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package net.micode.notes.gtask.remote;
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/*
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* 主要功能：实现GTASK的登录操作，进行GTASK任务的创建，创建任务列表，从网络上获取任务和任务列表的内容
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* 主要使用类或技术：accountManager JSONObject HttpParams authToken Gid
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*/
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public class GTaskClient {
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private static final String TAG = GTaskClient.class.getSimpleName();
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private static final String GTASK_URL = "https://mail.google.com/tasks/"; //这个是指定的URL
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private static final String GTASK_GET_URL = "https://mail.google.com/tasks/ig";
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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;
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private DefaultHttpClient mHttpClient;
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private String mGetUrl;
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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() {
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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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/*用来获取的实例化对象
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* 使用 getInstance()
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* 返回mInstance这个实例化对象
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*/
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public static synchronized GTaskClient getInstance() {
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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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/*用来实现登录操作的函数，传入的参数是一个Activity
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* 设置登录操作限制时间，如果超时则需要重新登录
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* 有两种登录方式，使用用户自己的URL登录或者使用谷歌官方的URL登录
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* 返回true或者false，即最后是否登陆成功
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*/
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public boolean login(Activity activity) {
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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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//判断距离最后一次登录操作是否超过5分钟
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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 重新登录操作
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if (mLoggedin
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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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//如果没超过时间，则不需要重新登录
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if (mLoggedin) {
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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();//更新最后登录时间，改为系统当前的时间
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String authToken = loginGoogleAccount(activity, false);//判断是否登录到谷歌账户
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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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// login with custom domain if necessary
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//尝试使用用户自己的域名登录
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if (!(mAccount.name.toLowerCase().endsWith("gmail.com") || mAccount.name.toLowerCase() //将用户账号名改为统一格式（小写）后判断是否为一个谷歌账号地址
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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;
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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"; //设置用户对应的getUrl
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mPostUrl = url.toString() + "r/ig"; //设置用户对应的postUrl
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if (tryToLoginGtask(activity, authToken)) {
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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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//如果用户账户无法登录，则使用谷歌官方的URI进行登录
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if (!mLoggedin) {
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mGetUrl = GTASK_GET_URL;
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mPostUrl = GTASK_POST_URL;
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if (!tryToLoginGtask(activity, authToken)) {
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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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/*具体实现登录谷歌账户的方法
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* 使用令牌机制
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* 使用AccountManager来管理注册账号
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* 返回值是账号的令牌
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*/
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private String loginGoogleAccount(Activity activity, boolean invalidateToken) {
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String authToken; //令牌，是登录操作保证安全性的一个方法
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AccountManager accountManager = AccountManager.get(activity);//AccountManager这个类给用户提供了集中注册账号的接口
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Account[] accounts = accountManager.getAccountsByType("com.google");//获取全部以com.google结尾的account
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if (accounts.length == 0) {
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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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//遍历获得的accounts信息，寻找已经记录过的账户信息
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for (Account a : accounts) {
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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) {
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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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//获取选中账号的令牌
