src/com/android/browser/DownloadHandler.java - platform/packages/apps/Browser - Git at Google

 /*
  * 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.app.AlertDialog;
 import android.app.DownloadManager;
 import android.content.ActivityNotFoundException;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
 import android.content.pm.PackageManager;
 import android.content.pm.ResolveInfo;
 import android.net.Uri;
 import android.net.WebAddress;
 import android.os.Environment;
 import android.text.TextUtils;
 import android.util.Log;
 import android.webkit.CookieManager;
 import android.webkit.URLUtil;
 import android.widget.Toast;

 /**
  * Handle download requests
  */
 public class DownloadHandler {

     private static final boolean LOGD_ENABLED =
             com.android.browser.Browser.LOGD_ENABLED;

     private static final String LOGTAG = "DLHandler";

     /**
      * Notify the host application a download should be done, or that
      * the data should be streamed if a streaming viewer is available.
      * @param activity Activity requesting the download.
      * @param url The full url to the content that should be downloaded
      * @param userAgent User agent of the downloading application.
      * @param contentDisposition Content-disposition http header, if present.
      * @param mimetype The mimetype of the content reported by the server
      * @param referer The referer associated with the downloaded url
      * @param privateBrowsing If the request is coming from a private browsing tab.
      */
     public static void onDownloadStart(Activity activity, String url,
             String userAgent, String contentDisposition, String mimetype,
             String referer, boolean privateBrowsing) {
         // if we're dealing wih A/V content that's not explicitly marked
         //     for download, check if it's streamable.
         if (contentDisposition == null
                 || !contentDisposition.regionMatches(
                         true, 0, "attachment", 0, 10)) {
             // query the package manager to see if there's a registered handler
             //     that matches.
             Intent intent = new Intent(Intent.ACTION_VIEW);
             intent.setDataAndType(Uri.parse(url), mimetype);
             ResolveInfo info = activity.getPackageManager().resolveActivity(intent,
                     PackageManager.MATCH_DEFAULT_ONLY);
             if (info != null) {
                 ComponentName myName = activity.getComponentName();
                 // If we resolved to ourselves, we don't want to attempt to
                 // load the url only to try and download it again.
                 if (!myName.getPackageName().equals(
                         info.activityInfo.packageName)
                         || !myName.getClassName().equals(
                                 info.activityInfo.name)) {
                     // someone (other than us) knows how to handle this mime
                     // type with this scheme, don't download.
                     try {
                         activity.startActivity(intent);
                         return;
                     } catch (ActivityNotFoundException ex) {
                         if (LOGD_ENABLED) {
                             Log.d(LOGTAG, "activity not found for " + mimetype
                                     + " over " + Uri.parse(url).getScheme(),
                                     ex);
                         }
                         // Best behavior is to fall back to a download in this
                         // case
                     }
                 }
             }
         }
         onDownloadStartNoStream(activity, url, userAgent, contentDisposition,
                 mimetype, referer, privateBrowsing);
     }

     // This is to work around the fact that java.net.URI throws Exceptions
     // instead of just encoding URL's properly
     // Helper method for onDownloadStartNoStream
     private static String encodePath(String path) {
         char[] chars = path.toCharArray();

         boolean needed = false;
         for (char c : chars) {
             if (c == '[' || c == ']' || c == '|') {
                 needed = true;
                 break;
             }
         }
         if (needed == false) {
             return path;
         }

         StringBuilder sb = new StringBuilder("");
         for (char c : chars) {
             if (c == '[' || c == ']' || c == '|') {
                 sb.append('%');
                 sb.append(Integer.toHexString(c));
             } else {
                 sb.append(c);
             }
         }

         return sb.toString();
     }

     /**
      * Notify the host application a download should be done, even if there
      * is a streaming viewer available for thise type.
      * @param activity Activity requesting the download.
      * @param url The full url to the content that should be downloaded
      * @param userAgent User agent of the downloading application.
      * @param contentDisposition Content-disposition http header, if present.
      * @param mimetype The mimetype of the content reported by the server
      * @param referer The referer associated with the downloaded url
      * @param privateBrowsing If the request is coming from a private browsing tab.
      */
     /*package */ static void onDownloadStartNoStream(Activity activity,
             String url, String userAgent, String contentDisposition,
             String mimetype, String referer, boolean privateBrowsing) {

