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package com.btr.proxy.selector.whitelist;
import java.io.IOException;
import java.net.Proxy;
import java.net.ProxySelector;
import java.net.SocketAddress;
import java.net.URI;
import java.util.List;
import com.btr.proxy.util.ProxyUtil;
import com.btr.proxy.util.UriFilter;
/*****************************************************************************
* Special purpose ProxySelector used as Facade on top of a normal ProxySelector.
* A wrapper that will first check the URI against a white list and if it matches
* it will return DIRECT else it will pass the URI to an delegate for inspection.
*
* @author Bernd Rosstauscher (proxyvole@rosstauscher.de) Copyright 2009
****************************************************************************/
public class ProxyBypassListSelector extends ProxySelector {
private ProxySelector delegate;
private List<UriFilter> whiteListFilter;
/*************************************************************************
* Constructor
* @param whiteListFilter a list of filters for whitelist URLs.
* @param proxySelector the proxy selector to use.
************************************************************************/
public ProxyBypassListSelector(List<UriFilter> whiteListFilter, ProxySelector proxySelector) {
super();
if (whiteListFilter == null) {
throw new NullPointerException("Whitelist must not be null.");
}
if (proxySelector == null) {
throw new NullPointerException("ProxySelector must not be null.");
}
this.delegate = proxySelector;
this.whiteListFilter = whiteListFilter;
}
/*************************************************************************
* Constructor
* @param whiteList a list of filters for whitelist URLs as comma/space separated string.
* @param proxySelector the proxy selector to use.
************************************************************************/
public ProxyBypassListSelector(String whiteList, ProxySelector proxySelector) {
this(new DefaultWhiteListParser().parseWhiteList(whiteList), proxySelector);
}
/*************************************************************************
* connectFailed
* @see java.net.ProxySelector#connectFailed(java.net.URI, java.net.SocketAddress, java.io.IOException)
************************************************************************/
@Override
public void connectFailed(URI uri, SocketAddress sa, IOException ioe) {
this.delegate.connectFailed(uri, sa, ioe);
}
/*************************************************************************
* select
* @see java.net.ProxySelector#select(java.net.URI)
************************************************************************/
@Override
public List<Proxy> select(URI uri) {
// If in white list, use DIRECT connection.
for (UriFilter filter : this.whiteListFilter) {
if (filter.accept(uri)) {
return ProxyUtil.noProxyList();
}
}
return this.delegate.select(uri);
}
}
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