com.github.markusbernhardt.proxy.ProxySearch Maven / Gradle / Ivy
package com.github.markusbernhardt.proxy;
import java.awt.GraphicsEnvironment;
import java.net.ProxySelector;
import java.text.MessageFormat;
import java.util.ArrayList;
import java.util.List;
import com.github.markusbernhardt.proxy.search.browser.firefox.FirefoxProxySearchStrategy;
import com.github.markusbernhardt.proxy.search.browser.ie.IEProxySearchStrategy;
import com.github.markusbernhardt.proxy.search.desktop.DesktopProxySearchStrategy;
import com.github.markusbernhardt.proxy.search.desktop.gnome.GnomeDConfProxySearchStrategy;
import com.github.markusbernhardt.proxy.search.desktop.gnome.GnomeProxySearchStrategy;
import com.github.markusbernhardt.proxy.search.desktop.kde.KdeProxySearchStrategy;
import com.github.markusbernhardt.proxy.search.desktop.win.WinProxySearchStrategy;
import com.github.markusbernhardt.proxy.search.env.EnvProxySearchStrategy;
import com.github.markusbernhardt.proxy.search.java.JavaProxySearchStrategy;
import com.github.markusbernhardt.proxy.search.wpad.WpadProxySearchStrategy;
import com.github.markusbernhardt.proxy.selector.misc.BufferedProxySelector;
import com.github.markusbernhardt.proxy.selector.misc.BufferedProxySelector.CacheScope;
import com.github.markusbernhardt.proxy.selector.misc.ProxyListFallbackSelector;
import com.github.markusbernhardt.proxy.selector.pac.PacProxySelector;
import com.github.markusbernhardt.proxy.util.Logger;
import com.github.markusbernhardt.proxy.util.Logger.LogBackEnd;
import com.github.markusbernhardt.proxy.util.Logger.LogLevel;
import com.github.markusbernhardt.proxy.util.PlatformUtil;
import com.github.markusbernhardt.proxy.util.ProxyException;
/*****************************************************************************
* Main class to setup and initialize the proxy detection system.
* This class can be used to select a proxy discovery strategy.
* Implements the "Builder" pattern.
* Use addStrategy to add one or more search strategies.
* If you are done call the getProxySelector method.
* Then the strategies are asked one after the other for a ProxySelector until
* an valid selector is found.
*
* Invoke the static getDefaultProxySearch method to use a default
* search strategy.
*
*
* @author Markus Bernhardt, Copyright 2016
* @author Bernd Rosstauscher, Copyright 2009
****************************************************************************/
public class ProxySearch implements ProxySearchStrategy {
private static final int DEFAULT_PAC_CACHE_SIZE = 20;
private static final long DEFAULT_PAC_CACHE_TTL = 1000 * 60 * 10; // 10
// Minutes
private static final CacheScope DEFAULT_PAC_CACHE_SCOPE = CacheScope.CACHE_SCOPE_HOST;
private List strategies;
private int pacCacheSize;
private long pacCacheTTL;
private CacheScope pacCacheScope;
/*****************************************************************************
* Types of proxy detection supported by the builder.
****************************************************************************/
public enum Strategy {
/// Use the platform settings.
OS_DEFAULT,
/// Use WPAD resolution
WPAD,
/// Use the settings of the platforms default browser.
BROWSER,
/// Use Firefox settings
FIREFOX,
/// Use InternetExplorer settings
IE,
/// Use environment variables for proxy settings.
ENV_VAR,
/// Use windows default proxy settings.
WIN,
/// Use KDE desktop default proxy settings.
KDE,
/// Use KDE desktop default proxy settings.
GNOME,
/// Use Java Networking system properties
JAVA
}
/*************************************************************************
* Constructor
************************************************************************/
public ProxySearch() {
super();
this.strategies = new ArrayList();
this.pacCacheSize = DEFAULT_PAC_CACHE_SIZE;
this.pacCacheTTL = DEFAULT_PAC_CACHE_TTL;
this.pacCacheScope = DEFAULT_PAC_CACHE_SCOPE;
}
/*************************************************************************
* Sets up a ProxySearch that uses a default search strategy suitable for
* every platform.
*
* @return a ProxySearch initialized with default settings.
************************************************************************/
public static ProxySearch getDefaultProxySearch() {
ProxySearch s = new ProxySearch();
// Test if we are a server or a client.
boolean headless = GraphicsEnvironment.isHeadless();
if (headless) {
s.addStrategy(Strategy.JAVA);
s.addStrategy(Strategy.OS_DEFAULT);
s.addStrategy(Strategy.ENV_VAR);
} else {
s.addStrategy(Strategy.JAVA);
s.addStrategy(Strategy.BROWSER);
s.addStrategy(Strategy.OS_DEFAULT);
s.addStrategy(Strategy.ENV_VAR);
}
Logger.log(ProxySearch.class, LogLevel.TRACE, "Using default search priority: {}", s);
return s;
}
/*************************************************************************
* Adds an search strategy to the list of proxy searches strategies.
