1 files changed, 238 insertions, 0 deletions
diff --git a/src/com/android/browser/UrlHandler.java b/src/com/android/browser/UrlHandler.java
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+/*
+ * 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 android.app.Activity;
+import android.content.ActivityNotFoundException;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.database.Cursor;
+import android.net.Uri;
+import android.util.Log;
+import android.webkit.WebView;
+
+import java.net.URISyntaxException;
+
+/**
+ *
+ */
+public class UrlHandler {
+
+    // Use in overrideUrlLoading
+    /* package */ final static String SCHEME_WTAI = "wtai://wp/";
+    /* package */ final static String SCHEME_WTAI_MC = "wtai://wp/mc;";
+    /* package */ final static String SCHEME_WTAI_SD = "wtai://wp/sd;";
+    /* package */ final static String SCHEME_WTAI_AP = "wtai://wp/ap;";
+
+    Controller mController;
+    Activity mActivity;
+
+    private Boolean mIsProviderPresent = null;
+    private Uri mRlzUri = null;
+
+    public UrlHandler(Controller controller) {
+        mController = controller;
+        mActivity = mController.getActivity();
+    }
+
+    boolean shouldOverrideUrlLoading(WebView view, String url) {
+        if (view.isPrivateBrowsingEnabled()) {
+            // Don't allow urls to leave the browser app when in
+            // private browsing mode
+            mController.loadUrl(view, url);
+            return true;
+        }
+
+        if (url.startsWith(SCHEME_WTAI)) {
+            // wtai://wp/mc;number
+            // number=string(phone-number)
+            if (url.startsWith(SCHEME_WTAI_MC)) {
+                Intent intent = new Intent(Intent.ACTION_VIEW,
+                        Uri.parse(WebView.SCHEME_TEL +
+                        url.substring(SCHEME_WTAI_MC.length())));
+                mActivity.startActivity(intent);
+                // before leaving BrowserActivity, close the empty child tab.
+                // If a new tab is created through JavaScript open to load this
+                // url, we would like to close it as we will load this url in a
+                // different Activity.
+                mController.closeEmptyChildTab();
+                return true;
+            }
+            // wtai://wp/sd;dtmf
+            // dtmf=string(dialstring)
+            if (url.startsWith(SCHEME_WTAI_SD)) {
+                // TODO: only send when there is active voice connection
+                return false;
+            }
+            // wtai://wp/ap;number;name
+            // number=string(phone-number)
+            // name=string
+            if (url.startsWith(SCHEME_WTAI_AP)) {
+                // TODO
+                return false;
+            }
+        }
+
+        // The "about:" schemes are internal to the browser; don't want these to
+        // be dispatched to other apps.
+        if (url.startsWith("about:")) {
+            return false;
+        }
+
+        // If this is a Google search, attempt to add an RLZ string
+        // (if one isn't already present).
+        if (rlzProviderPresent()) {
+            Uri siteUri = Uri.parse(url);
+            if (needsRlzString(siteUri)) {
+                String rlz = null;
+                Cursor cur = null;
+                try {
+                    cur = mActivity.getContentResolver()
+                            .query(getRlzUri(), null, null, null, null);
+                    if (cur != null && cur.moveToFirst() && !cur.isNull(0)) {
+                        url = siteUri.buildUpon()
+                                     .appendQueryParameter("rlz", cur.getString(0))
+                                     .build().toString();
+                    }
+                } finally {
+                    if (cur != null) {
+                        cur.close();
+                    }
+                }
+                mController.loadUrl(view, url);
+                return true;
+            }
+        }
+
+        Intent intent;
+        // perform generic parsing of the URI to turn it into an Intent.
+        try {
+            intent = Intent.parseUri(url, Intent.URI_INTENT_SCHEME);
+        } catch (URISyntaxException ex) {
+            Log.w("Browser", "Bad URI " + url + ": " + ex.getMessage());
+            return false;
+        }
+
+        // check whether the intent can be resolved. If not, we will see
+        // whether we can download it from the Market.
