org.smartplatforms.oauth2.LaunchOrchestrationEndpoint.java Source code

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Here is the source code for org.smartplatforms.oauth2.LaunchOrchestrationEndpoint.java

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/*
 * #%L
 * hspc-auth
 * %%
 * Copyright (C) 2014 - 2015 Healthcare Services Platform Consortium
 * %%
 * 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%
 */

package org.smartplatforms.oauth2;

import com.google.gson.Gson;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import com.google.gson.reflect.TypeToken;
import org.apache.commons.lang.StringUtils;
import org.hspconsortium.platform.authorization.launchcontext.LaunchContextHolder;
import org.hspconsortium.platform.security.LaunchContext;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContext;
import org.springframework.security.core.userdetails.User;
import org.springframework.security.oauth2.common.util.RandomValueStringGenerator;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

@Controller
public class LaunchOrchestrationEndpoint {

    @RequestMapping(value = "/Launch", method = RequestMethod.POST, consumes = "application/json", produces = "application/json")
    public void handleLaunchRequest(HttpServletRequest request, HttpServletResponse response,
            @RequestBody String jsonString) {
        Map<String, Object> jsonMap = new HashMap<String, Object>();
        try {

            HttpSession sessionObj = request.getSession();

            JsonObject json = new JsonParser().parse(jsonString).getAsJsonObject();
            JsonObject jsonParams = json.get("parameters").getAsJsonObject();

            JsonElement jsonLaunchId = jsonParams.get("launch_id");
            String launchId = null;
            if (jsonLaunchId != null) {
                launchId = jsonLaunchId.getAsString();
            }

            Map<String, Object> launchContextParams = buildLaunchContextParamsMap(jsonParams);

            LaunchContext launchContext = createLaunchContext(launchId, launchContextParams);
            LaunchContextHolder.addLaunchContext(launchContext);

            SecurityContext securityContext = (SecurityContext) sessionObj.getAttribute("SPRING_SECURITY_CONTEXT");
            if (securityContext != null) {
                Authentication authentication = securityContext.getAuthentication();
                User user = (User) authentication.getPrincipal();
                jsonMap.put("username", user.getUsername());
            } else { //TODO this shouldn't happen when we turn authentication back on
                jsonMap.put("username", "none");
            }

            //TODO: get actual values
            jsonMap.put("created_by", "hspc_platform");
            jsonMap.put("launch_id", launchContext.getLaunchId());
            jsonMap.put("created_at", new Date().toString());
            Map<String, Object> retMap = new Gson().fromJson(json.get("parameters"),
                    new TypeToken<HashMap<String, Object>>() {
                    }.getType());
            jsonMap.put("parameters", retMap);

        } catch (Exception ex) {
            throw new RuntimeException(ex);
        }

        response.setHeader("Content-Type", "application/json;charset=utf-8");
        try {
            response.getWriter().write(new Gson().toJson(jsonMap));
        } catch (IOException io_ex) {
            throw new RuntimeException(io_ex);
        }
    }

    private LaunchContext createLaunchContext(String launchId, Map<String, Object> launchContextParams) {
        LaunchContext launchContext = null;
        if (StringUtils.isNotBlank(launchId)) {
            launchContext = LaunchContextHolder.getLaunchContext(launchId);
        }
        if (launchContext == null) {
            launchContext = new LaunchContext();
            RandomValueStringGenerator randomValueStringGenerator = new RandomValueStringGenerator();
            launchId = randomValueStringGenerator.generate();
            launchContext.setLaunchId(launchId);
            launchContext.setLaunchContextParams(launchContextParams);
        }
        return launchContext;
    }

    private Map<String, Object> buildLaunchContextParamsMap(JsonObject jsonParams) {
        Map<String, Object> launchContextParams = new HashMap<>();
        for (Map.Entry entry : jsonParams.entrySet()) {
            if (!entry.getKey().equals("launch_id")) {
                launchContextParams.put((String) entry.getKey(), ((JsonElement) entry.getValue()).getAsString());
            }
        }
        return launchContextParams;
    }
}