couchdb-changes-stream: add abort requst by heartbeat

packages/couchdb-changes-stream/src/CouchDBChangesStream.ts

@@ -86,12 +86,18 @@ export class CouchDBChangesStream<T> {
     let heartbeatTimeout: ReturnType<typeof setTimeout> | null = null;
     let heartbeatPromise: Promise<never> = new Promise<never>(() => {});
 
+    let abortControllerWithHeartbeat: AbortController = new AbortController();
+
     signal.addEventListener("abort", () => {
       if (heartbeatTimeout) {
         clearTimeout(heartbeatTimeout);
         heartbeatTimeout = null;
       }
+      abortControllerWithHeartbeat.abort(signal.reason);
     });
+    if (signal.aborted) {
+      abortControllerWithHeartbeat.abort(signal.reason);
+    }
 
     const resetHeartbeat = () => {
       if (!usesHeartbeat) return;
@@ -100,6 +106,13 @@ export class CouchDBChangesStream<T> {
         clearTimeout(heartbeatTimeout);
       }
 
+      if (abortControllerWithHeartbeat.signal.aborted) {
+        abortControllerWithHeartbeat = new AbortController();
+        if (signal.aborted) {
+          abortControllerWithHeartbeat.abort(signal.reason);
+        }
+      }
+
       const heartbeatInterval =
         typeof this.options.heartbeat === "number"
           ? this.options.heartbeat
@@ -108,11 +121,9 @@ export class CouchDBChangesStream<T> {
       const adjustedTimeout = heartbeatInterval + timeoutBuffer;
       heartbeatPromise = new Promise<never>((resolve, reject) => {
         heartbeatTimeout = setTimeout(() => {
-          reject(
+          const reason = `Heartbeat timeout: no data received from server after ${adjustedTimeout} ms`;
-            new Error(
+          abortControllerWithHeartbeat.abort(reason);
-              `Heartbeat timeout: no data received from server after ${adjustedTimeout} ms`,
+          reject(new Error(reason));
-            ),
-          );
         }, adjustedTimeout);
 
         if (typeof heartbeatTimeout === "object" && heartbeatTimeout.unref) {
@@ -161,7 +172,7 @@ export class CouchDBChangesStream<T> {
                 : {}),
             },
             body,
-            signal,
+            signal: abortControllerWithHeartbeat.signal,
           }),
           heartbeatPromise,
         ]);