public int downloadTesting() { int retCode = 1; while (retCode < 4 && retCode != 0) { request(); int code = getHeadCode(); if (code == N403 | code == N404) { retCode = 4; } else if (code == N206) { retCode = 1; break; } else if (code == N200) { retCode = 0; } else { retCode += 1; } } return retCode; }