package main import ( "encoding/base64" "fmt" "net/http" ) func crmpixel(w http.ResponseWriter, r *http.Request) { b64pixel := "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAABmJLR0QA/wD/AP+gvaeTAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB3RJTUUH4QcIBzEJ3JY/6wAAAAh0RVh0Q29tbWVudAD2zJa/AAAADUlEQVQI12NgYGBgAAAABQABXvMqOgAAAABJRU5ErkJggg==" pixel, err := base64.StdEncoding.DecodeString(b64pixel) if err == nil { w.Write(pixel) } else { fmt.Fprint(w, "decodig wrong") } }