="sd"> (when threads cannot share a connection PEP-0249_).</span>
|
||
|
||
<span class="sd"> ``cached_statements``:</span>
|
||
<span class="sd"> Is set to ``0`` by default. Note: Python 3.12+ fetch result are not</span>
|
||
<span class="sd"> consistent in multi-threading application and causing an API misuse error.</span>
|
||
|
||
<span class="sd"> The multithreading use in SQLiteAppl is intended and supported if</span>
|
||
<span class="sd"> threadsafety is set to 3 (aka "serialized"). CPython supports “serialized”</span>
|
||
<span class="sd"> from version 3.12 on, but unfortunately only with errors:</span>
|
||
|
||
<span class="sd"> - https://github.com/python/cpython/issues/118172</span>
|
||
<span class="sd"> - https://github.com/python/cpython/issues/123873</span>
|
||
|
||
<span class="sd"> The workaround for SQLite3 multithreading cache inconsistency is to set</span>
|
||
<span class="sd"> option ``cached_statements`` to ``0`` by default.</span>
|
||
|
||
<span class="sd"> ``isolation_level``: *unset*</span>
|
||
<span class="sd"> If the connection attribute isolation_level_ is **not** ``None``, new</span>
|
||
<span class="sd"> transactions are implicitly opened before ``execute()`` and</span>
|
||
<span class="sd"> ``executemany()`` executes SQL- INSERT, UPDATE, DELETE, or REPLACE</span>
|
||
<span class="sd"> statements `[1]`_.</span>
|
||
|
||
<span class="sd"> By default, the value is not set, which means the default from Python is</span>
|
||
<span class="sd"> used: Python's default is ``""``, which is an alias for ``"DEFERRED"``.</span>
|
||
|
||
<span class="sd"> ``autocommit``: *unset*</span>
|
||
<span class="sd"> Starting with Python 3.12 the DB connection has a ``autocommit`` attribute</span>
|
||
<span class="sd"> and the recommended way of controlling transaction behaviour is through</span>
|
||
<span class="sd"> this attribute `[2]`_.</span>
|
||
|
||
<span class="sd"> By default, the value is not set, which means the default from Python is</span>
|
||
<span class="sd"> used: Python's default is the constant LEGACY_TRANSACTION_CONTROL_:</span>
|
||
<span class="sd"> Pre-Python 3.12 (non-PEP 249-compliant) transaction control, see</span>
|
||
<span class="sd"> ``isolation_level`` above for more details.</span>
|
||
|
||
<span class="sd"> .. _PEP-0249:</span>
|
||
<span class="sd"> https://peps.python.org/pep-0249/#threadsafety</span>
|
||
<span class="sd"> .. _threadsafety:</span>
|
||
<span class="sd"> https://docs.python.org/3/library/sqlite3.html#sqlite3.threadsafety</span>
|
||
<span class="sd"> .. _isolation_level:</span>
|
||
<span class="sd"> https://docs.python.org/3/library/sqlite3.html#sqlite3.Connection.isolation_level</span>
|
||
<span class="sd"> .. _[1]:</span>
|
||
<span class="sd"> https://docs.python.org/3/library/sqlite3.html#sqlite3-transaction-control-isolation-level</span>
|
||
<span class="sd"> .. _autocommit:</span>
|
||
<span class="sd"> https://docs.python.org/3/library/sqlite3.html#sqlite3.Connection.autocommit</span>
|
||
<span class="sd"> .. _[2]:</span>
|
||
<span class="sd"> https://docs.python.org/3/library/sqlite3.html#transaction-control-via-the-autocommit-attribute</span>
|
||
<span class="sd"> .. _LEGACY_TRANSACTION_CONTROL:</span>
|
||
<span class="sd"> https://docs.python.org/3/library/sqlite3.html#sqlite3.LEGACY_TRANSACTION_CONTROL</span>
|
||
<span class="sd"> """</span>
|
||
|
||
<span class="k">def</span><span class="w"> </span><span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">db_url</span><span class="p">:</span> <span class="nb">str</span><span class="p">):</span>
|
||
|
||
<span class="bp">self</span><span class="o">.</span><span class="n">db_url</span><span class="p">:</span> <span class="nb">str</span> <span class="o">=</span> <span class="n">db_url</span>
|
||
<span class="bp">self</span><span class="o">.</span><span class="n">properties</span><span class="p">:</span> <span class="n">SQLiteProperties</span> <span class="o">=</span> <span class="n">SQLiteProperties</span><span class="p">(</span><span class="n">db_url</span><span class="p">)</span>
|
||
<span class="bp">self</span><span class="o">.</span><span class="n">_init_done</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span>
|
||
<span class="bp">self</span><span class="o">.</span><span class="n">_compatibility</span><span class="p">()</span>
|
||
<span class="c1"># atexit.register(self.tear_down)</span>
|
||
|
||
<span class="c1"># def tear_down(self):</span>
|
||
<span class="c1"># """:ref:`Vacuuming the WALs` upon normal interpreter termination</span>
|
||
<span class="c1"># (:py:obj:`atexit.register`).</span>
|
||
|
||
<span class="c1"># .. _SQLite: Vacuuming the WALs: https://www.theunterminatedstring.com/sqlite-vacuuming/</span>
