在 Android 中维护 cookie 会话 [英] Maintain cookie session in Android

问题描述

好的，我有一个 android 应用程序，其中包含一个表单、两个 EditText、一个微调器和一个登录按钮.用户从微调器中选择服务，输入他们的用户名和密码，然后单击登录.数据通过 POST 发送，返回响应，对其进行处理，启动新的 WebView，加载从响应生成的 html 字符串，并且我拥有用户选择的任何服务的主页.

Okay, I have an android application that has a form in it, two EditText, a spinner, and a login button. The user selects the service from the spinner, types in their user name and password, and clicks login. The data is sent via POST, a response is returned, it's handled, a new WebView is launched, the html string generated from the response is loaded, and I have the home page of whatever service the user selected.

这一切都很好.现在，当用户点击链接时，无法找到登录信息，页面要求用户再次登录.我的登录会话被丢弃在某个地方，我不确定如何将信息从控制我的应用程序主要部分的类传递到刚刚启动 webview 活动的类.

That's all well and good. Now, when the user clicks on a link, the login info can't be found, and the page asks the user to login again. My login session is being dropped somewhere, and I'm not certain how to pass the info from the class that controls the main part of my app to the class that just launches the webview activity.

表单登录按钮的 onClick 处理程序:

The onClick handler from the form login button:

private class FormOnClickListener implements View.OnClickListener {

    public void onClick(View v) {

        String actionURL, user, pwd, user_field, pwd_field;

        actionURL = "thePageURL";
        user_field = "username"; //this changes based on selections in a spinner
        pwd_field = "password"; //this changes based on selections in a spinner
        user = "theUserLogin";
        pwd = "theUserPassword";

        List<NameValuePair> myList = new ArrayList<NameValuePair>();
        myList.add(new BasicNameValuePair(user_field, user)); 
        myList.add(new BasicNameValuePair(pwd_field, pwd));

        HttpParams params = new BasicHttpParams();
        DefaultHttpClient client = new DefaultHttpClient(params);
        HttpPost post = new HttpPost(actionURL);
        HttpResponse response = null;
        BasicResponseHandler myHandler = new BasicResponseHandler();
        String endResult = null;

        try { post.setEntity(new UrlEncodedFormEntity(myList)); } 
        catch (UnsupportedEncodingException e) { e.printStackTrace(); } 

        try { response = client.execute(post); } 
        catch (ClientProtocolException e) { e.printStackTrace(); } 
        catch (IOException e) { e.printStackTrace(); }  

        try { endResult = myHandler.handleResponse(response); } 
        catch (HttpResponseException e) { e.printStackTrace(); } 
        catch (IOException e) { e.printStackTrace(); }

        List<Cookie> cookies = client.getCookieStore().getCookies();
        if (!cookies.isEmpty()) {
            for (int i = 0; i < cookies.size(); i++) {
                cookie = cookies.get(i);
            }
        }

       Intent myWebViewIntent = new Intent(MsidePortal.this, MyWebView.class);
       myWebViewIntent.putExtra("htmlString", endResult);
       myWebViewIntent.putExtra("actionURL", actionURL);
       startActivity(myWebViewIntent);
    }
}

这里是处理响应显示的 WebView 类:

And here is the WebView class that handles the response display:

public class MyWebView extends android.app.Activity {

    private class MyWebViewClient extends WebViewClient {

        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            view.loadUrl(url);
            return true;
        }
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.web);

        MyWebViewClient myClient = new MyWebViewClient();
        WebView webview = (WebView)findViewById(R.id.mainwebview);
        webview.getSettings().setBuiltInZoomControls(true); 
        webview.getSettings().setJavaScriptEnabled(true); 
        webview.setWebViewClient(myClient);

        Bundle extras = getIntent().getExtras();
        if(extras != null) 
        {
            // Get endResult
            String htmlString = extras.getString("htmlString");
            String actionURL = extras.getString("actionURL");

            Cookie sessionCookie = MsidePortal.cookie;
            CookieSyncManager.createInstance(this);
            CookieManager cookieManager = CookieManager.getInstance();
            if (sessionCookie != null) {
                cookieManager.removeSessionCookie();
                String cookieString = sessionCookie.getName()
                        + "=" + sessionCookie.getValue()
                        + "; domain=" + sessionCookie.getDomain();
                cookieManager.setCookie(actionURL, cookieString);
                CookieSyncManager.getInstance().sync();
            }  

            webview.loadDataWithBaseURL(actionURL, htmlString, "text/html", "utf-8", actionURL);}
        }
    }
}

我在实施该 cookie 解决方案方面取得了不同的成功.它似乎适用于我登录的一项服务，我知道我知道将 cookie 保留在服务器上(旧的、过时的，但它可以工作并且他们不想更改它.)我现在尝试的服务要求用户保留cookie 在他们的本地机器上，并且它不适用于此设置.

I've had mixed success implementing that cookie solution. It seems to work for one service I log into that I know keeps the cookies on the server (old, archaic, but it works and they don't want to change it.) The service I'm attempting now requires the user to keep cookies on their local machine, and it does not work with this setup.

有什么建议吗?

推荐答案

您需要保持 cookie 从一个调用到另一个调用.使用此构建器，而不是创建新的 DefaultHttpClient:

You need to keep the cookie from one call to another. Instead of creating a new DefaultHttpClient, use this builder:

private Object mLock = new Object();
private CookieStore mCookie = null;
/**
 * Builds a new HttpClient with the same CookieStore than the previous one.
 * This allows to follow the http session, without keeping in memory the
 * full DefaultHttpClient.
 * @author Régis Décamps <[e-mail]>
 */
private HttpClient getHttpClient() {
        final DefaultHttpClient httpClient = new DefaultHttpClient();
        synchronized (mLock) {
                if (mCookie == null) {
                        mCookie = httpClient.getCookieStore();
                } else {
                        httpClient.setCookieStore(mCookie);
                }
        }
        return httpClient;
}

并将 Builder 类保留为应用程序的一个字段.

And keep the Builder class as a field of your application.

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