org.exem.flamingo.web.configuration.ConfigurationController.java Source code

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Here is the source code for org.exem.flamingo.web.configuration.ConfigurationController.java

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/*
 * Copyright 2012-2016 the Flamingo Community.
 *
 * 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 org.exem.flamingo.web.configuration;

import com.google.gson.Gson;
import org.exem.flamingo.shared.util.JsonUtils;
import org.exem.flamingo.shared.util.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.util.MultiValueMap;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.*;

import static org.apache.commons.lang.StringUtils.isEmpty;
import static org.apache.commons.lang.StringUtils.splitPreserveAllTokens;

/**
 * ?  ?(<tt>config.properties</tt>)? JavaScript?   JSON  .
 *
 * @author Byoung Gon, Kim
 * @since 2.0
 */
@RestController
@RequestMapping("/config")
public class ConfigurationController implements InitializingBean {

    /**
     * SLF4J Logging
     */
    private Logger logger = LoggerFactory.getLogger(ConfigurationController.class);

    /**
     * JavaScript Variable Prefix
     */
    private final static String JS_PREFIX = "var config = ";

    /**
     * JavaScript End Postfix
     */
    private final static String JS_POSTFIX = ";";

    /**
     * JavaScript Content Type
     */
    private final static String CONTENT_TYPE = "application/x-javascript; charset=UTF-8";

    /**
     * Configuration JSON
     */
    private String configJson;

    @Autowired
    @Qualifier("config")
    private Properties config;

    @Autowired
    @Qualifier("app")
    private Properties app;

    /**
     *  ?? expose.   ? JavaScript?    ? .
     */
    @Override
    public void afterPropertiesSet() throws Exception {
        Map params = new HashMap();
        Set<Object> configKeys = config.keySet();
        for (Object key : configKeys) {
            String value = (String) config.get(key);
            //  ????  Key  ? .
            if (((String) key).equals("web.expose.keys")) {
                String keysToExport = config.getProperty("web.expose.keys");
                String[] keyToExport = splitPreserveAllTokens(keysToExport, ",");
                for (String string : keyToExport) {
                    if (!isEmpty(System.getProperty(string.trim()))) {
                        params.put(string.trim(), System.getProperty(string.trim()));
                    } else {
                        if (isEmpty(config.getProperty(string.trim()))) {
                            params.put(string.trim(), "");
                        } else {
                            params.put(string.trim(), config.getProperty(string.trim()).trim());
                        }
                    }
                }
            } else {
                // web.    Key  ? .
                if (((String) key).startsWith("web.")) {
                    String removed = StringUtils.replace(((String) key), "web.", "");
                    if (!isEmpty(System.getProperty(removed))) {
                        params.put(removed.trim(), System.getProperty(removed));
                    } else {
                        params.put(removed.trim(), value.trim());
                    }
                }
            }
        }

        Set<Object> appKeys = app.keySet();
        for (Object key : appKeys) {
            String value = (String) app.get(key);
            params.put(key, value.trim());
        }

        configJson = JsonUtils.format(params);
    }

    /**
     *  ??  ??   JavaScript .
     */
    @RequestMapping(value = "js", method = RequestMethod.GET)
    @ResponseStatus(HttpStatus.OK)
    public ResponseEntity<String> getJs(final HttpServletRequest request, final HttpServletResponse response,
            final Locale locale) throws IOException {
        Gson gson = new Gson();
        MultiValueMap headers = new HttpHeaders();
        headers.set("Content-Type", CONTENT_TYPE);

        Map configMap = gson.fromJson(configJson, Map.class);

        String configurationJson = JsonUtils.format(configMap);

        return new ResponseEntity(JS_PREFIX + configurationJson + JS_POSTFIX, headers, HttpStatus.OK);
    }
}