JAL-3446 UrlDownloadClient and Test

[jalview.git] / src / jalview / util / Platform.java

diff --git a/src/jalview/util/Platform.java b/src/jalview/util/Platform.java
index c89f1e7..0a6a5c9 100644 (file)
--- a/src/jalview/util/Platform.java
+++ b/src/jalview/util/Platform.java
@@ -33,8 +33,12 @@ import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.io.Reader;
 import java.net.URL;
+import java.nio.channels.Channels;
+import java.nio.channels.ReadableByteChannel;
 import java.nio.file.Files;
 import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.nio.file.StandardCopyOption;
 import java.nio.file.attribute.BasicFileAttributes;
 import java.util.Date;
 import java.util.Locale;
@@ -950,7 +954,54 @@ public class Platform
    */
   public static Locale getLocaleOrNone(Locale loc)
   {
-    return (isJS && loc.getCountry() == "en" ? new Locale("") : loc);
+    return (isJS && loc.getLanguage() == "en" ? new Locale("") : loc);
+  }
+
+  /**
+   * From UrlDownloadClient; trivial in JavaScript; painful in Java.
+   * 
+   * @param urlstring
+   * @param outfile
+   * @throws IOException
+   */
+  public static void download(String urlstring, String outfile)
+          throws IOException
+  {
+    Path temp = null;
+    try (InputStream is = new URL(urlstring).openStream())
+    {
+      if (isJS)
+      { // so much easier!
+        streamToFile(is, new File(outfile));
+        return;
+      }
+      temp = Files.createTempFile(".jalview_", ".tmp");
+      try (FileOutputStream fos = new FileOutputStream(temp.toString());
+              ReadableByteChannel rbc = Channels.newChannel(is))
+      {
+        fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);
+        // copy tempfile to outfile once our download completes
+        // incase something goes wrong
+        Files.copy(temp, Paths.get(outfile),
+                StandardCopyOption.REPLACE_EXISTING);
+      }
+    } catch (IOException e)
+    {
+      throw e;
+    } finally
+    {
+      try
+      {
+        if (temp != null)
+        {
+          Files.deleteIfExists(temp);
+        }
+      } catch (IOException e)
+      {
+        System.out.println("Exception while deleting download temp file: "
+                + e.getMessage());
+      }
+    }
   }
 
 }