+/*
+ * Jalview - A Sequence Alignment Editor and Viewer ($$Version-Rel$$)
+ * Copyright (C) $$Year-Rel$$ The Jalview Authors
+ *
+ * This file is part of Jalview.
+ *
+ * Jalview is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 3
+ * of the License, or (at your option) any later version.
+ *
+ * Jalview is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ * PURPOSE. See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Jalview. If not, see <http://www.gnu.org/licenses/>.
+ * The Jalview Authors are detailed in the 'AUTHORS' file.
+ */
+
+package jalview.ws.utils;
+
+import java.io.FileOutputStream;
+import java.io.IOException;
+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;
+
+public class UrlDownloadClient
+{
+ public UrlDownloadClient()
+ {
+
+ }
+
+ /**
+ * Download and save a file from a URL
+ *
+ * @param urlstring
+ * url to download from, as string
+ * @param outfile
+ * the name of file to save the URLs to
+ * @throws IOException
+ */
+ public void download(String urlstring, String outfile) throws IOException
+ {
+ FileOutputStream fos = null;
+ ReadableByteChannel rbc = null;
+ Path temp = null;
+ try
+ {
+ temp = Files.createTempFile(".jalview_", ".tmp");
+
+ URL url = new URL(urlstring);
+ rbc = Channels.newChannel(url.openStream());
+ fos = new FileOutputStream(temp.toString());
+ 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 (fos != null)
+ {
+ fos.close();
+ }
+ } catch (IOException e)
+ {
+ System.out
+ .println("Exception while closing download file output stream: "
+ + e.getMessage());
+ }
+ try
+ {
+ if (rbc != null)
+ {
+ rbc.close();
+ }
+ } catch (IOException e)
+ {
+ System.out.println("Exception while closing download channel: "
+ + e.getMessage());
+ }
+ try
+ {
+ if (temp != null)
+ {
+ Files.deleteIfExists(temp);
+ }
+ } catch (IOException e)
+ {
+ System.out.println("Exception while deleting download temp file: "
+ + e.getMessage());
+ }
+ }
+ }
+}