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The Bouncy Castle Java APIs for TLS and DTLS, including a provider for the JSSE.

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package org.bouncycastle.jsse.util;

import java.io.IOException;
import java.io.InputStream;
import java.net.Proxy;
import java.net.URL;
import java.net.URLConnection;

import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLSocketFactory;

public class URLConnectionUtil
{
    protected final SSLSocketFactory sslSocketFactory;

    public URLConnectionUtil()
    {
        this(null);
    }

    public URLConnectionUtil(SSLSocketFactory sslSocketFactory)
    {
        this.sslSocketFactory = sslSocketFactory;
    }

    public URLConnection openConnection(URL url) throws IOException
    {
        return configureConnection(url, url.openConnection());
    }

    public URLConnection openConnection(URL url, Proxy proxy) throws IOException
    {
        return configureConnection(url, url.openConnection(proxy));
    }

    /** @deprecated Use {@link #openStream(URL)} instead */
    public InputStream openInputStream(URL url) throws IOException
    {
        return openConnection(url).getInputStream();
    }

    public InputStream openStream(URL url) throws IOException
    {
        return openConnection(url).getInputStream();
    }

    protected URLConnection configureConnection(URL url, URLConnection connection)
    {
        if (!(connection instanceof HttpsURLConnection))
        {
            return connection;
        }

        HttpsURLConnection https = (HttpsURLConnection)connection;

        SSLSocketFactory delegate = this.sslSocketFactory;
        if (null == delegate)
        {
            delegate = https.getSSLSocketFactory();
        }

        https.setSSLSocketFactory(createSSLSocketFactory(delegate, url));

        return https;
    }

    protected SSLSocketFactory createSSLSocketFactory(SSLSocketFactory delegate, URL url)
    {
        return new SetHostSocketFactory(delegate, url);
    }
}