Example usage for io.netty.buffer ByteBuf readableBytes

Introduction

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

Prototype

public abstract int readableBytes();

Source Link

Document

Returns the number of readable bytes which is equal to (this.writerIndex - this.readerIndex) .

Usage

From source file:com.cloudhopper.smpp.transcoder.PduDecoderTest.java

License:Apache License

@Test
public void decodeQuerySmResp() throws Exception {
    ByteBuf buffer = BufferHelper.createBuffer("00000019800000030000000000004FE8313233343500000600");

    QuerySmResp pdu0 = (QuerySmResp) transcoder.decode(buffer);

    Assert.assertEquals(25, pdu0.getCommandLength());
    Assert.assertEquals(SmppConstants.CMD_ID_QUERY_SM_RESP, pdu0.getCommandId());
    Assert.assertEquals(0, pdu0.getCommandStatus());
    Assert.assertEquals(20456, pdu0.getSequenceNumber());
    Assert.assertEquals("12345", pdu0.getMessageId());
    Assert.assertEquals("", pdu0.getFinalDate());
    Assert.assertEquals((byte) 0x06, pdu0.getMessageState());
    Assert.assertEquals((byte) 0x00, pdu0.getErrorCode());
    Assert.assertEquals(true, pdu0.isResponse());

    Assert.assertEquals(0, buffer.readableBytes());
}

---

From source file:com.cloudhopper.smpp.util.ChannelBufferUtil.java

License:Apache License

/**
 * Read and create a new Address from a buffer.  Checks if there is
 * a minimum number of bytes readable from the buffer.
 * @param buffer/* w  ww  .  j av a 2 s.  co  m*/
 * @return
 * @throws UnrecoverablePduException
 * @throws RecoverablePduException
 */
static public Address readAddress(ByteBuf buffer) throws UnrecoverablePduException, RecoverablePduException {
    // an address is at least 3 bytes long (ton, npi, and null byte)
    if (buffer.readableBytes() < 3) {
        throw new NotEnoughDataInBufferException("Parsing address", buffer.readableBytes(), 3);
    }
    Address address = new Address();
    address.read(buffer);
    return address;
}

---

From source file:com.cloudhopper.smpp.util.ChannelBufferUtil.java

License:Apache License

/**
 * Reads a TLV from a buffer. This method is greedy and will read bytes
 * even if it won't be able to successfully complete.  It's assumed this
 * method will only be called if its known ahead of time that all bytes
 * will be available ahead of time./*www  . j a  va 2 s .  c  o m*/
 * @param buffer The buffer to read from
 * @return A new TLV instance
 * @throws NotEnoughDataInBufferException
 */
static public Tlv readTlv(ByteBuf buffer) throws NotEnoughDataInBufferException {
    // a TLV is at least 4 bytes (tag+length)
    if (buffer.readableBytes() < 4) {
        throw new NotEnoughDataInBufferException("Parsing TLV tag and length", buffer.readableBytes(), 4);
    }

    short tag = buffer.readShort();
    int length = buffer.readUnsignedShort();

    // check if we have enough data for the TLV
    if (buffer.readableBytes() < length) {
        throw new NotEnoughDataInBufferException("Parsing TLV value", buffer.readableBytes(), length);
    }

    byte[] value = new byte[length];
    buffer.readBytes(value);

    return new Tlv(tag, value);
}

---

From source file:com.cloudhopper.smpp.util.ChannelBufferUtil.java

License:Apache License

/**
 * Reads a C-String (null terminated) from a buffer.  This method will
 * attempt to find the null byte and read all data up to and including
 * the null byte.  The returned String does not include the null byte.
 * Will throw an exception if no null byte is found and it runs out of data
 * in the buffer to read.//from  ww  w.  jav a2 s  .  c o m
 * @param buffer
 * @return
 * @throws TerminatingNullByteNotFoundException
 */
static public String readNullTerminatedString(ByteBuf buffer) throws TerminatingNullByteNotFoundException {
    // maximum possible length are the readable bytes in buffer
    int maxLength = buffer.readableBytes();

