Java tutorial
/* * Copyright (c) 2015 - Qeo LLC * * The source code form of this Qeo Open Source Project component is subject * to the terms of the Clear BSD license. * * You can redistribute it and/or modify it under the terms of the Clear BSD * License (http://directory.fsf.org/wiki/License:ClearBSD). See LICENSE file * for more details. * * The Qeo Open Source Project also includes third party Open Source Software. * See LICENSE file for more details. */ package org.qeo.deviceregistration.ui; import java.util.HashMap; import java.util.Map; import java.util.logging.Logger; import java.util.regex.Matcher; import java.util.regex.Pattern; import org.qeo.android.security.OtcActivity; import org.qeo.android.service.QeoDefaults; import org.qeo.android.service.ServiceApplication; import org.qeo.android.service.ui.BuildConfig; import org.qeo.android.service.ui.R; import org.qeo.deviceregistration.DeviceRegPref; import org.qeo.deviceregistration.QeoManagementApp; import org.qeo.deviceregistration.rootresource.LoadResourcesService; import org.qeo.deviceregistration.service.OAuthTokenService; import android.annotation.SuppressLint; import android.app.AlertDialog; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.net.Uri; import android.net.http.SslError; import android.os.Bundle; import android.support.v4.content.LocalBroadcastManager; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.webkit.SslErrorHandler; import android.webkit.WebView; import android.webkit.WebViewClient; import android.widget.Toast; import com.actionbarsherlock.app.SherlockFragment; import com.actionbarsherlock.view.Menu; import com.actionbarsherlock.view.MenuInflater; import com.actionbarsherlock.view.MenuItem; /** Fragment for the webview. */ public class WebviewFragment extends SherlockFragment { private static final Logger LOG = Logger.getLogger("WebViewFragment"); private WebView mWebView; private Pattern mPatternQueryParameter; private WebViewActivity mActivity; private Bundle mWebviewState; private ResourcesBroadcastReceiver mResourcesBroadcastReceiver; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setRetainInstance(true); QeoManagementApp.init(); // Initialize global variables mWebviewState = null; mActivity = (WebViewActivity) getActivity(); // register receiver for root resource loader IntentFilter intentFilter = new IntentFilter(LoadResourcesService.ACTION_LOADING_DONE); mResourcesBroadcastReceiver = new ResourcesBroadcastReceiver(); LocalBroadcastManager.getInstance(mActivity).registerReceiver(mResourcesBroadcastReceiver, intentFilter); Intent intentService = new Intent(getActivity(), LoadResourcesService.class); intentService.putExtra(LoadResourcesService.INTENT_ROOT_URL, DeviceRegPref.getScepServerURL()); getActivity().startService(intentService); mActivity.setProgressBarIndeterminateVisibility(true); mActivity.setSupportProgressBarIndeterminateVisibility(true); setHasOptionsMenu(true); } @Override public void onDestroy() { if (mResourcesBroadcastReceiver != null) { LocalBroadcastManager.getInstance(mActivity).unregisterReceiver(mResourcesBroadcastReceiver); mResourcesBroadcastReceiver = null; } super.onDestroy(); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.fragment_webview, container, false); mActivity = (WebViewActivity) getActivity(); mPatternQueryParameter = Pattern.compile("^(.*)=(.*)$"); mWebView = (WebView) rootView.findViewById(R.id.webViewAuthentication); initWebview(); if (mWebviewState != null) { LOG.fine("restoring webview"); mWebView.restoreState(mWebviewState); mWebviewState = null; } return rootView; } @SuppressWarnings("deprecation") @SuppressLint("SetJavaScriptEnabled") private void initWebview() { LOG.fine("initWebview"); mWebView.getSettings().setSupportZoom(true); mWebView.getSettings().setBuiltInZoomControls(true); mWebView.setScrollBarStyle(View.SCROLLBARS_OUTSIDE_OVERLAY); mWebView.setScrollbarFadingEnabled(true); mWebView.getSettings().setLoadsImagesAutomatically(true); mWebView.getSettings().setJavaScriptEnabled(true); mWebView.getSettings().setAllowFileAccess(false); // don't save passwords or form data mWebView.getSettings().setSaveFormData(false); mWebView.getSettings().setSavePassword(false); // Load the URLs inside the mWebView, not in the external web browser mWebView.setWebViewClient(new OpenIdWebviewClient()); } private void loadDefaultUrl() { mActivity.setProgressBarIndeterminateVisibility(true); mActivity.setSupportProgressBarIndeterminateVisibility(true); // Load login page loadOpenIdPage(DeviceRegPref.getAuthorizationUrl()); } private void loadOpenIdPage(String openIdUrl) { LOG.fine("Using openId url " + openIdUrl); Uri.Builder builder = Uri.parse(openIdUrl).buildUpon(); builder.appendQueryParameter("response_type", "code"); builder.appendQueryParameter("client_id", ServiceApplication.getMetaData(ServiceApplication.META_DATA_QEO_CLIENT_ID)); builder.appendQueryParameter("redirect_uri", QeoDefaults.getOpenIdRedirectUrl()); Uri uri = builder.build(); LOG.fine("Load