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gtask/GTaskClient.java
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/*
* Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package net.micode.notes.gtask.remote;
//导入Android账户相关类
import android.accounts.Account;
import android.accounts.AccountManager;
import android.accounts.AccountManagerFuture;
import android.app.Activity;
import android.os.Bundle;
import android.text.TextUtils;
import android.util.Log;
//导入自定义数据结构和工具类
import net.micode.notes.gtask.data.Node;
import net.micode.notes.gtask.data.Task;
import net.micode.notes.gtask.data.TaskList;
import net.micode.notes.gtask.exception.ActionFailureException;
import net.micode.notes.gtask.exception.NetworkFailureException;
import net.micode.notes.tool.GTaskStringUtils;
import net.micode.notes.ui.NotesPreferenceActivity;
// 导入Apache HttpClient相关类
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.cookie.Cookie;
import org.apache.http.impl.client.BasicCookieStore;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.params.HttpParams;
import org.apache.http.params.HttpProtocolParams;
// JSON处理类
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
// Java IO相关类
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.LinkedList;
import java.util.List;
import java.util.zip.GZIPInputStream;
import java.util.zip.Inflater;
import java.util.zip.InflaterInputStream;
public class GTaskClient {
// 日志标签
private static final String TAG = GTaskClient.class.getSimpleName();
// Google Tasks API地址
private static final String GTASK_URL = "https://mail.google.com/tasks/";
private static final String GTASK_GET_URL = "https://mail.google.com/tasks/ig";
private static final String GTASK_POST_URL = "https://mail.google.com/tasks/r/ig";
private static GTaskClient mInstance = null;
// HTTP客户端和相关配置
private DefaultHttpClient mHttpClient;// HTTP客户端实例
private String mGetUrl;
private String mPostUrl;
private long mClientVersion;
private boolean mLoggedin;
private long mLastLoginTime;
private int mActionId;
private Account mAccount;
private JSONArray mUpdateArray;
// 私有构造函数
private GTaskClient() {
mHttpClient = null;
mGetUrl = GTASK_GET_URL;
mPostUrl = GTASK_POST_URL;
mClientVersion = -1;
mLoggedin = false;
mLastLoginTime = 0;
mActionId = 1;
mAccount = null;
mUpdateArray = null;
}
// 获取单例实例
public static synchronized GTaskClient getInstance() {
if (mInstance == null) {
mInstance = new GTaskClient();
}
return mInstance;
}
public boolean login(Activity activity) {
// we suppose that the cookie would expire after 5 minutes
// then we need to re-login
// 检查登录有效期（5分钟）
final long interval = 1000 * 60 * 5;
if (mLastLoginTime + interval < System.currentTimeMillis()) {
mLoggedin = false;
// 超时需重新登录
}
// need to re-login after account switch
// 检查账户是否变更
if (mLoggedin
&& !TextUtils.equals(getSyncAccount().name, NotesPreferenceActivity
.getSyncAccountName(activity))) {
mLoggedin = false;
}
if (mLoggedin) {
Log.d(TAG, "already logged in");
return true;
}
// 更新最后登录时间
mLastLoginTime = System.currentTimeMillis();
// 获取Google账户授权令牌
String authToken = loginGoogleAccount(activity, false);
if (authToken == null) {
Log.e(TAG, "login google account failed");
return false;
}
// 处理自定义域名账户
// login with custom domain if necessary
if (!(mAccount.name.toLowerCase().endsWith("gmail.com") || mAccount.name.toLowerCase()
.endsWith("googlemail.com"))) {
// 构建自定义URL路径
StringBuilder url = new StringBuilder(GTASK_URL).append("a/");
int index = mAccount.name.indexOf('@') + 1;
String suffix = mAccount.name.substring(index);
url.append(suffix + "/");
mGetUrl = url.toString() + "ig";
mPostUrl = url.toString() + "r/ig";
// 尝试登录自定义域名
if (tryToLoginGtask(activity, authToken)) {
mLoggedin = true;
}
}
// try to login with google official url
if (!mLoggedin) {
mGetUrl = GTASK_GET_URL;
mPostUrl = GTASK_POST_URL;
if (!tryToLoginGtask(activity, authToken)) {
return false;
}
}