    // if there are no readable bytes, return null
    if (maxLength == 0) {
        return null;
    }

    // the reader index is defaulted to the readerIndex
    int offset = buffer.readerIndex();
    int zeroPos = 0;

    // search for NULL byte until we hit end or find it
    while ((zeroPos < maxLength) && (buffer.getByte(zeroPos + offset) != 0x00)) {
        zeroPos++;
    }

    if (zeroPos >= maxLength) {
        // a NULL byte was not found
        throw new TerminatingNullByteNotFoundException(
                "Terminating null byte not found after searching [" + maxLength + "] bytes");
    }

    // at this point, we found a terminating zero
    String result = null;
    if (zeroPos > 0) {
        // read a new byte array
        byte[] bytes = new byte[zeroPos];
        buffer.readBytes(bytes);
        try {
            result = new String(bytes, "ISO-8859-1");
        } catch (UnsupportedEncodingException e) {
            logger.error("Impossible error", e);
        }
    } else {
        result = "";
    }

    // at this point, we have just one more byte to skip over (the null byte)
    byte b = buffer.readByte();
    if (b != 0x00) {
        logger.error("Impossible error: last byte read SHOULD have been a null byte, but was [" + b + "]");
    }

    return result;
}

---

From source file:com.cloudhopper.smpp.util.ChannelBufferUtilTest.java

License:Apache License

@Test
public void readNullTerminatedString() throws Exception {
    // normal case with a termination zero
    ByteBuf buffer0 = BufferHelper.createBuffer("343439353133363139323000");
    String str0 = ChannelBufferUtil.readNullTerminatedString(buffer0);
    Assert.assertEquals("44951361920", str0);
    // make sure the entire buffer is still there we started with
    Assert.assertEquals(0, buffer0.readableBytes());

    // another case with an extra byte after NULL byte
    buffer0 = BufferHelper.createBuffer("343439353133363139323000FF");
    str0 = ChannelBufferUtil.readNullTerminatedString(buffer0);
    Assert.assertEquals("44951361920", str0);
    // make sure the entire buffer is still there we started with
    Assert.assertEquals(1, buffer0.readableBytes());

    // another case with an first extra byte
    buffer0 = BufferHelper.createBuffer("39343439353133363139323000");
    buffer0.readByte(); // skip 1 byte
    str0 = ChannelBufferUtil.readNullTerminatedString(buffer0);
    Assert.assertEquals("44951361920", str0);
    // make sure the entire buffer is still there we started with
    Assert.assertEquals(0, buffer0.readableBytes());

    // another case with an first extra byte and last extra byte
    buffer0 = BufferHelper.createBuffer("39343439353133363139323000FF");
    buffer0.readByte(); // skip 1 byte
    str0 = ChannelBufferUtil.readNullTerminatedString(buffer0);
    Assert.assertEquals("44951361920", str0);
    // make sure the entire buffer is still there we started with
    Assert.assertEquals(1, buffer0.readableBytes());

    // another case with an empty string
    buffer0 = BufferHelper.createBuffer("00");
    str0 = ChannelBufferUtil.readNullTerminatedString(buffer0);
    Assert.assertEquals("", str0);
    // make sure the entire buffer is still there we started with
    Assert.assertEquals(0, buffer0.readableBytes());

    // another case with an empty string and last extra byte
    buffer0 = BufferHelper.createBuffer("0039");
    str0 = ChannelBufferUtil.readNullTerminatedString(buffer0);
    Assert.assertEquals("", str0);
    // make sure the entire buffer is still there we started with
    Assert.assertEquals(1, buffer0.readableBytes());

    // no bytes left to read in buffer will return null
    buffer0 = BufferHelper.createBuffer("");
    str0 = ChannelBufferUtil.readNullTerminatedString(buffer0);
    Assert.assertNull(str0);//from   w ww  .  j a v  a2  s  . c  o m
    Assert.assertEquals(0, buffer0.readableBytes());

