Package org.apache.shindig.gadgets.servlet

Source Code of org.apache.shindig.gadgets.servlet.JsonRpcGadgetContext

/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements.  See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership.  The ASF licenses this file
* to you 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.apache.shindig.gadgets.servlet;

import org.apache.shindig.common.uri.Uri;
import org.apache.shindig.gadgets.GadgetContext;
import org.apache.shindig.gadgets.RenderingContext;
import org.apache.shindig.gadgets.UserPrefs;

import com.google.common.collect.Maps;

import org.json.JSONException;
import org.json.JSONObject;

import java.util.Iterator;
import java.util.Locale;
import java.util.Map;

/**
* Extracts context from JSON input.
*/
public class JsonRpcGadgetContext extends GadgetContext {
    private final JSONObject context;
    private final JSONObject gadget;

    private final String container;
    private final Boolean debug;
    private final Boolean ignoreCache;
    private final Locale locale;
    private final Integer moduleId;
    private final RenderingContext renderingContext;
    private final Uri url;
    private final UserPrefs userPrefs;
    private final String view;
    private final String cookies;
    private final String hostDomain;

    /**
     * @param context Request global parameters.
     * @param gadget  Values for the gadget being rendered.
     * @throws JSONException If parameters can't be extracted or aren't correctly formed.
     */
    public JsonRpcGadgetContext(JSONObject context, JSONObject gadget) throws JSONException {
        this.context = context;
        this.gadget = gadget;

        url = getUrl(gadget);
        moduleId = getModuleId(gadget);
        userPrefs = getUserPrefs(gadget);
        locale = getLocale(context);
        view = context.optString("view");
        ignoreCache = context.optBoolean("ignoreCache");
        container = context.optString("container");
        debug = context.optBoolean("debug");
        renderingContext = RenderingContext.METADATA;
        hostDomain = context.optString("hostDomain");
        cookies = getCookies(context, gadget);
    }

    @Override
    public String getParameter(String name) {
        if (gadget.has(name)) {
            return gadget.optString(name);
        }
        return context.optString(name, null);
    }

    @Override
    public String getContainer() {
        if (container == null) {
            return super.getContainer();
        }
        return container;
    }

    @Override
    public boolean getDebug() {
        if (debug == null) {
            return super.getDebug();
        }
        return debug;
    }

    @Override
    public boolean getIgnoreCache() {
        if (ignoreCache == null) {
            return super.getIgnoreCache();
        }
        return ignoreCache;
    }

    @Override
    public Locale getLocale() {
        if (locale == null) {
            return super.getLocale();
        }
        return locale;
    }

    @Override
    public int getModuleId() {
        if (moduleId == null) {
            return super.getModuleId();
        }
        return moduleId;
    }

    @Override
    public RenderingContext getRenderingContext() {
        if (renderingContext == null) {
            return super.getRenderingContext();
        }
        return renderingContext;
    }

    @Override
    public Uri getUrl() {
        if (url == null) {
            return super.getUrl();
        }
        return url;
    }

    @Override
    public UserPrefs getUserPrefs() {
        if (userPrefs == null) {
            return super.getUserPrefs();
        }
        return userPrefs;
    }

    @Override
    public String getView() {
        if (view == null) {
            return super.getView();
        }
        return view;
    }

    /**
     * @param obj
     * @return The locale, if appropriate parameters are set, or null.
     */
    private static Locale getLocale(JSONObject obj) {
        String language = obj.optString("language");
        String country = obj.optString("country");
        if (language == null || country == null) {
            return null;
        }
        return new Locale(language, country);
    }

    /**
     * @param json
     * @return module id from the request, or null if not present
     * @throws JSONException
     */
    private static Integer getModuleId(JSONObject json) throws JSONException {
        if (json.has("moduleId")) {
            return Integer.valueOf(json.getInt("moduleId"));
        }
        return null;
    }

    /**
     * @param json
     * @return URL from the request, or null if not present
     * @throws JSONException
     */
    private static Uri getUrl(JSONObject json) throws JSONException {
        try {
            String url = json.getString("url");
            return Uri.parse(url);
        } catch (IllegalArgumentException e) {
            return null;
        }
    }

    /**
     * @param json
     * @return UserPrefs, if any are set for this request.
     * @throws JSONException
     */
    @SuppressWarnings("unchecked")
    private static UserPrefs getUserPrefs(JSONObject json) throws JSONException {
        JSONObject prefs = json.optJSONObject("prefs");
        if (prefs == null) {
            return null;
        }
        Map<String, String> p = Maps.newHashMap();
        Iterator i = prefs.keys();
        while (i.hasNext()) {
            String key = (String) i.next();
            p.put(key, prefs.getString(key));
        }
        return new UserPrefs(p);
    }


    @Override
    public String getCookies() {
        if (cookies == null) {
            return super.getCookies();
        }
        return cookies;
    }

    @Override
    public String getHostDomain() {
        return hostDomain;
    }

    /**
     *
     * @param context   gadget context params
     * @param gadget    gadget params
     * @return  if same domain returns the cookies
     * @throws JSONException
     */
    private static String getCookies(JSONObject context, JSONObject gadget) throws JSONException {
        String cookies = context.optString("cookies");
        String url = gadget.getString("url");
        String hostDomain = context.optString("hostDomain");
        if(url.contains(hostDomain)){
             return cookies;
        }
        return "";
    }
}
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