mLoggedin = true;
return true;
}
private String loginGoogleAccount(Activity activity, boolean invalidateToken) {
String authToken;
// 账户管理器操作
AccountManager accountManager = AccountManager.get(activity);
Account[] accounts = accountManager.getAccountsByType("com.google");
// 无可用账户检查
if (accounts.length == 0) {
Log.e(TAG, "there is no available google account");
return null;
}
// 获取配置中的同步账户
String accountName = NotesPreferenceActivity.getSyncAccountName(activity);
Account account = null;
// 遍历匹配账户名称
for (Account a : accounts) {
if (a.name.equals(accountName)) {
account = a;
break;
}
}
if (account != null) {
// 设置当前账户
mAccount = account;
} else {
Log.e(TAG, "unable to get an account with the same name in the settings");
return null;
}
// get the token now
AccountManagerFuture<Bundle> accountManagerFuture = accountManager.getAuthToken(account,
"goanna_mobile", null, activity, null, null);
// 获取授权令牌
try {
Bundle authTokenBundle = accountManagerFuture.getResult();
authToken = authTokenBundle.getString(AccountManager.KEY_AUTHTOKEN);
// 需要失效旧令牌时重新获取
if (invalidateToken) {
accountManager.invalidateAuthToken("com.google", authToken);
loginGoogleAccount(activity, false);
}
} catch (Exception e) {
Log.e(TAG, "get auth token failed");
authToken = null;
}
return authToken;
}
private boolean tryToLoginGtask(Activity activity, String authToken) {
// 首次登录尝试
if (!loginGtask(authToken)) {
// maybe the auth token is out of date, now let's invalidate the
// token and try again
authToken = loginGoogleAccount(activity, true);
if (authToken == null) {
Log.e(TAG, "login google account failed");
return false;
}
// 使用新令牌再次尝试登录
if (!loginGtask(authToken)) {
Log.e(TAG, "login gtask failed");
return false;
}
}
return true;
}
private boolean loginGtask(String authToken) {
// 设置HTTP连接参数
int timeoutConnection = 10000;
int timeoutSocket = 15000;
HttpParams httpParameters = new BasicHttpParams();
HttpConnectionParams.setConnectionTimeout(httpParameters, timeoutConnection);
HttpConnectionParams.setSoTimeout(httpParameters, timeoutSocket);
// 初始化HTTP客户端
mHttpClient = new DefaultHttpClient(httpParameters);
BasicCookieStore localBasicCookieStore = new BasicCookieStore();
mHttpClient.setCookieStore(localBasicCookieStore);
HttpProtocolParams.setUseExpectContinue(mHttpClient.getParams(), false);
// login gtask
try {
// 构建带认证令牌的登录URL
String loginUrl = mGetUrl + "?auth=" + authToken;
HttpGet httpGet = new HttpGet(loginUrl);
HttpResponse response = null;
response = mHttpClient.execute(httpGet);
// get the cookie now
List<Cookie> cookies = mHttpClient.getCookieStore().getCookies();
boolean hasAuthCookie = false;
for (Cookie cookie : cookies) {
if (cookie.getName().contains("GTL")) {
hasAuthCookie = true;
}
}
if (!hasAuthCookie) {
Log.w(TAG, "it seems that there is no auth cookie");
}
// get the client version
// 解析响应内容获取客户端版本
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);
mClientVersion = js.getLong("v");
} catch (JSONException e) {
Log.e(TAG, e.toString());
e.printStackTrace();
return false;
} catch (Exception e) {
// simply catch all exceptions
Log.e(TAG, "httpget gtask_url failed");
return false;
}
return true;
}
private int getActionId() {
return mActionId++;
}
private HttpPost createHttpPost() {
HttpPost httpPost = new HttpPost(mPostUrl);
// 设置请求头信息
httpPost.setHeader("Content-Type", "application/x-www-form-urlencoded;charset=utf-8");
httpPost.setHeader("AT", "1");
return httpPost;
}
private String getResponseContent(HttpEntity entity) throws IOException {
String contentEncoding = null;
if (entity.getContentEncoding() != null) {
contentEncoding = entity.getContentEncoding().getValue();
Log.d(TAG, "encoding: " + contentEncoding);
}
InputStream input = entity.getContent();
// 处理压缩内容
if (contentEncoding != null && contentEncoding.equalsIgnoreCase("gzip")) {
input = new GZIPInputStream(entity.getContent());
} else if (contentEncoding != null && contentEncoding.equalsIgnoreCase("deflate")) {
