Different approach to auto signin.

On startup, attempt to log the user into google sites.  Show a progress dialog
that the user can cancel if login takes too long.

Add a new preference for toggling auto signin.  This preference shows the
current account and allows the user to choose the account to use.  If there are
no accounts, the option is disabled.  The saved account is validated each time
it is accessed in case the account was removed.

Bug: 3278072
Change-Id: I10ce1dc57a683b2820b17ef6955577037c82f332

1 files changed, 199 insertions, 0 deletions

diff --git a/src/com/android/browser/GoogleAccountLogin.java b/src/com/android/browser/GoogleAccountLogin.java
new file mode 100644
index 000000000..8ff09727d
--- /dev/null
+++ b/src/com/android/browser/GoogleAccountLogin.java
@@ -0,0 +1,199 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * 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 com.android.browser;
+
+import org.apache.http.Header;
+import org.apache.http.HeaderIterator;
+import org.apache.http.HttpEntity;
+import org.apache.http.HttpResponse;
+import org.apache.http.HttpStatus;
+import org.apache.http.client.methods.HttpPost;
+import org.apache.http.util.EntityUtils;
+
+import android.accounts.Account;
+import android.accounts.AccountManager;
+import android.accounts.AccountManagerCallback;
+import android.accounts.AccountManagerFuture;
+import android.app.Activity;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.DialogInterface.OnCancelListener;
+import android.net.http.AndroidHttpClient;
+import android.net.Uri;
+import android.os.Bundle;
+import android.webkit.WebView;
+import android.webkit.WebViewClient;
+
+import java.util.ArrayList;
+
+public class GoogleAccountLogin extends Thread implements
+        AccountManagerCallback<Bundle>, OnCancelListener {
+
+    // Url for issuing the uber token.
+    private Uri ISSUE_AUTH_TOKEN_URL = Uri.parse(
+            "https://www.google.com/accounts/IssueAuthToken?service=gaia&Session=false");
+    // Url for signing into a particular service.
+    private final static Uri TOKEN_AUTH_URL = Uri.parse(
+            "https://www.google.com/accounts/TokenAuth");
+    // Google account type
+    private final static String GOOGLE = "com.google";
+
+    private final Activity mActivity;
+    private final Account mAccount;
+    private final WebView mWebView;
+    private Runnable mRunnable;
+
+    // SID and LSID retrieval process.
+    private String mSid;
+    private String mLsid;
+    private int mState;  // {NONE(0), SID(1), LSID(2)}
+
+    GoogleAccountLogin(Activity activity, String name) {
+        mActivity = activity;
+        mAccount = new Account(name, GOOGLE);
+        mWebView = new WebView(mActivity);
+        mWebView.setWebViewClient(new WebViewClient() {
+            @Override
+            public boolean shouldOverrideUrlLoading(WebView view, String url) {
+                return false;
+            }
+            @Override
+            public void onPageFinished(WebView view, String url) {
+                done();
+            }
+        });
+    }
+
+    // Thread
+    @Override
+    public void run() {
+        String url = ISSUE_AUTH_TOKEN_URL.buildUpon()
+                .appendQueryParameter("SID", mSid)
+                .appendQueryParameter("LSID", mLsid)
+                .build().toString();
+        // Intentionally not using Proxy.
+        AndroidHttpClient client = AndroidHttpClient.newInstance(
+                mWebView.getSettings().getUserAgentString());
+        HttpPost request = new HttpPost(url);
+
+        String result = null;
+        try {
+            HttpResponse response = client.execute(request);
+            if (response.getStatusLine().getStatusCode() != HttpStatus.SC_OK) {
+                done();
+                return;
+            }
+            HttpEntity entity = response.getEntity();
+            if (entity == null) {
+                done();
+                return;
+            }
+            result = EntityUtils.toString(entity, "UTF-8");
+        } catch (Exception e) {
+            request.abort();
+            done();
+            return;
+        } finally {
+            client.close();
+        }
+        final String newUrl = TOKEN_AUTH_URL.buildUpon()
+                .appendQueryParameter("source", "android-browser")
+                .appendQueryParameter("auth", result)
+                .appendQueryParameter("continue",
+                        BrowserSettings.getFactoryResetHomeUrl(mActivity))
+                .build().toString();
+        mActivity.runOnUiThread(new Runnable() {
+            @Override public void run() {
+                mWebView.loadUrl(newUrl);
+            }
+        });
+    }
+
+    // AccountManager callbacks.
+    @Override
+    public void run(AccountManagerFuture<Bundle> value) {
+        try {
+            String id = value.getResult().getString(
+                    AccountManager.KEY_AUTHTOKEN);
+            switch (mState) {
+                default:
+                case 0:
+                    throw new IllegalStateException(
+                            "Impossible to get into this state");
+                case 1:
+                    mSid = id;
+                    mState = 2;  // LSID
+                    AccountManager.get(mActivity).getAuthToken(
+                            mAccount, "LSID", null, mActivity, this, null);
+                    break;
+                case 2:
+                    mLsid = id;
+                    this.start();
+                    break;
+            }
+        } catch (Exception e) {
+            // For all exceptions load the original signin page.
+            // TODO: toast login failed?
+            done();
+        }
+    }
+
+    public void startLogin(Runnable runnable) {
+        mRunnable = runnable;
+        mState = 1;  // SID
+        AccountManager.get(mActivity).getAuthToken(
+                mAccount, "SID", null, mActivity, this, null);
+    }
+
+    // Returns the account name passed in if the account exists, otherwise
+    // returns the default account.
+    public static String validateAccount(Context ctx, String name) {
+        Account[] accounts = getAccounts(ctx);
+        if (accounts.length == 0) {
+            return null;
+        }
+        if (name != null) {
+            // Make sure the account still exists.
+            for (Account a : accounts) {
+                if (a.name.equals(name)) {
+                    return name;
+                }
+            }
+        }
+        // Return the first entry.
+        return accounts[0].name;
+    }
+
+    public static Account[] getAccounts(Context ctx) {
+        return AccountManager.get(ctx).getAccountsByType(GOOGLE);
+    }
+
+    // Used to indicate that the Browser should continue loading the main page.
+    // This can happen on success, error, or timeout.
+    private synchronized void done() {
+        if (mRunnable != null) {
+            mActivity.runOnUiThread(mRunnable);
+            mRunnable = null;
+            mWebView.destroy();
+        }
+    }
+
+    // Called by the progress dialog on startup.
+    public void onCancel(DialogInterface unused) {
+        done();
+    }
+}