com.example.CommonModelConfiguration.java Source code

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Here is the source code for com.example.CommonModelConfiguration.java

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/*
 * Copyright 2012-2015 the original author or authors.
 *
 * 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.
 */

package com.example;

import org.springframework.boot.autoconfigure.web.ServerProperties;
import org.springframework.context.annotation.Configuration;
import org.springframework.ui.ModelMap;
import org.springframework.web.context.request.WebRequest;
import org.springframework.web.context.request.WebRequestInterceptor;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

/**
 * @author Dave Syer
 *
 */
@Configuration
public class CommonModelConfiguration extends WebMvcConfigurerAdapter {

    private ServerProperties server;
    private CloudFoundryProperties cloud;

    public CommonModelConfiguration(ServerProperties server, CloudFoundryProperties cloud) {
        this.server = server;
        this.cloud = cloud;
    }

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addWebRequestInterceptor(interceptor());
    }

    private WebRequestInterceptor interceptor() {
        return new WebRequestInterceptor() {

            @Override
            public void preHandle(WebRequest request) throws Exception {
            }

            @Override
            public void postHandle(WebRequest request, ModelMap model) throws Exception {
                if (request.getAttribute("contextPath", WebRequest.SCOPE_REQUEST) == null) {
                    model.put("contextPath", server.getContextPath() == null ? "" : server.getContextPath());
                    model.put("api", cloud.getApi());
                } else {
                    // Slightly bizarre. Prevents error in template view when forwarding
                    // to a view with the user already present.
                    model.remove("user");
                }
            }

            @Override
            public void afterCompletion(WebRequest request, Exception ex) throws Exception {
            }
        };
    }
}