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


  /**
   * @tests java.net.ProxySelector#setDefault(ProxySelector)}
   */
  public void test_setDefaultLjava_net_ProxySelector_Security() {
    ProxySelector originalSelector = ProxySelector.getDefault();
    SecurityManager originalSecurityManager = System.getSecurityManager();
    try {
      System.setSecurityManager(new MockSecurityManager());
    } catch (SecurityException e) {
      System.err.println("No setSecurityManager permission.");

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            // IOException will be thrown in the case of failure
            connection = 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 {
                        connection = getHTTPConnection(selectedProxy);
                        proxy = selectedProxy;
                        break; // connected
                    } catch (IOException e) {
                        // failed to connect, tell it to the selector
                        selector.connectFailed(uri, selectedProxy.address(), e);
                    }
                }
            }
        }
        if (connection == null) {

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                + Support_Configuration.ProxyServerTestHost
                + "/cgi-bin/test.pl");
        URL ftpUrl = new URL("ftp://" + Support_Configuration.FTPTestAddress
                + "/nettest.txt");
        URL[] urlList = { httpUrl, ftpUrl };
        ProxySelector originalSelector = ProxySelector.getDefault();
        ProxySelector.setDefault(new MockProxySelector());
        try {
            for (int i = 0; i < urlList.length; ++i) {
                try {
                    isSelectCalled = false;

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                + Support_Configuration.ProxyServerTestHost
                + "/cgi-bin/test.pl");
        URL ftpUrl = new URL("ftp://" + Support_Configuration.FTPTestAddress
                + "/nettest.txt");
        URL[] urlList = { httpUrl, ftpUrl };
        ProxySelector originalSelector = ProxySelector.getDefault();
        ProxySelector.setDefault(new MockProxySelector());
        try {
            for (int i = 0; i < urlList.length; ++i) {
                try {
                    isSelectCalled = false;

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                + Support_Configuration.ProxyServerTestHost
                + "/cgi-bin/test.pl");
        URL ftpUrl = new URL("ftp://" + Support_Configuration.FTPTestAddress
                + "/nettest.txt");
        URL[] urlList = { httpUrl, ftpUrl };
        ProxySelector originalSelector = ProxySelector.getDefault();
        ProxySelector.setDefault(new MockProxySelector());
        try {
            for (int i = 0; i < urlList.length; ++i) {
                try {
                    isSelectCalled = false;

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                + Support_Configuration.ProxyServerTestHost
                + "/cgi-bin/test.pl");
        URL ftpUrl = new URL("ftp://" + Support_Configuration.FTPTestAddress
                + "/nettest.txt");
        URL[] urlList = { httpUrl, ftpUrl };
        ProxySelector originalSelector = ProxySelector.getDefault();
        ProxySelector.setDefault(new MockProxySelector());
        try {
            for (int i = 0; i < urlList.length; ++i) {
                try {
                    isSelectCalled = false;

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                + Support_Configuration.ProxyServerTestHost
                + "/cgi-bin/test.pl");
        URL ftpUrl = new URL("ftp://" + Support_Configuration.FTPTestAddress
                + "/nettest.txt");
        URL[] urlList = { httpUrl, ftpUrl };
        ProxySelector originalSelector = ProxySelector.getDefault();
        ProxySelector.setDefault(new MockProxySelector());
        try {
            for (int i = 0; i < urlList.length; ++i) {
                try {
                    isSelectCalled = false;

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


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


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

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            assertThat(expectedProxyHost, is(httpRoute.getProxyHost().getHostName()));
        }
    }


    private void assertGlobalProxyHost(String expectedProxyHost) {
        ProxySelector proxySelector = ProxySelector.getDefault();
        Proxy globalProxy = null;
        if (proxySelector != null) {
            List<Proxy> globalProxies = proxySelector.select(URI.create("http://soapui.org/"));
            assertThat(globalProxies.size(), is(1));
            globalProxy = globalProxies.get(0);
        }


        if (expectedProxyHost == null) {

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    assertThat(content).contains("agent");
  }


  @Test
  public void shouldGetDirectProxySynthesis() throws URISyntaxException {
    ProxySelector proxySelector = mock(ProxySelector.class);
    when(proxySelector.select(any(URI.class))).thenReturn(Arrays.asList(Proxy.NO_PROXY));
    assertThat(HttpDownloader.BaseHttpDownloader.getProxySynthesis(new URI("http://an_url"), proxySelector)).isEqualTo("no proxy");
  }

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