move cleanup to function

Author: e3dio

lib/transports-uws/polling.ts

@@ -159,12 +159,12 @@ export class Polling extends Transport {
 
     const onEnd = (buffer) => {
       this.onData(buffer.toString());
-      this.dataReq = this.dataRes = null;
+      this.onDataRequestCleanup();
       res.end("ok");
     };
 
     res.onAborted(() => {
-      this.dataReq = this.dataRes = null;
+      this.onDataRequestCleanup();
       this.onError("data request connection closed prematurely");
     });
 
@@ -190,7 +190,7 @@ export class Polling extends Transport {
         if (totalLength != contentLengthHeader) {
           this.onError("content-length mismatch");
           res.writeStatus("400 content-length mismatch").end();
-          this.dataReq = this.dataRes = null;
+          this.onDataRequestCleanup();
           return;
         }
         onEnd(buffer);
@@ -201,6 +201,15 @@ export class Polling extends Transport {
     });
   }
 
+  /**
+   * Cleanup onDataRequest.
+   *
+   * @api private
+   */
+  onDataRequestCleanup() {
+    this.dataReq = this.dataRes = null;
+  }
+
   /**
    * Processes the incoming data payload.
    *