gistfile1.txt

private func makeChunkRequest(sessionId: String, offset: Int64, totalBytes: Int64) -> URLRequest {
    var request = URLRequest(url: url("level3/uploads/\(sessionId)/chunk"))
    request.httpMethod = "PUT"
    request.setValue("application/octet-stream", forHTTPHeaderField: "Content-Type")
    request.setValue("\(offset)", forHTTPHeaderField: "Upload-Offset")
    request.setValue("\(totalBytes)", forHTTPHeaderField: "Upload-Length")
    return request
}