Automated tool downloads are made more robust by using HTTP download retries.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@23122 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/FilePath.java

@@ -58,6 +58,7 @@ import org.apache.commons.io.IOUtils;
 import org.apache.commons.io.input.CountingInputStream;
 import org.apache.commons.fileupload.FileItem;
 import org.kohsuke.stapler.Stapler;
+import org.jvnet.robust_http_client.RetryableHttpStream;
 
 import java.io.BufferedInputStream;
 import java.io.BufferedOutputStream;
@@ -557,7 +558,9 @@ public final class FilePath implements Serializable {
         if(listener!=null)
             listener.getLogger().println(message);
 
-        CountingInputStream cis = new CountingInputStream(con.getInputStream());
+        // for HTTP downloads, enable automatic retry for added resilience
+        InputStream in = archive.getProtocol().equals("http") ? new RetryableHttpStream(archive) : con.getInputStream();
+        CountingInputStream cis = new CountingInputStream(in);
         try {
             if(archive.toExternalForm().endsWith(".zip"))
             unzipFrom(cis);