com.feihong.newzxclient.tcp.IntLengthDecoder.java Source code

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Here is the source code for com.feihong.newzxclient.tcp.IntLengthDecoder.java

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/*
 * Copyright 2012 The Netty Project
 *
 * The Netty Project licenses this file to you 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.feihong.newzxclient.tcp;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.ByteToMessageDecoder;
import io.netty.handler.codec.CorruptedFrameException;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.math.BigInteger;
import java.util.List;

import zaoxun.Msg;

import android.text.format.Time;

import com.feihong.newzxclient.config.ZXConfig;
import com.google.protobuf.InvalidProtocolBufferException;

/**
 * Decodes the binary representation of a {@link BigInteger} prepended
 * with a magic number ('F' or 0x46) and a 32-bit integer length prefix into a
 * {@link BigInteger} instance.  For example, { 'F', 0, 0, 0, 1, 42 } will be
 * decoded into new BigInteger("42").
 */
public class IntLengthDecoder extends ByteToMessageDecoder {

    //private String mLogFileName;

    //private boolean flag = false;

    public void writeLog(String text) {
        /*        try {
        FileOutputStream stream = new FileOutputStream(mLogFileName, true);
        Time time = new Time();
        time.setToNow();
        String log = time.format("%Y-%m-%d %H:%M:%S  ") + text +" \r\n";
        byte[] buffer = log.getBytes();
        stream.write(buffer);
        stream.close();
                } catch (FileNotFoundException e) {
        e.printStackTrace();
                } catch (IOException e) {
        e.printStackTrace();
                }*/
    }

    @Override
    protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) {
        // Wait until the length prefix is available.
        if (in.readableBytes() < 4) {
            //String strError = String.format("Read length data error, in.readableBytes(): %d, length: %d", in.readableBytes(), 4);
            //writeLog(strError);
            return;
        }

        in.markReaderIndex();

        // Wait until the whole data is available.
        int dataLength = in.readInt();
        if (in.readableBytes() < dataLength) {
            //String strError = String.format("Read length data error, in.readableBytes(): %d, length: %d", in.readableBytes(), dataLength + 4);
            //writeLog(strError);

            in.resetReaderIndex();
            return;
        }

        // Convert the received data into a new BigInteger.
        byte[] decoded = new byte[dataLength];
        in.readBytes(decoded);

        try {
            Msg.CommonMessage commonMessage = Msg.CommonMessage.parseFrom(decoded);
            out.add(commonMessage);
        } catch (InvalidProtocolBufferException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }
}