Examples of java.net.ProxySelector

java.net.ProxySelector
Selects the proxy server to use, if any, when connecting to the network resource referenced by a URL. A proxy selector is a concrete sub-class of this class and is registered by invoking the {@link java.net.ProxySelector#setDefault setDefault} method. Thecurrently registered proxy selector can be retrieved by calling {@link java.net.ProxySelector#getDefault getDefault} method.
When a proxy selector is registered, for instance, a subclass of URLConnection class should call the {@link #select select}method for each URL request so that the proxy selector can decide if a direct, or proxied connection should be used. The {@link #select select} method returns an iterator over a collection withthe preferred connection approach.
If a connection cannot be established to a proxy (PROXY or SOCKS) servers then the caller should call the proxy selector's {@link #connectFailed connectFailed} method to notify the proxyselector that the proxy server is unavailable.
@version 1.3, 03/08/09 @author Yingxian Wang @author Jean-Christophe Collet @since 1.5

            throw new WebServiceException("Illegal endpoint address: "+url,e);
        }
    }


    private Proxy chooseProxy() {
        ProxySelector sel =
            java.security.AccessController.doPrivileged(
                new java.security.PrivilegedAction<ProxySelector>() {
                    public ProxySelector run() {
                        return ProxySelector.getDefault();
                    }
                });


        if(sel==null)
            return Proxy.NO_PROXY;




        if(!sel.getClass().getName().equals("sun.net.spi.DefaultProxySelector"))
            // user-defined proxy. may return a different proxy for each invocation
            return null;


        Iterator<Proxy> it = sel.select(uri).iterator();
        if(it.hasNext())
            return it.next();


        return Proxy.NO_PROXY;
    }

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            throw new WebServiceException("Illegal endpoint address: "+url,e);
        }
    }


    private Proxy chooseProxy() {
        ProxySelector sel =
            java.security.AccessController.doPrivileged(
                new java.security.PrivilegedAction<ProxySelector>() {
                    public ProxySelector run() {
                        return ProxySelector.getDefault();
                    }
                });


        if(sel==null)
            return Proxy.NO_PROXY;




        if(!sel.getClass().getName().equals("sun.net.spi.DefaultProxySelector"))
            // user-defined proxy. may return a different proxy for each invocation
            return null;


        Iterator<Proxy> it = sel.select(uri).iterator();
        if(it.hasNext())
            return it.next();


        return Proxy.NO_PROXY;
    }

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        Proxy p = null;
        if (instProxy == null) { // no per connection proxy specified
            /**
             * Do we have to use a proxie?
             */
            ProxySelector sel = (ProxySelector)
                java.security.AccessController.doPrivileged(
                        new java.security.PrivilegedAction() {
                            public Object run() {
                                return ProxySelector.getDefault();
                            }
                            });
            if (sel != null) {
                URI uri = sun.net.www.ParseUtil.toURI(url);
                Iterator<Proxy> it = sel.select(uri).iterator();
                while (it.hasNext()) {
                    p = it.next();
                    if (p == null || p == Proxy.NO_PROXY ||
                        p.type() == Proxy.Type.SOCKS)
                        break;
                    if (p.type() != Proxy.Type.HTTP ||
                        !(p.address() instanceof InetSocketAddress)) {
                        sel.connectFailed(uri, p.address(), new IOException("Wrong proxy type"));
                        continue;
                    }
                    // OK, we have an http proxy
                    InetSocketAddress paddr = (InetSocketAddress) p.address();
                    try {
                        http = new HttpURLConnection(url, p);
                        if (connectTimeout >= 0)
                            http.setConnectTimeout(connectTimeout);
                        if (readTimeout >= 0)
                            http.setReadTimeout(readTimeout);
                        http.connect();
                        connected = true;
                        return;
                    } catch (IOException ioe) {
                        sel.connectFailed(uri, paddr, ioe);
                        http = null;
                    }
                }
            }
        } else { // per connection proxy specified

