Example usage for io.netty.buffer ByteBuf isReadable

List of usage examples for io.netty.buffer ByteBuf isReadable

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Introduction

In this page you can find the example usage for io.netty.buffer ByteBuf isReadable.

Prototype

public abstract boolean isReadable();

Source Link

Document

Returns true if and only if (this.writerIndex - this.readerIndex) is greater than 0 .

Usage

From source file:com.spotify.netty.handler.codec.zmtp.ZMTPFrame.java

License:Apache License

/**
 * Create a new frame from a channel buffer.
 *//*w  ww  .j a  v a2s . c  o  m*/
public static ZMTPFrame create(ByteBuf buf) {
    if (!buf.isReadable()) {
        return EMPTY_FRAME;
    } else {
        byte[] dst = new byte[buf.capacity()];
        buf.readBytes(dst);
        return new ZMTPFrame(dst);
    }
}

From source file:com.spotify.netty4.handler.codec.zmtp.ZMTPFramingDecoder.java

License:Apache License

@Override
protected void decode(final ChannelHandlerContext ctx, final ByteBuf in, final List<Object> out)
        throws ZMTPParsingException {
    while (in.isReadable()) {
        if (!headerParsed) {
            final int mark = in.readerIndex();
            headerParsed = header.read(in);
            if (!headerParsed) {
                // Wait for more data
                in.readerIndex(mark);/*from   w w w .ja  v a2  s . co  m*/
                return;
            }
            decoder.header(ctx, header.length(), header.more(), out);
            remaining = header.length();
        }

        final int writerMark = in.writerIndex();
        final int n = (int) min(remaining, in.readableBytes());
        final int readerMark = in.readerIndex();
        in.writerIndex(readerMark + n);
        decoder.content(ctx, in, out);
        in.writerIndex(writerMark);
        final int read = in.readerIndex() - readerMark;
        remaining -= read;
        if (remaining > 0) {
            // Wait for more data
            return;
        }
        if (!header.more()) {
            decoder.finish(ctx, out);
        }
        headerParsed = false;
    }
}

From source file:com.springapp.mvc.netty.example.http.snoop.HttpSnoopServerHandler.java

License:Apache License

@Override
protected void channelRead0(ChannelHandlerContext ctx, Object msg) {
    if (msg instanceof HttpRequest) {
        HttpRequest request = this.request = (HttpRequest) msg;

        if (HttpHeaders.is100ContinueExpected(request)) {
            send100Continue(ctx);/* w  ww  .j  a  v  a  2s  .c o m*/
        }

        buf.setLength(0);
        buf.append("WELCOME TO THE WILD WILD WEB SERVER\r\n");
        buf.append("===================================\r\n");

        buf.append("VERSION: ").append(request.getProtocolVersion()).append("\r\n");
        buf.append("HOSTNAME: ").append(HttpHeaders.getHost(request, "unknown")).append("\r\n");
        buf.append("REQUEST_URI: ").append(request.getUri()).append("\r\n\r\n");

        HttpHeaders headers = request.headers();
        if (!headers.isEmpty()) {
            for (Entry<String, String> h : headers) {
                String key = h.getKey();
                String value = h.getValue();
                buf.append("HEADER: ").append(key).append(" = ").append(value).append("\r\n");
            }
            buf.append("\r\n");
        }

        QueryStringDecoder queryStringDecoder = new QueryStringDecoder(request.getUri());
        Map<String, List<String>> params = queryStringDecoder.parameters();
        if (!params.isEmpty()) {
            for (Entry<String, List<String>> p : params.entrySet()) {
                String key = p.getKey();
                List<String> vals = p.getValue();
                for (String val : vals) {
                    buf.append("PARAM: ").append(key).append(" = ").append(val).append("\r\n");
                }
            }
            buf.append("\r\n");
        }

        appendDecoderResult(buf, request);
    }

    if (msg instanceof HttpContent) {
        HttpContent httpContent = (HttpContent) msg;

        ByteBuf content = httpContent.content();
        if (content.isReadable()) {
            buf.append("CONTENT: ");
            buf.append(content.toString(CharsetUtil.UTF_8));
            buf.append("\r\n");
            appendDecoderResult(buf, request);
        }

        if (msg instanceof LastHttpContent) {
            buf.append("END OF CONTENT\r\n");

