Java tutorial
/** * Copyright (C) 2014-2015 SINTEF * * Brian Elvester <brian.elvesater@sintef.no> * * 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 net.modelbased.proasense.storage.registry; import net.modelbased.proasense.storage.model.JsonPrinter; import net.modelbased.proasense.storage.model.Sensor; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.StatusLine; import org.apache.http.client.HttpClient; import org.apache.http.client.methods.HttpPost; import org.apache.http.entity.StringEntity; import org.apache.http.impl.client.DefaultHttpClient; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.net.URI; import java.net.URISyntaxException; import java.nio.charset.Charset; public class RegisterSensorSSN { public static final String SENSOR_PATH = "/sensapp/registry/sensors"; public static final String COMPOSITE_PATH = "/sensapp/registry/composite/sensors"; public RegisterSensorSSN() { // } public static String postSensor(Sensor sensor) throws RequestErrorException { String content = JsonPrinter.sensorToJson(sensor); URI target; try { target = new URI(sensor.getUri().toString() + SENSOR_PATH); } catch (URISyntaxException e1) { e1.printStackTrace(); throw new RequestErrorException(e1.getMessage()); } HttpClient client = new DefaultHttpClient(); HttpPost request = new HttpPost(target); request.setHeader("Content-type", "application/json"); String response = null; try { StringEntity seContent = new StringEntity(content); seContent.setContentType("text/json"); request.setEntity(seContent); response = resolveResponse(client.execute(request)); } catch (Exception e) { throw new RequestErrorException(e.getMessage()); } return response; } private static String convertStreamToString(InputStream is) { BufferedReader reader = new BufferedReader(new InputStreamReader(is, Charset.forName("UTF-8"))); StringBuilder sb = new StringBuilder(); String line = null; try { while ((line = reader.readLine()) != null) { sb.append(line + "\n"); } } catch (IOException e) { e.printStackTrace(); } finally { try { is.close(); } catch (IOException e) { e.printStackTrace(); } } return sb.toString(); } private static String resolveResponse(HttpResponse response) throws RequestErrorException { StatusLine status = response.getStatusLine(); HttpEntity entity = response.getEntity(); String result = null; if (entity != null) { InputStream inputStream = null; try { inputStream = entity.getContent(); result = convertStreamToString(inputStream); } catch (IllegalStateException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } finally { if (inputStream != null) { try { inputStream.close(); } catch (IOException e) { e.printStackTrace(); } } } } if (status.getStatusCode() == 200) { return result; } else if (status.getStatusCode() == 409) { // Log.w(TAG, status.toString()); // Log.w(TAG, result); return result; } else { throw new RequestErrorException("Invalid response from server: " + result, new IOException(status.toString()), status.getStatusCode()); } } }