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/*
* Copyright (C) 2007 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 android.webkit;
import com.android.internal.R;
import android.content.Context;
import android.content.res.AssetManager;
import android.net.http.EventHandler;
import android.net.http.Headers;
import android.os.Environment;
import java.io.File;
import java.io.FileInputStream;
/**
* This class is a concrete implementation of StreamLoader that uses a
* file or asset as the source for the stream.
*
*/
class FileLoader extends StreamLoader {
private String mPath; // Full path to the file to load
private Context mContext; // Application context, used for asset loads
private boolean mIsAsset; // Indicates if the load is an asset or not
private boolean mAllowFileAccess; // Allow/block file system access
/**
* Construct a FileLoader with the file URL specified as the content
* source.
*
* @param url Full file url pointing to content to be loaded
* @param loadListener LoadListener to pass the content to
* @param context Context to use to access the asset.
* @param asset true if url points to an asset.
* @param allowFileAccess true if this WebView is allowed to access files
* on the file system.
*/
FileLoader(String url, LoadListener loadListener, Context context,
boolean asset, boolean allowFileAccess) {
super(loadListener);
mIsAsset = asset;
mContext = context;
mAllowFileAccess = allowFileAccess;
// clean the Url
int index = url.indexOf('?');
if (mIsAsset) {
mPath = index > 0 ? URLUtil.stripAnchor(
url.substring(URLUtil.ASSET_BASE.length(), index)) :
URLUtil.stripAnchor(url.substring(
URLUtil.ASSET_BASE.length()));
} else {
mPath = index > 0 ? URLUtil.stripAnchor(
url.substring(URLUtil.FILE_BASE.length(), index)) :
URLUtil.stripAnchor(url.substring(
URLUtil.FILE_BASE.length()));
}
}
@Override
protected boolean setupStreamAndSendStatus() {
try {
if (mIsAsset) {
try {
mDataStream = mContext.getAssets().open(mPath);
} catch (java.io.FileNotFoundException ex) {
// try the rest files included in the package
mDataStream = mContext.getAssets().openNonAsset(mPath);
}
} else {
if (!mAllowFileAccess) {
mHandler.error(EventHandler.FILE_ERROR,
mContext.getString(R.string.httpErrorFileNotFound));
return false;
}
mDataStream = new FileInputStream(mPath);
mContentLength = (new File(mPath)).length();
}
mHandler.status(1, 1, 0, "OK");
} catch (java.io.FileNotFoundException ex) {
mHandler.error(
EventHandler.FILE_NOT_FOUND_ERROR,
mContext.getString(R.string.httpErrorFileNotFound) +
" " + ex.getMessage());
return false;
} catch (java.io.IOException ex) {
mHandler.error(EventHandler.FILE_ERROR,
mContext.getString(R.string.httpErrorFileNotFound) +
" " + ex.getMessage());
return false;
}
return true;
}
@Override
protected void buildHeaders(Headers headers) {
// do nothing.
}
/**
* Construct a FileLoader and instruct it to start loading.
*
* @param url Full file url pointing to content to be loaded
* @param loadListener LoadListener to pass the content to
* @param context Context to use to access the asset.
* @param asset true if url points to an asset.
* @param allowFileAccess true if this FileLoader can load files from the
* file system.
*/
public static void requestUrl(String url, LoadListener loadListener,
Context context, boolean asset, boolean allowFileAccess) {
FileLoader loader = new FileLoader(url, loadListener, context, asset,
allowFileAccess);
loader.load();
}
}
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