|
||
<span class="c1"># """</span>
|
||
<span class="c1"># self.DB.execute("PRAGMA wal_checkpoint(TRUNCATE)")</span>
|
||
|
||
<span class="k">def</span><span class="w"> </span><span class="nf">_compatibility</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
|
||
|
||
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">SQLITE_THREADING_MODE</span> <span class="o">==</span> <span class="s2">"serialized"</span><span class="p">:</span>
|
||
<span class="bp">self</span><span class="o">.</span><span class="n">_DB</span><span class="p">:</span> <span class="n">sqlite3</span><span class="o">.</span><span class="n">Connection</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span>
|
||
<span class="k">else</span><span class="p">:</span>
|
||
<span class="n">msg</span> <span class="o">=</span> <span class="p">(</span>
|
||
<span class="sa">f</span><span class="s2">"SQLite library is compiled with </span><span class="si">{</span><span class="bp">self</span><span class="o">.</span><span class="n">SQLITE_THREADING_MODE</span><span class="si">}</span><span class="s2"> mode,"</span>
|
||
<span class="s2">" read https://docs.python.org/3/library/sqlite3.html#sqlite3.threadsafety"</span>
|
||
<span class="p">)</span>
|
||
<span class="k">if</span> <span class="n">threading</span><span class="o">.</span><span class="n">active_count</span><span class="p">()</span> <span class="o">></span> <span class="mi">1</span><span class="p">:</span>
|
||
<span class="n">logger</span><span class="o">.</span><span class="n">error</span><span class="p">(</span><span class="n">msg</span><span class="p">)</span>
|
||
<span class="k">else</span><span class="p">:</span>
|
||
<span class="n">logger</span><span class="o">.</span><span class="n">warning</span><span class="p">(</span><span class="n">msg</span><span class="p">)</span>
|
||
|
||
<span class="k">if</span> <span class="n">sqlite3</span><span class="o">.</span><span class="n">sqlite_version_info</span> <span class="o"><=</span> <span class="p">(</span><span class="mi">3</span><span class="p">,</span> <span class="mi">35</span><span class="p">):</span>
|
||
<span class="c1"># See "Generalize UPSERT:" in https://sqlite.org/releaselog/3_35_0.html</span>
|
||
<span class="n">logger</span><span class="o">.</span><span class="n">critical</span><span class="p">(</span>
|
||
<span class="s2">"SQLite runtime library version </span><span class="si">%s</span><span class="s2"> is not supported (require >= 3.35)"</span><span class="p">,</span> <span class="n">sqlite3</span><span class="o">.</span><span class="n">sqlite_version</span>
|
||
<span class="p">)</span>
|
||
|
||
<span class="k">def</span><span class="w"> </span><span class="nf">_connect</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="n">sqlite3</span><span class="o">.</span><span class="n">Connection</span><span class="p">:</span>
|
||
<span class="n">conn</span> <span class="o">=</span> <span class="n">sqlite3</span><span class="o">.</span><span class="n">Connection</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">db_url</span><span class="p">,</span> <span class="o">**</span><span class="bp">self</span><span class="o">.</span><span class="n">SQLITE_CONNECT_ARGS</span><span class="p">)</span> <span class="c1"># type: ignore</span>
|
||
<span class="n">conn</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="sa">f</span><span class="s2">"PRAGMA journal_mode=</span><span class="si">{</span><span class="bp">self</span><span class="o">.</span><span class="n">SQLITE_JOURNAL_MODE</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span>
|
||
<span class="bp">self</span><span class="o">.</span><span class="n">register_functions</span><span class="p">(</span><span class="n">conn</span><span class="p">)</span>
|
||
<span class="k">return</span> <span class="n">conn</span>
|
||
|
||
<div class="viewcode-block" id="SQLiteAppl.connect">
|
||
<a class="viewcode-back" href="../../src/searx.sqlitedb.html#searx.sqlitedb.SQLiteAppl.connect">[docs]</a>
|
||
<span class="k">def</span><span class="w"> </span><span class="nf">connect</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="n">sqlite3</span><span class="o">.</span><span class="n">Connection</span><span class="p">:</span>
|
||
<span class="w"> </span><span class="sd">"""Creates a new DB connection (:py:obj:`SQLITE_CONNECT_ARGS`). If not</span>
|
||
<span class="sd"> already done, the DB schema is set up. The caller must take care of</span>
|
||
<span class="sd"> closing the resource. Alternatively, :py:obj:`SQLiteAppl.DB` can also</span>
|
||
<span class="sd"> be used (the resource behind `self.DB` is automatically closed when the</span>
|
||
<span class="sd"> process or thread is terminated).</span>
|
||
