RDBC-908 Handle undici imports in createAgent more robustly to avoid issues in certain environments

Author: M4xymm

src/Http/RequestExecutor.ts

@@ -378,15 +378,28 @@ export class RequestExecutor implements IDisposable {
         }
     }
 
-    private static async createAgent(options: Agent.Options) {
+private static async createAgent(options: Agent.Options) {
+    try {
+        let AgentInstance;
+
         try {
-            const { Agent: AgentInstance } = await import(importFix("undici"));
-            return new AgentInstance(options);
+            const undiciModule = await import(importFix("undici"));
+            AgentInstance = undiciModule.Agent;
         } catch (err) {
-            // If we can't import undici - we might be in cloudflare env - simply return no-agent.
-            return null;
+            const undiciModule = await import("undici");
+            AgentInstance = undiciModule.Agent;
+        }
+
+        if (!AgentInstance) {
+            throw new Error("Agent not found in undici module");
         }
+
+        return new AgentInstance(options);
+    } catch (err) {
+        // If we can't import undici - we might be in cloudflare env - simply return no-agent.
+        return null;
     }
+}
 
     public getTopologyNodes(): ServerNode[] {
         const topology = this.getTopology();