            LastHttpContent trailer = (LastHttpContent) msg;
            if (!trailer.trailingHeaders().isEmpty()) {
                buf.append("\r\n");
                for (String name : trailer.trailingHeaders().names()) {
                    for (String value : trailer.trailingHeaders().getAll(name)) {
                        buf.append("TRAILING HEADER: ");
                        buf.append(name).append(" = ").append(value).append("\r\n");
                    }
                }
                buf.append("\r\n");
            }

            if (!writeResponse(trailer, ctx)) {
                // If keep-alive is off, close the connection once the content is fully written.
                ctx.writeAndFlush(Unpooled.EMPTY_BUFFER).addListener(ChannelFutureListener.CLOSE);
            }
        }
    }
}

From source file:com.srotya.sidewinder.core.ingress.http.HTTPDataPointDecoder.java

License:Apache License

@Override
protected void channelRead0(ChannelHandlerContext ctx, Object msg) throws Exception {
    try {// www .  ja va 2  s  .  co  m
        if (msg instanceof HttpRequest) {
            HttpRequest request = this.request = (HttpRequest) msg;
            if (HttpUtil.is100ContinueExpected(request)) {
                send100Continue(ctx);
            }

            QueryStringDecoder queryStringDecoder = new QueryStringDecoder(request.uri());
            path = queryStringDecoder.path();

            Map<String, List<String>> params = queryStringDecoder.parameters();
            if (!params.isEmpty()) {
                for (Entry<String, List<String>> p : params.entrySet()) {
                    String key = p.getKey();
                    if (key.equalsIgnoreCase("db")) {
                        dbName = p.getValue().get(0);
                    }
                }
            }

            if (path != null && path.contains("query")) {
                Gson gson = new Gson();
                JsonObject obj = new JsonObject();
                JsonArray ary = new JsonArray();
                ary.add(new JsonObject());
                obj.add("results", ary);
                responseString.append(gson.toJson(obj));
            }
        }

        if (msg instanceof HttpContent) {
            HttpContent httpContent = (HttpContent) msg;
            ByteBuf byteBuf = httpContent.content();
            if (byteBuf.isReadable()) {
                requestBuffer.append(byteBuf.toString(CharsetUtil.UTF_8));
            }

            if (msg instanceof LastHttpContent) {
                // LastHttpContent lastHttpContent = (LastHttpContent) msg;
                // if (!lastHttpContent.trailingHeaders().isEmpty()) {
                // }

                if (dbName == null) {
                    responseString.append("Invalid database null");
                    logger.severe("Invalid database null");
                } else {
                    String payload = requestBuffer.toString();
                    logger.fine("Request:" + payload);
                    List<DataPoint> dps = dataPointsFromString(dbName, payload);
                    for (DataPoint dp : dps) {
                        try {
                            engine.writeDataPoint(dp);
                            logger.fine("Accepted:" + dp + "\t" + new Date(dp.getTimestamp()));
                        } catch (IOException e) {
                            logger.fine("Dropped:" + dp + "\t" + e.getMessage());
                            responseString.append("Dropped:" + dp);
                        }
                    }
                }
                if (writeResponse(request, ctx)) {
                    ctx.writeAndFlush(Unpooled.EMPTY_BUFFER).addListener(ChannelFutureListener.CLOSE);
                }
            }
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}

From source file:com.streamsets.pipeline.lib.parser.net.DelimitedLengthFieldBasedFrameDecoder.java

License:Apache License

public DelimitedLengthFieldBasedFrameDecoder(int maxFrameLength, int lengthAdjustment, boolean failFast,
        ByteBuf delimiter, Charset lengthFieldCharset, boolean trimLengthString) {
    if (delimiter == null) {
        throw new NullPointerException("delimiter");
    }//from   w ww. j  a va  2  s  .  c o m
    if (!delimiter.isReadable()) {
        throw new IllegalArgumentException("empty delimiter");
    }

    this.delimiter = delimiter.slice(delimiter.readerIndex(), delimiter.readableBytes());
    this.lengthFieldCharset = lengthFieldCharset;

    this.maxFrameLength = maxFrameLength;
    this.lengthAdjustment = lengthAdjustment;
    this.failFast = failFast;
    this.trimLengthString = trimLengthString;
}

From source file:com.superman.netty.handler.DiscardServerHandler.java

License:Apache License

@Override
public void channelRead0(ChannelHandlerContext ctx, Object msg) throws Exception {
    try {/*  www  . j  a  v  a  2s .  c o m*/
        ByteBuf bb = (ByteBuf) msg;
        while (bb.isReadable()) {
            System.out.print((char) bb.readByte());
            System.out.flush();
        }
    } finally {
        // ((ByteBuf) msg).release();
        ReferenceCountUtil.release(msg);
    }
    LOGGER.info("?");
}