<span class="sd"> """</span>
|
||
<span class="k">if</span> <span class="n">sys</span><span class="o">.</span><span class="n">version_info</span> <span class="o"><</span> <span class="p">(</span><span class="mi">3</span><span class="p">,</span> <span class="mi">12</span><span class="p">):</span>
|
||
<span class="c1"># Prior Python 3.12 there is no "autocommit" option</span>
|
||
<span class="bp">self</span><span class="o">.</span><span class="n">SQLITE_CONNECT_ARGS</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="s2">"autocommit"</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> <span class="c1"># pyright: ignore[reportUnreachable]</span>
|
||
|
||
<span class="n">msg</span> <span class="o">=</span> <span class="p">(</span>
|
||
<span class="sa">f</span><span class="s2">"[</span><span class="si">{</span><span class="n">threading</span><span class="o">.</span><span class="n">current_thread</span><span class="p">()</span><span class="o">.</span><span class="n">ident</span><span class="si">}</span><span class="s2">] </span><span class="si">{</span><span class="bp">self</span><span class="o">.</span><span class="vm">__class__</span><span class="o">.</span><span class="vm">__name__</span><span class="si">}</span><span class="s2">(</span><span class="si">{</span><span class="bp">self</span><span class="o">.</span><span class="n">db_url</span><span class="si">}</span><span class="s2">)"</span>
|
||
<span class="sa">f</span><span class="s2">" </span><span class="si">{</span><span class="bp">self</span><span class="o">.</span><span class="n">SQLITE_CONNECT_ARGS</span><span class="si">}</span><span class="s2"> // </span><span class="si">{</span><span class="bp">self</span><span class="o">.</span><span class="n">SQLITE_JOURNAL_MODE</span><span class="si">}</span><span class="s2">"</span>
|
||
<span class="p">)</span>
|
||
<span class="n">logger</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span><span class="n">msg</span><span class="p">)</span>
|
||
|
||
<span class="k">with</span> <span class="bp">self</span><span class="o">.</span><span class="n">_connect</span><span class="p">()</span> <span class="k">as</span> <span class="n">conn</span><span class="p">:</span>
|
||
<span class="bp">self</span><span class="o">.</span><span class="n">init</span><span class="p">(</span><span class="n">conn</span><span class="p">)</span>
|
||
<span class="k">return</span> <span class="n">conn</span></div>
|
||
|
||
|
||
<div class="viewcode-block" id="SQLiteAppl.register_functions">
|
||
<a class="viewcode-back" href="../../src/searx.sqlitedb.html#searx.sqlitedb.SQLiteAppl.register_functions">[docs]</a>
|
||
<span class="k">def</span><span class="w"> </span><span class="nf">register_functions</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">conn</span><span class="p">:</span> <span class="n">sqlite3</span><span class="o">.</span><span class="n">Connection</span><span class="p">):</span>
|
||
<span class="w"> </span><span class="sd">"""Create user-defined_ SQL functions.</span>
|
||
|
||
<span class="sd"> ``REGEXP(<pattern>, <field>)`` : 0 | 1</span>
|
||
<span class="sd"> `re.search`_ returns (int) 1 for a match and 0 for none match of</span>
|
||
<span class="sd"> ``<pattern>`` in ``<field>``.</span>
|
||
|
||
<span class="sd"> .. code:: sql</span>
|
||
|
||
<span class="sd"> SELECT '12' AS field WHERE REGEXP('^[0-9][0-9]$', field)</span>
|
||
<span class="sd"> -- 12</span>
|
||
|
||
<span class="sd"> SELECT REGEXP('[0-9][0-9]', 'X12Y')</span>
|
||
<span class="sd"> -- 1</span>
|
||
<span class="sd"> SELECT REGEXP('[0-9][0-9]', 'X1Y')</span>
|
||
<span class="sd"> -- 0</span>
|
||
|
||
<span class="sd"> .. _user-defined: https://docs.python.org/3/library/sqlite3.html#sqlite3.Connection.create_function</span>
|
||
<span class="sd"> .. _deterministic: https://sqlite.org/deterministic.html</span>
|
||
<span class="sd"> .. _re.search: https://docs.python.org/3/library/re.html#re.search</span>
|
||
<span class="sd"> """</span>
|
||
|
||
<span class="n">conn</span><span class="o">.</span><span class="n">create_function</span><span class="p">(</span><span class="s2">"regexp"</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span> <span class="k">lambda</span> <span class="n">x</span><span class="p">,</span> <span class="n">y</span><span class="p">:</span> <span class="mi">1</span> <span class="k">if</span> <span class="n">re</span><span class="o">.</span><span class="n">search</span><span class="p">(</span><span class="n">x</span><span class="p">,</span> <span class="n">y</span><span class="p">)</span> <span class="k">else</span> <span class="mi">0</span><span class="p">,</span> <span class="n">deterministic</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span> <span class="c1"># type: ignore</span></div>
