android的cas客戶端demo開發

周六的時候去參觀了36小時編程比賽現場， 氣氛很是激烈， 裡面有一個團隊要做了一個移動應用，需要接入公司內域賬號登錄，可是最終頁沒有接入。聯想到我做的就是cas啊，這方面我比較熟悉啊， 隨著使用域賬號登錄公司內賬號的場景增多，為什麼不寫一個demo呢。
說干就干， 周六晚上回到住處就開始了我的“36小時”編程。
首先，思考一下整體思路，其實cas的整體流程還算比較簡單，我只需要將在浏覽器中的整個流程在android上面實現即可，於是一頓狂寫，主要如下：

package com.glodon.cas.model;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;

public class GlodonCas {
        private static DefaultHttpClient  httpClient = new DefaultHttpClient();
        private static boolean casLogined = false;
        public final static String CAS_DOMAIN = "http://cas.grandsoft.com.cn";
        public String appCallback = null;
        private boolean isLogined = false;

        public GlodonCas(String appCallback) {
                this.appCallback = appCallback;
        }

        public boolean login(String username, String password) throws Exception {

                String service = appCallback;
                String lt = getLt();
                String loginApi = CAS_DOMAIN + "/login";
                String params = "username=" + URLEncoder.encode(username)
                                + "&password=" + URLEncoder.encode(password) + "&lt="
                                + URLEncoder.encode(lt) + "&service=" + service;
                byte[] entitydata = params.getBytes();
                HttpURLConnection c = (HttpURLConnection) new URL(loginApi)
                                .openConnection();
                c.setInstanceFollowRedirects(false);
                c.setRequestMethod("POST");
                c.setDoOutput(true);
                c.setRequestProperty("Content-Type",
                                "application/x-www-form-urlencoded");
                c.setRequestProperty("Content-Length",
                                String.valueOf(entitydata.length));
                OutputStream outStream = c.getOutputStream();
                outStream.write(entitydata);
                outStream.flush();
                outStream.close();
                int responeCode = -1;
                try {
                        responeCode = c.getResponseCode();
                } catch (java.io.IOException e) {
                        if (e.getMessage().contains("authentication challenge")) {
                                responeCode = 401;
                        } else {
                                throw e;
                        }
                }
                if (responeCode == 303) {
                        get(c.getHeaderField("Location"));
                        isLogined = true;
                        casLogined = true;
                        return true;
                } else {
                        isLogined = false;
                        casLogined = true;
                        return false;
                }
        }

        public boolean isLogined() {
                return isLogined;
        }

        public static boolean casLogined() {
                return casLogined;
        }

        public static DefaultHttpClient  getHttpClient() {
                return httpClient;
        }

        private static String getLt() throws IOException {
                String httpUrl = CAS_DOMAIN + "/loginTicket";
                HttpPost httpPost = new HttpPost(httpUrl);
                HttpResponse httpRespone = httpClient.execute(httpPost);
                HttpEntity httpEntity = httpRespone.getEntity();
                InputStream inputStream = httpEntity.getContent();
                BufferedReader reader = new BufferedReader(new InputStreamReader(
                                inputStream));
                String str = "";
                String line = null;
                while ((line = reader.readLine()) != null) {
                        str += line;
                }
                return str;
        }

        private static String get(String httpUrl) throws Exception {
                HttpGet httpGet = new HttpGet(httpUrl);
                InputStream inputStream = null;
                String bodyStr = "";
                HttpResponse httpRespone = httpClient.execute(httpGet);
                HttpEntity httpEntity = httpRespone.getEntity();
                inputStream = httpEntity.getContent();
                BufferedReader reader = new BufferedReader(new InputStreamReader(
                                inputStream));
                String line = "";
                while ((line = reader.readLine()) != null) {
                        bodyStr += line;
                }
                return bodyStr;
        }
}

在加上activity的一些控制代碼，最終終於跑通了。
現在想想應該還缺一個應用內浏覽器組件顯示網頁的問題，思路比較簡單：只需要從httpclient中獲取登錄後的cookie，然後植入浏覽器組件webview中就行了。於是google一下，很快找到相關代碼，復制粘貼，修改， 加個刷新按鈕，ok，搞定。

package com.glodon.cas.activities;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.List;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.cookie.Cookie;

import android.app.Activity;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
import android.webkit.CookieManager;
import android.webkit.CookieSyncManager;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

import com.glodon.cas.model.GlodonCas;

public class MainActivity extends Activity {
        private Button btnGetThinkList;
        private static int LOGIN_REQUEST_CODE = 1;
        private TextView tvThinkList;
        private WebView webView;
        private Button btnRefresh;

        @Override
        protected void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                setContentView(R.layout.activity_main);
                btnGetThinkList = (Button) findViewById(R.id.btnGetThinkList);
                tvThinkList = (TextView) findViewById(R.id.tvThinkList);
                webView = (WebView) findViewById(R.id.webView);
                btnGetThinkList.setOnClickListener(new View.OnClickListener() {

