Java tutorial
/** * The MIT License (MIT) * * Copyright (c) 2014 Antonio Toro (antorof.dev@gmail.com) * * 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.antorofdev.util; import android.util.Log; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.NameValuePair; import org.apache.http.client.HttpClient; import org.apache.http.client.entity.UrlEncodedFormEntity; import org.apache.http.client.methods.HttpGet; import org.apache.http.client.methods.HttpPost; import org.apache.http.client.utils.URLEncodedUtils; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.params.BasicHttpParams; import org.apache.http.params.HttpConnectionParams; import org.apache.http.params.HttpParams; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.util.ArrayList; /** * Class to help performing http petitions to a server. * * Includes methods to perform http GET and POST petitions and a function to convert an * {@link org.apache.http.HttpResponse} to <tt>String</tt>. */ public class Http { /** * Performs http POST petition to server. * * @param url URL to perform POST petition. * @param parameters Parameters to include in petition. * * @return Response from the server. * @throws IOException If the <tt>parameters</tt> have errors, connection timmed out, * socket timmed out or other error related with the connection occurs. */ public static HttpResponse post(String url, ArrayList<NameValuePair> parameters) throws IOException { HttpParams httpParameters = new BasicHttpParams(); int timeoutConnection = 10000; HttpConnectionParams.setConnectionTimeout(httpParameters, timeoutConnection); int timeoutSocket = 10000; HttpConnectionParams.setSoTimeout(httpParameters, timeoutSocket); HttpClient httpclient = new DefaultHttpClient(httpParameters); HttpPost httppost = new HttpPost(url); if (parameters != null) httppost.setEntity(new UrlEncodedFormEntity(parameters)); HttpResponse response = httpclient.execute(httppost); return response; } /** * Performs http POST petition to server. * * @param url URL to perform POST petition. * * @return Response from the server. * @throws IOException If the connection timmed out, socket timmed out or other error * related with the connection occurs. */ public static HttpResponse post(String url) throws IOException { return post(url, null); } /** * Performs http GET petition to server. * * @param url URL to perform GET petition. * @param parameters Parameters to include in petition. * * @return Response from the server. * @throws IOException If the <tt>parameters</tt> have errors, connection timmed out, * socket timmed out or other error related with the connection occurs. */ public static HttpResponse get(String url, ArrayList<NameValuePair> parameters) throws IOException { HttpParams httpParameters = new BasicHttpParams(); int timeoutConnection = 10000; HttpConnectionParams.setConnectionTimeout(httpParameters, timeoutConnection); int timeoutSocket = 10000; HttpConnectionParams.setSoTimeout(httpParameters, timeoutSocket); HttpClient httpclient = new DefaultHttpClient(httpParameters); if (parameters != null) { String paramString = URLEncodedUtils.format(parameters, "utf-8"); url += paramString; } HttpGet httpget = new HttpGet(url); HttpResponse response = httpclient.execute(httpget); return response; } /** * Performs http GET petition to server. * * @param url URL to perform POST petition. * * @return Response from the server. * @throws IOException If the connection timmed out, socket timmed out or other error * related with the connection occurs. */ public static HttpResponse get(String url) throws IOException { return get(url, null); } /** * Converts {@link org.apache.http.HttpResponse} to <tt>String</tt>. * Converting a response to a string is useful, e.g. if you want to extract a Json. * * @param response Response to convert to <tt>String</tt>. * @param verbose Show progress and data in <tt>Log</tt> * * @return Response converted to <tt>String</tt>. */ public static String responseToString(HttpResponse response, boolean verbose) { HttpEntity entity = response.getEntity(); String result = null; try { InputStream inputStream = entity.getContent(); BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream, "iso-8859-1"), 8); StringBuilder sb = new StringBuilder(); String line; while ((line = reader.readLine()) != null) { sb.append(line + "\n"); if (verbose) Log.v("readLine", "" + line); } inputStream.close(); result = sb.toString(); if (verbose) Log.v("responseToString", result); } catch (Exception e) { if (verbose) Log.e("responseToString", "failed to convert response"); e.printStackTrace(); } return result; } /** * Converts {@link org.apache.http.HttpResponse} to <tt>String</tt>. * Converting a response to a string is useful, e.g. if you want to extract a Json. * * @param response Response to convert to <tt>String</tt>. * * @return Response converted to <tt>String</tt> */ public static String responseToString(HttpResponse response) { return responseToString(response, false); } }