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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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//如果是invalidateToken，那么需要调用invalidateAuthToken(String, String)方法废除这个无效token
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if (invalidateToken) {
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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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//尝试登陆Gtask，这只是一个预先判断令牌是否是有效以及是否能登上GTask的方法,而不是具体实现登陆的方法
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private boolean tryToLoginGtask(Activity activity, String authToken) {
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if (!loginGtask(authToken)) {
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// maybe the auth token is out of authTokedate, now let's invalidate the
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// token and try again
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//删除过一个无效的authToken，申请一个新的后再次尝试登陆
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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)) {
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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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//实现登录GTask的具体操作
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private boolean loginGtask(String authToken) {
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int timeoutConnection = 10000;
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int timeoutSocket = 15000; //socket是一种通信连接实现数据的交换的端口
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HttpParams httpParameters = new BasicHttpParams(); //实例化一个新的HTTP参数类
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HttpConnectionParams.setConnectionTimeout(httpParameters, timeoutConnection);//设置连接超时时间
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HttpConnectionParams.setSoTimeout(httpParameters, timeoutSocket);//设置设置端口超时时间
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mHttpClient = new DefaultHttpClient(httpParameters);
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BasicCookieStore localBasicCookieStore = new BasicCookieStore(); //设置本地cookie
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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 {
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String loginUrl = mGetUrl + "?auth=" + authToken; //设置登录的url
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HttpGet httpGet = new HttpGet(loginUrl); //通过登录的uri实例化网页上资源的查找
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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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//获取CookieStore里存放的cookie,看如果存有“GTL(不知道什么意思)”，则说明有验证成功的有效的cookie
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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")) {
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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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//获取client的内容，具体操作是在返回的Content中截取从_setup(开始到)}</script>中间的字符串内容，也就是gtask_url的内容
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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");
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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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}
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/*实例化创建一个用于向网络传输数据的对象
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* 使用HttpPost类
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* 返回一个httpPost实例化对象，但里面还没有内容
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*/
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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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/*通过URL获取响应后返回的数据，也就是网络上的数据和资源
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* 使用getContentEncoding()获取网络上的资源和数据
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* 返回值就是获取到的资源
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*/
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private String getResponseContent(HttpEntity entity) throws IOException {
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String contentEncoding = null;
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if (entity.getContentEncoding() != null) {//通过URL得到HttpEntity对象，如果不为空则使用getContent（）方法创建一个流将数据从网络都过来
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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")) {//GZIP是使用DEFLATE进行压缩数据的另一个压缩库
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input = new GZIPInputStream(entity.getContent());
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} else if (contentEncoding != null && contentEncoding.equalsIgnoreCase("deflate")) {//DEFLATE是一个无专利的压缩算法，它可以实现无损数据压缩
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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 {
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InputStreamReader isr = new InputStreamReader(input);
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BufferedReader br = new BufferedReader(isr);//是一个包装类，它可以包装字符流，将字符流放入缓存里，先把字符读到缓存里，到缓存满了时候，再读入内存，是为了提供读的效率而设计的
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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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/*通过JSON发送请求
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* 请求的具体内容在json的实例化对象js中然后传入
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* 利用UrlEncodedFormEntity entity和httpPost.setEntity(entity)方法把js中的内容放置到httpPost中
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* 执行请求后使用getResponseContent方法得到返回的数据和资源
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* 将资源再次放入json后返回
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*/
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private JSONObject postRequest(JSONObject js) throws NetworkFailureException {
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if (!mLoggedin) {//未登录