         String filename = URLUtil.guessFileName(url,
                 contentDisposition, mimetype);

         // Check to see if we have an SDCard
         String status = Environment.getExternalStorageState();
         if (!status.equals(Environment.MEDIA_MOUNTED)) {
             int title;
             String msg;

             // Check to see if the SDCard is busy, same as the music app
             if (status.equals(Environment.MEDIA_SHARED)) {
                 msg = activity.getString(R.string.download_sdcard_busy_dlg_msg);
                 title = R.string.download_sdcard_busy_dlg_title;
             } else {
                 msg = activity.getString(R.string.download_no_sdcard_dlg_msg, filename);
                 title = R.string.download_no_sdcard_dlg_title;
             }

             new AlertDialog.Builder(activity)
                 .setTitle(title)
                 .setIconAttribute(android.R.attr.alertDialogIcon)
                 .setMessage(msg)
                 .setPositiveButton(R.string.ok, null)
                 .show();
             return;
         }

         // java.net.URI is a lot stricter than KURL so we have to encode some
         // extra characters. Fix for b 2538060 and b 1634719
         WebAddress webAddress;
         try {
             webAddress = new WebAddress(url);
             webAddress.setPath(encodePath(webAddress.getPath()));
         } catch (Exception e) {
             // This only happens for very bad urls, we want to chatch the
             // exception here
             Log.e(LOGTAG, "Exception trying to parse url:" + url);
             return;
         }

         String addressString = webAddress.toString();
         Uri uri = Uri.parse(addressString);
         final DownloadManager.Request request;
         try {
             request = new DownloadManager.Request(uri);
         } catch (IllegalArgumentException e) {
             Toast.makeText(activity, R.string.cannot_download, Toast.LENGTH_SHORT).show();
             return;
         }
         request.setMimeType(mimetype);
         // set downloaded file destination to /sdcard/Download.
         // or, should it be set to one of several Environment.DIRECTORY* dirs depending on mimetype?
         try {
             request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, filename);
         } catch (IllegalStateException ex) {
             // This only happens when directory Downloads can't be created or it isn't a directory
             // this is most commonly due to temporary problems with sdcard so show appropriate string
             Log.w(LOGTAG, "Exception trying to create Download dir:", ex);
             Toast.makeText(activity, R.string.download_sdcard_busy_dlg_title,
                     Toast.LENGTH_SHORT).show();
             return;
         }
         // let this downloaded file be scanned by MediaScanner - so that it can
         // show up in Gallery app, for example.
         request.allowScanningByMediaScanner();
         request.setDescription(webAddress.getHost());
         // XXX: Have to use the old url since the cookies were stored using the
         // old percent-encoded url.
         String cookies = CookieManager.getInstance().getCookie(url, privateBrowsing);
         request.addRequestHeader("cookie", cookies);
         request.addRequestHeader("User-Agent", userAgent);
         request.addRequestHeader("Referer", referer);
         request.setNotificationVisibility(
                 DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
         if (mimetype == null) {
             if (TextUtils.isEmpty(addressString)) {
                 return;
             }
             // We must have long pressed on a link or image to download it. We
             // are not sure of the mimetype in this case, so do a head request
             new FetchUrlMimeType(activity, request, addressString, cookies,
                     userAgent).start();
         } else {
             final DownloadManager manager
                     = (DownloadManager) activity.getSystemService(Context.DOWNLOAD_SERVICE);
             new Thread("Browser download") {
                 public void run() {
                     manager.enqueue(request);
                 }
             }.start();
         }
         Toast.makeText(activity, R.string.download_pending, Toast.LENGTH_SHORT)
                 .show();
     }

