second_attemp.go

var Queue chan Payload

func init() {
    Queue = make(chan Payload, MAX_QUEUE)
}

func payloadHandler(w http.ResponseWriter, r *http.Request) {
    ...
    // Go through each payload and queue items individually to be posted to S3
    for _, payload := range content.Payloads {
        Queue <- payload
    }
    ...
}