                        @Override
                        public void onClick(View v) {
                                if (!GlodonCas.casLogined()) {
                                        startActivityForResult(new Intent(MainActivity.this,
                                                        LoginActivity.class), LOGIN_REQUEST_CODE);
                                        return;
                                }

                                new ThinkListTask().execute();

                        }
                });
                webView.getSettings().setJavaScriptEnabled(true);
                webView.setWebViewClient(new WebViewClient() {
                        public boolean shouldOverrideUrlLoading(WebView view, String url) {
                                view.loadUrl(url);
                                return false;
                        }
                });
                webView.loadUrl("http://think.grandsoft.com.cn");
                btnRefresh = (Button) findViewById(R.id.btnRefresh);
                btnRefresh.setOnClickListener(new View.OnClickListener() {

                        @Override
                        public void onClick(View v) {
                                List cookies = GlodonCas.getHttpClient()
                                                .getCookieStore().getCookies();
                                if (!cookies.isEmpty()) {
                                        Cookie sessionCookie = null;
                                        for (int i = 0; i < cookies.size(); i++) {
                                                sessionCookie = cookies.get(i);

                                        }
                                        CookieSyncManager.createInstance(MainActivity.this);
                                        CookieManager cookieManager = CookieManager.getInstance();
                                        if (sessionCookie != null) {
                                                cookieManager.removeSessionCookie();
                                                String cookieString = sessionCookie.getName() + "="
                                                                + sessionCookie.getValue() + "; domain="
                                                                + sessionCookie.getDomain();
                                                cookieManager.setCookie("think.grandsoft.com.cn",
                                                                cookieString);
                                                CookieSyncManager.getInstance().sync();
                                        }
                                        System.out.println("finish");
                                        webView.loadUrl("http://think.grandsoft.com.cn");
                                }
                        }
                });
        }

        @Override
        protected void onActivityResult(int requestCode, int resultCode, Intent data) {
                if (requestCode == LOGIN_REQUEST_CODE) {
                        Toast.makeText(this, R.string.login_success, Toast.LENGTH_LONG)
                                        .show();
                }
        }

        class ThinkListTask extends AsyncTask {

                @Override
                protected String doInBackground(Void... params) {
                        try {
                                HttpGet httpGet = new HttpGet(
                                                "http://think.grandsoft.com.cn/api/weekly_journals");
                                HttpClient httpClient = GlodonCas.getHttpClient();
                                HttpResponse httpRespone = httpClient.execute(httpGet);
                                StringBuilder sb = new StringBuilder();
                                HttpEntity httpEntity = httpRespone.getEntity();
                                InputStream inputStream = httpEntity.getContent();
                                BufferedReader reader = new BufferedReader(
                                                new InputStreamReader(inputStream));
                                String line = "";
                                while ((line = reader.readLine()) != null) {
                                        sb.append(line);
                                }
                                return sb.toString();
                        } catch (Exception e) {
                                e.printStackTrace();
                                return null;
                        }
                }

                @Override
                protected void onPostExecute(String thinkList) {
                        tvThinkList.setText(thinkList);
                }

        }

}

package com.glodon.cas.activities;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;

import android.app.Activity;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import com.glodon.cas.model.GlodonCas;

public class LoginActivity extends Activity {
        private static Button btnLogin;
        private static EditText etUsername;
        private static EditText etPassword;

        @Override
        protected void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                setContentView(R.layout.activity_login);

                btnLogin = (Button) findViewById(R.id.btnLogin);
                etUsername = (EditText) findViewById(R.id.etUsername);
                etPassword = (EditText) findViewById(R.id.etPassword);
                btnLogin.setOnClickListener(new View.OnClickListener() {

                        @Override
                        public void onClick(View v) {
                                new LoginTask().execute(etUsername.getText().toString(),
                                                etPassword.getText().toString());

                        }
                });
        }

        public class LoginTask extends AsyncTask {

                @Override
                protected Boolean doInBackground(String... args) {
                        try {
                                return new GlodonCas("http://think.grandsoft.com.cn")
                                                .login(args[0], args[1]);
                        } catch (Exception e) {
                                e.printStackTrace();
                        }
                        return null;

                }

                @Override
                protected void onPostExecute(Boolean login_success) {
                        if (login_success == null) {
                                Toast.makeText(LoginActivity.this, R.string.network_error_tip,
                                                Toast.LENGTH_LONG).show();
                                return;
                        }
                        if (login_success) {
                                Intent intent = new Intent();
                                LoginActivity.this.setResult(RESULT_OK, intent);
                                LoginActivity.this.finish();
                        } else {
                                Toast.makeText(LoginActivity.this, R.string.login_error_tip,
                                                Toast.LENGTH_LONG).show();
                        }
                }

        }

}