Java tutorial
package edu.mit.scratch; /* * * +------+----------------+------+ * |######| [ScratchAPI] |######| * +------+----------------+------+ * * Copyright (c) 2016 ScratchAPI Developers * * 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. * * "ScratchAPI Developers" means anybody who contributed code to the * project. * */ import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.util.Iterator; import org.apache.http.client.CookieStore; import org.apache.http.client.config.CookieSpecs; import org.apache.http.client.config.RequestConfig; import org.apache.http.client.methods.CloseableHttpResponse; import org.apache.http.client.methods.HttpUriRequest; import org.apache.http.client.methods.RequestBuilder; import org.apache.http.impl.client.BasicCookieStore; import org.apache.http.impl.client.CloseableHttpClient; import org.apache.http.impl.client.HttpClients; import org.apache.http.impl.cookie.BasicClientCookie; import org.json.JSONObject; import edu.mit.scratch.exceptions.ScratchUserException; public class ScratchUserManager { private ScratchSession session = null; private int message_count = 0; public ScratchUserManager(final ScratchSession session) throws ScratchUserException { if (session != null) this.session = session; else throw new ScratchUserException(); } public void clearMessages() throws ScratchUserException { try { final RequestConfig globalConfig = RequestConfig.custom().setCookieSpec(CookieSpecs.DEFAULT).build(); final CookieStore cookieStore = new BasicCookieStore(); final BasicClientCookie lang = new BasicClientCookie("scratchlanguage", "en"); lang.setDomain(".scratch.mit.edu"); lang.setPath("/"); cookieStore.addCookie(lang); final CloseableHttpClient httpClient = HttpClients.custom().setDefaultRequestConfig(globalConfig) .setUserAgent(Scratch.USER_AGENT).setDefaultCookieStore(cookieStore).build(); final HttpUriRequest update = RequestBuilder.get() .setUri("https://scratch.mit.edu/messages/ajax/messages-clear/") .addHeader("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8") .addHeader("Referer", "https://scratch.mit.edu").addHeader("Origin", "https://scratch.mit.edu") .addHeader("Accept-Encoding", "gzip, deflate, sdch") .addHeader("Accept-Language", "en-US,en;q=0.8").addHeader("Content-Type", "application/json") .addHeader("X-Requested-With", "XMLHttpRequest") .addHeader("Cookie", "scratchsessionsid=" + this.session.getSessionID() + "; scratchcsrftoken=" + this.session.getCSRFToken()) .addHeader("X-CSRFToken", this.session.getCSRFToken()).build(); httpClient.execute(update); } catch (final Exception e) { throw new ScratchUserException(); } } public int getMessageCount() { try { this.update(); } catch (final ScratchUserException e) { e.printStackTrace(); } return this.message_count; } public ScratchUserManager update() throws ScratchUserException { try { final RequestConfig globalConfig = RequestConfig.custom().setCookieSpec(CookieSpecs.DEFAULT).build(); final CookieStore cookieStore = new BasicCookieStore(); final BasicClientCookie lang = new BasicClientCookie("scratchlanguage", "en"); final BasicClientCookie sessid = new BasicClientCookie("scratchsessionsid", this.session.getSessionID()); final BasicClientCookie token = new BasicClientCookie("scratchcsrftoken", this.session.getCSRFToken()); final BasicClientCookie debug = new BasicClientCookie("DEBUG", "true"); lang.setDomain(".scratch.mit.edu"); lang.setPath("/"); sessid.setDomain(".scratch.mit.edu"); sessid.setPath("/"); token.setDomain(".scratch.mit.edu"); token.setPath("/"); debug.setDomain(".scratch.mit.edu"); debug.setPath("/"); cookieStore.addCookie(lang); cookieStore.addCookie(sessid); cookieStore.addCookie(token); cookieStore.addCookie(debug); final CloseableHttpClient httpClient = HttpClients.custom().setDefaultRequestConfig(globalConfig) .setUserAgent(Scratch.USER_AGENT).setDefaultCookieStore(cookieStore).build(); CloseableHttpResponse resp; final HttpUriRequest update = RequestBuilder.get() .setUri("https://scratch.mit.edu/messages/ajax/get-message-count/") .addHeader("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8") .addHeader("Referer", "https://scratch.mit.edu").addHeader("Origin", "https://scratch.mit.edu") .addHeader("Accept-Encoding", "gzip, deflate, sdch") .addHeader("Accept-Language", "en-US,en;q=0.8").addHeader("Content-Type", "application/json") .addHeader("X-Requested-With", "XMLHttpRequest") .addHeader("Cookie", "scratchsessionsid=" + this.session.getSessionID() + "; scratchcsrftoken=" + this.session.getCSRFToken()) .addHeader("X-CSRFToken", this.session.getCSRFToken()).build(); try { resp = httpClient.execute(update); } catch (final IOException e) { e.printStackTrace(); throw new ScratchUserException(); } BufferedReader rd; try { rd = new BufferedReader(new InputStreamReader(resp.getEntity().getContent())); } catch (UnsupportedOperationException | IOException e) { e.printStackTrace(); throw new ScratchUserException(); } final StringBuffer result = new StringBuffer(); String line = ""; while ((line = rd.readLine()) != null) result.append(line); final JSONObject jsonOBJ = new JSONObject(result.toString().trim()); final Iterator<?> keys = jsonOBJ.keys(); while (keys.hasNext()) { final String key = "" + keys.next(); final Object o = jsonOBJ.get(key); final String val = "" + o; switch (key) { case "msg_count": this.message_count = Integer.parseInt(val); break; default: System.out.println("Missing reference:" + key); break; } } } catch (final Exception e) { e.printStackTrace(); throw new ScratchUserException(); } return this; } }