+        if (mActivity.getPackageManager().resolveActivity(intent, 0) == null) {
+            String packagename = intent.getPackage();
+            if (packagename != null) {
+                intent = new Intent(Intent.ACTION_VIEW, Uri
+                        .parse("market://search?q=pname:" + packagename));
+                intent.addCategory(Intent.CATEGORY_BROWSABLE);
+                mActivity.startActivity(intent);
+                // before leaving BrowserActivity, close the empty child tab.
+                // If a new tab is created through JavaScript open to load this
+                // url, we would like to close it as we will load this url in a
+                // different Activity.
+                mController.closeEmptyChildTab();
+                return true;
+            } else {
+                return false;
+            }
+        }
+
+        // sanitize the Intent, ensuring web pages can not bypass browser
+        // security (only access to BROWSABLE activities).
+        intent.addCategory(Intent.CATEGORY_BROWSABLE);
+        intent.setComponent(null);
+        try {
+            if (mActivity.startActivityIfNeeded(intent, -1)) {
+                // before leaving BrowserActivity, close the empty child tab.
+                // If a new tab is created through JavaScript open to load this
+                // url, we would like to close it as we will load this url in a
+                // different Activity.
+                mController.closeEmptyChildTab();
+                return true;
+            }
+        } catch (ActivityNotFoundException ex) {
+            // ignore the error. If no application can handle the URL,
+            // eg about:blank, assume the browser can handle it.
+        }
+
+        if (mController.isMenuDown()) {
+            mController.openTab(url, false);
+            mActivity.closeOptionsMenu();
+            return true;
+        }
+        return false;
+    }
+
+    // Determine whether the RLZ provider is present on the system.
+    private boolean rlzProviderPresent() {
+        if (mIsProviderPresent == null) {
+            PackageManager pm = mActivity.getPackageManager();
+            mIsProviderPresent = pm.resolveContentProvider(
+                    BrowserSettings.RLZ_PROVIDER, 0) != null;
+        }
+        return mIsProviderPresent;
+    }
+
+    // Retrieve the RLZ access point string and cache the URI used to
+    // retrieve RLZ values.
+    private Uri getRlzUri() {
+        if (mRlzUri == null) {
+            String ap = mActivity.getResources()
+                    .getString(R.string.rlz_access_point);
+            mRlzUri = Uri.withAppendedPath(BrowserSettings.RLZ_PROVIDER_URI, ap);
+        }
+        return mRlzUri;
+    }
+
+    // Determine if this URI appears to be for a Google search
+    // and does not have an RLZ parameter.
+    // Taken largely from Chrome source, src/chrome/browser/google_url_tracker.cc
+    private static boolean needsRlzString(Uri uri) {
+        String scheme = uri.getScheme();
+        if (("http".equals(scheme) || "https".equals(scheme)) &&
+            (uri.getQueryParameter("q") != null) &&
+                    (uri.getQueryParameter("rlz") == null)) {
+            String host = uri.getHost();
+            if (host == null) {
+                return false;
+            }
+            String[] hostComponents = host.split("\\.");
+
+            if (hostComponents.length < 2) {
+                return false;
+            }
+            int googleComponent = hostComponents.length - 2;
+            String component = hostComponents[googleComponent];
+            if (!"google".equals(component)) {
+                if (hostComponents.length < 3 ||
+                        (!"co".equals(component) && !"com".equals(component))) {
+                    return false;
+                }
+                googleComponent = hostComponents.length - 3;
+                if (!"google".equals(hostComponents[googleComponent])) {
+                    return false;
+                }
+            }
+
+            // Google corp network handling.
+            if (googleComponent > 0 && "corp".equals(
+                    hostComponents[googleComponent - 1])) {
+                return false;
+            }
+
+            return true;
+        }
+        return false;
+    }
+
+}