fix polling logic on network errors #995

ts/receiver/receiver.ts

@@ -126,7 +126,6 @@ async function handleRequestDetail(
   lastPromise: Promise<any>
 ): Promise<void> {
   const { textsecure } = window;
-
   const envelope: any = SignalService.Envelope.decode(plaintext);
 
   // After this point, decoding errors are not the server's
@@ -166,7 +165,9 @@ async function handleRequestDetail(
     // receiving pipeline refactor. It is to be implemented in the next PR.
 
     // To ensure that we queue in the same order we receive messages
+
     await lastPromise;
+
     queueEnvelope(envelope);
   } catch (error) {
     window.log.error(

ts/session/snode_api/serviceNodeAPI.ts

@@ -387,6 +387,8 @@ export async function retrieveNextMessages(
     const json = JSON.parse(res.body);
     return json.messages || [];
   } catch (e) {
+    window.log.warn('exception while parsing json of nextMessage:', e);
+
     return [];
   }
 }

ts/session/snode_api/swarmPolling.ts

@@ -21,7 +21,6 @@ export function processMessage(message: string, options: any = {}) {
   try {
     const dataPlaintext = new Uint8Array(StringUtils.encode(message, 'base64'));
     const messageBuf = SignalService.WebSocketMessage.decode(dataPlaintext);
-
     if (messageBuf.type === SignalService.WebSocketMessage.Type.REQUEST) {
       // tslint:disable-next-line no-floating-promises
       Receiver.handleRequest(messageBuf.request?.body, options);
@@ -48,8 +47,7 @@ export class SwarmPolling {
 
   public async start(): Promise<void> {
     this.loadGroupIds();
-    // tslint:disable: no-floating-promises
-    this.pollForAllKeys();
+    void this.pollForAllKeys();
   }
 
   public addGroupId(pubkey: PubKey) {
@@ -133,7 +131,7 @@ export class SwarmPolling {
 
     const lastMessage = _.last(messages);
 
-    this.updateLastHash(
+    await this.updateLastHash(
       edkey,
       pubkey,
       lastMessage.hash,
@@ -187,10 +185,13 @@ export class SwarmPolling {
     const groupPromises = this.groupPubkeys.map(async pk => {
       return this.pollOnceForKey(pk, true);
     });
-
-    await Promise.all(_.concat(directPromises, groupPromises));
-
-    setTimeout(this.pollForAllKeys.bind(this), 2000);
+    try {
+      await Promise.all(_.concat(directPromises, groupPromises));
+    } catch (e) {
+      window.log.warn('pollForAllKeys swallowing exception: ', e);
+    } finally {
+      setTimeout(this.pollForAllKeys.bind(this), 2000);
+    }
   }
 
   private async updateLastHash(