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Groovy File and URL MD5

/ Published in: Groovy
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Generating MD5 HEX string from either URL or File instance in Groovy (more elegant than the Java version).

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  1. import java.security.MessageDigest
  2.  
  3. def generateMD5(final file) {
  4.    MessageDigest digest = MessageDigest.getInstance("MD5")
  5.    file.withInputStream(){is->
  6.    byte[] buffer = new byte[8192]
  7.    int read = 0
  8.       while( (read = is.read(buffer)) > 0) {
  9.              digest.update(buffer, 0, read);
  10.          }
  11.      }
  12.    byte[] md5sum = digest.digest()
  13.    BigInteger bigInt = new BigInteger(1, md5sum)
  14.    return bigInt.toString(16)
  15. }

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