How to set metadata such as Content-Type: gzip for media upload?

[burcugen]

I'm using createSimpleUpload method for uploading a gzipped png file.

I tried both sending queryParamaters array like:

["Content-Encoding" : "gzip"]

And also tried to send Content Encoding under MediaType:

mediaType: MediaType(type: "image", subType: "png", parameters: ["Content-Encoding" : "gzip"])

Both did failed.

I expected result as following. I think It needs to be set to httpHeaders, How can I pass Content-Encoding as metadata of object?

[burcugen]

Update: After passing headerParameters: [String: String]? to createSimpleUpload.

        var headers: HTTPHeaders = [HTTPHeaderName.contentType.description: mediaType.description]
        if let headerParameters = headerParameters{
            for (key,value) in headerParameters{
                headers.add(name: key, value: value)
            }
        }

Is there any method that I can use? Thanks in advance.