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Diffstat (limited to 'plugin/icedteanp/java/sun/applet/PluginProxySelector.java')
-rw-r--r-- | plugin/icedteanp/java/sun/applet/PluginProxySelector.java | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/plugin/icedteanp/java/sun/applet/PluginProxySelector.java b/plugin/icedteanp/java/sun/applet/PluginProxySelector.java new file mode 100644 index 0000000..dff8ded --- /dev/null +++ b/plugin/icedteanp/java/sun/applet/PluginProxySelector.java @@ -0,0 +1,195 @@ +/* PluginProxySelector -- proxy selector for all connections from applets and the plugin + Copyright (C) 2009 Red Hat + +This file is part of IcedTea. + +IcedTea 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 2, or (at your option) +any later version. + +IcedTea 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 IcedTea; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package sun.applet; + +import java.io.IOException; +import java.net.InetAddress; +import java.net.InetSocketAddress; +import java.net.Proxy; +import java.net.ProxySelector; +import java.net.SocketAddress; +import java.net.URI; +import java.util.Date; +import java.util.ArrayList; +import java.util.HashMap; +import java.util.List; + +/** + * Proxy selector implementation for plugin network functions. + * + * This class fetches proxy information from the web browser and + * uses that information in the context of all network connection + * (plugin specific and applet connections) as applicable + * + */ + +public class PluginProxySelector extends ProxySelector { + + private TimedHashMap<String, Proxy> proxyCache = new TimedHashMap<String, Proxy>(); + + + @Override + public void connectFailed(URI uri, SocketAddress sa, IOException ioe) { + // If the connection fails, there is little we can do here. Just print the exception + ioe.printStackTrace(); + } + + /** + * Selects the appropriate proxy (or DIRECT connection method) for the given URI + * + * @param uri The URI being accessed + * @return A list of Proxy objects that are usable for this URI + */ + @Override + public List<Proxy> select(URI uri) { + + List<Proxy> proxyList = new ArrayList<Proxy>(); + + // check cache first + Proxy cachedProxy = checkCache(uri); + if (cachedProxy != null) { + proxyList.add(cachedProxy); + return proxyList; + } + + // Nothing usable in cache. Fetch info from browser + Proxy proxy = Proxy.NO_PROXY; + Object o = PluginAppletViewer.requestPluginProxyInfo(uri); + + // If the browser returned anything, try to parse it. If anything in the try block fails, the fallback is direct connection + try { + if (o != null) { + PluginDebug.debug("Proxy URI = " + o); + URI proxyURI = (URI) o; + + // If origin uri is http/ftp, we're good. If origin uri is not that, the proxy _must_ be socks, else we fallback to direct + if (uri.getScheme().startsWith("http") || uri.getScheme().equals("ftp") || proxyURI.getScheme().startsWith("socks")) { + + Proxy.Type type = proxyURI.getScheme().equals("http") ? Proxy.Type.HTTP : Proxy.Type.SOCKS; + InetSocketAddress socketAddr = new InetSocketAddress(proxyURI.getHost(), proxyURI.getPort()); + + proxy = new Proxy(type, socketAddr); + + String uriKey = uri.getScheme() + "://" + uri.getHost(); + proxyCache.put(uriKey, proxy); + } else { + PluginDebug.debug("Proxy " + proxyURI + " cannot be used for " + uri + ". Falling back to DIRECT"); + } + } + } catch (Exception e) { + e.printStackTrace(); + } + + proxyList.add(proxy); + + PluginDebug.debug("Proxy for " + uri.toString() + " is " + proxy); + + return proxyList; + } + + /** + * Checks to see if proxy information is already cached. + * + * @param uri The URI to check + * @return The cached Proxy. null if there is no suitable cached proxy. + */ + private Proxy checkCache(URI uri) { + + String uriKey = uri.getScheme() + "://" + uri.getHost(); + if (proxyCache.get(uriKey) != null) { + return proxyCache.get(uriKey); + } + + return null; + } + + /** + * Simple utility class that extends HashMap by adding an expiry to the entries. + * + * This map stores entries, and returns them only if the entries were last accessed within time t=10 seconds + * + * @param <K> The key type + * @param <V> The Object type + */ + + private class TimedHashMap<K,V> extends HashMap<K,V> { + + HashMap<K, Long> timeStamps = new HashMap<K, Long>(); + Long expiry = 10000L; + + /** + * Store the item in the map and associate a timestamp with it + * + * @param key The key + * @param value The value to store + */ + public V put(K key, V value) { + timeStamps.put(key, new Date().getTime()); + return super.put(key, value); + } + + /** + * Return cached item if it has not already expired. + * + * Before returning, this method also resets the "last accessed" + * time for this entry, so it is good for another 10 seconds + * + * @param key The key + */ + public V get(Object key) { + + Long now = new Date().getTime(); + + if (super.containsKey(key)) { + Long age = now - timeStamps.get(key); + + // Item exists. If it has not expired, renew its access time and return it + if (age <= expiry) { + PluginDebug.debug("Returning proxy " + super.get(key) + " from cache for " + key); + timeStamps.put((K) key, (new Date()).getTime()); + return super.get(key); + } else { + PluginDebug.debug("Proxy cache for " + key + " has expired (age=" + age/1000.0 + " seconds)"); + } + } + + return null; + } + } + +} |