|
||
|
||
|
||
<span class="nd">@property</span>
|
||
<span class="k">def</span><span class="w"> </span><span class="nf">DB</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="n">sqlite3</span><span class="o">.</span><span class="n">Connection</span><span class="p">:</span>
|
||
<span class="w"> </span><span class="sd">"""Provides a DB connection. The connection is a *singleton* and</span>
|
||
<span class="sd"> therefore well suited for read access. If</span>
|
||
<span class="sd"> :py:obj:`SQLITE_THREADING_MODE` is ``serialized`` only one DB connection</span>
|
||
<span class="sd"> is created for all threads.</span>
|
||
|
||
<span class="sd"> .. note::</span>
|
||
|
||
<span class="sd"> For dedicated `transaction control`_, it is recommended to create a</span>
|
||
<span class="sd"> new connection (:py:obj:`SQLiteAppl.connect`).</span>
|
||
|
||
<span class="sd"> .. _transaction control:</span>
|
||
<span class="sd"> https://docs.python.org/3/library/sqlite3.html#sqlite3-controlling-transactions</span>
|
||
<span class="sd"> """</span>
|
||
|
||
<span class="n">conn</span><span class="p">:</span> <span class="n">sqlite3</span><span class="o">.</span><span class="n">Connection</span>
|
||
|
||
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">SQLITE_THREADING_MODE</span> <span class="o">==</span> <span class="s2">"serialized"</span><span class="p">:</span>
|
||
<span class="c1"># Theoretically it is possible to reuse the DB cursor across threads</span>
|
||
<span class="c1"># as of Python 3.12, in practice the threading of the cursor seems</span>
|
||
<span class="c1"># to me a little faulty that I prefer to establish one connection</span>
|
||
<span class="c1"># per thread.</span>
|
||
<span class="c1">#</span>
|
||
<span class="c1"># may we can activate this code one day ..</span>
|
||
<span class="c1"># if self._DB is None:</span>
|
||
<span class="c1"># self._DB = self.connect()</span>
|
||
<span class="c1"># conn = self._DB</span>
|
||
<span class="n">conn</span> <span class="o">=</span> <span class="n">DBSession</span><span class="o">.</span><span class="n">get_connect</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span>
|
||
<span class="k">else</span><span class="p">:</span>
|
||
<span class="n">conn</span> <span class="o">=</span> <span class="n">DBSession</span><span class="o">.</span><span class="n">get_connect</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span>
|
||
|
||
<span class="c1"># Since more than one instance of SQLiteAppl share the same DB</span>
|
||
<span class="c1"># connection, we need to make sure that each SQLiteAppl instance has run</span>
|
||
<span class="c1"># its init method at least once.</span>
|
||
<span class="bp">self</span><span class="o">.</span><span class="n">init</span><span class="p">(</span><span class="n">conn</span><span class="p">)</span>
|
||
|
||
<span class="k">return</span> <span class="n">conn</span>
|
||
|
||
<div class="viewcode-block" id="SQLiteAppl.init">
|
||
<a class="viewcode-back" href="../../src/searx.sqlitedb.html#searx.sqlitedb.SQLiteAppl.init">[docs]</a>
|
||
<span class="k">def</span><span class="w"> </span><span class="nf">init</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">conn</span><span class="p">:</span> <span class="n">sqlite3</span><span class="o">.</span><span class="n">Connection</span><span class="p">)</span> <span class="o">-></span> <span class="nb">bool</span><span class="p">:</span>
|
||
<span class="w"> </span><span class="sd">"""Initializes the DB schema and properties, is only executed once even</span>
|
||
<span class="sd"> if called several times.</span>
|
||
|
||
<span class="sd"> If the initialization has not yet taken place, it is carried out and a</span>
|
||
<span class="sd"> `True` is returned to the caller at the end. If the initialization has</span>
|
||
<span class="sd"> already been carried out in the past, `False` is returned.</span>
|
||
<span class="sd"> """</span>
|
||
|
||
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_init_done</span><span class="p">:</span>
|
||
<span class="k">return</span> <span class="kc">False</span>
|
||
<span class="bp">self</span><span class="o">.</span><span class="n">_init_done</span> <span class="o">=</span> <span class="kc">True</span>
|
||
|
||
<span class="n">logger</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span><span class="s2">"init DB: </span><span class="si">%s</span><span class="s2">"</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">db_url</span><span class="p">)</span>
|
||
<span class="bp">self</span><span class="o">.</span><span class="n">properties</span><span class="o">.</span><span class="n">init</span><span class="p">(</span><span class="n">conn</span><span class="p">)</span>