url " + uri.toString()); mWebView.loadUrl(uri.toString()); } @Override public void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); mWebviewState = new Bundle(); // Save the state of the mWebView mWebView.saveState(mWebviewState); } @Override public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { if (mActivity.isOtcEnabled()) { LOG.fine("Enable OTC button"); // Inflate the menu items for use in the action bar inflater.inflate(R.menu.webview_menu, menu); } } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle presses on the action bar items if (item.getItemId() == R.id.OTC_Login) { // the user chooses to enter OTC / scan QR mActivity.setOtcStarted(true); startActivity(new Intent(getActivity(), OtcActivity.class)); return true; } return super.onOptionsItemSelected(item); } /** * Creates a Map from the query string included in the URL. * * @param query the query string. * @return a map with key value pairs from the query string. */ private Map<String, String> getQueryMap(String query) { String[] params = query.split("&"); Map<String, String> map = new HashMap<String, String>(); for (String param : params) { Matcher m = mPatternQueryParameter.matcher(param); if (m.matches()) { map.put(m.group(1), m.group(2)); } } return map; } /** OpenId login OK. */ private void openOAuthReceived(String code) { LOG.fine("Got OAuth code, starting OAuthTokenService"); // start the oauth service Intent i = new Intent(mActivity.getApplicationContext(), OAuthTokenService.class); i.putExtra(OAuthTokenService.INTENT_EXTRA_OAUTH_CODE, code); mActivity.startService(i); } /** OpenId login failed. */ private void codeFailed() { mActivity.broadcastError("Error in openId login"); // Close down this mWebView. mActivity.finish(); } /** * Try if the webview can go back. * @return True if the webview did go back, false if there is no backstate. */ public boolean tryGoBack() { if (mWebView.canGoBack()) { mWebView.goBack(); return true; } else { return false; } } // ///////////////////// // helper classes // ///////////////////// private class ResourcesBroadcastReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { String errorMessage = intent.getStringExtra(LoadResourcesService.INTENT_EXTRA_ERROR_MESSAGE); LocalBroadcastManager.getInstance(getActivity()).unregisterReceiver(this); if (errorMessage == null || errorMessage.isEmpty()) { // load ok loadDefaultUrl(); } else { LOG.warning("Error fetching root resource: " + DeviceRegPref.getScepServerURL() + " -- " + errorMessage); Toast.makeText(getActivity(), getString(R.string.get_resource_error_msg) + " " + errorMessage, Toast.LENGTH_LONG).show(); } } } private class OpenIdWebviewClient extends WebViewClient { @Override public boolean shouldOverrideUrlLoading(WebView view, String url) { Uri uri = Uri.parse(url); LOG.fine("Got webview url " + uri); // Gets the Query String from the URL if one is available. String q = uri.getQuery(); // When it has no Query string, we can just ignore it and let // the normal URL handling take care of it. We are sure it does // not contain a Authorization Code then. if (q != null) { // If the url matches the redirect url we don't want the // mWebView to actually load the page. Instead we catch this // request and extract the Authorization Code from the // query. It is passed back to the Activity by the // OauthCallback. if (url.startsWith(QeoDefaults.getOpenIdRedirectUrl())) { LOG.fine("Intercept openId resultPage"); Map<String, String> params = getQueryMap(q); String code = params.get("code"); LOG.fine("code: " + code); if (code != null && !code.isEmpty()) { // openId login finished openOAuthReceived(code); } else { LOG.warning("Error in openId handling: " + url); codeFailed(); } return true; // handling overruled } } else { mActivity.setProgressBarIndeterminateVisibility(true); mActivity.setSupportProgressBarIndeterminateVisibility(true); } // Normal URL Handling applies here. return super.shouldOverrideUrlLoading(view, url); } @Override public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) { if (!QeoDefaults.isAllowSelfSignedCertificate()) { // default implementation AlertDialog.Builder builder = new AlertDialog.Builder(getActivity()); builder.setMessage(getString(R.string.certificate_error)); builder.setPositiveButton(android.R.string.ok, null); builder.show(); LOG.warning("Certificate error: " + error.toString()); super.onReceivedSslError(view, handler, error); } else { // Workaround for Self Signed certificates. By default the // WebView will not load pages that are not trusted. We override // it by telling it to proceed when an error occurs. handler.proceed(); } } @Override public void onPageFinished(WebView view, String url) { LOG.fine("page load finished"); mActivity.setProgressBarIndeterminateVisibility(false); mActivity.setSupportProgressBarIndeterminateVisibility(false); if (BuildConfig.DEBUG) { // UIautomator uses this, don't remove it. Only print on debug LOG.info("loaded url [" + url + "]"); } } } }