Java tutorial
/* astyle --style=java --indent=spaces=4 */ /* * Copyright (C) 2015 www.phantombot.net * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package com.illusionaryone; import com.gmt2001.UncaughtExceptionHandler; import java.io.BufferedOutputStream; import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.InputStream; import java.io.InputStreamReader; import java.io.IOException; import java.io.OutputStream; import java.io.OutputStreamWriter; import java.io.Reader; import java.io.UnsupportedEncodingException; import java.io.Writer; import java.net.MalformedURLException; import java.net.SocketTimeoutException; import java.net.URL; import java.net.URLConnection; import java.net.URLEncoder; import java.nio.charset.Charset; import javax.net.ssl.HttpsURLConnection; import org.apache.commons.io.IOUtils; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; /* * Communicates with the Twitch Alerts v1 API server. Currently only * supports the GET donations method. * * @author illusionaryone */ public class TwitchAlertsAPIv1 { private static final TwitchAlertsAPIv1 instance = new TwitchAlertsAPIv1(); private static final String sAPIURL = "https://www.twitchalerts.com/api/v1.0"; private static final int iHTTPTimeout = 2 * 1000; private String sAccessToken = ""; private int iDonationPullLimit = 5; public static TwitchAlertsAPIv1 instance() { return instance; } private TwitchAlertsAPIv1() { Thread.setDefaultUncaughtExceptionHandler(com.gmt2001.UncaughtExceptionHandler.instance()); } /* * Reads data from a stream. */ private static String readAll(Reader rd) throws IOException { StringBuilder sb = new StringBuilder(); int cp; while ((cp = rd.read()) != -1) { sb.append((char) cp); } return sb.toString(); } /* * Populates additional information into a JSON object to be digested * as needed. */ private static void fillJSONObject(JSONObject jsonObject, boolean success, String type, String url, int responseCode, String exception, String exceptionMessage, String jsonContent) { jsonObject.put("_success", success); jsonObject.put("_type", type); jsonObject.put("_url", url); jsonObject.put("_http", responseCode); jsonObject.put("_exception", exception); jsonObject.put("_exceptionMessage", exceptionMessage); jsonObject.put("_content", jsonContent); } @SuppressWarnings("UseSpecificCatch") private static JSONObject readJsonFromUrl(String urlAddress) { JSONObject jsonResult = new JSONObject("{}"); InputStream inputStream = null; URL urlRaw; HttpsURLConnection urlConn; String jsonText = ""; try { urlRaw = new URL(urlAddress); urlConn = (HttpsURLConnection) urlRaw.openConnection(); urlConn.setDoInput(true); urlConn.setRequestMethod("GET"); urlConn.addRequestProperty("Content-Type", "application/json"); urlConn.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 " + "(KHTML, like Gecko) Chrome/44.0.2403.52 Safari/537.36 PhantomBotJ/2015"); urlConn.connect(); if (urlConn.getResponseCode() == 200) { inputStream = urlConn.getInputStream(); } else { inputStream = urlConn.getErrorStream(); } BufferedReader rd = new BufferedReader(new InputStreamReader(inputStream, Charset.forName("UTF-8"))); jsonText = readAll(rd); jsonResult = new JSONObject(jsonText); fillJSONObject(jsonResult, true, "GET", urlAddress, urlConn.getResponseCode(), "", "", jsonText); } catch (JSONException ex) { fillJSONObject(jsonResult, false, "GET", urlAddress, 0, "JSONException", ex.getMessage(), jsonText); com.gmt2001.Console.err.printStackTrace(ex); } catch (NullPointerException ex) { fillJSONObject(jsonResult, false, "GET", urlAddress, 0, "NullPointerException", ex.getMessage(), ""); com.gmt2001.Console.err.printStackTrace(ex); } catch (MalformedURLException ex) { fillJSONObject(jsonResult, false, "GET", urlAddress, 0, "MalformedURLException", ex.getMessage(), ""); com.gmt2001.Console.err.printStackTrace(ex); } catch (SocketTimeoutException ex) { fillJSONObject(jsonResult, false, "GET", urlAddress, 0, "SocketTimeoutException", ex.getMessage(), ""); com.gmt2001.Console.err.printStackTrace(ex); } catch (IOException ex) { fillJSONObject(jsonResult, false, "GET", urlAddress, 0, "IOException", ex.getMessage(), ""); com.gmt2001.Console.err.printStackTrace(ex); } catch (Exception ex) { fillJSONObject(jsonResult, false, "GET", urlAddress, 0, "Exception", ex.getMessage(), ""); com.gmt2001.Console.err.printStackTrace(ex); } finally { if (inputStream != null) try { inputStream.close(); } catch (IOException ex) { fillJSONObject(jsonResult, false, "GET", urlAddress, 0, "IOException", ex.getMessage(), ""); com.gmt2001.Console.err.printStackTrace(ex); } } return (jsonResult); } /* * Sets the Access Token to authenticate with TwitchAlerts API. * * @param sAccessToken */ public void SetAccessToken(String sAccessToken) { this.sAccessToken = sAccessToken; } /* * Sets a new limit to how many donation records to return. * * @param iDonationPullLimit */ public void SetDonationPullLimit(int iDonationPullLimit) { this.iDonationPullLimit = iDonationPullLimit; } /* * Pulls donation information. * * @return */ public JSONObject GetDonations() { return readJsonFromUrl( sAPIURL + "/donations?access_token=" + this.sAccessToken + "&limit=" + this.iDonationPullLimit); } }