Scala: How to ignore 'SSLHandshakeException'

Question

With such code:

val html = Source.fromURL(\"https://scans.io/json\")

Getting exception:

Exception in thread \"main\" javax.net.         


        

Answer 1

You can achieve this by configuring a SSLContext.

Here is a working code

import javax.net.ssl._
import java.security.cert.X509Certificate
import scala.io.Source

// Bypasses both client and server validation.
object TrustAll extends X509TrustManager {
  val getAcceptedIssuers = null

  def checkClientTrusted(x509Certificates: Array[X509Certificate], s: String) = {}

  def checkServerTrusted(x509Certificates: Array[X509Certificate], s: String) = {}
}

// Verifies all host names by simply returning true.
object VerifiesAllHostNames extends HostnameVerifier {
  def verify(s: String, sslSession: SSLSession) = true
}

// Main class
object Test extends App {
  // SSL Context initialization and configuration
  val sslContext = SSLContext.getInstance("SSL")
  sslContext.init(null, Array(TrustAll), new java.security.SecureRandom())
  HttpsURLConnection.setDefaultSSLSocketFactory(sslContext.getSocketFactory)
  HttpsURLConnection.setDefaultHostnameVerifier(VerifiesAllHostNames)

  // Actual call
  val html = Source.fromURL("https://scans.io/json")
  println(html.mkString)
}

How it works

Source.fromURL uses java.net.HttpURLConnection behind the scene. So this code simply works because TrustAll bypasses checkClientTrusted and checkServerTrusted methods.