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/*
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* Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package net.micode.notes.gtask.remote;
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import android.accounts.Account;
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import android.accounts.AccountManager;
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import android.accounts.AccountManagerFuture;
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import android.app.Activity;
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import android.os.Bundle;
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import android.text.TextUtils;
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import android.util.Log;
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import net.micode.notes.gtask.data.Node;
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import net.micode.notes.gtask.data.Task;
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import net.micode.notes.gtask.data.TaskList;
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import net.micode.notes.gtask.exception.ActionFailureException;
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import net.micode.notes.gtask.exception.NetworkFailureException;
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import net.micode.notes.tool.GTaskStringUtils;
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import net.micode.notes.ui.NotesPreferenceActivity;
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import org.apache.http.HttpEntity;
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import org.apache.http.HttpResponse;
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import org.apache.http.client.ClientProtocolException;
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import org.apache.http.client.entity.UrlEncodedFormEntity;
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import org.apache.http.client.methods.HttpGet;
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import org.apache.http.client.methods.HttpPost;
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import org.apache.http.cookie.Cookie;
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import org.apache.http.impl.client.BasicCookieStore;
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import org.apache.http.impl.client.DefaultHttpClient;
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import org.apache.http.message.BasicNameValuePair;
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import org.apache.http.params.BasicHttpParams;
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import org.apache.http.params.HttpConnectionParams;
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import org.apache.http.params.HttpParams;
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import org.apache.http.params.HttpProtocolParams;
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import org.json.JSONArray;
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import org.json.JSONException;
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import org.json.JSONObject;
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import java.io.BufferedReader;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.util.LinkedList;
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import java.util.List;
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import java.util.zip.GZIPInputStream;
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import java.util.zip.Inflater;
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import java.util.zip.InflaterInputStream;
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public class GTaskClient {//GTaskClient类：实现GTask的登录以及创建GTask任务和任务列表，从网络上获取任务内容
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private static final String TAG = GTaskClient.class.getSimpleName();//Google邮箱指定URL
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private static final String GTASK_URL = "https://mail.google.com/tasks/";//获得URL
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private static final String GTASK_GET_URL = "https://mail.google.com/tasks/ig";//传递URL
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private static final String GTASK_POST_URL = "https://mail.google.com/tasks/r/ig";
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private static GTaskClient mInstance = null;//后续使用的参数以及变量
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private DefaultHttpClient mHttpClient;
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private String mGetUrl;
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//构造函数：初始化各属性
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private String mPostUrl;
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private long mClientVersion;
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private boolean mLoggedin;
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private long mLastLoginTime;
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private int mActionId;
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private Account mAccount;
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private JSONArray mUpdateArray;
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private GTaskClient() {//初始化客户端，如果没有就new一个，否则就用当前的。
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mHttpClient = null;
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mGetUrl = GTASK_GET_URL;
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mPostUrl = GTASK_POST_URL;
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mClientVersion = -1;
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mLoggedin = false;
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mLastLoginTime = 0;
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mActionId = 1;
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mAccount = null;
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mUpdateArray = null;
