From 7eef0b6e25c7d70acf382c40ac8232fe37351aca Mon Sep 17 00:00:00 2001
From: Rob Watson <rob@netflux.io>
Date: Mon, 22 Nov 2021 18:54:31 +0100
Subject: [PATCH] Fixes uploaded to sort completedParts before completing the
 upload

---
 backend/media/uploader.go | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/backend/media/uploader.go b/backend/media/uploader.go
index ce1a509..3cc3c15 100644
--- a/backend/media/uploader.go
+++ b/backend/media/uploader.go
@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"io"
 	"log"
+	"sort"
 	"sync"
 
 	"github.com/aws/aws-sdk-go-v2/aws"
@@ -187,6 +188,11 @@ outer:
 		uploadedBytes += result.size
 	}
 
+	// the parts may be out of order, especially with slow network conditions:
+	sort.Slice(completedParts, func(i, j int) bool {
+		return completedParts[i].PartNumber < completedParts[j].PartNumber
+	})
+
 	completeInput := s3.CompleteMultipartUploadInput{
 		Bucket:          aws.String(bucket),
 		Key:             aws.String(key),