myoungpyohong

plugins {
    id 'org.springframework.boot' version '2.1.7.RELEASE'
    id 'io.spring.dependency-management' version '1.0.8.RELEASE'
    id 'java'

    id 'idea'

    id "com.ewerk.gradle.plugins.querydsl" version "1.0.10"
    id "io.franzbecker.gradle-lombok" version "3.2.0"
}

myoungpyohong

Built-in

diskutil erasevolume HFS+ 'RAM Disk' `hdiutil attach -nobrowse -nomount ram://XXXXX`

where XXXXX is the size of the RAM disk in terms of memory blocks.

Notes:

myoungpyohong

export const ws = webSocket<WebsocketMessage>(`wss://${location.hostname}:${location.protocol === 'https:' ? 443 : 80}/ws/`);

export const wsObserver = ws
  .pipe(
    retryWhen(errors =>
      errors.pipe(
        delay(1000)
      )
    )
  );

myoungpyohong

// create 6-digit
public int create6digit() {
    SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");
    int verificationNumber = sr.nextInt(900000) + 100000;
}


@Configuration
public class RetrofitConfig {

myoungpyohong

// get aes256 key : https://asecuritysite.com/encryption/keygen

fun String.encrypt(secret: String): String {
    val keyData = secret.toByteArray()
    val ivData = secret.substring(0, 16).toByteArray()
    val aesKey = SecretKeySpec(keyData, "AES")
    val cipher = Cipher.getInstance("AES/CBC/PKCS5Padding")
    cipher.init(Cipher.ENCRYPT_MODE, aesKey, IvParameterSpec(ivData))
    return String(Base64.getEncoder().encode(cipher.doFinal(this.toByteArray())))
}