Application: gvSIG desktop

package org.gvsig.expressionevaluator.impl.function.programming;

import java.net.URL;

import java.security.KeyManagementException;

import java.security.NoSuchAlgorithmException;

import java.security.cert.CertificateException;

import java.security.cert.X509Certificate;

import javax.net.ssl.HttpsURLConnection;

import javax.net.ssl.SSLContext;

import javax.net.ssl.SSLSocketFactory;

import javax.net.ssl.TrustManager;

import javax.net.ssl.X509TrustManager;

import org.apache.commons.io.IOUtils;

import org.apache.commons.lang3.Range;

import static org.gvsig.expressionevaluator.ExpressionBuilder.FUNCTION_URLREAD;

import org.gvsig.expressionevaluator.Function;

import org.gvsig.expressionevaluator.Interpreter;

import org.gvsig.expressionevaluator.spi.AbstractFunction;

/**

 *

 * @author jjdelcerro

 */

public class UrlReadFunction extends AbstractFunction {

    public static class X509TrustAllManager implements X509TrustManager {

        private static SSLSocketFactory socketFactory = null;

        public static void setDefaultSSLSocketFactory() throws NoSuchAlgorithmException, KeyManagementException {

            if( socketFactory == null ) {

                X509TrustAllManager trustAll = new X509TrustAllManager();

                SSLContext sslContext = SSLContext.getInstance("TLS");

                sslContext.init(null, new TrustManager[] { trustAll },  new java.security.SecureRandom());

                socketFactory = sslContext.getSocketFactory();

            }

            if( HttpsURLConnection.getDefaultSSLSocketFactory()!=socketFactory ) {

                HttpsURLConnection.setDefaultSSLSocketFactory(socketFactory);

            }

        }

        @Override

        public void checkClientTrusted(X509Certificate[] xcs, String string) throws CertificateException {

        }

        @Override

        public void checkServerTrusted(X509Certificate[] xcs, String string) throws CertificateException {

        }

        @Override

        public X509Certificate[] getAcceptedIssuers() {

            return null;

        }

    }

    public UrlReadFunction() {

        super(Function.GROUP_PROGRAMMING,

            FUNCTION_URLREAD,

            Range.is(1),

            null,

            FUNCTION_URLREAD+"({{expression}})",

            null,

            "String",

            false

        );

        this.addAlias("URLREAD");

    }

    @Override

    public boolean allowConstantFolding() {

        return false;

    }

    @Override

    public Object call(Interpreter interpreter, Object[] args) throws Exception {

        URL url = getURL(args,0);

        X509TrustAllManager.setDefaultSSLSocketFactory();

        String s = IOUtils.toString(url);

        return s;

    }

}