com.github.achatain.catalog.filter.JsonResponseFilter.java Source code

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Here is the source code for com.github.achatain.catalog.filter.JsonResponseFilter.java

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/*
 * https://github.com/achatain/catalog
 *
 * Copyright (C) 2017 Antoine Chatain (achatain [at] outlook [dot] com)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.github.achatain.catalog.filter;

import com.google.common.net.HttpHeaders;
import com.google.common.net.MediaType;

import javax.inject.Singleton;
import javax.servlet.*;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@Singleton
public final class JsonResponseFilter implements Filter {

    @Override
    public void init(final FilterConfig filterConfig) throws ServletException {
        // no-op
    }

    @Override
    public void doFilter(final ServletRequest request, final ServletResponse response, final FilterChain chain)
            throws IOException, ServletException {
        final HttpServletResponse httpResp = (HttpServletResponse) response;
        httpResp.addHeader(HttpHeaders.CONTENT_TYPE, MediaType.JSON_UTF_8.toString());

        chain.doFilter(request, response);
    }

    @Override
    public void destroy() {
        // no-op
    }
}