fix: Suppress 499 error reporting (#13165)

app/utils/ApiClient.ts

@@ -12,6 +12,7 @@ import {
   AuthorizationError,
   BadGatewayError,
   BadRequestError,
+  ClientClosedRequestError,
   NetworkError,
   NotFoundError,
   OfflineError,
@@ -311,6 +312,12 @@ class ApiClient {
       );
     }
 
+    // The client, or an intermediate proxy, closed the connection before the
+    // response was received – there is nothing actionable to report.
+    if (response.status === 499) {
+      throw new ClientClosedRequestError(error.message);
+    }
+
     const err = new RequestError(`Error ${response.status}`);
     Logger.error("Request failed", err, {
       ...error,

app/utils/errors.ts

@@ -30,6 +30,9 @@ export class UnprocessableEntityError extends ExtendableError {}
 /** Error thrown when the client has exceeded the allowed request rate. */
 export class RateLimitExceededError extends ExtendableError {}
 
+/** Error thrown when the client closed the connection before a response. */
+export class ClientClosedRequestError extends ExtendableError {}
+
 /** Error thrown when a request fails for a generic reason. */
 export class RequestError extends ExtendableError {}
 

app/utils/sentry.ts

@@ -4,6 +4,7 @@ import env from "~/env";
 import {
   AuthorizationError,
   BadRequestError,
+  ClientClosedRequestError,
   NetworkError,
   NotFoundError,
   OfflineError,
@@ -22,6 +23,7 @@ export function initSentry(history: History) {
   const ignoredErrorTypes = [
     AuthorizationError,
     BadRequestError,
+    ClientClosedRequestError,
     NetworkError,
     NotFoundError,
     OfflineError,