Inflater inflater = new Inflater(true);
input = new InflaterInputStream(entity.getContent(), inflater);
}
// 读取响应内容
try {
InputStreamReader isr = new InputStreamReader(input);
BufferedReader br = new BufferedReader(isr);
StringBuilder sb = new StringBuilder();
while (true) {
String buff = br.readLine();
if (buff == null) {
return sb.toString();
}
sb = sb.append(buff);
}
} finally {
input.close();
}
}
private JSONObject postRequest(JSONObject js) throws NetworkFailureException {
// 登录状态检查
if (!mLoggedin) {
Log.e(TAG, "please login first");
throw new ActionFailureException("not logged in");
}
HttpPost httpPost = createHttpPost();
try {
// 构建POST参数
LinkedList<BasicNameValuePair> list = new LinkedList<BasicNameValuePair>();
list.add(new BasicNameValuePair("r", js.toString()));
UrlEncodedFormEntity entity = new UrlEncodedFormEntity(list, "UTF-8");
httpPost.setEntity(entity);
// 执行请求并处理响应
// execute the post
HttpResponse response = mHttpClient.execute(httpPost);
String jsString = getResponseContent(response.getEntity());
return new JSONObject(jsString);
} catch (ClientProtocolException e) {
Log.e(TAG, e.toString());
e.printStackTrace();
throw new NetworkFailureException("postRequest failed");
} catch (IOException e) {
Log.e(TAG, e.toString());
e.printStackTrace();
throw new NetworkFailureException("postRequest failed");
} catch (JSONException e) {
Log.e(TAG, e.toString());
e.printStackTrace();
throw new ActionFailureException("unable to convert response content to jsonobject");
} catch (Exception e) {
Log.e(TAG, e.toString());
e.printStackTrace();
throw new ActionFailureException("error occurs when posting request");
}
}
public void createTask(Task task) throws NetworkFailureException {
commitUpdate();
// 提交暂存的更新
try {
JSONObject jsPost = new JSONObject();
JSONArray actionList = new JSONArray();
// 构建创建动作
// action_list
actionList.put(task.getCreateAction(getActionId()));
jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, actionList);
// 添加客户端版本
// client_version
jsPost.put(GTaskStringUtils.GTASK_JSON_CLIENT_VERSION, mClientVersion);
// 发送请求并处理响应
// post
JSONObject jsResponse = postRequest(jsPost);
JSONObject jsResult = (JSONObject) jsResponse.getJSONArray(
GTaskStringUtils.GTASK_JSON_RESULTS).get(0);
task.setGid(jsResult.getString(GTaskStringUtils.GTASK_JSON_NEW_ID));
// 设置服务器生成ID
} catch (JSONException e) {
Log.e(TAG, e.toString());
e.printStackTrace();
throw new ActionFailureException("create task: handing jsonobject failed");
}
}
public void createTaskList(TaskList tasklist) throws NetworkFailureException {
commitUpdate();// 提交暂存的更新
try {
JSONObject jsPost = new JSONObject();
JSONArray actionList = new JSONArray();
// 构建创建动作
// action_list
actionList.put(tasklist.getCreateAction(getActionId()));
jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, actionList);
// 添加客户端版本
// client version
jsPost.put(GTaskStringUtils.GTASK_JSON_CLIENT_VERSION, mClientVersion);
// 发送请求并处理响应
// 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));// 设置服务器生成ID
} catch (JSONException e) {
Log.e(TAG, e.toString());
e.printStackTrace();
throw new ActionFailureException("create tasklist: handing jsonobject failed");
}
}
// 提交暂存的更新操作（批量执行队列中的更新）
public void commitUpdate() throws NetworkFailureException {
if (mUpdateArray != null) {
try {
JSONObject jsPost = new JSONObject();
// 设置操作列表字段（直接使用暂存的更新数组）
// action_list
jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, mUpdateArray);
// 添加客户端版本号
// client_version
jsPost.put(GTaskStringUtils.GTASK_JSON_CLIENT_VERSION, mClientVersion);
postRequest(jsPost);// 发送批量更新请求
mUpdateArray = null;// 清空更新队列
} catch (JSONException e) {
Log.e(TAG, e.toString());
e.printStackTrace();
throw new ActionFailureException("commit update: handing jsonobject failed");
}
}
}
// 向更新队列添加单个操作（自动处理批量限制）
public void addUpdateNode(Node node) throws NetworkFailureException {
