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package froala.editor;
import java.io.UnsupportedEncodingException;
import java.security.InvalidKeyException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Calendar;
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import org.apache.commons.codec.binary.Hex;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.multipart.MultipartFile;
import egovframework.rte.fdl.cmmn.exception.EgovBizException;
/**
* Basic utils.
*
* @author florin@froala.com
*
*/
public final class Utils {
private static final Logger LOGGER = LoggerFactory.getLogger(Utils.class);
/**
* Private constructor.
*/
private Utils() {
}
public static String generateUniqueString() throws NoSuchAlgorithmException {
String miliseconds = System.currentTimeMillis() + "";
MessageDigest d = null;
d = java.security.MessageDigest.getInstance("SHA-256");
d.reset();
d.update(miliseconds.getBytes());
return bytesToHex(d.digest());
}
public static String bytesToHex(byte[] in) {
StringBuilder builder = new StringBuilder();
for (byte b : in) {
builder.append(String.format("%02x", b));
}
return builder.toString();
}
// public static String getFileName(Part part) {
// for (String cd : part.getHeader("content-disposition").split(";")) {
// if (cd.trim().startsWith("filename")) {
// return cd.substring(cd.indexOf('=') + 1).trim().replace("\"", "");
// }
// }
// return null;
// }
public static String getFileName(MultipartFile file) {
if( !file.isEmpty() ) {
return file.getOriginalFilename();
};
return null;
}
public static byte[] hmac(byte[] key, String data) {
Mac sha256_HMAC;
byte[] result = null;
try {
sha256_HMAC = Mac.getInstance("HmacSHA256");
SecretKeySpec secret_key = new SecretKeySpec(key, "HmacSHA256");
sha256_HMAC.init(secret_key);
result = sha256_HMAC.doFinal(data.getBytes("UTF-8"));
} catch (NoSuchAlgorithmException | InvalidKeyException | IllegalStateException | UnsupportedEncodingException e) {
return null;
}
return result;
}
public static String hmac_hex(byte[] key, String data) throws EgovBizException {
return new String(Hex.encodeHex(hmac(key, data)));
}
public static String getAddDateRoute(String route) {
if( route == null ) return "";
// 파일 저장 경로에 날짜 추가
Calendar cal = Calendar.getInstance();
//현재 년도, 월, 일
int year = cal.get(Calendar.YEAR);
int month = cal.get(Calendar.MONTH) + 1;
int date = cal.get(Calendar.DATE);
return route + year + "/" + month + "/" + date + "/";
}
public static String getAddTempRoute(String route) {
if( route == null ) return "";
// 파일 저장 경로에 임시경로 추가
String directory = null;
try {
directory = Utils.generateUniqueString();
} catch (NoSuchAlgorithmException e) {
LOGGER.error("NoSuchAlgorithmException! {}", e);
directory = "";
}
return route + directory + "/";
}
}