From source file:com.tesora.dve.db.mysql.common.MysqlAPIUtils.java

License:Open Source License

public static ArrayList<Integer> locateLengthCodedStrings(ByteBuf cb, int skipAmount) {
    ArrayList<Integer> offsets = new ArrayList<>();
    ByteBuf slice = cb.slice().order(ByteOrder.LITTLE_ENDIAN);
    slice.skipBytes(skipAmount);// w w  w. j  a va 2 s  .  c o  m
    while (slice.isReadable()) {
        offsets.add(slice.readerIndex());
        skipLengthCodedString(slice);
    }
    return offsets;
}

From source file:com.tesora.dve.db.mysql.libmy.MyOKResponse.java

License:Open Source License

@Override
public void unmarshallMessage(ByteBuf cb) {
    cb.readByte(); // field count - always 0
    affectedRows = MysqlAPIUtils.getLengthCodedLong(cb);
    insertId = MysqlAPIUtils.getLengthCodedLong(cb);
    serverStatus = cb.readUnsignedShort();
    warningCount = cb.readUnsignedShort();
    if (cb.isReadable())
        message = MysqlAPIUtils.readBytesAsString(cb, CharsetUtil.UTF_8);
}

From source file:com.tesora.dve.mysqlapi.repl.messages.MyStatusVariables.java

License:Open Source License

public void parseStatusVariables(ByteBuf cb, int svLen) throws PEException {
    if (svLen > 0) {
        ByteBuf statsVarsBuf = cb.readBytes(svLen);
        while (statsVarsBuf.isReadable()) {
            byte code = statsVarsBuf.readByte();
            MyQueryEventCode mqec = MyQueryEventCode.fromByte(code);
            if (mqec == null) {
                throw new PEException("Replication could not decode query event code: '" + code + "' (0x"
                        + Integer.toHexString(code) + ")");
            }//from  w ww  .java  2  s.  c  om

            switch (mqec) {
            case Q_FLAGS2_CODE:
                int flags = statsVarsBuf.readInt();
                suppliedEventCodes.add(new QueryFlags2Event(flags));
                break;

            case Q_SQL_MODE_CODE:
                long sqlMode = statsVarsBuf.readLong();
                suppliedEventCodes.add(new QuerySQLModeEvent(sqlMode));
                break;

            case Q_CATALOG_CODE: {
                byte len = statsVarsBuf.readByte();
                String catalog = MysqlAPIUtils.readBytesAsString(statsVarsBuf, len, CharsetUtil.UTF_8);
                statsVarsBuf.readByte(); // null terminated byte

                suppliedEventCodes.add(new QueryCatalogEvent(catalog));
                break;
            }
            case Q_AUTO_INCREMENT:
                int autoIncrementIncrement = statsVarsBuf.readUnsignedShort();
                int autoIncrementOffset = statsVarsBuf.readUnsignedShort();

                suppliedEventCodes
                        .add(new QueryAutoIncrementEvent(autoIncrementIncrement, autoIncrementOffset));
                break;

            case Q_CHARSET_CODE:
                int charSetClient = statsVarsBuf.readUnsignedShort();
                int collationConnection = statsVarsBuf.readUnsignedShort();
                int collationServer = statsVarsBuf.readUnsignedShort();

                suppliedEventCodes
                        .add(new QueryCharSetCodeEvent(charSetClient, collationConnection, collationServer));
                break;

            case Q_TIME_ZONE_CODE: {
                byte len = statsVarsBuf.readByte();
                String timeZone = MysqlAPIUtils.readBytesAsString(statsVarsBuf, len, CharsetUtil.UTF_8);

                suppliedEventCodes.add(new QueryTimeZoneCodeEvent(timeZone));
                break;
            }
            case Q_CATALOG_NZ_CODE: {
                byte catalogLen = statsVarsBuf.readByte();
                String catalog = MysqlAPIUtils.readBytesAsString(statsVarsBuf, catalogLen, CharsetUtil.UTF_8);

                suppliedEventCodes.add(new QueryCatalogNZEvent(catalog));
                break;
            }
            case Q_LC_TIME_NAMES_CODE:
                short monthDayNames = statsVarsBuf.readShort();

                suppliedEventCodes.add(new QueryTimeNamesEvent(monthDayNames));
                break;

            case Q_CHARSET_DATABASE_CODE:
                short collationDatabase = statsVarsBuf.readShort();

                suppliedEventCodes.add(new QueryCollationDatabaseEvent(collationDatabase));
                break;

            case Q_TABLE_MAP_FOR_UPDATE_CODE:
                long tableMapForUpdate = statsVarsBuf.readLong();

                suppliedEventCodes.add(new QueryTableMapEvent(tableMapForUpdate));
                break;