if (node != null) {
// too many update items may result in an error
// set max to 10 items
// 限制更新队列最大长度为10（超过则先提交当前队列）
if (mUpdateArray != null && mUpdateArray.length() > 10) {
commitUpdate();// 提交当前队列// 初始化更新队列
}
if (mUpdateArray == null)// 初始化更新队列
mUpdateArray = new JSONArray();
// 添加节点的更新操作（调用Node对象生成操作JSON）
mUpdateArray.put(node.getUpdateAction(getActionId()));
}
}
// 移动任务到新位置（支持任务列表间移动和任务排序）
public void moveTask(Task task, TaskList preParent, TaskList curParent)
throws NetworkFailureException {
commitUpdate();// 先提交之前暂存的更新
try {
JSONObject jsPost = new JSONObject();
JSONArray actionList = new JSONArray();
JSONObject action = new JSONObject();// 创建移动操作JSON对象
// 设置操作类型为移动
// 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());
// 如果在同一任务列表内移动且非第一个任务，设置前置兄弟ID（用于排序）
if (preParent == curParent && task.getPriorSibling() != null) {
// 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());
}
// 设置源任务列表ID和目标父级ID（目标任务列表ID）
action.put(GTaskStringUtils.GTASK_JSON_SOURCE_LIST, preParent.getGid());
action.put(GTaskStringUtils.GTASK_JSON_DEST_PARENT, curParent.getGid());
// 如果跨任务列表移动，额外设置目标列表ID
if (preParent != curParent) {
// put the dest_list only if moving between tasklists
action.put(GTaskStringUtils.GTASK_JSON_DEST_LIST, curParent.getGid());
}
actionList.put(action); // 添加操作到列表
jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, actionList);
// client_version
// 添加客户端版本号
jsPost.put(GTaskStringUtils.GTASK_JSON_CLIENT_VERSION, mClientVersion);
postRequest(jsPost);// 发送移动请求
} catch (JSONException e) {
Log.e(TAG, e.toString());
e.printStackTrace();
throw new ActionFailureException("move task: handing jsonobject failed");
}
}
// 删除任务或任务列表（标记为删除并提交更新）
public void deleteNode(Node node) throws NetworkFailureException {
commitUpdate();// 先提交之前暂存的更新
try {
JSONObject jsPost = new JSONObject();
JSONArray actionList = new JSONArray();
// 标记节点为已删除
// action_list
node.setDeleted(true);
// 添加删除操作
actionList.put(node.getUpdateAction(getActionId()));
jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, actionList);
// 添加客户端版本号
// 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");
}
}
// 获取所有任务列表（从Google Tasks获取根任务列表数据）
public JSONArray getTaskLists() throws NetworkFailureException {
if (!mLoggedin) {// 未登录检查
Log.e(TAG, "please login first");
throw new ActionFailureException("not logged in");
}
try {
HttpGet httpGet = new HttpGet(mGetUrl);// 创建GET请求
HttpResponse response = null;
response = mHttpClient.execute(httpGet);
// 解析响应内容
// 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) {
jsString = resString.substring(begin + jsBegin.length(), end);
}
JSONObject js = new JSONObject(jsString);
// 提取任务列表数据
return js.getJSONObject("t").getJSONArray(GTaskStringUtils.GTASK_JSON_LISTS);
} catch (ClientProtocolException e) {
// HTTP协议异常
Log.e(TAG, e.toString());
e.printStackTrace();
throw new NetworkFailureException("gettasklists: httpget failed");
} catch (IOException e) {
// IO异常
Log.e(TAG, e.toString());
e.printStackTrace();
throw new NetworkFailureException("gettasklists: httpget failed");
} catch (JSONException e) {
// JSON解析异常
Log.e(TAG, e.toString());
e.printStackTrace();
throw new ActionFailureException("get task lists: handing jasonobject failed");
}
}
// 获取指定任务列表中的任务（支持获取未删除任务）
public JSONArray getTaskList(String listGid) throws NetworkFailureException {
commitUpdate();
try {
JSONObject jsPost = new JSONObject();
JSONArray actionList = new JSONArray();
JSONObject action = new JSONObject();
// 设置操作类型为获取所有任务
// 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);
action.put(GTaskStringUtils.GTASK_JSON_GET_DELETED, false);
actionList.put(action);// 添加操作到列表
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");
}
}
// 获取当前同步账户对象
public Account getSyncAccount() {
return mAccount;
}
// 重置更新队列（清空待提交的操作）
public void resetUpdateArray() {
mUpdateArray = null;
}
}
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