throws            ParserException    {        final String prefix = "file://localhost";        String resource;        URL url;        StringBuffer buffer;        URLConnection ret;        try        {            url = new URL (fixSpaces (string));            ret =  openConnection (url);        }        catch (MalformedURLException murle)        {   // try it as a file            try            {                File file = new File (string);                resource = file.getCanonicalPath ();                buffer = new StringBuffer (prefix.length ()                    + resource.length ());                buffer.append (prefix);                if (!resource.startsWith ("/"))                    buffer.append ("/");                buffer.append (resource);                url = new URL (fixSpaces (buffer.toString ()));                ret = openConnection (url);            }            catch (MalformedURLException murle2)            {                String msg = "Error in opening a connection to " + string;                ParserException ex = new ParserException (msg, murle2);                throw ex;            }            catch (IOException ioe)            {                String msg = "Error in opening a connection to " + string;                ParserException ex = new ParserException (msg, ioe);                throw ex;            }        }        return (ret);    }    /**     * Generate a HTTP cookie header value string from the cookie jar.     * <pre>     *   The syntax for the header is:     *     *    cookie          =       "Cookie:" cookie-version     *                            1*((";" | ",") cookie-value)     *    cookie-value    =       NAME "=" VALUE [";" path] [";" domain]     *    cookie-version  =       "$Version" "=" value     *    NAME            =       attr     *    VALUE           =       value     *    path            =       "$Path" "=" value     *    domain          =       "$Domain" "=" value     *     * </pre>     * @param connection The connection being accessed.     * @see <a href="http://www.ietf.org/rfc/rfc2109.txt">RFC 2109</a>     * @see <a href="http://www.ietf.org/rfc/rfc2396.txt">RFC 2396</a>     */    public void addCookies (URLConnection connection)    {        Vector list;        URL url;        String host;        String path;        String domain;        if (null != mCookieJar)        {            list = null;            // get the site from the URL            url = connection.getURL ();            host = url.getHost ();            path = url.getPath ();            if (0 == path.length ())                path = "/";            if (null != host)            {   // http://www.objectsdevelopment.com/portal/modules/freecontent/content/javawebserver.html                list = addCookies ((Vector)mCookieJar.get (host), path, list);                domain = getDomain (host);                if (null != domain)                    list = addCookies ((Vector)mCookieJar.get (domain),                        path, list);                else                    // maybe it is the domain we're accessing                    list = addCookies ((Vector)mCookieJar.get ("." + host),                        path, list);            }            if (null != list)                connection.setRequestProperty ("Cookie",                    generateCookieProperty (list));        }    }    /**     * Add qualified cookies from cookies into list.     * @param cookies The list of cookies to check (may be null).     * @param path The path being accessed.     * @param list The list of qualified cookies.     * @return The list of qualified cookies.     */    protected Vector addCookies (Vector cookies, String path, Vector list)    {        Cookie cookie;        Date expires;        Date now;        if (null != cookies)        {            now = new Date ();            for (int i = 0; i < cookies.size (); i++)            {                cookie = (Cookie)cookies.elementAt (i);                expires = cookie.getExpiryDate ();                if ((null != expires) && expires.before (now))                {                    cookies.remove (i);                    i--; // dick with the loop variable                }                else                    if (path.startsWith (cookie.getPath ()))                    {                        if (null == list)                            list = new Vector ();                        list.addElement (cookie);                    }            }        }                return (list);    }    /**     * Get the domain from a host.     * @param host The supposed host name.     * @return The domain (with the leading dot),     * or null if the domain cannot be determined.     */    protected String getDomain (String host)    {        StringTokenizer tokenizer;        int count;        String server;        int length;        boolean ok;        char c;        String ret;                ret = null;                tokenizer = new StringTokenizer (host, ".");        count = tokenizer.countTokens ();        if (3 <= count)        {            // have at least two dots,            // check if we were handed an IP address by mistake            length = host.length ();            ok = false;            for (int i = 0; i < length && !ok; i++)            {                c = host.charAt (i);                if (!(Character.isDigit (c) || (c == '.')))                    ok = true;            }            if (ok)            {                // so take everything after the first token                server = tokenizer.nextToken ();                length = server.length ();                ret = host.substring (length);            }        }        return (ret);    }    /**     * Creates the cookie request property value from the list of     * valid cookies for the domain.     * @param cookies The list of valid cookies to be encoded in the request.     * @return A string suitable for inclusion as the value of     * the "Cookie:" request property.     */    protected String generateCookieProperty (Vector cookies)    {        int version;        Cookie cookie;        StringBuffer buffer;        String ret;                ret = null;        buffer = new StringBuffer ();        version = 0;        for (int i = 0; i < cookies.size (); i++)            version = Math.max (version,                ((Cookie)cookies.elementAt (i)).getVersion ());        if (0 != version)        {            buffer.append ("$Version=\"");            buffer.append (version);            buffer.append ("\"");        }        for (int i = 0; i < cookies.size (); i++)        {            cookie = (Cookie)cookies.elementAt (i);            if (0 != buffer.length ())                buffer.append ("; ");            buffer.append (cookie.getName ());            buffer.append (cookie.getName ().equals ("") ? "" : "=");            if (0 != version)                buffer.append ("\"");            buffer.append (cookie.getValue ());            if (0 != version)                buffer.append ("\"");            if (0 != version)            {                if ((null != cookie.getPath ())                    && (0 != cookie.getPath ().length ()))                {                    buffer.append ("; $Path=\"");                    buffer.append (cookie.getPath ());                    buffer.append ("\"");                }                if ((null != cookie.getDomain ())                    && (0 != cookie.getDomain ().length ()))                {                    buffer.append ("; $Domain=\"");                    buffer.append (cookie.getDomain ());                    buffer.append ("\"");                }            }        }        if (0 != buffer.length ())            ret = buffer.toString ();        return (ret);    }        /**     * Check for cookie and parse into cookie jar.     * @param connection The connection to extract cookie information from.     */    public void parseCookies (URLConnection connection)    {        String string;        Vector cookies;        StringTokenizer tokenizer;        String token;        int index;        String name;        String key;        String value;        Cookie cookie;                string = connection.getHeaderField ("Set-Cookie");        if (null != string)        {//            set-cookie      =       "Set-Cookie:" cookies//            cookies         =       1#cookie//            cookie          =       NAME "=" VALUE *(";" cookie-av)//            NAME            =       attr//            VALUE           =       value//            cookie-av       =       "Comment" "=" value//                            |       "Domain" "=" value//                            |       "Max-Age" "=" value//                            |       "Path" "=" value//                            |       "Secure"//                            |       "Version" "=" 1*DIGIT            cookies = new Vector ();            tokenizer = new StringTokenizer (string, ";,", true);            cookie = null;            while (tokenizer.hasMoreTokens ())            {                token = tokenizer.nextToken ().trim ();                if (token.equals (";"))                    continue;                else if (token.equals (","))                {                    cookie = null;                    continue;                }                                    index = token.indexOf ('=');                if (-1 == index)                {                    if (null == cookie)                    {   // an unnamed cookie                        name = "";                        value = token;                        key = name;                    }                    else                    {                        name = token;                        value = null;                        key = name.toLowerCase ();                    }                }                else                {                    name = token.substring (0, index);                    value = token.substring (index + 1);                    key = name.toLowerCase ();                }                if (null == cookie)                {                    try                    {                        cookie = new Cookie (name, value);                        cookies.addElement (cookie);                    }                    catch (IllegalArgumentException iae)                    {                        // should print a warning                        // for now just bail                        break;                    }                }                else                {                    if (key.equals ("expires")) // Wdy, DD-Mon-YY HH:MM:SS GMT                    {                        String comma = tokenizer.nextToken ();                        String rest = tokenizer.nextToken ();                        try                        {                            Date date = mFormat.parse (value + comma + rest);                            cookie.setExpiryDate (date);                        }                        catch (ParseException pe)                        {                            // ok now what                            cookie.setExpiryDate (null);                        }                    }                    else                        if (key.equals ("domain"))                            cookie.setDomain (value);                        else                            if (key.equals ("path"))                                cookie.setPath (value);                            else                                if (key.equals ("secure"))                                    cookie.setSecure (true);                                else                                    if (key.equals ("comment"))                                        cookie.setComment (value);                                    else                                        if (key.equals ("version"))                                            cookie.setVersion (                                                Integer.parseInt (value));                                        else                                            if (key.equals ("max-age"))                                            {                                                Date date = new Date ();                                                long then = date.getTime ()                                                + Integer.parseInt (value)                                                * 1000;                                                date.setTime (then);                                                cookie.setExpiryDate (date);                                            }                                            else                                                // error,? unknown attribute,                                                // maybe just another cookie                                                // not separated by a comma                                                try                                                {                                                    cookie = new Cookie (name,                                                        value);                                                    cookies.addElement (cookie);                                                }                                                catch (IllegalArgumentException iae)                                                {                                                    // should print a warning                                                    // for now just bail                                                    break;                                                }                }           }           if (0 != cookies.size ())               saveCookies (cookies, connection);        }    }    /**     * Save the cookies received in the response header.     * @param list The list of cookies extracted from the response header.     * @param connection The connection (used when a cookie has no domain).     */    protected void saveCookies (Vector list, URLConnection connection)    {        Cookie cookie;        String domain;        for (int i = 0; i < list.size (); i++)        {            cookie = (Cookie)list.elementAt (i);            domain = cookie.getDomain ();            if (null == domain)                domain = connection.getURL ().getHost ();            setCookie (cookie, domain);        }    }}