Backend half

SerpentRace_Backend/node_modules/mariadb/lib/cmd/reset.js

@@ -0,0 +1,50 @@
+//  SPDX-License-Identifier: LGPL-2.1-or-later
+//  Copyright (c) 2015-2024 MariaDB Corporation Ab
+
+'use strict';
+
+const Command = require('./command');
+const ServerStatus = require('../const/server-status');
+const RESET_COMMAND = new Uint8Array([1, 0, 0, 0, 0x1f]);
+/**
+ * send a COM_RESET_CONNECTION: permits to reset a connection without re-authentication.
+ * see https://mariadb.com/kb/en/library/com_reset_connection/
+ */
+class Reset extends Command {
+  constructor(cmdParam, resolve, reject) {
+    super(cmdParam, resolve, reject);
+  }
+
+  start(out, opts, info) {
+    if (opts.logger.query) opts.logger.query('RESET');
+    this.onPacketReceive = this.readResetResponsePacket;
+    out.fastFlush(this, RESET_COMMAND);
+    this.emit('send_end');
+  }
+
+  /**
+   * Read response packet.
+   * packet can be :
+   * - an ERR_Packet
+   * - a OK_Packet
+   *
+   * @param packet  query response
+   * @param out     output writer
+   * @param opts    connection options
+   * @param info    connection info
+   */
+  readResetResponsePacket(packet, out, opts, info) {
+    packet.skip(1); //skip header
+    packet.skipLengthCodedNumber(); //affected rows
+    packet.skipLengthCodedNumber(); //insert ids
+
+    info.status = packet.readUInt16();
+    if (info.redirectRequest && (info.status & ServerStatus.STATUS_IN_TRANS) === 0) {
+      info.redirect(info.redirectRequest, this.successEnd.bind(this));
+    } else {
+      this.successEnd();
+    }
+  }
+}
+
+module.exports = Reset;