    // no terminating zero
    try {
        buffer0 = BufferHelper.createBuffer("39");
        str0 = ChannelBufferUtil.readNullTerminatedString(buffer0);
        Assert.fail();
    } catch (TerminatingNullByteNotFoundException e) {
        // correct behavior
        Assert.assertEquals(1, buffer0.readableBytes());
    }

    // unsupported latin-1 chars?
    buffer0 = BufferHelper.createBuffer("0100");
    str0 = ChannelBufferUtil.readNullTerminatedString(buffer0);
    // correct behavior
    Assert.assertEquals(0, buffer0.readableBytes());
}

---

From source file:com.cloudhopper.smpp.util.ChannelBufferUtilTest.java

License:Apache License

@Test
public void readTlv() throws Exception {
    Tlv tlv0 = null;/* ww  w .  jav a2 s .c o  m*/
    ByteBuf buffer0 = null;

    // a single byte TLV
    buffer0 = BufferHelper.createBuffer("0210000134");
    tlv0 = ChannelBufferUtil.readTlv(buffer0);

    Assert.assertEquals(0, buffer0.readableBytes());
    Assert.assertEquals((short) 0x0210, tlv0.getTag());
    Assert.assertEquals((short) 0x01, tlv0.getLength());
    Assert.assertArrayEquals(new byte[] { 0x34 }, tlv0.getValue());

    // a C-string TLV
    buffer0 = BufferHelper.createBuffer("140200056331657400");
    tlv0 = ChannelBufferUtil.readTlv(buffer0);

    Assert.assertEquals(0, buffer0.readableBytes());
    Assert.assertEquals((short) 0x1402, tlv0.getTag());
    Assert.assertEquals((short) 0x05, tlv0.getLength());
    Assert.assertArrayEquals(HexUtil.toByteArray("6331657400"), tlv0.getValue());

    // a short or just 2 byte TLV
    buffer0 = BufferHelper.createBuffer("02040002ce34");
    tlv0 = ChannelBufferUtil.readTlv(buffer0);

    Assert.assertEquals(0, buffer0.readableBytes());
    Assert.assertEquals((short) 0x0204, tlv0.getTag());
    Assert.assertEquals((short) 0x02, tlv0.getLength());
    Assert.assertArrayEquals(HexUtil.toByteArray("ce34"), tlv0.getValue());

    // a sample message payload TLV
    buffer0 = BufferHelper.createBuffer(
            "0424002f4f4d4720492077616e7420746f207365652022546865204372617a69657322206c6f6f6b73207369636b21203d5d20");
    tlv0 = ChannelBufferUtil.readTlv(buffer0);
    // OMG I want to see "The Crazies" looks sick! =]
    Assert.assertEquals(0, buffer0.readableBytes());
    Assert.assertEquals((short) 0x0424, tlv0.getTag());
    Assert.assertEquals((short) 0x2f, tlv0.getLength());
    // convert bytes to actual chars
    Assert.assertEquals("OMG I want to see \"The Crazies\" looks sick! =] ", new String(tlv0.getValue()));

    // multiple TLVs in a row
    buffer0 = BufferHelper.createBuffer("000e000101000600010104240001");
    tlv0 = ChannelBufferUtil.readTlv(buffer0);
    Assert.assertEquals(9, buffer0.readableBytes());
    Assert.assertEquals((short) 0x0e, tlv0.getTag());
    Assert.assertEquals((short) 0x01, tlv0.getLength());
    Assert.assertArrayEquals(HexUtil.toByteArray("01"), tlv0.getValue());

    tlv0 = ChannelBufferUtil.readTlv(buffer0);
    Assert.assertEquals(4, buffer0.readableBytes());
    Assert.assertEquals((short) 0x06, tlv0.getTag());
    Assert.assertEquals((short) 0x01, tlv0.getLength());
    Assert.assertArrayEquals(HexUtil.toByteArray("01"), tlv0.getValue());

    try {
        // this should error out since we don't have enough bytes
        tlv0 = ChannelBufferUtil.readTlv(buffer0);
        Assert.fail();
    } catch (NotEnoughDataInBufferException e) {
        // correct behavior
        Assert.assertEquals(0, buffer0.readableBytes());
    }

