return connection.getHeaderFieldInt(header, def);
    }

    @Override
    public long getHeaderFieldDate(final String header, final long def) {
        try {
            handshake();
        } catch (final IOException ex) {}
        return connection.getHeaderFieldDate(header, def);
    }

    @Override
    public String getHeaderFieldKey(final int index) {
        try {

        handshake();
        return this.connection.getHeaderFieldInt(header, def);
    }

    @Override
    public long getHeaderFieldDate(final String header, final long def) {
        handshake();
        return this.connection.getHeaderFieldDate(header, def);
    }

    @Override
    public String getHeaderFieldKey(final int index) {
        handshake();