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}
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public static synchronized GTaskClient getInstance() {//获取实例，如果当前没有示例，则新建一个登陆的gtask，如果有直接返回
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if (mInstance == null) {
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mInstance = new GTaskClient();
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}
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return mInstance;
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}
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public boolean login(Activity activity) {//login：用于实现登录的方法，以activity作为参数
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// we suppose that the cookie would expire after 5 minutes
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// then we need to re-login
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final long interval = 1000 * 60 * 5;
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if (mLastLoginTime + interval < System.currentTimeMillis()) {
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mLoggedin = false;
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}
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// need to re-login after account switch
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if (mLoggedin//在登陆成功的情况下检测到用户名和密码不匹配时登录失败
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&& !TextUtils.equals(getSyncAccount().name, NotesPreferenceActivity
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.getSyncAccountName(activity))) {
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mLoggedin = false;
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}
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if (mLoggedin) {//代码块，如果登录的时候符合上面的要求则让其显示已登录登陆
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Log.d(TAG, "already logged in");
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return true;
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}
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mLastLoginTime = System.currentTimeMillis();
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String authToken = loginGoogleAccount(activity, false);
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if (authToken == null) {//登录失败的情况
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Log.e(TAG, "login google account failed");
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return false;
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}
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// login with custom domain if necessary
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if (!(mAccount.name.toLowerCase().endsWith("gmail.com") || mAccount.name.toLowerCase()//使用用户域名进行登录
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.endsWith("googlemail.com"))) {
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StringBuilder url = new StringBuilder(GTASK_URL).append("a/");
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int index = mAccount.name.indexOf('@') + 1;//返回@第一次出现的位置并把位置+1后记录在index里
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String suffix = mAccount.name.substring(index);
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url.append(suffix + "/");
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mGetUrl = url.toString() + "ig";
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mPostUrl = url.toString() + "r/ig";
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if (tryToLoginGtask(activity, authToken)) {//成功登入
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mLoggedin = true;
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}
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}
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// try to login with google official url
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if (!mLoggedin) {//代码块： 若前面的尝试失败，则尝试使用官方的域名登陆
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mGetUrl = GTASK_GET_URL;
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mPostUrl = GTASK_POST_URL;
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if (!tryToLoginGtask(activity, authToken)) {//第二次登录失败，返回false
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return false;
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}
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}
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mLoggedin = true;
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return true;
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}
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private String loginGoogleAccount(Activity activity, boolean invalidateToken) {//登录谷歌账号的主函数，在登陆成功后获取认证令牌
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String authToken;
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AccountManager accountManager = AccountManager.get(activity);
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Account[] accounts = accountManager.getAccountsByType("com.google");
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if (accounts.length == 0) {//如果没有这样的账号，输出日志信息“无有效的google账户”
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Log.e(TAG, "there is no available google account");
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return null;
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}
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String accountName = NotesPreferenceActivity.getSyncAccountName(activity);
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Account account = null;
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for (Account a : accounts) {//找到后，为属性赋值
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if (a.name.equals(accountName)) {
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account = a;
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break;
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}
