euc-kr_encoding_with_URLEncode.swift

func euckrEncoding(_ query: String) -> String { //EUC-KR 인코딩
        
        let rawEncoding = CFStringConvertEncodingToNSStringEncoding(CFStringEncoding(CFStringEncodings.EUC_KR.rawValue))
        let encoding = String.Encoding(rawValue: rawEncoding)
        
        let eucKRStringData = query.data(using: encoding) ?? Data()
        let outputQuery = eucKRStringData.map {byte->String in
            if byte >= UInt8(ascii: "A") && byte <= UInt8(ascii: "Z")
                || byte >= UInt8(ascii: "a") && byte <= UInt8(ascii: "z")
                || byte >= UInt8(ascii: "0") && byte <= UInt8(ascii: "9")
                || byte == UInt8(ascii: "_") || byte == UInt8(ascii: ".") || byte == UInt8(ascii: "-")
            {
                return String(Character(UnicodeScalar(UInt32(byte))!))
            } else if byte == UInt8(ascii: " ") {
                return "+"
            } else {
                return String(format: "%%%02X", byte)
            }
            }.joined()
        
        return outputQuery
    }