From 5f14530745dc021f767af57666468be8df77cf39 Mon Sep 17 00:00:00 2001
From: abraunegg <alex.braunegg@gmail.com>
Date: Sat, 2 Aug 2025 11:15:23 +1000
Subject: [PATCH] Fix resumable downloads so that the curl engine offset point
 is reset post successful download (#3406)

* Ensure that post successful download, the resumable offset point is reset to avoid `HTTP request returned status code 416 (Requested Range Not Satisfiable)` if the offset point is not reset and curl engine reused for another download
---
 src/curlEngine.d | 5 +++++
 src/onedrive.d   | 3 +++
 2 files changed, 8 insertions(+)

diff --git a/src/curlEngine.d b/src/curlEngine.d
index 59bc4997..9219ff8e 100644
--- a/src/curlEngine.d
+++ b/src/curlEngine.d
@@ -598,6 +598,11 @@ class CurlEngine {
 	void setDownloadResumeOffset(long offset) {
 		resumeFromOffset = offset;
 	}
+	
+	// reset resumable offset point to negative value
+	void resetDownloadResumeOffset() {
+		resumeFromOffset = -1;
+	}
 }
 
 // Methods to control obtaining and releasing a CurlEngine instance from the curlEnginePool
diff --git a/src/onedrive.d b/src/onedrive.d
index 6f4cd3af..00d72219 100644
--- a/src/onedrive.d
+++ b/src/onedrive.d
@@ -1559,6 +1559,9 @@ class OneDriveApi {
 			
 			// Safe remove 'threadResumeDownloadFilePath' as if we get to this point, the file has been download successfully
 			safeRemove(threadResumeDownloadFilePath);
+			
+			// Reset this curlEngine offset value now that the file has been downloaded successfully
+			curlEngine.resetDownloadResumeOffset();
 
 			// Return the applicable result
 			return result;