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            if (instProxy == null) { // no instance Proxy is set
                /**
                 * Do we have to use a proxy?
                 */
                ProxySelector sel = (ProxySelector)
                    java.security.AccessController.doPrivileged(
                             new java.security.PrivilegedAction() {
                                 public Object run() {
                                     return ProxySelector.getDefault();
                                 }
                             });
                Proxy p = null;
                if (sel != null) {
                    URI uri = sun.net.www.ParseUtil.toURI(url);
                    Iterator<Proxy> it = sel.select(uri).iterator();
                    while (it.hasNext()) {
                        p = it.next();
                        try {
                            if (!failedOnce) {
                                http = getNewHttpClient(url, p, connectTimeout);
                                http.setReadTimeout(readTimeout);
                            } else {
                                // make sure to construct new connection if first
                                // attempt failed
                                http = getNewHttpClient(url, p, connectTimeout, false);
                                http.setReadTimeout(readTimeout);
                            }
                            break;
                        } catch (IOException ioex) {
                            if (p != Proxy.NO_PROXY) {
                                sel.connectFailed(uri, p.address(), ioex);
                                if (!it.hasNext()) {
                                    // fallback to direct connection
                                    http = getNewHttpClient(url, null, connectTimeout, false);
                                    http.setReadTimeout(readTimeout);
                                    break;

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public class B6563259 {
    public static void main(String[] args) throws Exception {
        System.setProperty("http.proxyHost", "myproxy");
        System.setProperty("http.proxyPort", "8080");
        System.setProperty("http.nonProxyHosts", "host1.*");
        ProxySelector sel = ProxySelector.getDefault();
        java.util.List<Proxy> l = sel.select(new URI("http://HOST1.sun.com/"));
        if (l.get(0) != Proxy.NO_PROXY) {
            throw new RuntimeException("ProxySelector returned the wrong proxy");
        }
    }

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     * @return a list of proxy for the URI. Returns null if no proxy is
     *         available.
     */
    public static List<Proxy> getProxyList(URI uri) {
        // use system default selector to get proxy list
        ProxySelector selector = ProxySelector.getDefault();
        if (null == selector) {
            return null;
        }
        return selector.select(uri);
    }

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        }
        if (null == proxyList) {
            currentProxy = null;
            connectInternal();
        } else {
            ProxySelector selector = ProxySelector.getDefault();
            Iterator<Proxy> iter = proxyList.iterator();
            boolean connectOK = false;
            while (iter.hasNext() && !connectOK) {
                currentProxy = iter.next();
                try {
                    connectInternal();
                    connectOK = true;
                } catch (IOException ioe) {
                    // If connect failed, callback "connectFailed"
                    // should be invoked.
                    if (null != selector && Proxy.NO_PROXY != currentProxy) {
                        selector
                                .connectFailed(uri, currentProxy.address(), ioe);
                    }
                }
            }
            if (!connectOK) {

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            // IOException will be thrown in the case of failure
            socket = getHTTPConnection(proxy);
        } else {
            // Use system-wide ProxySelect to select proxy list,
            // then try to connect via elements in the proxy list.
            ProxySelector selector = ProxySelector.getDefault();
            List<Proxy> proxyList = selector.select(uri);
            if (proxyList != null) {
                for (Proxy selectedProxy : proxyList) {
                    if (selectedProxy.type() == Proxy.Type.DIRECT) {
                        // the same as NO_PROXY
                        continue;
                    }
                    try {
                        socket = getHTTPConnection(selectedProxy);
                        proxy = selectedProxy;
                        break; // connected
                    } catch (IOException e) {
                        // failed to connect, tell it to the selector
                        selector.connectFailed(uri, selectedProxy.address(), e);
                    }
                }
            }
        }
        if (socket == null) {

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                                      final HttpRequest request,
                                      final HttpContext context)
        throws HttpException {


        // the proxy selector can be 'unset', so we better deal with null here
        ProxySelector psel = this.proxySelector;
        if (psel == null) {
            psel = ProxySelector.getDefault();
        }
        if (psel == null) {
            return null;
        }


        URI targetURI = null;
        try {
            targetURI = new URI(target.toURI());
        } catch (final URISyntaxException usx) {
            throw new HttpException
                ("Cannot convert host to URI: " + target, usx);
        }
        final List<Proxy> proxies = psel.select(targetURI);


        final Proxy p = chooseProxy(proxies, target, request, context);


        HttpHost result = null;
        if (p.type() == Proxy.Type.HTTP) {

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                                      final HttpRequest request,
                                      final HttpContext context)
        throws HttpException {


        // the proxy selector can be 'unset', so we better deal with null here
        ProxySelector psel = this.proxySelector;
        if (psel == null) {
            psel = ProxySelector.getDefault();
        }
        if (psel == null) {
            return null;
        }


        URI targetURI = null;
        try {
            targetURI = new URI(target.toURI());
        } catch (final URISyntaxException usx) {
            throw new HttpException
                ("Cannot convert host to URI: " + target, usx);
        }
        final List<Proxy> proxies = psel.select(targetURI);


        final Proxy p = chooseProxy(proxies, target, request, context);


        HttpHost result = null;
        if (p.type() == Proxy.Type.HTTP) {

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