|
||
|
||
<span class="n">ver</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">properties</span><span class="p">(</span><span class="s2">"DB_SCHEMA"</span><span class="p">)</span>
|
||
<span class="k">if</span> <span class="n">ver</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
|
||
<span class="k">with</span> <span class="n">conn</span><span class="p">:</span>
|
||
<span class="bp">self</span><span class="o">.</span><span class="n">create_schema</span><span class="p">(</span><span class="n">conn</span><span class="p">)</span>
|
||
<span class="k">else</span><span class="p">:</span>
|
||
<span class="n">ver</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="n">ver</span><span class="p">)</span>
|
||
<span class="k">if</span> <span class="n">ver</span> <span class="o">!=</span> <span class="bp">self</span><span class="o">.</span><span class="n">DB_SCHEMA</span><span class="p">:</span>
|
||
<span class="k">raise</span> <span class="n">sqlite3</span><span class="o">.</span><span class="n">DatabaseError</span><span class="p">(</span><span class="s2">"Expected DB schema v</span><span class="si">%s</span><span class="s2">, DB schema is v</span><span class="si">%s</span><span class="s2">"</span> <span class="o">%</span> <span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">DB_SCHEMA</span><span class="p">,</span> <span class="n">ver</span><span class="p">))</span>
|
||
<span class="n">logger</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span><span class="s2">"DB_SCHEMA = </span><span class="si">%s</span><span class="s2">"</span><span class="p">,</span> <span class="n">ver</span><span class="p">)</span>
|
||
|
||
<span class="k">return</span> <span class="kc">True</span></div>
|
||
|
||
|
||
<span class="k">def</span><span class="w"> </span><span class="nf">create_schema</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">conn</span><span class="p">:</span> <span class="n">sqlite3</span><span class="o">.</span><span class="n">Connection</span><span class="p">):</span>
|
||
|
||
<span class="n">logger</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span><span class="s2">"create schema .."</span><span class="p">)</span>
|
||
<span class="bp">self</span><span class="o">.</span><span class="n">properties</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"DB_SCHEMA"</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">DB_SCHEMA</span><span class="p">)</span>
|
||
<span class="bp">self</span><span class="o">.</span><span class="n">properties</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"LAST_MAINTENANCE"</span><span class="p">,</span> <span class="s2">""</span><span class="p">)</span>
|
||
<span class="k">with</span> <span class="n">conn</span><span class="p">:</span>
|
||
<span class="k">for</span> <span class="n">table_name</span><span class="p">,</span> <span class="n">sql</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">DDL_CREATE_TABLES</span><span class="o">.</span><span class="n">items</span><span class="p">():</span>
|
||
<span class="n">conn</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="n">sql</span><span class="p">)</span>
|
||
<span class="bp">self</span><span class="o">.</span><span class="n">properties</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Table </span><span class="si">{</span><span class="n">table_name</span><span class="si">}</span><span class="s2"> created"</span><span class="p">,</span> <span class="n">table_name</span><span class="p">)</span></div>
|
||
|
||
|
||
|
||
<div class="viewcode-block" id="SQLiteProperties">
|
||
<a class="viewcode-back" href="../../src/searx.sqlitedb.html#searx.sqlitedb.SQLiteProperties">[docs]</a>
|
||
<span class="k">class</span><span class="w"> </span><span class="nc">SQLiteProperties</span><span class="p">(</span><span class="n">SQLiteAppl</span><span class="p">):</span>
|
||
<span class="w"> </span><span class="sd">"""Simple class to manage properties of a DB application in the DB. The</span>
|
||
<span class="sd"> object has its own DB connection and transaction area.</span>
|
||
|
||
<span class="sd"> .. code:: sql</span>
|
||
|
||
<span class="sd"> CREATE TABLE IF NOT EXISTS properties (</span>
|
||
<span class="sd"> name TEXT,</span>
|
||
<span class="sd"> value TEXT,</span>
|
||
<span class="sd"> m_time INTEGER DEFAULT (strftime('%s', 'now')),</span>
|
||
<span class="sd"> PRIMARY KEY (name))</span>
|
||
|
||
<span class="sd"> """</span>
|
||
|
||
<span class="n">SQLITE_JOURNAL_MODE</span><span class="p">:</span> <span class="nb">str</span> <span class="o">=</span> <span class="s2">"WAL"</span>
|
||
|
||
<span class="n">DDL_PROPERTIES</span><span class="p">:</span> <span class="nb">str</span> <span class="o">=</span> <span class="s2">"""</span><span class="se">\</span>