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}
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if (account != null) {//判断设置里有无该账号
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mAccount = account;
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} else {
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Log.e(TAG, "unable to get an account with the same name in the settings");
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return null;
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}
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// get the token now
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AccountManagerFuture<Bundle> accountManagerFuture = accountManager.getAuthToken(account,
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"goanna_mobile", null, activity, null, null);
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try {
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Bundle authTokenBundle = accountManagerFuture.getResult();
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authToken = authTokenBundle.getString(AccountManager.KEY_AUTHTOKEN);
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if (invalidateToken) {//如果是非法的令牌，那么废除这个账号，取消登录状态
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accountManager.invalidateAuthToken("com.google", authToken);
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loginGoogleAccount(activity, false);
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}
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} catch (Exception e) {
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Log.e(TAG, "get auth token failed");
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authToken = null;
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}
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return authToken;
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}
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private boolean tryToLoginGtask(Activity activity, String authToken) {//方法：用于判断令牌对于登陆gtask账号是否有效
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if (!loginGtask(authToken)) {
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// maybe the auth token is out of date, now let's invalidate the
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// token and try again
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authToken = loginGoogleAccount(activity, true);
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if (authToken == null) {
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Log.e(TAG, "login google account failed");
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return false;
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}
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if (!loginGtask(authToken)) {//代码块： 重新获取的令牌再次失效
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Log.e(TAG, "login gtask failed");
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return false;
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}
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}
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return true;
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}
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private boolean loginGtask(String authToken) {//.loginGtask：实现登录Gtask的方法
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int timeoutConnection = 10000;
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int timeoutSocket = 15000;
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HttpParams httpParameters = new BasicHttpParams();
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HttpConnectionParams.setConnectionTimeout(httpParameters, timeoutConnection);
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HttpConnectionParams.setSoTimeout(httpParameters, timeoutSocket);
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mHttpClient = new DefaultHttpClient(httpParameters);
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BasicCookieStore localBasicCookieStore = new BasicCookieStore();
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mHttpClient.setCookieStore(localBasicCookieStore);
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HttpProtocolParams.setUseExpectContinue(mHttpClient.getParams(), false);
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// login gtask
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try {//登录Gtask
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String loginUrl = mGetUrl + "?auth=" + authToken;
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HttpGet httpGet = new HttpGet(loginUrl);
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HttpResponse response = null;
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response = mHttpClient.execute(httpGet);
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// get the cookie now
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List<Cookie> cookies = mHttpClient.getCookieStore().getCookies();
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boolean hasAuthCookie = false;
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for (Cookie cookie : cookies) {
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if (cookie.getName().contains("GTL")) {//验证cookie信息，这里通过GTL标志来验证
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hasAuthCookie = true;
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}
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}
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if (!hasAuthCookie) {
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Log.w(TAG, "it seems that there is no auth cookie");
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}
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// get the client version
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String resString = getResponseContent(response.getEntity());
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String jsBegin = "_setup(";
