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/*
* Copyright (C) 2018 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 org.mozilla.thirdparty.com.google.android.exoplayer2.upstream;
import android.net.Uri;
import androidx.annotation.Nullable;
import org.mozilla.thirdparty.com.google.android.exoplayer2.C;
import org.mozilla.thirdparty.com.google.android.exoplayer2.util.Assertions;
import java.io.IOException;
import java.util.Collections;
import java.util.List;
import java.util.Map;
/**
* {@link DataSource} wrapper which keeps track of bytes transferred, redirected uris, and response
* headers.
*/
public final class StatsDataSource implements DataSource {
private final DataSource dataSource;
private long bytesRead;
private Uri lastOpenedUri;
private Map<String, List<String>> lastResponseHeaders;
/**
* Creates the stats data source.
*
* @param dataSource The wrapped {@link DataSource}.
*/
public StatsDataSource(DataSource dataSource) {
this.dataSource = Assertions.checkNotNull(dataSource);
lastOpenedUri = Uri.EMPTY;
lastResponseHeaders = Collections.emptyMap();
}
/** Resets the number of bytes read as returned from {@link #getBytesRead()} to zero. */
public void resetBytesRead() {
bytesRead = 0;
}
/** Returns the total number of bytes that have been read from the data source. */
public long getBytesRead() {
return bytesRead;
}
/**
* Returns the {@link Uri} associated with the last {@link #open(DataSpec)} call. If redirection
* occurred, this is the redirected uri.
*/
public Uri getLastOpenedUri() {
return lastOpenedUri;
}
/** Returns the response headers associated with the last {@link #open(DataSpec)} call. */
public Map<String, List<String>> getLastResponseHeaders() {
return lastResponseHeaders;
}
@Override
public void addTransferListener(TransferListener transferListener) {
dataSource.addTransferListener(transferListener);
}
@Override
public long open(DataSpec dataSpec) throws IOException {
// Reassign defaults in case dataSource.open throws an exception.
lastOpenedUri = dataSpec.uri;
lastResponseHeaders = Collections.emptyMap();
long availableBytes = dataSource.open(dataSpec);
lastOpenedUri = Assertions.checkNotNull(getUri());
lastResponseHeaders = getResponseHeaders();
return availableBytes;
}
@Override
public int read(byte[] buffer, int offset, int readLength) throws IOException {
int bytesRead = dataSource.read(buffer, offset, readLength);
if (bytesRead != C.RESULT_END_OF_INPUT) {
this.bytesRead += bytesRead;
}
return bytesRead;
}
@Override
@Nullable
public Uri getUri() {
return dataSource.getUri();
}
@Override
public Map<String, List<String>> getResponseHeaders() {
return dataSource.getResponseHeaders();
}
@Override
public void close() throws IOException {
dataSource.close();
}
}
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