|
||
<span class="s2">CREATE TABLE IF NOT EXISTS properties (</span>
|
||
<span class="s2"> name TEXT,</span>
|
||
<span class="s2"> value TEXT,</span>
|
||
<span class="s2"> m_time INTEGER DEFAULT (strftime('</span><span class="si">%s</span><span class="s2">', 'now')), -- last modified (unix epoch) time in sec.</span>
|
||
<span class="s2"> PRIMARY KEY (name))"""</span>
|
||
|
||
<span class="w"> </span><span class="sd">"""Table to store properties of the DB application"""</span>
|
||
|
||
<span class="n">SQL_GET</span><span class="p">:</span> <span class="nb">str</span> <span class="o">=</span> <span class="s2">"SELECT value FROM properties WHERE name = ?"</span>
|
||
<span class="n">SQL_M_TIME</span><span class="p">:</span> <span class="nb">str</span> <span class="o">=</span> <span class="s2">"SELECT m_time FROM properties WHERE name = ?"</span>
|
||
<span class="n">SQL_SET</span><span class="p">:</span> <span class="nb">str</span> <span class="o">=</span> <span class="p">(</span>
|
||
<span class="s2">"INSERT INTO properties (name, value) VALUES (?, ?)"</span>
|
||
<span class="s2">" ON CONFLICT(name) DO UPDATE"</span>
|
||
<span class="s2">" SET value=excluded.value, m_time=strftime('</span><span class="si">%s</span><span class="s2">', 'now')"</span>
|
||
<span class="p">)</span>
|
||
<span class="n">SQL_DELETE</span><span class="p">:</span> <span class="nb">str</span> <span class="o">=</span> <span class="s2">"DELETE FROM properties WHERE name = ?"</span>
|
||
<span class="n">SQL_TABLE_EXISTS</span><span class="p">:</span> <span class="nb">str</span> <span class="o">=</span> <span class="p">(</span>
|
||
<span class="s2">"SELECT name FROM sqlite_master"</span>
|
||
<span class="s2">" WHERE type='table' AND name='properties'"</span>
|
||
<span class="p">)</span> <span class="c1"># fmt:skip</span>
|
||
<span class="n">SQLITE_CONNECT_ARGS</span><span class="p">:</span> <span class="nb">dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="nb">str</span> <span class="o">|</span> <span class="nb">int</span> <span class="o">|</span> <span class="nb">bool</span> <span class="o">|</span> <span class="kc">None</span><span class="p">]</span> <span class="o">=</span> <span class="nb">dict</span><span class="p">(</span><span class="n">SQLiteAppl</span><span class="o">.</span><span class="n">SQLITE_CONNECT_ARGS</span><span class="p">)</span>
|
||
|
||
<span class="c1"># pylint: disable=super-init-not-called</span>
|
||
<span class="k">def</span><span class="w"> </span><span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">db_url</span><span class="p">:</span> <span class="nb">str</span><span class="p">):</span> <span class="c1"># pyright: ignore[reportMissingSuperCall]</span>
|
||
|
||
<span class="bp">self</span><span class="o">.</span><span class="n">db_url</span><span class="p">:</span> <span class="nb">str</span> <span class="o">=</span> <span class="n">db_url</span>
|
||
<span class="bp">self</span><span class="o">.</span><span class="n">_init_done</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span>
|
||
<span class="bp">self</span><span class="o">.</span><span class="n">_compatibility</span><span class="p">()</span>
|
||
|
||
<div class="viewcode-block" id="SQLiteProperties.init">
|
||
<a class="viewcode-back" href="../../src/searx.sqlitedb.html#searx.sqlitedb.SQLiteProperties.init">[docs]</a>
|
||
<span class="k">def</span><span class="w"> </span><span class="nf">init</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">conn</span><span class="p">:</span> <span class="n">sqlite3</span><span class="o">.</span><span class="n">Connection</span><span class="p">)</span> <span class="o">-></span> <span class="nb">bool</span><span class="p">:</span>
|
||
<span class="w"> </span><span class="sd">"""Initializes DB schema of the properties in the DB."""</span>
|
||
|
||
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_init_done</span><span class="p">:</span>
|
||
<span class="k">return</span> <span class="kc">False</span>
|
||
<span class="bp">self</span><span class="o">.</span><span class="n">_init_done</span> <span class="o">=</span> <span class="kc">True</span>
|
||
<span class="n">logger</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span><span class="s2">"init properties of DB: </span><span class="si">%s</span><span class="s2">"</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">db_url</span><span class="p">)</span>
|
||
<span class="n">res</span> <span class="o">=</span> <span class="n">conn</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">SQL_TABLE_EXISTS</span><span class="p">)</span>
|
||