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String jsEnd = ")}</script>";
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int begin = resString.indexOf(jsBegin);
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int end = resString.lastIndexOf(jsEnd);
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String jsString = null;
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if (begin != -1 && end != -1 && begin < end) {
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jsString = resString.substring(begin + jsBegin.length(), end);
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}
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JSONObject js = new JSONObject(jsString);
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mClientVersion = js.getLong("v");//验证cookie信息，这里通过GTL标志来验证
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} catch (JSONException e) {
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Log.e(TAG, e.toString());
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e.printStackTrace();
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return false;
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} catch (Exception e) {
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// simply catch all exceptions
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Log.e(TAG, "httpget gtask_url failed");
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return false;
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}
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return true;
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}
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private int getActionId() {
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return mActionId++;
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}//获取动作的id号码
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private HttpPost createHttpPost() {
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HttpPost httpPost = new HttpPost(mPostUrl);
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httpPost.setHeader("Content-Type", "application/x-www-form-urlencoded;charset=utf-8");
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httpPost.setHeader("AT", "1");
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return httpPost;
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}
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private String getResponseContent(HttpEntity entity) throws IOException {//getResponseContent：获取服务器响应的数据，主要通过方法getContentEncoding来获取网上资源，返回这些资源
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String contentEncoding = null;
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if (entity.getContentEncoding() != null) {
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contentEncoding = entity.getContentEncoding().getValue();
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Log.d(TAG, "encoding: " + contentEncoding);
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}
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InputStream input = entity.getContent();
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if (contentEncoding != null && contentEncoding.equalsIgnoreCase("gzip")) {
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input = new GZIPInputStream(entity.getContent());
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} else if (contentEncoding != null && contentEncoding.equalsIgnoreCase("deflate")) {
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Inflater inflater = new Inflater(true);
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input = new InflaterInputStream(entity.getContent(), inflater);
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}
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try {//完成将字节流数据内容进行存储的功能
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InputStreamReader isr = new InputStreamReader(input);
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BufferedReader br = new BufferedReader(isr);
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StringBuilder sb = new StringBuilder();
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while (true) {
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String buff = br.readLine();
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if (buff == null) {
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return sb.toString();
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}
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sb = sb.append(buff);
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}
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} finally {
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input.close();
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}
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}
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private JSONObject postRequest(JSONObject js) throws NetworkFailureException {//获取客户端资源的函数
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if (!mLoggedin) {
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Log.e(TAG, "please login first");
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throw new ActionFailureException("not logged in");
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}
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HttpPost httpPost = createHttpPost();
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try {//.实例化一个对象，用于与服务器交互和发送请求
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LinkedList<BasicNameValuePair> list = new LinkedList<BasicNameValuePair>();
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list.add(new BasicNameValuePair("r", js.toString()));
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UrlEncodedFormEntity entity = new UrlEncodedFormEntity(list, "UTF-8");
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httpPost.setEntity(entity);
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// execute the post
