return connection.getHeaderFieldDate(header, def);
    }

    @Override
    public String getHeaderFieldKey(final int index) {
        try {
            handshake();
        } catch (final IOException ex) {}
        return connection.getHeaderFieldKey(index);
    }

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

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

    @Override
    public String getHeaderFieldKey(final int index) {
        handshake();
        return this.connection.getHeaderFieldKey(index);
    }

    @Override
    public String getHeaderField(final int index) {
        handshake();
        return this.connection.getHeaderField(index);