/*
* Copyright © 2015-2016 Cask Data, Inc.
*
* 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 co.cask.cdap.gateway.handlers;
import co.cask.cdap.common.conf.Constants;
import co.cask.cdap.config.Config;
import co.cask.cdap.config.ConfigNotFoundException;
import co.cask.cdap.config.ConsoleSettingsStore;
import co.cask.cdap.security.spi.authentication.SecurityRequestContext;
import co.cask.http.AbstractHttpHandler;
import co.cask.http.HttpResponder;
import com.google.common.base.Charsets;
import com.google.common.base.Objects;
import com.google.common.collect.ImmutableMap;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import com.google.gson.JsonSyntaxException;
import com.google.inject.Inject;
import org.jboss.netty.handler.codec.http.HttpRequest;
import org.jboss.netty.handler.codec.http.HttpResponseStatus;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.Map;
import javax.ws.rs.DELETE;
import javax.ws.rs.GET;
import javax.ws.rs.PUT;
import javax.ws.rs.Path;
/**
* Console Settings HTTP Handler.
*/
@Path(Constants.Gateway.API_VERSION_3 + "/configuration/user")
public class ConsoleSettingsHttpHandler extends AbstractHttpHandler {
private static final Logger LOG = LoggerFactory.getLogger(ConsoleSettingsHttpHandler.class);
private static final JsonParser JSON_PARSER = new JsonParser();
private static final String CONFIG_PROPERTY = "property";
private static final String ID = "id";
private final ConsoleSettingsStore store;
@Inject
public ConsoleSettingsHttpHandler(ConsoleSettingsStore store) {
this.store = store;
}
@Path("/")
@GET
public void get(HttpRequest request, HttpResponder responder) throws Exception {
String userId = Objects.firstNonNull(SecurityRequestContext.getUserId(), "");
Config userConfig;
try {
userConfig = store.get(userId);
} catch (ConfigNotFoundException e) {
Map<String, String> propMap = ImmutableMap.of(CONFIG_PROPERTY, "{}");
userConfig = new Config(userId, propMap);
}
JsonObject jsonObject = new JsonObject();
jsonObject.addProperty(ID, userConfig.getId());
//We store the serialized JSON string of the properties in ConfigStore and we return a JsonObject back
jsonObject.add(CONFIG_PROPERTY, JSON_PARSER.parse(userConfig.getProperties().get(CONFIG_PROPERTY)));
responder.sendJson(HttpResponseStatus.OK, jsonObject);
}
@Path("/")
@DELETE
public void delete(HttpRequest request, HttpResponder responder) throws Exception {
String userId = Objects.firstNonNull(SecurityRequestContext.getUserId(), "");
try {
store.delete(userId);
} catch (ConfigNotFoundException e) {
// no-op if configuration does not exist - possible if nothing was 'put'
}
responder.sendStatus(HttpResponseStatus.OK);
}
@Path("/")
@PUT
public void set(HttpRequest request, HttpResponder responder) throws Exception {
String data = request.getContent().toString(Charsets.UTF_8);
if (!isValidJSON(data)) {
responder.sendJson(HttpResponseStatus.BAD_REQUEST, "Invalid JSON in body");
return;
}
//Configuration Layout for UserSettings:
//Config ID : userId
//Config Properties : Map (Key = CONFIG_PROPERTY, Value = Serialized JSON string of properties)
//User Settings configurations are stored under empty NAMESPACE.
Map<String, String> propMap = ImmutableMap.of(CONFIG_PROPERTY, data);
String userId = Objects.firstNonNull(SecurityRequestContext.getUserId(), "");
Config userConfig = new Config(userId, propMap);
store.put(userConfig);
responder.sendStatus(HttpResponseStatus.OK);
}
private boolean isValidJSON(String json) {
try {
JSON_PARSER.parse(json);
} catch (JsonSyntaxException ex) {
return false;
}
return true;
}
}