    // a TLV with an unsigned short length (1 above 15-bit integer)
    StringBuilder buf = new StringBuilder(40000);
    buf.append("FFFF8000");
    for (int i = 0; i < 0x8000; i++) {
        buf.append("01");
    }
    buffer0 = BufferHelper.createBuffer(buf.toString());
    tlv0 = ChannelBufferUtil.readTlv(buffer0);
    Assert.assertEquals(0, buffer0.readableBytes());
    Assert.assertEquals((short) 0xffff, tlv0.getTag());
    Assert.assertEquals(32768, tlv0.getUnsignedLength());
    Assert.assertEquals(-32768, tlv0.getLength()); // the "signed" version of the length

    // a TLV with an unsigned short length (1 above 15-bit integer)
    buf = new StringBuilder(70000);
    buf.append("FFFFFFFF");
    for (int i = 0; i < 0xFFFF; i++) {
        buf.append("02");
    }
    buffer0 = BufferHelper.createBuffer(buf.toString());
    tlv0 = ChannelBufferUtil.readTlv(buffer0);
    Assert.assertEquals(0, buffer0.readableBytes());
    Assert.assertEquals((short) 0xffff, tlv0.getTag());
    Assert.assertEquals(-1, tlv0.getLength()); // the "signed" version of the length
}

---

From source file:com.cloudhopper.smpp.util.ChannelBufferUtilTest.java

License:Apache License

@Test
public void readAddress() throws Exception {
    Address addr0 = null;//from ww  w.  j a  v  a2  s.co m
    ByteBuf buffer0 = null;

    buffer0 = BufferHelper.createBuffer("021000");
    addr0 = ChannelBufferUtil.readAddress(buffer0);
    Assert.assertEquals(0x02, addr0.getTon());
    Assert.assertEquals(0x10, addr0.getNpi());
    Assert.assertEquals("", addr0.getAddress());
    Assert.assertEquals(0, buffer0.readableBytes());

    // same, but one extra byte shouldn't be read
    buffer0 = BufferHelper.createBuffer("02100000");
    addr0 = ChannelBufferUtil.readAddress(buffer0);
    Assert.assertEquals(0x02, addr0.getTon());
    Assert.assertEquals(0x10, addr0.getNpi());
    Assert.assertEquals("", addr0.getAddress());
    Assert.assertEquals(1, buffer0.readableBytes());

    buffer0 = BufferHelper.createBuffer("02104142434400");
    addr0 = ChannelBufferUtil.readAddress(buffer0);
    Assert.assertEquals(0x02, addr0.getTon());
    Assert.assertEquals(0x10, addr0.getNpi());
    Assert.assertEquals("ABCD", addr0.getAddress());
    Assert.assertEquals(0, buffer0.readableBytes());
}

---

From source file:com.cmz.http.upload.HttpUploadServerHandler.java

License:Apache License

private void writeResponse(Channel channel) {
    // Convert the response content to a ChannelBuffer.
    ByteBuf buf = copiedBuffer(responseContent.toString(), CharsetUtil.UTF_8);
    responseContent.setLength(0);//from  www  .j a va2s .  c  o  m

    // Decide whether to close the connection or not.
    boolean close = request.headers().contains(HttpHeaderNames.CONNECTION, HttpHeaderValues.CLOSE, true)
            || request.protocolVersion().equals(HttpVersion.HTTP_1_0) && !request.headers()
                    .contains(HttpHeaderNames.CONNECTION, HttpHeaderValues.KEEP_ALIVE, true);

    // Build the response object.
    FullHttpResponse response = new DefaultFullHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.OK, buf);
    response.headers().set(HttpHeaderNames.CONTENT_TYPE, "text/plain; charset=UTF-8");

    if (!close) {
        // There's no need to add 'Content-Length' header
        // if this is the last response.
        response.headers().setInt(HttpHeaderNames.CONTENT_LENGTH, buf.readableBytes());
    }