<span class="k">if</span> <span class="n">res</span><span class="o">.</span><span class="n">fetchone</span><span class="p">()</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> <span class="c1"># DB schema needs to be be created</span>
|
||
<span class="bp">self</span><span class="o">.</span><span class="n">create_schema</span><span class="p">(</span><span class="n">conn</span><span class="p">)</span>
|
||
<span class="k">return</span> <span class="kc">True</span></div>
|
||
|
||
|
||
<span class="k">def</span><span class="w"> </span><span class="fm">__call__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span> <span class="n">default</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Any</span> <span class="o">=</span> <span class="kc">None</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Any</span><span class="p">:</span>
|
||
<span class="w"> </span><span class="sd">"""Returns the value of the property ``name`` or ``default`` if property</span>
|
||
<span class="sd"> not exists in DB."""</span>
|
||
|
||
<span class="n">res</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">DB</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">SQL_GET</span><span class="p">,</span> <span class="p">(</span><span class="n">name</span><span class="p">,))</span><span class="o">.</span><span class="n">fetchone</span><span class="p">()</span>
|
||
<span class="k">if</span> <span class="n">res</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
|
||
<span class="k">return</span> <span class="n">default</span>
|
||
<span class="k">return</span> <span class="n">res</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
|
||
|
||
<div class="viewcode-block" id="SQLiteProperties.set">
|
||
<a class="viewcode-back" href="../../src/searx.sqlitedb.html#searx.sqlitedb.SQLiteProperties.set">[docs]</a>
|
||
<span class="k">def</span><span class="w"> </span><span class="nf">set</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span> <span class="n">value</span><span class="p">:</span> <span class="nb">str</span> <span class="o">|</span> <span class="nb">int</span><span class="p">):</span>
|
||
<span class="w"> </span><span class="sd">"""Set ``value`` of property ``name`` in DB. If property already</span>
|
||
<span class="sd"> exists, update the ``m_time`` (and the value)."""</span>
|
||
|
||
<span class="k">with</span> <span class="bp">self</span><span class="o">.</span><span class="n">DB</span><span class="p">:</span>
|
||
<span class="bp">self</span><span class="o">.</span><span class="n">DB</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">SQL_SET</span><span class="p">,</span> <span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">value</span><span class="p">))</span></div>
|
||
|
||
|
||
<div class="viewcode-block" id="SQLiteProperties.delete">
|
||
<a class="viewcode-back" href="../../src/searx.sqlitedb.html#searx.sqlitedb.SQLiteProperties.delete">[docs]</a>
|
||
<span class="k">def</span><span class="w"> </span><span class="nf">delete</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="nb">int</span><span class="p">:</span>
|
||
<span class="w"> </span><span class="sd">"""Delete of property ``name`` from DB."""</span>
|
||
<span class="k">with</span> <span class="bp">self</span><span class="o">.</span><span class="n">DB</span><span class="p">:</span>
|
||
<span class="n">cur</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">DB</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">SQL_DELETE</span><span class="p">,</span> <span class="p">(</span><span class="n">name</span><span class="p">,))</span>
|
||
<span class="k">return</span> <span class="n">cur</span><span class="o">.</span><span class="n">rowcount</span></div>
|
||
|
||
|
||
<div class="viewcode-block" id="SQLiteProperties.row">
|
||
<a class="viewcode-back" href="../../src/searx.sqlitedb.html#searx.sqlitedb.SQLiteProperties.row">[docs]</a>
|
||
<span class="k">def</span><span class="w"> </span><span class="nf">row</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span> <span class="n">default</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Any</span> <span class="o">=</span> <span class="kc">None</span><span class="p">):</span>
|
||
<span class="w"> </span><span class="sd">"""Returns the DB row of property ``name`` or ``default`` if property</span>
|
||
<span class="sd"> not exists in DB."""</span>
|
||
|
||
<span class="n">res</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">DB</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="s2">"SELECT * FROM properties WHERE name = ?"</span><span class="p">,</span> <span class="p">(</span><span class="n">name</span><span class="p">,))</span>
|
||
<span class="n">row</span> <span class="o">=</span> <span class="n">res</span><span class="o">.</span><span class="n">fetchone</span><span class="p">()</span>
