M7350/base/core/java/android/webkit/ContentLoader.java

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2024-09-09 08:52:07 +00:00
/*
* 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.net.http.EventHandler;
import android.net.http.Headers;
import android.net.Uri;
/**
* This class is a concrete implementation of StreamLoader that loads
* "content:" URIs
*/
class ContentLoader extends StreamLoader {
private String mUrl;
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
*/
ContentLoader(String rawUrl, LoadListener loadListener) {
super(loadListener);
/* strip off mimetype */
int mimeIndex = rawUrl.lastIndexOf('?');
if (mimeIndex != -1) {
mUrl = rawUrl.substring(0, mimeIndex);
mContentType = rawUrl.substring(mimeIndex + 1);
} else {
mUrl = rawUrl;
}
}
private String errString(Exception ex) {
String exMessage = ex.getMessage();
String errString = mContext.getString(
com.android.internal.R.string.httpErrorFileNotFound);
if (exMessage != null) {
errString += " " + exMessage;
}
return errString;
}
@Override
protected boolean setupStreamAndSendStatus() {
Uri uri = Uri.parse(mUrl);
if (uri == null) {
mLoadListener.error(
EventHandler.FILE_NOT_FOUND_ERROR,
mContext.getString(
com.android.internal.R.string.httpErrorBadUrl) +
" " + mUrl);
return false;
}
try {
mDataStream = mContext.getContentResolver().openInputStream(uri);
mLoadListener.status(1, 1, 200, "OK");
} catch (java.io.FileNotFoundException ex) {
mLoadListener.error(EventHandler.FILE_NOT_FOUND_ERROR, errString(ex));
return false;
} catch (RuntimeException ex) {
// readExceptionWithFileNotFoundExceptionFromParcel in DatabaseUtils
// can throw a serial of RuntimeException. Catch them all here.
mLoadListener.error(EventHandler.FILE_ERROR, errString(ex));
return false;
}
return true;
}
@Override
protected void buildHeaders(Headers headers) {
if (mContentType != null) {
headers.setContentType("text/html");
}
// content can change, we don't want WebKit to cache it
headers.setCacheControl("no-store, no-cache");
}
}