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/*
* Copyright (C) 2008 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 android.content.Context;
import android.net.http.EventHandler;
import android.net.http.Headers;
import android.net.Uri;
import java.io.File;
import java.io.FileInputStream;
/**
* This class is a concrete implementation of StreamLoader that loads
* "content:" URIs
*/
class ContentLoader extends StreamLoader {
private String mUrl;
private Context mContext;
private String mContentType;
/**
* Construct a ContentLoader with the specified content URI
*
* @param rawUrl "content:" url pointing to content to be loaded. This url
* is the same url passed in to the WebView.
* @param loadListener LoadListener to pass the content to
* @param context Context to use to access the asset.
*/
ContentLoader(String rawUrl, LoadListener loadListener, Context context) {
super(loadListener);
mContext = context;
/* strip off mimetype */
int mimeIndex = rawUrl.lastIndexOf('?');
if (mimeIndex != -1) {
mUrl = rawUrl.substring(0, mimeIndex);
mContentType = rawUrl.substring(mimeIndex + 1);
} else {
mUrl = rawUrl;
}
}
@Override
protected boolean setupStreamAndSendStatus() {
Uri uri = Uri.parse(mUrl);
if (uri == null) {
mHandler.error(
EventHandler.FILE_NOT_FOUND_ERROR,
mContext.getString(
com.android.internal.R.string.httpErrorBadUrl) +
" " + mUrl);
return false;
}
try {
mDataStream = mContext.getContentResolver().openInputStream(uri);
mHandler.status(1, 1, 0, "OK");
} catch (java.io.FileNotFoundException ex) {
mHandler.error(
EventHandler.FILE_NOT_FOUND_ERROR,
mContext.getString(
com.android.internal.R.string.httpErrorFileNotFound) +
" " + ex.getMessage());
return false;
} catch (java.io.IOException ex) {
mHandler.error(
EventHandler.FILE_ERROR,
mContext.getString(
com.android.internal.R.string.httpErrorFileNotFound) +
" " + ex.getMessage());
return false;
} catch (RuntimeException ex) {
// readExceptionWithFileNotFoundExceptionFromParcel in DatabaseUtils
// can throw a serial of RuntimeException. Catch them all here.
mHandler.error(
EventHandler.FILE_ERROR,
mContext.getString(
com.android.internal.R.string.httpErrorFileNotFound) +
" " + ex.getMessage());
return false;
}
return true;
}
@Override
protected void buildHeaders(Headers headers) {
if (mContentType != null) {
headers.setContentType("text/html");
}
}
/**
* Construct a ContentLoader and instruct it to start loading.
*
* @param url "content:" url pointing to content to be loaded
* @param loadListener LoadListener to pass the content to
* @param context Context to use to access the asset.
*/
public static void requestUrl(String url, LoadListener loadListener,
Context context) {
ContentLoader loader = new ContentLoader(url, loadListener, context);
loader.load();
}
}
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