Backend half

SerpentRace_Backend/node_modules/mariadb/lib/cmd/handshake/client-capabilities.js

@@ -0,0 +1,75 @@
+//  SPDX-License-Identifier: LGPL-2.1-or-later
+//  Copyright (c) 2015-2025 MariaDB Corporation Ab
+
+// noinspection JSBitwiseOperatorUsage
+
+'use strict';
+
+const Capabilities = require('../../const/capabilities');
+
+/**
+ * Initialize client capabilities according to options and server capabilities
+ *
+ * @param opts                options
+ * @param info                information
+ */
+module.exports.init = function (opts, info) {
+  let capabilities =
+    Capabilities.IGNORE_SPACE |
+    Capabilities.PROTOCOL_41 |
+    Capabilities.TRANSACTIONS |
+    Capabilities.SECURE_CONNECTION |
+    Capabilities.MULTI_RESULTS |
+    Capabilities.PS_MULTI_RESULTS |
+    Capabilities.SESSION_TRACK |
+    Capabilities.CONNECT_ATTRS |
+    Capabilities.PLUGIN_AUTH_LENENC_CLIENT_DATA |
+    Capabilities.MARIADB_CLIENT_EXTENDED_METADATA |
+    Capabilities.PLUGIN_AUTH;
+
+  if (opts.foundRows) {
+    capabilities |= Capabilities.FOUND_ROWS;
+  }
+
+  if (opts.permitLocalInfile) {
+    capabilities |= Capabilities.LOCAL_FILES;
+  }
+
+  if (opts.multipleStatements) {
+    capabilities |= Capabilities.MULTI_STATEMENTS;
+  }
+
+  info.eofDeprecated = !opts.keepEof && (info.serverCapabilities & Capabilities.DEPRECATE_EOF) > 0;
+  if (info.eofDeprecated) {
+    capabilities |= Capabilities.DEPRECATE_EOF;
+  }
+
+  if (opts.database && info.serverCapabilities & Capabilities.CONNECT_WITH_DB) {
+    capabilities |= Capabilities.CONNECT_WITH_DB;
+  }
+
+  info.serverPermitSkipMeta = (info.serverCapabilities & Capabilities.MARIADB_CLIENT_CACHE_METADATA) > 0;
+  if (info.serverPermitSkipMeta) {
+    capabilities |= Capabilities.MARIADB_CLIENT_CACHE_METADATA;
+  }
+
+  // use compression only if requested by client and supported by server
+  if (opts.compress) {
+    if (info.serverCapabilities & Capabilities.COMPRESS) {
+      capabilities |= Capabilities.COMPRESS;
+    } else {
+      opts.compress = false;
+    }
+  }
+
+  if (opts.bulk && info.serverCapabilities & Capabilities.MARIADB_CLIENT_STMT_BULK_OPERATIONS) {
+    capabilities |= Capabilities.MARIADB_CLIENT_STMT_BULK_OPERATIONS;
+    capabilities |= Capabilities.BULK_UNIT_RESULTS;
+  }
+
+  if (opts.permitConnectionWhenExpired) {
+    capabilities |= Capabilities.CAN_HANDLE_EXPIRED_PASSWORDS;
+  }
+
+  info.clientCapabilities = capabilities & info.serverCapabilities;
+};