/**
* Copyright (C) 2012 Turn, Inc.
*
* 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.turn.ttorrent.common.protocol.http;
import com.turn.ttorrent.bcodec.BDecoder;
import com.turn.ttorrent.bcodec.BEValue;
import com.turn.ttorrent.common.protocol.TrackerMessage;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.Map;
/**
* Base class for HTTP tracker messages.
*
* @author mpetazzoni
*/
public abstract class HTTPTrackerMessage extends TrackerMessage {
protected HTTPTrackerMessage(Type type, ByteBuffer data) {
super(type, data);
}
public static HTTPTrackerMessage parse(ByteBuffer data)
throws IOException, MessageValidationException {
BEValue decoded = BDecoder.bdecode(data);
if (decoded == null) {
throw new MessageValidationException(
"Could not decode tracker message (not B-encoded?)!");
}
Map<String, BEValue> params = decoded.getMap();
if (params.containsKey("info_hash")) {
return HTTPAnnounceRequestMessage.parse(data);
} else if (params.containsKey("peers")) {
return HTTPAnnounceResponseMessage.parse(data);
} else if (params.containsKey("failure reason")) {
return HTTPTrackerErrorMessage.parse(data);
}
throw new MessageValidationException("Unknown HTTP tracker message!");
}
}