1 files changed, 127 insertions, 0 deletions
diff --git a/subsonic-main/src/main/java/net/sourceforge/subsonic/util/Util.java b/subsonic-main/src/main/java/net/sourceforge/subsonic/util/Util.java
new file mode 100644
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+++ b/subsonic-main/src/main/java/net/sourceforge/subsonic/util/Util.java
@@ -0,0 +1,127 @@
+/*
+ This file is part of Subsonic.
+
+ Subsonic 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.
+
+ Subsonic 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 Subsonic.  If not, see <http://www.gnu.org/licenses/>.
+
+ Copyright 2009 (C) Sindre Mehus
+ */
+package net.sourceforge.subsonic.util;
+
+import net.sourceforge.subsonic.Logger;
+
+import javax.servlet.ServletResponse;
+import javax.servlet.http.HttpServletResponse;
+import java.net.InetAddress;
+import java.net.NetworkInterface;
+import java.net.Inet4Address;
+import java.util.Enumeration;
+import java.util.Random;
+
+/**
+ * Miscellaneous general utility methods.
+ *
+ * @author Sindre Mehus
+ */
+public final class Util {
+
+    private static final Logger LOG = Logger.getLogger(Util.class);
+    private static final Random RANDOM = new Random(System.currentTimeMillis());
+
+    /**
+     * Disallow external instantiation.
+     */
+    private Util() {
+    }
+
+    public static String getDefaultMusicFolder() {
+        String def = isWindows() ? "c:\\music" : "/var/music";
+        return System.getProperty("subsonic.defaultMusicFolder", def);
+    }
+
+    public static String getDefaultPodcastFolder() {
+        String def = isWindows() ? "c:\\music\\Podcast" : "/var/music/Podcast";
+        return System.getProperty("subsonic.defaultPodcastFolder", def);
+    }
+
+    public static String getDefaultPlaylistFolder() {
+        String def = isWindows() ? "c:\\playlists" : "/var/playlists";
+        return System.getProperty("subsonic.defaultPlaylistFolder", def);
+    }
+
+    public static boolean isWindows() {
+        return System.getProperty("os.name", "Windows").toLowerCase().startsWith("windows");
+    }
+
+    public static boolean isWindowsInstall() {
+        return "true".equals(System.getProperty("subsonic.windowsInstall"));
+    }
+
+    /**
+     * Similar to {@link ServletResponse#setContentLength(int)}, but this
+     * method supports lengths bigger than 2GB.
+     * <p/>
+     * See http://blogger.ziesemer.com/2008/03/suns-version-of-640k-2gb.html
+     *
+     * @param response The HTTP response.
+     * @param length   The content length.
+     */
+    public static void setContentLength(HttpServletResponse response, long length) {
+        if (length <= Integer.MAX_VALUE) {
+            response.setContentLength((int) length);
+        } else {
+            response.setHeader("Content-Length", String.valueOf(length));
+        }
+    }
+
+    /**
+     * Returns the local IP address.
+     * @return The local IP, or the loopback address (127.0.0.1) if not found.
+     */
+    public static String getLocalIpAddress() {
+        try {
+
+            // Try the simple way first.
+            InetAddress address = InetAddress.getLocalHost();
+            if (!address.isLoopbackAddress()) {
+                return address.getHostAddress();
+            }
+
+            // Iterate through all network interfaces, looking for a suitable IP.
+            Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces();
+            while (interfaces.hasMoreElements()) {
+                NetworkInterface iface = interfaces.nextElement();
+                Enumeration<InetAddress> addresses = iface.getInetAddresses();
+                while (addresses.hasMoreElements()) {
+                    InetAddress addr = addresses.nextElement();
+                    if (addr instanceof Inet4Address && !addr.isLoopbackAddress()) {
+                        return addr.getHostAddress();
+                    }
+                }
+            }
+
+        } catch (Throwable x) {
+            LOG.warn("Failed to resolve local IP address.", x);
+        }
+
+        return "127.0.0.1";
+    }
+
+    public static int randomInt(int min, int max) {
+        if (min >= max) {
+            return 0;
+        }
+        return min + RANDOM.nextInt(max - min);
+
+    }
+}
+\ No newline at end of file