java.io.IOException: Hostname was not verified

Question

I am trying to connect to a URL from a my Android app in Andorid Version 4.1.1, and I get the error indicated in the Title of my question, but when I tried to connect the sa

Answer 1

In Kotlin:

fun HttpsURLConnection.trustCert() {
            try {
                //Accepts every hostname
                this.hostnameVerifier = HostnameVerifier { hostname, _ ->
                    println(hostname) //To be hardcoded/as needed
                    true
                }
                val trustMgr:Array = arrayOf(object : X509TrustManager {
                    override fun checkClientTrusted(certs: Array?, authType: String?) {}
                    override fun checkServerTrusted(certs: Array?, authType: String?) {}
                    override fun getAcceptedIssuers(): Array? = null
                })
                this.sslSocketFactory = SSLContext.getInstance("TLS").also {
                    it.init(null, trustMgr, SecureRandom())
                }.socketFactory
            } catch (e: Exception) {
                prinntln("SSL self-signed certificate processing error due to ${e.message}")
            }
        }

Usage:

val conn = URL(Uri.Builder().also { 
    it.scheme("https")
    it.encodedAuthority("$serverIp:$serverPort")
}.build().toString()).openConnection() as HttpsURLConnection
conn.trustCert()
val respCode = conn.responseCode
if(respCode == 200) {
    //do something (eg: read inputStream)
}