|
||
<span class="k">if</span> <span class="n">row</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
|
||
<span class="k">return</span> <span class="n">default</span>
|
||
|
||
<span class="n">col_names</span> <span class="o">=</span> <span class="p">[</span><span class="n">column</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">row</span><span class="o">.</span><span class="n">description</span><span class="p">]</span>
|
||
<span class="k">return</span> <span class="nb">dict</span><span class="p">(</span><span class="nb">zip</span><span class="p">(</span><span class="n">col_names</span><span class="p">,</span> <span class="n">row</span><span class="p">))</span></div>
|
||
|
||
|
||
<div class="viewcode-block" id="SQLiteProperties.m_time">
|
||
<a class="viewcode-back" href="../../src/searx.sqlitedb.html#searx.sqlitedb.SQLiteProperties.m_time">[docs]</a>
|
||
<span class="k">def</span><span class="w"> </span><span class="nf">m_time</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span> <span class="n">default</span><span class="p">:</span> <span class="nb">int</span> <span class="o">=</span> <span class="mi">0</span><span class="p">)</span> <span class="o">-></span> <span class="nb">int</span><span class="p">:</span>
|
||
<span class="w"> </span><span class="sd">"""Last modification time of this property."""</span>
|
||
<span class="n">res</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">DB</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">SQL_M_TIME</span><span class="p">,</span> <span class="p">(</span><span class="n">name</span><span class="p">,))</span>
|
||
<span class="n">row</span> <span class="o">=</span> <span class="n">res</span><span class="o">.</span><span class="n">fetchone</span><span class="p">()</span>
|
||
<span class="k">if</span> <span class="n">row</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
|
||
<span class="k">return</span> <span class="n">default</span>
|
||
<span class="k">return</span> <span class="nb">int</span><span class="p">(</span><span class="n">row</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span></div>
|
||
|
||
|
||
<span class="k">def</span><span class="w"> </span><span class="nf">create_schema</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">conn</span><span class="p">:</span> <span class="n">sqlite3</span><span class="o">.</span><span class="n">Connection</span><span class="p">):</span>
|
||
<span class="k">with</span> <span class="n">conn</span><span class="p">:</span>
|
||
<span class="n">conn</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">DDL_PROPERTIES</span><span class="p">)</span>
|
||
|
||
<span class="k">def</span><span class="w"> </span><span class="fm">__str__</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="nb">str</span><span class="p">:</span>
|
||
<span class="n">lines</span><span class="p">:</span> <span class="nb">list</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="p">[]</span>
|
||
<span class="k">for</span> <span class="n">row</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">DB</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="s2">"SELECT name, value, m_time FROM properties"</span><span class="p">):</span>
|
||
<span class="n">name</span><span class="p">,</span> <span class="n">value</span><span class="p">,</span> <span class="n">m_time</span> <span class="o">=</span> <span class="n">row</span>
|
||
<span class="n">m_time</span> <span class="o">=</span> <span class="n">datetime</span><span class="o">.</span><span class="n">datetime</span><span class="o">.</span><span class="n">fromtimestamp</span><span class="p">(</span><span class="n">m_time</span><span class="p">)</span><span class="o">.</span><span class="n">strftime</span><span class="p">(</span><span class="s2">"%Y-%m-</span><span class="si">%d</span><span class="s2"> %H:%M:%S"</span><span class="p">)</span>
|
||
<span class="n">lines</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="sa">f</span><span class="s2">"[last modified: </span><span class="si">{</span><span class="n">m_time</span><span class="si">}</span><span class="s2">] </span><span class="si">{</span><span class="n">name</span><span class="si">:</span><span class="s2">20s</span><span class="si">}</span><span class="s2">: </span><span class="si">{</span><span class="n">value</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span>
|
||
<span class="k">return</span> <span class="s2">"</span><span class="se">\n</span><span class="s2">"</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">lines</span><span class="p">)</span></div>
|
||
|
||
</pre></div>
|
||
</article>
|
||
</div>
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||
<footer>
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