Java tutorial
/* * Everychan Android (Meta Imageboard Client) * Copyright (C) 2014-2016 miku-nyan <https://github.com/miku-nyan> * * 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.nttec.everychan.chans.cirno; import java.io.ByteArrayOutputStream; import java.util.ArrayList; import java.util.Arrays; import java.util.List; import cz.msebera.android.httpclient.NameValuePair; import cz.msebera.android.httpclient.client.entity.UrlEncodedFormEntity; import cz.msebera.android.httpclient.message.BasicNameValuePair; import android.content.SharedPreferences; import android.content.res.Resources; import android.graphics.drawable.Drawable; import android.preference.PreferenceGroup; import android.support.v4.content.res.ResourcesCompat; import com.nttec.everychan.R; import com.nttec.everychan.api.AbstractChanModule; import com.nttec.everychan.api.interfaces.CancellableTask; import com.nttec.everychan.api.interfaces.ProgressListener; import com.nttec.everychan.api.models.BoardModel; import com.nttec.everychan.api.models.CaptchaModel; import com.nttec.everychan.api.models.DeletePostModel; import com.nttec.everychan.api.models.PostModel; import com.nttec.everychan.api.models.SendPostModel; import com.nttec.everychan.api.models.SimpleBoardModel; import com.nttec.everychan.api.models.ThreadModel; import com.nttec.everychan.api.models.UrlPageModel; import com.nttec.everychan.api.util.ChanModels; import com.nttec.everychan.api.util.WakabaReader; import com.nttec.everychan.api.util.WakabaUtils; import com.nttec.everychan.common.IOUtils; import com.nttec.everychan.http.ExtendedMultipartBuilder; import com.nttec.everychan.http.streamer.HttpRequestModel; import com.nttec.everychan.http.streamer.HttpResponseModel; import com.nttec.everychan.http.streamer.HttpStreamer; import com.nttec.everychan.http.streamer.HttpWrongStatusCodeException; public class NowereModule extends AbstractChanModule { static final String NOWERE_NAME = "nowere.net"; static final String NOWERE_DOMAIN = "nowere.net"; static final String NOWERE_URL_HTTP = "http://nowere.net/"; static final String NOWERE_URL_HTTPS = "https://nowere.net/"; public NowereModule(SharedPreferences preferences, Resources resources) { super(preferences, resources); } @Override public String getChanName() { return NOWERE_NAME; } @Override public String getDisplayingName() { return "Nowere.net"; } @Override public Drawable getChanFavicon() { return ResourcesCompat.getDrawable(resources, R.drawable.favicon_nowere, null); } @Override public SimpleBoardModel[] getBoardsList(ProgressListener listener, CancellableTask task, SimpleBoardModel[] oldBoardsList) throws Exception { return NowereBoards.getBoardsList(); } @Override public BoardModel getBoard(String shortName, ProgressListener listener, CancellableTask task) throws Exception { return NowereBoards.getBoard(shortName); } @Override public void addPreferencesOnScreen(PreferenceGroup preferenceGroup) { addPasswordPreference(preferenceGroup); addHttpsPreference(preferenceGroup, false); addProxyPreferences(preferenceGroup); } private String getUsingUrl() { return useHttps(false) ? NOWERE_URL_HTTPS : NOWERE_URL_HTTP; } private ThreadModel[] readWakabaPage(String url, ProgressListener listener, CancellableTask task, boolean checkIfModified) throws Exception { HttpResponseModel responseModel = null; WakabaReader in = null; HttpRequestModel rqModel = HttpRequestModel.builder().setGET().setCheckIfModified(checkIfModified).build(); try { responseModel = HttpStreamer.getInstance().getFromUrl(url, rqModel, httpClient, listener, task); if (responseModel.statusCode == 200) { in = new WakabaReader(responseModel.stream, DateFormats.NOWERE_DATE_FORMAT); if (task != null && task.isCancelled()) throw new Exception("interrupted"); return in.readWakabaPage(); } else { if (responseModel.notModified()) return null; throw new HttpWrongStatusCodeException(responseModel.statusCode, responseModel.statusCode + " - " + responseModel.statusReason); } } catch (Exception e) { if (responseModel != null) HttpStreamer.getInstance().removeFromModifiedMap(url); throw e; } finally { IOUtils.closeQuietly(in); if (responseModel != null) responseModel.release(); } } @Override public ThreadModel[] getThreadsList(String boardName, int page, ProgressListener listener, CancellableTask task, ThreadModel[] oldList) throws Exception { UrlPageModel urlModel = new UrlPageModel(); urlModel.chanName = NOWERE_NAME; urlModel.type = UrlPageModel.TYPE_BOARDPAGE; urlModel.boardName = boardName; urlModel.boardPage = page; String url = buildUrl(urlModel); ThreadModel[] threads = readWakabaPage(url, listener, task, oldList != null); if (threads == null) { return oldList; } else { return threads; } } @Override public PostModel[] getPostsList(String boardName, String threadNumber, ProgressListener listener, CancellableTask task, PostModel[] oldList) throws Exception { UrlPageModel urlModel = new UrlPageModel(); urlModel.chanName = NOWERE_NAME; urlModel.type = UrlPageModel.TYPE_THREADPAGE; urlModel.boardName = boardName; urlModel.threadNumber = threadNumber; String url = buildUrl(urlModel); ThreadModel[] threads = readWakabaPage(url, listener, task, oldList != null); if (threads == null) { return oldList; } else { if (threads.length == 0) throw new Exception("Unable to parse response"); return oldList == null ? threads[0].posts : ChanModels.mergePostsLists(Arrays.asList(oldList), Arrays.asList(threads[0].posts)); } } @Override public CaptchaModel getNewCaptcha(String boardName, String threadNumber, ProgressListener listener, CancellableTask task) throws Exception { String captchaUrl = getUsingUrl() + boardName + "/captcha.pl?key=" + (threadNumber == null ? "mainpage" : ("res" + threadNumber)); return downloadCaptcha(captchaUrl, listener, task); } @Override public String sendPost(SendPostModel model, ProgressListener listener, CancellableTask task) throws Exception { String url = getUsingUrl() + model.boardName + "/wakaba.pl"; ExtendedMultipartBuilder postEntityBuilder = ExtendedMultipartBuilder.create().setDelegates(listener, task) .addString("task", "post"); if (model.threadNumber != null) postEntityBuilder.addString("parent", model.threadNumber); postEntityBuilder.addString("field1", model.name).addString("field2", model.sage ? "sage" : model.email) .addString("field3", model.subject).addString("field4", model.comment) .addString("captcha", model.captchaAnswer).addString("postredir", "1") .addString("password", model.password); if (model.attachments != null && model.attachments.length > 0) postEntityBuilder.addFile("file", model.attachments[0], model.randomHash); else if (model.threadNumber == null) postEntityBuilder.addString("nofile", "on"); HttpRequestModel request = HttpRequestModel.builder().setPOST(postEntityBuilder.build()).setNoRedirect(true) .build(); HttpResponseModel response = null; try { response = HttpStreamer.getInstance().getFromUrl(url, request, httpClient, null, task); if (response.statusCode == 303) { return null; } else if (response.statusCode == 200) { ByteArrayOutputStream output = new ByteArrayOutputStream(1024); IOUtils.copyStream(response.stream, output); String htmlResponse = output.toString("UTF-8"); if (!htmlResponse.contains("<blockquote")) { int start = htmlResponse.indexOf("<h1 style=\"text-align: center\">"); if (start != -1) { int end = htmlResponse.indexOf("<br /><br />", start + 31); if (end != -1) { throw new Exception(htmlResponse.substring(start + 31, end).trim()); } } } } else throw new Exception(response.statusCode + " - " + response.statusReason); } finally { if (response != null) response.release(); } return null; } @Override public String deletePost(DeletePostModel model, ProgressListener listener, CancellableTask task) throws Exception { String url = getUsingUrl() + model.boardName + "/wakaba.pl"; List<NameValuePair> pairs = new ArrayList<NameValuePair>(); pairs.add(new BasicNameValuePair("delete", model.postNumber)); pairs.add(new BasicNameValuePair("task", "delete")); if (model.onlyFiles) pairs.add(new BasicNameValuePair("fileonly", "on")); pairs.add(new BasicNameValuePair("password", model.password)); HttpRequestModel request = HttpRequestModel.builder().setPOST(new UrlEncodedFormEntity(pairs, "UTF-8")) .setNoRedirect(true).build(); HttpResponseModel response = null; try { response = HttpStreamer.getInstance().getFromUrl(url, request, httpClient, null, task); if (response.statusCode == 200) { ByteArrayOutputStream output = new ByteArrayOutputStream(1024); IOUtils.copyStream(response.stream, output); String htmlResponse = output.toString("UTF-8"); if (!htmlResponse.contains("<blockquote")) { int start = htmlResponse.indexOf("<h1 style=\"text-align: center\">"); if (start != -1) { int end = htmlResponse.indexOf("<br /><br />", start + 31); if (end != -1) { throw new Exception(htmlResponse.substring(start + 31, end).trim()); } } } } } finally { if (response != null) response.release(); } return null; } @Override public String buildUrl(UrlPageModel model) throws IllegalArgumentException { if (!model.chanName.equals(NOWERE_NAME)) throw new IllegalArgumentException("wrong chan"); return WakabaUtils.buildUrl(model, getUsingUrl()); } @Override public UrlPageModel parseUrl(String url) throws IllegalArgumentException { return WakabaUtils.parseUrl(url, NOWERE_NAME, NOWERE_DOMAIN); } }