    Set<Cookie> cookies;
    String value = request.headers().get(HttpHeaderNames.COOKIE);
    if (value == null) {
        cookies = Collections.emptySet();
    } else {
        cookies = ServerCookieDecoder.STRICT.decode(value);
    }
    if (!cookies.isEmpty()) {
        // Reset the cookies if necessary.
        for (Cookie cookie : cookies) {
            response.headers().add(HttpHeaderNames.SET_COOKIE, ServerCookieEncoder.STRICT.encode(cookie));
        }
    }
    // Write the response.
    ChannelFuture future = channel.writeAndFlush(response);
    // Close the connection after the write operation is done if necessary.
    if (close) {
        future.addListener(ChannelFutureListener.CLOSE);
    }
}

---

From source file:com.cmz.http.upload.HttpUploadServerHandler.java

License:Apache License

private void writeMenu(ChannelHandlerContext ctx) {
    // print several HTML forms
    // Convert the response content to a ChannelBuffer.
    responseContent.setLength(0);//  w w w.j  a va2  s.co  m

    // create Pseudo Menu
    responseContent.append("<html>");
    responseContent.append("<head>");
    responseContent.append("<title>Netty Test Form</title>\r\n");
    responseContent.append("</head>\r\n");
    responseContent.append("<body bgcolor=white><style>td{font-size: 12pt;}</style>");

    responseContent.append("<table border=\"0\">");
    responseContent.append("<tr>");
    responseContent.append("<td>");
    responseContent.append("<h1>Netty Test Form</h1>");
    responseContent.append("Choose one FORM");
    responseContent.append("</td>");
    responseContent.append("</tr>");
    responseContent.append("</table>\r\n");

    // GET
    responseContent.append("<CENTER>GET FORM<HR WIDTH=\"75%\" NOSHADE color=\"blue\"></CENTER>");
    responseContent.append("<FORM ACTION=\"/formget\" METHOD=\"GET\">");
    responseContent.append("<input type=hidden name=getform value=\"GET\">");
    responseContent.append("<table border=\"0\">");
    responseContent.append("<tr><td>Fill with value: <br> <input type=text name=\"info\" size=10></td></tr>");
    responseContent.append("<tr><td>Fill with value: <br> <input type=text name=\"secondinfo\" size=20>");
    responseContent
            .append("<tr><td>Fill with value: <br> <textarea name=\"thirdinfo\" cols=40 rows=10></textarea>");
    responseContent.append("</td></tr>");
    responseContent.append("<tr><td><INPUT TYPE=\"submit\" NAME=\"Send\" VALUE=\"Send\"></INPUT></td>");
    responseContent.append("<td><INPUT TYPE=\"reset\" NAME=\"Clear\" VALUE=\"Clear\" ></INPUT></td></tr>");
    responseContent.append("</table></FORM>\r\n");
    responseContent.append("<CENTER><HR WIDTH=\"75%\" NOSHADE color=\"blue\"></CENTER>");

    // POST
    responseContent.append("<CENTER>POST FORM<HR WIDTH=\"75%\" NOSHADE color=\"blue\"></CENTER>");
    responseContent.append("<FORM ACTION=\"/formpost\" METHOD=\"POST\">");
    responseContent.append("<input type=hidden name=getform value=\"POST\">");
    responseContent.append("<table border=\"0\">");
    responseContent.append("<tr><td>Fill with value: <br> <input type=text name=\"info\" size=10></td></tr>");
    responseContent.append("<tr><td>Fill with value: <br> <input type=text name=\"secondinfo\" size=20>");
    responseContent
            .append("<tr><td>Fill with value: <br> <textarea name=\"thirdinfo\" cols=40 rows=10></textarea>");
    responseContent.append("<tr><td>Fill with file (only file name will be transmitted): <br> "
            + "<input type=file name=\"myfile\">");
    responseContent.append("</td></tr>");
    responseContent.append("<tr><td><INPUT TYPE=\"submit\" NAME=\"Send\" VALUE=\"Send\"></INPUT></td>");
    responseContent.append("<td><INPUT TYPE=\"reset\" NAME=\"Clear\" VALUE=\"Clear\" ></INPUT></td></tr>");
    responseContent.append("</table></FORM>\r\n");
    responseContent.append("<CENTER><HR WIDTH=\"75%\" NOSHADE color=\"blue\"></CENTER>");