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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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//实例化一个httpPost的对象用来向服务器传输数据，在这里就是发送请求，而请求的内容在js里
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HttpPost httpPost = createHttpPost();
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try {
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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"); //UrlEncodedFormEntity()的形式比较单一，是普通的键值对
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httpPost.setEntity(entity);
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// execute the post
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//执行这个请求
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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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/*创建单个任务
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* 传入参数是一个.gtask.data.Task包里Task类的对象
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* 利用json获取Task里的内容,并且创建相应的jsPost
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* 利用postRequest得到任务的返回信息
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* 使用task.setGid设置task的new_ID
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*/
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public void createTask(Task task) throws NetworkFailureException {
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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) {
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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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/*
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* 创建一个任务列表，与createTask几乎一样，区别就是最后设置的是tasklist的gid
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*/
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public void createTaskList(TaskList tasklist) throws NetworkFailureException {
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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
|
|
|
jsPost.put(GTaskStringUtils.GTASK_JSON_CLIENT_VERSION, mClientVersion);
|
|
|
|
|
|
// post
|
|
|
JSONObject jsResponse = postRequest(jsPost);
|
|
|
JSONObject jsResult = (JSONObject) jsResponse.getJSONArray(
|
|
|
GTaskStringUtils.GTASK_JSON_RESULTS).get(0);
|
|
|
tasklist.setGid(jsResult.getString(GTaskStringUtils.GTASK_JSON_NEW_ID));
|
|
|
|
|
|
} catch (JSONException e) {
|
|
|
Log.e(TAG, e.toString());
|
|
|
e.printStackTrace();
|
|
|
throw new ActionFailureException("create tasklist: handing jsonobject failed");
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/*
|
|
|
* 同步更新操作
|
|
|
* 使用JSONObject进行数据存储，使用jsPost.put，Put的信息包括UpdateArray和ClientVersion
|
|
|
* 使用postRequest发送这个jspost,进行处理
|
|
|
*/
|
|
|
public void commitUpdate() throws NetworkFailureException {
|
|
|
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");
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/*
|
|
|
* 添加更新的事项
|
|
|
* 调用commitUpdate()实现
|
|
|
*/
|
|
|
public void addUpdateNode(Node node) throws NetworkFailureException {
|
|
|
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()));
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/*
|
|
|
* 移动task,比如讲task移动到不同的task列表中去
|
|
|
* 通过getGid获取task所属列表的gid
|
|
|
* 通过JSONObject.put(String name, Object value)函数设置移动后的task的相关属性值，从而达到移动的目的
|
|
|
* 最后还是通过postRequest进行更新后的发送
|
|
|
*/
|
|
|
public void moveTask(Task task, TaskList preParent, TaskList curParent)
|
|
|
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) {
|
|
|
// put prioring_sibing_id only if moving within the tasklist and
|
|
|
// it is not the first one
|
|
|
//设置优先级ID，只有当移动是发生在文件中
|
|
|
action.put(GTaskStringUtils.GTASK_JSON_PRIOR_SIBLING_ID, task.getPriorSibling());
|
|
|
}
|
|
|
action.put(GTaskStringUtils.GTASK_JSON_SOURCE_LIST, preParent.getGid()); //设置移动前所属列表
|
|
|
action.put(GTaskStringUtils.GTASK_JSON_DEST_PARENT, curParent.getGid()); //设置当前所属列表
|
|
|
if (preParent != curParent) {
|
|
|
// put the dest_list only if moving between tasklists
|
|
|
action.put(GTaskStringUtils.GTASK_JSON_DEST_LIST, curParent.getGid());
|
|
|
}
|
|
|
actionList.put(action);
|
|
|
//最后将ACTION_LIST加入到jsPost中
|
|
|
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");
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/*
|
|
|
* 删除操作节点
|
|
|
* 还是利用JSON
|
|
|
* 删除过后使用postRequest发送删除后的结果
|
|
|
*/
|
|
|
public void deleteNode(Node node) throws NetworkFailureException {
|
|
|
commitUpdate();
|
|
|
try {
|
|
|
JSONObject jsPost = new JSONObject();
|
|
|
JSONArray actionList = new JSONArray();
|
|
|
|
|
|
// action_list
|
|
|
node.setDeleted(true);
|
|
|
actionList.put(node.getUpdateAction(getActionId())); //这里会获取到删除操作的ID，加入到actionLiast中
|
|
|
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");
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/*
|
|
|
* 获取任务列表
|
|
|
* 首先通过GetURI使用getResponseContent从网上获取数据
|
|
|
* 然后筛选出"_setup("到)}</script>的部分，并且从中获取GTASK_JSON_LISTS的内容返回
|
|
|
*/
|
|
|
public JSONArray getTaskLists() throws NetworkFailureException {
|
|
|
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
|
|
|
//筛选工作，把筛选出的字符串放入jsString
|
|
|
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) {
|
|
|
jsString = resString.substring(begin + jsBegin.length(), end);
|
|
|
}
|
|
|
JSONObject js = new JSONObject(jsString);
|
|
|
//获取GTASK_JSON_LISTS
|
|
|
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");
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/*
|
|
|
* 通过传入的TASKList的gid,从网络上获取相应属于这个任务列表的任务
|
|
|
*/
|
|
|
public JSONArray getTaskList(String listGid) 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_GETALL);
|
|
|
action.put(GTaskStringUtils.GTASK_JSON_ACTION_ID, getActionId());
|
|
|
action.put(GTaskStringUtils.GTASK_JSON_LIST_ID, listGid); //这里设置为传入的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) {
|
|
|
Log.e(TAG, e.toString());
|
|
|
e.printStackTrace();
|
|
|
throw new ActionFailureException("get task list: handing jsonobject failed");
|
|
|
}
|
|
|
}
|
|
|
|
|
|
public Account getSyncAccount() {
|
|
|
return mAccount;
|
|
|
}
|
|
|
|
|
|
//重置更新的内容
|
|
|
public void resetUpdateArray() {
|
|
|
mUpdateArray = null;
|
|
|
}
|
|
|
} |
