Add database ratelimiting backend

In case no distributed memory cache is specified this adds
a database backend for ratelimit purposes.

Signed-off-by: Lukas Reschke <lukas@statuscode.ch>

1 files changed, 47 insertions, 0 deletions

diff --git a/core/Migrations/Version23000Date20210906132259.php b/core/Migrations/Version23000Date20210906132259.php
new file mode 100644
index 00000000000..b0eb7bc4dcc
--- /dev/null
+++ b/core/Migrations/Version23000Date20210906132259.php
@@ -0,0 +1,47 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OC\Core\Migrations;
+
+use Closure;
+use OCP\DB\ISchemaWrapper;
+use OCP\DB\Types;
+use OCP\Migration\IOutput;
+use OCP\Migration\SimpleMigrationStep;
+
+/**
+ * Auto-generated migration step: Please modify to your needs!
+ */
+class Version23000Date20210906132259 extends SimpleMigrationStep {
+	private const TABLE_NAME = 'ratelimit_entries';
+
+	/**
+	 * @param IOutput $output
+	 * @param Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
+	 * @param array $options
+	 * @return null|ISchemaWrapper
+	 */
+	public function changeSchema(IOutput $output, Closure $schemaClosure, array $options): ?ISchemaWrapper {
+		/** @var ISchemaWrapper $schema */
+		$schema = $schemaClosure();
+
+		$hasTable = $schema->hasTable(self::TABLE_NAME);
+
+		if(!$hasTable)
+		{
+			$table = $schema->createTable(self::TABLE_NAME);
+			$table->addColumn('hash', Types::STRING, [
+				'notnull' => true,
+				'length' => 128,
+			]);
+			$table->addColumn('timestamp', 'datetime', [
+				'notnull' => true,
+			]);
+			$table->addIndex(['hash'], 'ratelimit_hash_idx');
+			$table->addIndex(['timestamp'], 'ratelimit_timestamp_idx');
+		}
+
+		return $schema;
+	}
+}