From 335eab326d43c34c321c58eea6d1c28b59025de3 Mon Sep 17 00:00:00 2001
From: abraunegg <alex.braunegg@gmail.com>
Date: Wed, 9 Dec 2020 14:03:49 +1100
Subject: [PATCH] Handle case where API provided deltaLink generates a further
 API error (#1175)

* Handle case where API provided deltaLink generates a further API error. Refer to: https://github.com/OneDrive/onedrive-api-docs/issues/1408
---
 src/sync.d | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/sync.d b/src/sync.d
index 704039b1..dcf46d1e 100644
--- a/src/sync.d
+++ b/src/sync.d
@@ -1452,6 +1452,12 @@ final class SyncEngine
 						}
 					} else {
 						// Default operation if not 404, 410, 429, 500 or 504 errors
+						// Issue #1174 handling where stored deltaLink is invalid
+						if ((e.httpStatusCode == 400) && (deltaLink != "")) {
+							// Set deltaLink to an empty entry so invalid URL is not reused
+							string emptyDeltaLink = "";
+							itemdb.setDeltaLink(driveId, idToQuery, emptyDeltaLink);
+						}
 						// display what the error is
 						displayOneDriveErrorMessage(e.msg);
 						return;