 }
	/*
	* 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.app.AlertDialog;
	import android.app.DownloadManager;
	import android.content.ActivityNotFoundException;
	import android.content.ComponentName;
	import android.content.Context;
	import android.content.Intent;
	import android.content.pm.PackageManager;
	import android.content.pm.ResolveInfo;
	import android.net.Uri;
	import android.net.WebAddress;
	import android.os.Environment;
	import android.text.TextUtils;
	import android.util.Log;
	import android.webkit.CookieManager;
	import android.webkit.URLUtil;
	import android.widget.Toast;

	/**
	* Handle download requests
	*/
	public class DownloadHandler {

	private static final boolean LOGD_ENABLED =
	com.android.browser.Browser.LOGD_ENABLED;

	private static final String LOGTAG = "DLHandler";

	/**
	* Notify the host application a download should be done, or that
	* the data should be streamed if a streaming viewer is available.
	* @param activity Activity requesting the download.
	* @param url The full url to the content that should be downloaded
	* @param userAgent User agent of the downloading application.
	* @param contentDisposition Content-disposition http header, if present.
	* @param mimetype The mimetype of the content reported by the server
	* @param referer The referer associated with the downloaded url
	* @param privateBrowsing If the request is coming from a private browsing tab.
	*/
	public static void onDownloadStart(Activity activity, String url,
	String userAgent, String contentDisposition, String mimetype,
	String referer, boolean privateBrowsing) {
	// if we're dealing wih A/V content that's not explicitly marked
	// for download, check if it's streamable.
	if (contentDisposition == null
	\|\| !contentDisposition.regionMatches(
	true, 0, "attachment", 0, 10)) {
	// query the package manager to see if there's a registered handler
	// that matches.
	Intent intent = new Intent(Intent.ACTION_VIEW);
	intent.setDataAndType(Uri.parse(url), mimetype);
	ResolveInfo info = activity.getPackageManager().resolveActivity(intent,
	PackageManager.MATCH_DEFAULT_ONLY);
	if (info != null) {
	ComponentName myName = activity.getComponentName();
	// If we resolved to ourselves, we don't want to attempt to
	// load the url only to try and download it again.
	if (!myName.getPackageName().equals(
	info.activityInfo.packageName)
	\|\| !myName.getClassName().equals(
	info.activityInfo.name)) {
	// someone (other than us) knows how to handle this mime
	// type with this scheme, don't download.
	try {
	activity.startActivity(intent);
	return;
	} catch (ActivityNotFoundException ex) {
	if (LOGD_ENABLED) {
	Log.d(LOGTAG, "activity not found for " + mimetype
	+ " over " + Uri.parse(url).getScheme(),
	ex);
	}
	// Best behavior is to fall back to a download in this
	// case
	}
	}
	}
	}
	onDownloadStartNoStream(activity, url, userAgent, contentDisposition,
	mimetype, referer, privateBrowsing);
	}

	// This is to work around the fact that java.net.URI throws Exceptions
	// instead of just encoding URL's properly
	// Helper method for onDownloadStartNoStream
	private static String encodePath(String path) {
	char[] chars = path.toCharArray();

	boolean needed = false;
	for (char c : chars) {
	if (c == '[' \|\| c == ']' \|\| c == '\|') {
	needed = true;
	break;
	}
	}
	if (needed == false) {
	return path;
	}

	StringBuilder sb = new StringBuilder("");
	for (char c : chars) {
	if (c == '[' \|\| c == ']' \|\| c == '\|') {
	sb.append('%');
	sb.append(Integer.toHexString(c));
	} else {
	sb.append(c);
	}
	}

	return sb.toString();
	}

	/**
	* Notify the host application a download should be done, even if there
	* is a streaming viewer available for thise type.
	* @param activity Activity requesting the download.
	* @param url The full url to the content that should be downloaded
	* @param userAgent User agent of the downloading application.
	* @param contentDisposition Content-disposition http header, if present.
	* @param mimetype The mimetype of the content reported by the server
	* @param referer The referer associated with the downloaded url
	* @param privateBrowsing If the request is coming from a private browsing tab.
	*/
	/package / static void onDownloadStartNoStream(Activity activity,
	String url, String userAgent, String contentDisposition,
	String mimetype, String referer, boolean privateBrowsing) {

