From 2b1bb1dc4a840a139e5f7823fea0641f7a7c91f8 Mon Sep 17 00:00:00 2001
From: Mikhail Pozdnyakov <mikhail.pozdnyakov@mapbox.com>
Date: Thu, 27 Feb 2020 15:16:35 +0200
Subject: [PATCH] [core][offline] Offline download does not hang on 404 error

---
 platform/default/src/mbgl/storage/offline_download.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/platform/default/src/mbgl/storage/offline_download.cpp b/platform/default/src/mbgl/storage/offline_download.cpp
index 89fd100aa..e1413b61b 100644
--- a/platform/default/src/mbgl/storage/offline_download.cpp
+++ b/platform/default/src/mbgl/storage/offline_download.cpp
@@ -484,6 +484,13 @@ void OfflineDownload::ensureResource(Resource&& resource,
         *fileRequestsIt = onlineFileSource.request(resource, [=](Response onlineResponse) {
             if (onlineResponse.error) {
                 observer->responseError(*onlineResponse.error);
+                if (onlineResponse.error->reason == Response::Error::Reason::NotFound) {
+                    // On error 404, we skip this request and go further.
+                    requests.erase(fileRequestsIt);
+                    assert(status.requiredResourceCount > 0);
+                    status.requiredResourceCount--;
+                    continueDownload();
+                }
                 return;
             }