Small Hack To Check If Remote Http
Small hack to check if a remote HTTP server is accessible or not. Relying on just DNS resolution test is not enough, it is mandatory to try to get the content.
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| import scala.concurrent._ | |
| import ExecutionContext.Implicits.global | |
| val f = future { new java.net.URL("http://mvnrepository.com/artifact/com.jcraft/jsch").openConnection() } | |
| .map { cnx => | |
| cnx.setConnectTimeout(5000) | |
| cnx.setReadTimeout(5000) | |
| cnx.setAllowUserInteraction(false) | |
| cnx.setUseCaches(false) | |
| cnx } | |
| .map { _.getInputStream } | |
| .map { io.Source.fromInputStream(_) } | |
| .collect { case x => println("then download latest release") } | |
| .recover { case _ => println("then only use local backup") } | |
| //Await.ready(f, duration.Duration.Inf) |