Retry on XAmzContentSHA256Mismatch

src/duplicacy_s3storage.go

@@ -5,6 +5,9 @@
 package duplicacy
 
 import (
+    "strings"
+    "reflect"
+
     "github.com/aws/aws-sdk-go/aws"
     "github.com/aws/aws-sdk-go/aws/awserr"
     "github.com/aws/aws-sdk-go/aws/credentials"
@@ -227,6 +230,9 @@ func (storage *S3Storage) DownloadFile(threadIndex int, filePath string, chunk *
 // UploadFile writes 'content' to the file at 'filePath'.
 func (storage *S3Storage) UploadFile(threadIndex int, filePath string, content []byte) (err error) {
 
+    attempts := 0
+
+    for {
         input := &s3.PutObjectInput {
             Bucket: aws.String(storage.bucket),
             Key: aws.String(storage.storageDir + filePath),
@@ -236,6 +242,14 @@ func (storage *S3Storage) UploadFile(threadIndex int, filePath string, content [
         }
 
         _, err = storage.client.PutObject(input)
+        if err == nil || attempts >= 3 || !strings.Contains(err.Error(), "XAmzContentSHA256Mismatch")  {
+            return err
+        }
+
+        LOG_INFO("S3_RETRY", "Retrying on %s: %v", reflect.TypeOf(err), err)
+        attempts += 1
+    }
+    
     return err
 }