2 * Jalview - A Sequence Alignment Editor and Viewer ($$Version-Rel$$)
3 * Copyright (C) $$Year-Rel$$ The Jalview Authors
5 * This file is part of Jalview.
7 * Jalview is free software: you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation, either version 3
10 * of the License, or (at your option) any later version.
12 * Jalview is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty
14 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR
15 * PURPOSE. See the GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with Jalview. If not, see <http://www.gnu.org/licenses/>.
19 * The Jalview Authors are detailed in the 'AUTHORS' file.
23 import java.io.BufferedInputStream;
25 import java.io.FileOutputStream;
26 import java.io.IOException;
27 import java.io.InputStream;
30 public class HttpUtils
34 * Returns true if it is possible to open an input stream at the given URL,
35 * else false. The input stream is closed.
40 public static boolean isValidUrl(String url)
42 InputStream is = null;
45 is = new URL(url).openStream();
50 } catch (IOException x)
52 // MalformedURLException, FileNotFoundException
61 } catch (IOException e)
71 * download from given URL and return a pointer to temporary file
73 public static File fetchURLToTemp(String url) throws OutOfMemoryError,
76 long time = System.currentTimeMillis();
77 URL rcall = new URL(url);
79 InputStream is = new BufferedInputStream(rcall.openStream());
83 outFile = File.createTempFile("jalview", ".xml");
84 outFile.deleteOnExit();
85 if (outFile.length() == 0)
90 } catch (Exception ex)
96 FileOutputStream fio = new FileOutputStream(outFile);
97 byte[] bb = new byte[32 * 1024];
99 while ((l = is.read(bb)) > 0)