	String filename = URLUtil.guessFileName(url,
	contentDisposition, mimetype);

	// Check to see if we have an SDCard
	String status = Environment.getExternalStorageState();
	if (!status.equals(Environment.MEDIA_MOUNTED)) {
	int title;
	String msg;

	// Check to see if the SDCard is busy, same as the music app
	if (status.equals(Environment.MEDIA_SHARED)) {
	msg = activity.getString(R.string.download_sdcard_busy_dlg_msg);
	title = R.string.download_sdcard_busy_dlg_title;
	} else {
	msg = activity.getString(R.string.download_no_sdcard_dlg_msg, filename);
	title = R.string.download_no_sdcard_dlg_title;
	}

	new AlertDialog.Builder(activity)
	.setTitle(title)
	.setIconAttribute(android.R.attr.alertDialogIcon)
	.setMessage(msg)
	.setPositiveButton(R.string.ok, null)
	.show();
	return;
	}

	// java.net.URI is a lot stricter than KURL so we have to encode some
	// extra characters. Fix for b 2538060 and b 1634719
	WebAddress webAddress;
	try {
	webAddress = new WebAddress(url);
	webAddress.setPath(encodePath(webAddress.getPath()));
	} catch (Exception e) {
	// This only happens for very bad urls, we want to chatch the
	// exception here
	Log.e(LOGTAG, "Exception trying to parse url:" + url);
	return;
	}

	String addressString = webAddress.toString();
	Uri uri = Uri.parse(addressString);
	final DownloadManager.Request request;
	try {
	request = new DownloadManager.Request(uri);
	} catch (IllegalArgumentException e) {
	Toast.makeText(activity, R.string.cannot_download, Toast.LENGTH_SHORT).show();
	return;
	}
	request.setMimeType(mimetype);
	// set downloaded file destination to /sdcard/Download.
	// or, should it be set to one of several Environment.DIRECTORY* dirs depending on mimetype?
	try {
	request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, filename);
	} catch (IllegalStateException ex) {
	// This only happens when directory Downloads can't be created or it isn't a directory
	// this is most commonly due to temporary problems with sdcard so show appropriate string
	Log.w(LOGTAG, "Exception trying to create Download dir:", ex);
	Toast.makeText(activity, R.string.download_sdcard_busy_dlg_title,
	Toast.LENGTH_SHORT).show();
	return;
	}
	// let this downloaded file be scanned by MediaScanner - so that it can
	// show up in Gallery app, for example.
	request.allowScanningByMediaScanner();
	request.setDescription(webAddress.getHost());
	// XXX: Have to use the old url since the cookies were stored using the
	// old percent-encoded url.
	String cookies = CookieManager.getInstance().getCookie(url, privateBrowsing);
	request.addRequestHeader("cookie", cookies);
	request.addRequestHeader("User-Agent", userAgent);
	request.addRequestHeader("Referer", referer);
	request.setNotificationVisibility(
	DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
	if (mimetype == null) {
	if (TextUtils.isEmpty(addressString)) {
	return;
	}
	// We must have long pressed on a link or image to download it. We
	// are not sure of the mimetype in this case, so do a head request
	new FetchUrlMimeType(activity, request, addressString, cookies,
	userAgent).start();
	} else {
	final DownloadManager manager
	= (DownloadManager) activity.getSystemService(Context.DOWNLOAD_SERVICE);
	new Thread("Browser download") {
	public void run() {
	manager.enqueue(request);
	}
	}.start();
	}
	Toast.makeText(activity, R.string.download_pending, Toast.LENGTH_SHORT)
	.show();
	}

	}