            case Q_MASTER_DATA_WRITTEN_CODE:
                int originalLength = statsVarsBuf.readInt();

                suppliedEventCodes.add(new QueryMasterDataWrittenEvent(originalLength));
                break;

            case Q_INVOKER:
                int userLen = statsVarsBuf.readByte();
                String user = MysqlAPIUtils.readBytesAsString(statsVarsBuf, userLen, CharsetUtil.UTF_8);
                int hostLen = statsVarsBuf.readByte();
                String host = MysqlAPIUtils.readBytesAsString(statsVarsBuf, hostLen, CharsetUtil.UTF_8);

                suppliedEventCodes.add(new QueryInvokerEvent(user, host));
                break;

            case Q_UPDATED_DB_NAMES:
                List<String> dbNames = new ArrayList<String>();
                int numDbs = statsVarsBuf.readByte();
                if (numDbs > 0) {
                    for (int i = 0; i < numDbs; i++) {
                        dbNames.add(statsVarsBuf.readSlice(statsVarsBuf.bytesBefore((byte) 0))
                                .toString(CharsetUtil.UTF_8));
                        statsVarsBuf.readByte(); //read null byte
                    }
                }
                suppliedEventCodes.add(new QueryUpdatedDBNamesEvent(dbNames));
                break;

            case Q_MICROSECONDS:
                int microseconds = statsVarsBuf.readMedium();

                suppliedEventCodes.add(new QueryMicrosecondsEvent(microseconds));
                break;

            case Q_HRNOW:
                //TODO: this was apparently added for MariaDB, but I can't find a lot of info on it. skip for now.
                suppliedEventCodes.add(new QueryMicrosecondsEvent(statsVarsBuf.readUnsignedMedium()));
                break;

            default:
                throw new PEException("Replication encountered an unknown query event code: '" + code + "' (0x"
                        + Integer.toHexString(code) + ")");
            }
        }
    }
}

From source file:com.topsec.bdc.platform.api.server.http.HttpSnoopServerHandler.java

License:Apache License

@Override
protected void channelRead0(ChannelHandlerContext ctx, Object msg) {

    if (msg instanceof HttpRequest) {
        //?HTTP?//from  ww  w.  j a  va  2  s. com
        //HttpRequest request = this._request = (HttpRequest) msg;
        this._request = (HttpRequest) msg;
        //
        _requestBodyBuf.setLength(0);
        /*
        System.out.println("===================================\r\n");
                
        System.out.println("VERSION: " + request.getProtocolVersion());
        System.out.println("HOSTNAME: " + HttpHeaders.getHost(request, "unknown"));
        System.out.println("REQUEST_URI: " + request.getUri());
                
        HttpHeaders headers = request.headers();
        if (!headers.isEmpty()) {
        for (Map.Entry<String, String> h : headers) {
            String key = h.getKey();
            String value = h.getValue();
            System.out.println("HEADER: " + key + " = " + value);
        }
        }
                
        Map<String, List<String>> params = queryStringDecoder.parameters();
        if (!params.isEmpty()) {
        for (Entry<String, List<String>> p : params.entrySet()) {
            String key = p.getKey();
            List<String> vals = p.getValue();
            for (String val : vals) {
                System.out.println("PARAM: " + key + " = " + val);
            }
        }
        }
        //
        System.out.println("===================================");
        */

    }

    if (msg instanceof HttpContent) {
        //?HTTP BODY BODY?chunked?CHUNKED????
        HttpContent httpContent = (HttpContent) msg;

        ByteBuf content = httpContent.content();
        if (content.isReadable()) {
            _requestBodyBuf.append(content.toString(CharsetUtil.UTF_8));
            //content.release();
        }
        //??Response??
        if (msg instanceof LastHttpContent) {
            //
            LastHttpContent trailer = (LastHttpContent) msg;
            //
            String responseContent = null;
            //
            //fill response
            if (trailer.getDecoderResult().isSuccess() == false) {
                _responseStatus = HttpResponseStatus.BAD_REQUEST;
                responseContent = HttpResponseStatus.BAD_REQUEST.reasonPhrase();
            } else {
                try {
                    _responseStatus = HttpResponseStatus.OK;
                    responseContent = fireListenerSucceed(_requestBodyBuf.toString());
                } catch (Throwable e) {
                    e.printStackTrace();
                    _responseStatus = HttpResponseStatus.SERVICE_UNAVAILABLE;
                    responseContent = e.toString();
                }
            }

            try {
                //send back response and close connection
                writeResponseAndClose(ctx, responseContent);
            } catch (Exception e) {
                e.printStackTrace();
            } finally {
                _requestBodyBuf.setLength(0);
            }
        }
    }
}