    // POST with enctype="multipart/form-data"
    responseContent.append("<CENTER>POST MULTIPART FORM<HR WIDTH=\"75%\" NOSHADE color=\"blue\"></CENTER>");
    responseContent
            .append("<FORM ACTION=\"/formpostmultipart\" ENCTYPE=\"multipart/form-data\" METHOD=\"POST\">");
    responseContent.append("<input type=hidden name=getform value=\"POST\">");
    responseContent.append("<table border=\"0\">");
    responseContent.append("<tr><td>Fill with value: <br> <input type=text name=\"info\" size=10></td></tr>");
    responseContent.append("<tr><td>Fill with value: <br> <input type=text name=\"secondinfo\" size=20>");
    responseContent
            .append("<tr><td>Fill with value: <br> <textarea name=\"thirdinfo\" cols=40 rows=10></textarea>");
    responseContent.append("<tr><td>Fill with file: <br> <input type=file name=\"myfile\">");
    responseContent.append("</td></tr>");
    responseContent.append("<tr><td><INPUT TYPE=\"submit\" NAME=\"Send\" VALUE=\"Send\"></INPUT></td>");
    responseContent.append("<td><INPUT TYPE=\"reset\" NAME=\"Clear\" VALUE=\"Clear\" ></INPUT></td></tr>");
    responseContent.append("</table></FORM>\r\n");
    responseContent.append("<CENTER><HR WIDTH=\"75%\" NOSHADE color=\"blue\"></CENTER>");

    responseContent.append("</body>");
    responseContent.append("</html>");

    ByteBuf buf = copiedBuffer(responseContent.toString(), CharsetUtil.UTF_8);
    // Build the response object.
    FullHttpResponse response = new DefaultFullHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.OK, buf);

    response.headers().set(HttpHeaderNames.CONTENT_TYPE, "text/html; charset=UTF-8");
    response.headers().setInt(HttpHeaderNames.CONTENT_LENGTH, buf.readableBytes());

    // Write the response.
    ctx.channel().writeAndFlush(response);
}

---

From source file:com.cmz.http.websocketx.benchmarkserver.WebSocketServerHandler.java

License:Apache License

private void handleHttpRequest(ChannelHandlerContext ctx, FullHttpRequest req) {
    // Handle a bad request.
    if (!req.decoderResult().isSuccess()) {
        sendHttpResponse(ctx, req, new DefaultFullHttpResponse(HTTP_1_1, BAD_REQUEST));
        return;//w w  w. j av a2s. c  o  m
    }

    // Allow only GET methods.
    if (req.method() != GET) {
        sendHttpResponse(ctx, req, new DefaultFullHttpResponse(HTTP_1_1, FORBIDDEN));
        return;
    }

    // Send the demo page and favicon.ico
    if ("/".equals(req.uri())) {
        ByteBuf content = WebSocketServerBenchmarkPage.getContent(getWebSocketLocation(req));
        FullHttpResponse res = new DefaultFullHttpResponse(HTTP_1_1, OK, content);

        res.headers().set(HttpHeaderNames.CONTENT_TYPE, "text/html; charset=UTF-8");
        HttpUtil.setContentLength(res, content.readableBytes());

        sendHttpResponse(ctx, req, res);
        return;
    }
    if ("/favicon.ico".equals(req.uri())) {
        FullHttpResponse res = new DefaultFullHttpResponse(HTTP_1_1, NOT_FOUND);
        sendHttpResponse(ctx, req, res);
        return;
    }

    // Handshake
    WebSocketServerHandshakerFactory wsFactory = new WebSocketServerHandshakerFactory(getWebSocketLocation(req),
            null, true, 5 * 1024 * 1024);
    handshaker = wsFactory.newHandshaker(req);
    if (handshaker == null) {
        WebSocketServerHandshakerFactory.sendUnsupportedVersionResponse(ctx.channel());
    } else {
        handshaker.handshake(ctx.channel(), req);
    }
}

---

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