com.devicehive.application.filter.SwaggerFilter.java Source code

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Here is the source code for com.devicehive.application.filter.SwaggerFilter.java

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package com.devicehive.application.filter;

/*
 * #%L
 * DeviceHive Frontend Logic
 * %%
 * Copyright (C) 2016 DataArt
 * %%
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * #L%
 */

import com.devicehive.application.JerseyConfig;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.filter.OncePerRequestFilter;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.net.URL;

@WebFilter("/swagger")
public class SwaggerFilter extends OncePerRequestFilter {

    private static final Logger logger = LoggerFactory.getLogger(SwaggerFilter.class);

    @Override
    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response,
            FilterChain filterChain) throws ServletException, IOException {

        URL requestUrl = new URL(request.getRequestURL().toString());
        logger.debug("Swagger filter triggered by '{}: {}'. Request will be redirected to swagger page",
                request.getMethod(), requestUrl);

        String swaggerJsonUrl = String.format("%s://%s:%s%s%s/swagger.json", requestUrl.getProtocol(),
                requestUrl.getHost(),
                requestUrl.getPort() == -1 ? requestUrl.getDefaultPort() : requestUrl.getPort(),
                request.getContextPath(), JerseyConfig.REST_PATH);
        String url = request.getContextPath() + "/swagger.html?url=" + swaggerJsonUrl;

        logger.debug("Request is being redirected to '{}'", url);
        response.sendRedirect(url);
    }
}