fix(core): clean socket handlers causing memory leaks

maxun-core/src/interpret.ts

@@ -460,8 +460,9 @@ export default class Interpreter extends EventEmitter {
         for (const link of links) {
           // eslint-disable-next-line
           this.concurrency.addJob(async () => {
+            let newPage = null;
             try {
-              const newPage = await context.newPage();
+              newPage = await context.newPage();
               await newPage.goto(link);
               await newPage.waitForLoadState('networkidle');
               await this.runLoop(newPage, this.initializedWorkflow!);
@@ -470,6 +471,14 @@ export default class Interpreter extends EventEmitter {
               // but newPage(), goto() and waitForLoadState() don't (and will kill
               // the interpreter by throwing).
               this.log(<Error>e, Level.ERROR);
+            } finally {
+              if (newPage && !newPage.isClosed()) {
+                try {
+                  await newPage.close();
+                } catch (closeError) {
+                  this.log('Failed to close enqueued page', Level.WARN);
+                }
+              }
             }
           });
         }
@@ -1463,41 +1472,57 @@ export default class Interpreter extends EventEmitter {
     * User-requested concurrency should be entirely managed by the concurrency manager,
     * e.g. via `enqueueLinks`.
     */
-    p.on('popup', (popup) => {
+    const popupHandler = (popup) => {
       this.concurrency.addJob(() => this.runLoop(popup, workflowCopy));
-    });
+    };
+    p.on('popup', popupHandler);
 
     /* eslint no-constant-condition: ["warn", { "checkLoops": false }] */
     let loopIterations = 0;
     const MAX_LOOP_ITERATIONS = 1000; // Circuit breaker
+
+    // Cleanup function to remove popup listener
+    const cleanup = () => {
+      try {
+        if (!p.isClosed()) {
+          p.removeListener('popup', popupHandler);
+        }
+      } catch (cleanupError) {
+      }
+    };
     
     while (true) {
       if (this.isAborted) {
         this.log('Workflow aborted during step execution', Level.WARN);
+        cleanup();
         return;
       }
 
       // Circuit breaker to prevent infinite loops
       if (++loopIterations > MAX_LOOP_ITERATIONS) {
         this.log('Maximum loop iterations reached, terminating to prevent infinite loop', Level.ERROR);
+        cleanup();
         return;
       }
       
       // Checks whether the page was closed from outside,
       //  or the workflow execution has been stopped via `interpreter.stop()`
       if (p.isClosed() || !this.stopper) {
+        cleanup();
         return;
       }
 
       try {
         await p.waitForLoadState();
       } catch (e) {
+        cleanup();
         await p.close();
         return;
       }
 
       if (workflowCopy.length === 0) {
         this.log('All actions completed. Workflow finished.', Level.LOG);
+        cleanup();
         return;
       }
 
@@ -1589,6 +1614,7 @@ export default class Interpreter extends EventEmitter {
         }
       } else {
         //await this.disableAdBlocker(p);
+        cleanup();
         return;
       }
     }
@@ -1681,4 +1707,44 @@ export default class Interpreter extends EventEmitter {
       throw new Error('Cannot stop, there is no running workflow!');
     }
   }
+  /**
+   * Cleanup method to release resources and prevent memory leaks
+   * Call this when the interpreter is no longer needed
+   */
+  public async cleanup(): Promise<void> {
+    try {
+      // Stop any running workflows first
+      if (this.stopper) {
+        try {
+          await this.stop();
+        } catch (error: any) {
+          this.log(`Error stopping workflow during cleanup: ${error.message}`, Level.WARN);
+        }
+      }
+
+      // Clear ad-blocker resources
+      if (this.blocker) {
+        try {
+          this.blocker = null;
+          this.log('Ad-blocker resources cleared', Level.DEBUG);
+        } catch (error: any) {
+          this.log(`Error cleaning up ad-blocker: ${error.message}`, Level.WARN);
+        }
+      }
+
+      // Clear accumulated data to free memory
+      this.cumulativeResults = [];
+      this.namedResults = {};
+      this.serializableDataByType = { scrapeList: {}, scrapeSchema: {} };
+
+      // Reset state
+      this.isAborted = false;
+      this.initializedWorkflow = null;
+
+      this.log('Interpreter cleanup completed', Level.DEBUG);
+    } catch (error: any) {
+      this.log(`Error during interpreter cleanup: ${error.message}`, Level.ERROR);
+      throw error;
+    }
+  }
 }