File download problem in my scala code

Question

I have written the following scala code to download a file . The file gets downloaded correctly but also an exception is thrown. The code is as follows :

var         


        

Answer 1

An alternative option is to use the system commands which is much cleaner and faster from what I can tell.

import sys.process._
import java.net.URL
import java.io.File

new URL("http://somehost.com/file.doc") #> new File("test.doc") !!

Answer 2

Scala returns type Unit, not the type of the value being assigned, with an assignment statement. So

numRead = in.read(buffer)

never returns -1; it doesn't even return an integer. You can write

while( { numRead = in.read(buffer); numRead != -1 } ) out.write(buffer, 0, numRead)

or you can go for a more functional style with

Iterator.continually(in.read(buffer)).takeWhile(_ != -1).foreach(n => out.write(buffer,0,n))

Personally, I prefer the former since it's shorter (and relies less on iterator evaluation happening the way "it ought to").