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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.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);
if (!TextUtils.isEmpty(referer)) {
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();
}
}
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