From 19088aa1787e7e3a6406cba4d509441c056e6f02 Mon Sep 17 00:00:00 2001
From: Petter Rasmussen <petter@hask.no>
Date: Sun, 6 Jun 2021 15:08:33 +0200
Subject: [PATCH] Fix resumable uploads

Only increment the start offset when the response is successful and seek
to the start offset on each iteration.
---
 src/rust/api/client.rs | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/rust/api/client.rs b/src/rust/api/client.rs
index 8e46ef0407..37ab5b5ab3 100644
--- a/src/rust/api/client.rs
+++ b/src/rust/api/client.rs
@@ -694,8 +694,9 @@ impl<'a, A> ResumableUploadHelper<'a, A> {
             _ => MIN_CHUNK_SIZE,
         };
 
-        self.reader.seek(SeekFrom::Start(start)).unwrap();
         loop {
+            self.reader.seek(SeekFrom::Start(start)).unwrap();
+
             let request_size = match self.content_length - start {
                 rs if rs > chunk_size => chunk_size,
                 rs => rs,
@@ -711,7 +712,6 @@ impl<'a, A> ResumableUploadHelper<'a, A> {
                 }),
                 total_length: self.content_length,
             };
-            start += request_size;
             if self.delegate.cancel_chunk_upload(&range_header) {
                 return None;
             }
@@ -730,6 +730,8 @@ impl<'a, A> ResumableUploadHelper<'a, A> {
                 .await;
             match res {
                 Ok(res) => {
+                    start += request_size;
+
                     if res.status() == StatusCode::PERMANENT_REDIRECT {
                         continue;
                     }