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HttpResponse response = mHttpClient.execute(httpPost);
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String jsString = getResponseContent(response.getEntity());
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return new JSONObject(jsString);
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} catch (ClientProtocolException e) {
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Log.e(TAG, e.toString());
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e.printStackTrace();
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throw new NetworkFailureException("postRequest failed");
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} catch (IOException e) {
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Log.e(TAG, e.toString());
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e.printStackTrace();
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throw new NetworkFailureException("postRequest failed");
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} catch (JSONException e) {
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Log.e(TAG, e.toString());
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e.printStackTrace();
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throw new ActionFailureException("unable to convert response content to jsonobject");
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} catch (Exception e) {
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Log.e(TAG, e.toString());
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e.printStackTrace();
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throw new ActionFailureException("error occurs when posting request");
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}
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}
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public void createTask(Task task) throws NetworkFailureException {//创建单个任务，通过json获取TASK中的内容并创建对应的jsPost，通过postRequest方法获取任务的返回信息，使用setGid方法设置task的new_id
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commitUpdate();
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try {
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JSONObject jsPost = new JSONObject();
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JSONArray actionList = new JSONArray();
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// action_list
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actionList.put(task.getCreateAction(getActionId()));
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jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, actionList);
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// client_version
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jsPost.put(GTaskStringUtils.GTASK_JSON_CLIENT_VERSION, mClientVersion);
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// post
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JSONObject jsResponse = postRequest(jsPost);
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JSONObject jsResult = (JSONObject) jsResponse.getJSONArray(
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GTaskStringUtils.GTASK_JSON_RESULTS).get(0);
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task.setGid(jsResult.getString(GTaskStringUtils.GTASK_JSON_NEW_ID));
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} catch (JSONException e) {//对异常情况的处理
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Log.e(TAG, e.toString());
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e.printStackTrace();
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throw new ActionFailureException("create task: handing jsonobject failed");
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}
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}
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public void createTaskList(TaskList tasklist) throws NetworkFailureException {//创建一个任务列表
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commitUpdate();
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try {
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JSONObject jsPost = new JSONObject();
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JSONArray actionList = new JSONArray();
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// action_list
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actionList.put(tasklist.getCreateAction(getActionId()));
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jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, actionList);
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// client version
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jsPost.put(GTaskStringUtils.GTASK_JSON_CLIENT_VERSION, mClientVersion);
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// post
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JSONObject jsResponse = postRequest(jsPost);
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JSONObject jsResult = (JSONObject) jsResponse.getJSONArray(
|
|
|
GTaskStringUtils.GTASK_JSON_RESULTS).get(0);
|
|
|
tasklist.setGid(jsResult.getString(GTaskStringUtils.GTASK_JSON_NEW_ID));
|
|
|
|
|
|
} catch (JSONException e) {//创建失败
|
|
|
Log.e(TAG, e.toString());
|
|
|
e.printStackTrace();
|
|
|
throw new ActionFailureException("create tasklist: handing jsonobject failed");
|
|
|
}
|
|
|
}
|
|
|
|
|
|
public void commitUpdate() throws NetworkFailureException {//更新时出现异常
|
|
|
if (mUpdateArray != null) {
|
|
|
try {
|
|
|
JSONObject jsPost = new JSONObject();
|
|
|
|
|
|
// action_list
|
|
|
jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, mUpdateArray);
|
|
|
|
|
|
// client_version
|
|
|
jsPost.put(GTaskStringUtils.GTASK_JSON_CLIENT_VERSION, mClientVersion);
|
|
|
|
|
|
postRequest(jsPost);
|
|
|
mUpdateArray = null;
|
|
|
} catch (JSONException e) {
|
|
|
Log.e(TAG, e.toString());
|
|
|
e.printStackTrace();
|
|
|
throw new ActionFailureException("commit update: handing jsonobject failed");
