package com.trilead.ssh2;

/**
 * A <code>HTTPProxyData</code> object is used to specify the needed connection data
 * to connect through a HTTP proxy.
 *
 * @see Connection#setProxyData(ProxyData)
 *
 * @author Christian Plattner, plattner@trilead.com
 * @version $Id: HTTPProxyData.java,v 1.1 2007/10/15 12:49:56 cplattne Exp $
 */

public class HTTPProxyData implements ProxyData {
    public final String proxyHost;
    public final int proxyPort;
    public final String proxyUser;
    public final String proxyPass;
    public final String[] requestHeaderLines;

    /**
     * Same as calling {@link #HTTPProxyData(String, int, String, String) HTTPProxyData(proxyHost, proxyPort, <code>null</code>, <code>null</code>)}
     *
     * @param proxyHost Proxy hostname.
     * @param proxyPort Proxy port.
     */
    public HTTPProxyData(String proxyHost, int proxyPort) {
        this(proxyHost, proxyPort, null, null);
    }

    /**
     * Same as calling {@link #HTTPProxyData(String, int, String, String, String[]) HTTPProxyData(proxyHost, proxyPort, <code>null</code>, <code>null</code>, <code>null</code>)}
     *
     * @param proxyHost Proxy hostname.
     * @param proxyPort Proxy port.
     * @param proxyUser Username for basic authentication (<code>null</code> if no authentication is needed).
     * @param proxyPass Password for basic authentication (<code>null</code> if no authentication is needed).
     */
    public HTTPProxyData(String proxyHost, int proxyPort, String proxyUser, String proxyPass) {
        this(proxyHost, proxyPort, proxyUser, proxyPass, null);
    }

    /**
     * Connection data for a HTTP proxy. It is possible to specify a username and password
     * if the proxy requires basic authentication. Also, additional request header lines can
     * be specified (e.g., "User-Agent: CERN-LineMode/2.15 libwww/2.17b3").
     * <p>
     * Please note: if you want to use basic authentication, then both <code>proxyUser</code>
     * and <code>proxyPass</code> must be non-null.
     * <p>
     * Here is an example:
     * <p>
     * <code>
     * new HTTPProxyData("192.168.1.1", "3128", "proxyuser", "secret", new String[] {"User-Agent: TrileadBasedClient/1.0", "X-My-Proxy-Option: something"});
     * </code>
     *
     * @param proxyHost Proxy hostname.
     * @param proxyPort Proxy port.
     * @param proxyUser Username for basic authentication (<code>null</code> if no authentication is needed).
     * @param proxyPass Password for basic authentication (<code>null</code> if no authentication is needed).
     * @param requestHeaderLines An array with additional request header lines (without end-of-line markers)
     *        that have to be sent to the server. May be <code>null</code>.
     */

    public HTTPProxyData(String proxyHost, int proxyPort, String proxyUser, String proxyPass,
                         String[] requestHeaderLines) {
        if (proxyHost == null)
            throw new IllegalArgumentException("proxyHost must be non-null");

        if (proxyPort < 0)
            throw new IllegalArgumentException("proxyPort must be non-negative");

        this.proxyHost = proxyHost;
        this.proxyPort = proxyPort;
        this.proxyUser = proxyUser;
        this.proxyPass = proxyPass;
        this.requestHeaderLines = requestHeaderLines;
    }
}