s3.PutObject() 'x-amz-content-sha256' header does not match

[ando-masaki]

s3.PutObject() always returns error "The provided 'x-amz-content-sha256' header does not match what was computed.".

How can I fix it?

[iNickGo]

do you have sample code that will get this error?

[ando-masaki]

Following way, I caught error "The provided 'x-amz-content-sha256' header does not match what was computed.".

        bucket := "foo"
        key := "bar"
        req := s3.PutObjectInput{
                ACL:             aws.String("private"),
                Body:            aws.ReadSeekCloser(buf),
                Bucket:          aws.String(bucket),
                ContentEncoding: aws.String("gzip"),
                ContentLength: aws.Long(int64(buf.Len())),
                ContentMD5: func() *string {
                        h := md5.New()
                        h.Write(buf.Bytes())
                        return aws.String(base64.StdEncoding.EncodeToString(h.Sum(nil)))
                }(),
                ContentType: aws.String("application/x-gzip"),
                Key:         key,
        }
        if _, err = cfg.S3.PutObject(&req); err != nil {
                log.Fatal(err)
        }

I solved it to change Body parameter and not use ContentLength.

        bucket := "foo"
        key := "bar"
        req := s3.PutObjectInput{
                ACL:             aws.String("private"),
                Body:            bytes.NewReader(buf.Bytes()),
                Bucket:          aws.String(bucket),
                ContentEncoding: aws.String("gzip"),
                ContentMD5: func() *string {
                        h := md5.New()
                        h.Write(buf.Bytes())
                        return aws.String(base64.StdEncoding.EncodeToString(h.Sum(nil)))
                }(),
                ContentType: aws.String("application/x-gzip"),
                Key:         key,
        }
        if _, err = cfg.S3.PutObject(&req); err != nil {
                log.Fatal(err)
        }

[lsegal]

The sample provided is the correct way to send this request.

[ando-masaki]

And I used ContentLength, I caught following error.

A header you provided implies functionality that is not implemented

Therefore, I don't use ContentLength.

[lsegal]

@ando-masaki generally you don't need to provide a ContentLength manually as the SDK will generate this for you. This is only needed if you want to override the default behavior or if the SDK cannot determine the length itself. I am going to mark this as closed since you got it working, but we will be making improvements to the PutObject parameters in the near future. Thanks for reporting!