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
|
|
|
public void addUpdateNode(Node node) throws NetworkFailureException {//添加更新节点，主要利用commitUpdate
|
|
|
if (node != null) {
|
|
|
// too many update items may result in an error
|
|
|
// set max to 10 items
|
|
|
if (mUpdateArray != null && mUpdateArray.length() > 10) {
|
|
|
commitUpdate();
|
|
|
}
|
|
|
|
|
|
if (mUpdateArray == null)
|
|
|
mUpdateArray = new JSONArray();
|
|
|
mUpdateArray.put(node.getUpdateAction(getActionId()));
|
|
|
}
|
|
|
}
|
|
|
|
|
|
public void moveTask(Task task, TaskList preParent, TaskList curParent)//移动一个任务，通过getGid获取task所属的Id，还是通过JSONObject和postRequest实现
|
|
|
throws NetworkFailureException {
|
|
|
commitUpdate();
|
|
|
try {
|
|
|
JSONObject jsPost = new JSONObject();
|
|
|
JSONArray actionList = new JSONArray();
|
|
|
JSONObject action = new JSONObject();
|
|
|
|
|
|
// action_list
|
|
|
action.put(GTaskStringUtils.GTASK_JSON_ACTION_TYPE,
|
|
|
GTaskStringUtils.GTASK_JSON_ACTION_TYPE_MOVE);
|
|
|
action.put(GTaskStringUtils.GTASK_JSON_ACTION_ID, getActionId());
|
|
|
action.put(GTaskStringUtils.GTASK_JSON_ID, task.getGid());
|
|
|
if (preParent == curParent && task.getPriorSibling() != null) {//只有当移动是发生在任务列表中且不是第一个时设置优先级
|
|
|
// put prioring_sibing_id only if moving within the tasklist and
|
|
|
// it is not the first one
|
|
|
action.put(GTaskStringUtils.GTASK_JSON_PRIOR_SIBLING_ID, task.getPriorSibling());
|
|
|
}
|
|
|
action.put(GTaskStringUtils.GTASK_JSON_SOURCE_LIST, preParent.getGid());
|
|
|
action.put(GTaskStringUtils.GTASK_JSON_DEST_PARENT, curParent.getGid());
|
|
|
if (preParent != curParent) {//当移动发生在不同的任务列表之间，设置为dest_list
|
|
|
// put the dest_list only if moving between tasklists
|
|
|
action.put(GTaskStringUtils.GTASK_JSON_DEST_LIST, curParent.getGid());
|
|
|
}
|
|
|
actionList.put(action);
|
|
|
jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, actionList);
|
|
|
|
|
|
// client_version
|
|
|
jsPost.put(GTaskStringUtils.GTASK_JSON_CLIENT_VERSION, mClientVersion);
|
|
|
|
|
|
postRequest(jsPost);
|
|
|
|
|
|
} catch (JSONException e) {
|
|
|
Log.e(TAG, e.toString());
|
|
|
e.printStackTrace();
|
|
|
throw new ActionFailureException("move task: handing jsonobject failed");
|
|
|
}
|
|
|
}
|
|
|
|
|
|
public void deleteNode(Node node) throws NetworkFailureException {//删除节点，过程类似移动
|
|
|
commitUpdate();
|
|
|
try {
|
|
|
JSONObject jsPost = new JSONObject();
|
|
|
JSONArray actionList = new JSONArray();
|
|
|
|
|
|
// action_list
|
|
|
node.setDeleted(true);
|
|
|
actionList.put(node.getUpdateAction(getActionId()));
|
|
|
jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, actionList);
|
|
|
|
|
|
// client_version
|
|
|
jsPost.put(GTaskStringUtils.GTASK_JSON_CLIENT_VERSION, mClientVersion);
|
|
|
|
|
|
postRequest(jsPost);
|
|
|
mUpdateArray = null;
|
|
|
} catch (JSONException e) {
|
|
|
Log.e(TAG, e.toString());
|
|
|
e.printStackTrace();
|
|
|
throw new ActionFailureException("delete node: handing jsonobject failed");
|
|
|
}
|
|
|
}
|
|
|
|
|
|
public JSONArray getTaskLists() throws NetworkFailureException {//获取任务列表，首先通过getURI在网上获取数据，在截取所需部分内容返回
|
|
|
if (!mLoggedin) {
|
|
|
Log.e(TAG, "please login first");
|
|
|
throw new ActionFailureException("not logged in");
|
|
|
}
|
|
|
|
|
|
try {
|
|
|
HttpGet httpGet = new HttpGet(mGetUrl);
|
|
|
HttpResponse response = null;
|
|
|
response = mHttpClient.execute(httpGet);
|
|
|
|
|
|
// get the task list
|
|
|
String resString = getResponseContent(response.getEntity());
|
|
|
String jsBegin = "_setup(";
|
|
|
String jsEnd = ")}</script>";
|
|
|
int begin = resString.indexOf(jsBegin);
|
|
|
int end = resString.lastIndexOf(jsEnd);
|
|
|
String jsString = null;
|
|
|
if (begin != -1 && end != -1 && begin < end) {//带参数的获取指定的任务列表
|
|
|
jsString = resString.substring(begin + jsBegin.length(), end);
|
|
|
}
|
|
|
JSONObject js = new JSONObject(jsString);
|
|
|
return js.getJSONObject("t").getJSONArray(GTaskStringUtils.GTASK_JSON_LISTS);
|
|
|
} catch (ClientProtocolException e) {
|
|
|
Log.e(TAG, e.toString());
|
|
|
e.printStackTrace();
|
|
|
throw new NetworkFailureException("gettasklists: httpget failed");
|
|
|
} catch (IOException e) {
|
|
|
Log.e(TAG, e.toString());
|
|
|
e.printStackTrace();
|
|
|
throw new NetworkFailureException("gettasklists: httpget failed");
|
|
|
} catch (JSONException e) {
|
|
|
Log.e(TAG, e.toString());
|
|
|
e.printStackTrace();
|
|
|
throw new ActionFailureException("get task lists: handing jasonobject failed");
|
|
|
}
|
|
|
}
|
|
|
|
|
|
public JSONArray getTaskList(String listGid) throws NetworkFailureException {//方法：对于已经获取的任务列表，可以通过其id来获取到
|
|
|
commitUpdate();
|
|
|
try {
|
|
|
JSONObject jsPost = new JSONObject();
|
|
|
JSONArray actionList = new JSONArray();
|
|
|
JSONObject action = new JSONObject();
|
|
|
|
|
|
// action_list 通过action.pu()t对JSONObject对象action添加元素，通过jsPost.put()对jsPost添加相关元素，然后通过postRequest()提交更新后的请求并返回一个JSONObject的对象，最后使用jsResponse.getJSONArray( )获取jsResponse中的JSONArray值并作为函数返回值
|
|
|
action.put(GTaskStringUtils.GTASK_JSON_ACTION_TYPE,
|
|
|
GTaskStringUtils.GTASK_JSON_ACTION_TYPE_GETALL);
|
|
|
action.put(GTaskStringUtils.GTASK_JSON_ACTION_ID, getActionId());
|
|
|
action.put(GTaskStringUtils.GTASK_JSON_LIST_ID, listGid);
|
|
|
action.put(GTaskStringUtils.GTASK_JSON_GET_DELETED, false);
|
|
|
actionList.put(action);
|
|
|
jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, actionList);
|
|
|
|
|
|
// client_version
|
|
|
jsPost.put(GTaskStringUtils.GTASK_JSON_CLIENT_VERSION, mClientVersion);
|
|
|
|
|
|
JSONObject jsResponse = postRequest(jsPost);
|
|
|
return jsResponse.getJSONArray(GTaskStringUtils.GTASK_JSON_TASKS);
|
|
|
} catch (JSONException e) {//处理异常
|
|
|
Log.e(TAG, e.toString());
|
|
|
e.printStackTrace();
|
|
|
throw new ActionFailureException("get task list: handing jsonobject failed");
|
|
|
}
|
|
|
}
|
|
|
|
|
|
public Account getSyncAccount() {
|
|
|
return mAccount;
|
|
|
}//获得同步账户
|
|
|
|
|
|
public void resetUpdateArray() {
|
|
|
mUpdateArray = null;
|
|
|
}//重置更新内容
|
|
|
}
|
