Java tutorial
/* * The MIT License * Copyright (c) 2010 Peter Ma * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.tedx.webservices; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.util.zip.GZIPInputStream; import org.apache.http.Header; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.client.methods.HttpPost; import org.apache.http.entity.StringEntity; import org.apache.http.impl.client.DefaultHttpClient; import org.json.JSONArray; import org.json.JSONObject; import android.util.Log; public class WebServices { private static final String TAG = "HttpClient"; public static JSONArray SendHttpPostArray(String URL, JSONObject jsonObjSend) { try { DefaultHttpClient httpclient = new DefaultHttpClient(); HttpPost httpPostRequest = new HttpPost(URL); StringEntity se; se = new StringEntity(jsonObjSend.toString()); // Set HTTP parameters httpPostRequest.setEntity(se); httpPostRequest.setHeader("Accept", "application/json"); httpPostRequest.setHeader("Content-type", "application/json"); //httpPostRequest.setHeader("Accept-Encoding", "gzip"); // only set this parameter if you would like to use gzip compression long t = System.currentTimeMillis(); HttpResponse response = (HttpResponse) httpclient.execute(httpPostRequest); Log.i(TAG, "HTTPResponse received in [" + (System.currentTimeMillis() - t) + "ms]"); // Get hold of the response entity (-> the data): HttpEntity entity = response.getEntity(); if (entity != null) { // Read the content stream InputStream instream = entity.getContent(); Header contentEncoding = response.getFirstHeader("Content-Encoding"); if (contentEncoding != null && contentEncoding.getValue().equalsIgnoreCase("gzip")) { instream = new GZIPInputStream(instream); } // convert content stream to a String String resultString = convertStreamToString(instream); instream.close(); // Transform the String into a JSONObject JSONArray jsonObjRecv = new JSONArray(resultString); // Raw DEBUG output of our received JSON object: Log.i(TAG, "<jsonobject>\n" + jsonObjRecv.toString() + "\n</jsonobject>"); return jsonObjRecv; } } catch (Exception e) { // More about HTTP exception handling in another tutorial. // For now we just print the stack trace. e.printStackTrace(); } return null; } public static JSONObject SendHttpPost(String URL, JSONObject jsonObjSend) { try { DefaultHttpClient httpclient = new DefaultHttpClient(); HttpPost httpPostRequest = new HttpPost(URL); StringEntity se; se = new StringEntity(jsonObjSend.toString()); // Set HTTP parameters httpPostRequest.setEntity(se); httpPostRequest.setHeader("Accept", "application/json"); httpPostRequest.setHeader("Content-type", "application/json"); //httpPostRequest.setHeader("Accept-Encoding", "gzip"); // only set this parameter if you would like to use gzip compression long t = System.currentTimeMillis(); HttpResponse response = (HttpResponse) httpclient.execute(httpPostRequest); Log.i(TAG, "HTTPResponse received in [" + (System.currentTimeMillis() - t) + "ms]"); // Get hold of the response entity (-> the data): HttpEntity entity = response.getEntity(); if (entity != null) { // Read the content stream InputStream instream = entity.getContent(); Header contentEncoding = response.getFirstHeader("Content-Encoding"); if (contentEncoding != null && contentEncoding.getValue().equalsIgnoreCase("gzip")) { instream = new GZIPInputStream(instream); } // convert content stream to a String String resultString = convertStreamToString(instream); instream.close(); // remove wrapping "[" and "]" if (resultString.substring(0, 1).contains("[")) resultString = resultString.substring(1, resultString.length() - 1); // Transform the String into a JSONObject JSONObject jsonObjRecv = new JSONObject(resultString); // Raw DEBUG output of our received JSON object: Log.i(TAG, "<jsonobject>\n" + jsonObjRecv.toString() + "\n</jsonobject>"); return jsonObjRecv; } } catch (Exception e) { // More about HTTP exception handling in another tutorial. // For now we just print the stack trace. e.printStackTrace(); } return null; } private static String convertStreamToString(InputStream is) { /* * To convert the InputStream to String we use the BufferedReader.readLine() * method. We iterate until the BufferedReader return null which means * there's no more data to read. Each line will appended to a StringBuilder * and returned as String. * * (c) public domain: http://senior.ceng.metu.edu.tr/2009/praeda/2009/01/11/a-simple-restful-client-at-android/ */ BufferedReader reader = new BufferedReader(new InputStreamReader(is)); 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(); } }