*
* @param strategy
* the search strategy to add.
************************************************************************/
public void addStrategy(Strategy strategy) {
switch (strategy) {
case OS_DEFAULT:
this.strategies.add(new DesktopProxySearchStrategy());
break;
case WPAD:
this.strategies.add(new WpadProxySearchStrategy());
break;
case BROWSER:
this.strategies.add(getDefaultBrowserStrategy());
break;
case FIREFOX:
this.strategies.add(new FirefoxProxySearchStrategy());
break;
case IE:
this.strategies.add(new IEProxySearchStrategy());
break;
case ENV_VAR:
this.strategies.add(new EnvProxySearchStrategy());
break;
case WIN:
this.strategies.add(new WinProxySearchStrategy());
break;
case KDE:
this.strategies.add(new KdeProxySearchStrategy());
break;
case GNOME:
this.strategies.add(new GnomeDConfProxySearchStrategy());
this.strategies.add(new GnomeProxySearchStrategy());
break;
case JAVA:
this.strategies.add(new JavaProxySearchStrategy());
break;
default:
throw new IllegalArgumentException("Unknown strategy code!");
}
}
/*************************************************************************
* Sets the cache size of the PAC proxy selector cache. This defines the
* number of URLs that are cached together with the PAC script result. This
* improves performance because for URLs that are in the cache the script is
* not executed again. You have to set this before you add any strategies
* that may create a PAC script proxy selector.
*
* @param size
* of the cache. Set it to 0 to disable caching.
* @param ttl
* is the time to live of the cache entries as amount of
* milliseconds.
* @param cacheScope
* the desired cache scope.
************************************************************************/
public void setPacCacheSettings(int size, long ttl, CacheScope cacheScope) {
this.pacCacheSize = size;
this.pacCacheTTL = ttl;
this.pacCacheScope = cacheScope;
}
/*************************************************************************
* Gets the search strategy for the platforms default browser.
*
* @return a ProxySearchStrategy, null if no supported browser was found.
************************************************************************/
private ProxySearchStrategy getDefaultBrowserStrategy() {
switch (PlatformUtil.getDefaultBrowser()) {
case IE:
return new IEProxySearchStrategy();
case FIREFOX:
return new FirefoxProxySearchStrategy();
}
return null;
}
/*************************************************************************
* Gets the proxy selector that will use the configured search order.
*
* @return a ProxySelector, null if none was found for the current builder
* configuration.
************************************************************************/
@Override
public ProxySelector getProxySelector() {
Logger.log(getClass(), LogLevel.TRACE, "Executing search strategies to find proxy selector");
for (ProxySearchStrategy strat : this.strategies) {
try {
ProxySelector selector = strat.getProxySelector();
if (selector != null) {
selector = installBufferingAndFallbackBehaviour(selector);
Logger.log(getClass(), LogLevel.INFO, "Proxy found for " + strat.getName());
return selector;
} else {
Logger.log(getClass(), LogLevel.INFO,
"No proxy found for " + strat.getName() + ". Trying next one.");
}
} catch (ProxyException e) {
Logger.log(getClass(), LogLevel.DEBUG, "Strategy {} failed trying next one.", e);
// Ignore and try next strategy.
}
}
return null;
}
/*************************************************************************
* Gets the printable name of the search strategy.
*
* @return the printable name of the search strategy
************************************************************************/
@Override
public String getName() {
return "default";
}
/*************************************************************************
* If it is PAC and we have caching enabled set it here.
*
* @param selector
* the proxy selector to wrap
* @return the wrapped proxy selector or the passed in selector if nothing
* is done.
************************************************************************/
private ProxySelector installBufferingAndFallbackBehaviour(ProxySelector selector) {
if (selector instanceof PacProxySelector) {
if (this.pacCacheSize > 0) {
selector = new BufferedProxySelector(this.pacCacheSize, this.pacCacheTTL, selector, pacCacheScope);
}
selector = new ProxyListFallbackSelector(selector);
}
return selector;
}
/*************************************************************************
* toString
*
* @see java.lang.Object#toString()
************************************************************************/
@Override
public String toString() {
StringBuilder sb = new StringBuilder("Proxy search: ");
for (ProxySearchStrategy strat : this.strategies) {
sb.append(strat);
sb.append(" ");
}
return sb.toString();
}
/*************************************************************************
* For testing only. Will print the logging & proxy information to the
* console.
*
* @param args
* the command line arguments.
************************************************************************/
public static void main(String[] args) {
ProxySearch ps = ProxySearch.getDefaultProxySearch();
Logger.setBackend(new LogBackEnd() {
public void log(Class clazz, LogLevel loglevel, String msg, Object... params) {
System.out.println(MessageFormat.format(msg, params));
}
});
ps.getProxySelector();
}
}