Fix Node.js extension loading on Linux (#2899)

tools/nodejs_api/src_js/connection.js

@@ -1,6 +1,6 @@
 "use strict";
 
-const KuzuNative = require("./kuzujs.node");
+const KuzuNative = require("./kuzu_native.js");
 const QueryResult = require("./query_result.js");
 const PreparedStatement = require("./prepared_statement.js");
 

tools/nodejs_api/src_js/database.js

@@ -1,6 +1,6 @@
 "use strict";
 
-const KuzuNative = require("./kuzujs.node");
+const KuzuNative = require("./kuzu_native.js");
 const LoggingLevel = require("./logging_level.js");
 
 class Database {

tools/nodejs_api/src_js/kuzu_native.js

@@ -0,0 +1,25 @@
+/**
+ * This file is a customized loader for the kuzujs.node native module.
+ * It is used to load the native module with the correct flags on Linux so that
+ * extension loading works correctly.
+ * @module kuzu_native
+ * @private
+ */
+
+const process = require("process");
+const constants = require("constants");
+const join = require("path").join;
+
+const kuzuNativeModule = { exports: {} };
+const modulePath = join(__dirname, "kuzujs.node");
+if (process.platform === "linux") {
+  process.dlopen(
+    kuzuNativeModule,
+    modulePath,
+    constants.RTLD_LAZY | constants.RTLD_GLOBAL
+  );
+} else {
+  process.dlopen(kuzuNativeModule, modulePath);
+}
+
+module.exports = kuzuNativeModule.exports;

tools/nodejs_api/test/test_extension.js

@@ -2,8 +2,8 @@ const { assert } = require("chai");
 
 describe("Extension loading", () => {
   it("should install and load httpfs extension", async function () {
+    this.timeout(10000);
     await conn.query("INSTALL httpfs");
-    // Skip this test until the fix is in place
-    // await conn.query("LOAD EXTENSION httpfs");
+    await conn.query("LOAD EXTENSION httpfs");
   });
 });