Java Code Examples for io.netty.channel.FileRegion#transferTo()

@Override
protected void doWriteFileRegion(FileRegion region) throws Exception {
    OutputStream os = this.os;
    if (os == null) {
        throw new NotYetConnectedException();
    }
    if (outChannel == null) {
        outChannel = Channels.newChannel(os);
    }

    long written = 0;
    for (;;) {
        long localWritten = region.transferTo(outChannel, written);
        if (localWritten == -1) {
            checkEOF(region);
            return;
        }
        written += localWritten;

        if (written >= region.count()) {
            return;
        }
    }
}
 

/**
 * Write a {@link FileRegion}
 * @param in the collection which contains objects to write.
 * @param region the {@link FileRegion} from which the bytes should be written
 * @return The value that should be decremented from the write quantum which starts at
 * {@link ChannelConfig#getWriteSpinCount()}. The typical use cases are as follows:
 * <ul>
 *     <li>0 - if no write was attempted. This is appropriate if an empty {@link ByteBuf} (or other empty content)
 *     is encountered</li>
 *     <li>1 - if a single call to write data was made to the OS</li>
 *     <li>{@link ChannelUtils#WRITE_STATUS_SNDBUF_FULL} - if an attempt to write data was made to the OS, but no
 *     data was accepted</li>
 * </ul>
 */
private int writeFileRegion(ChannelOutboundBuffer in, FileRegion region) throws Exception {
    if (region.transferred() >= region.count()) {
        in.remove();
        return 0;
    }

    if (byteChannel == null) {
        byteChannel = new KQueueSocketWritableByteChannel();
    }
    final long flushedAmount = region.transferTo(byteChannel, region.transferred());
    if (flushedAmount > 0) {
        in.progress(flushedAmount);
        if (region.transferred() >= region.count()) {
            in.remove();
        }
        return 1;
    }
    return WRITE_STATUS_SNDBUF_FULL;
}
 

/**
 * Write a {@link FileRegion}
 * @param in the collection which contains objects to write.
 * @param region the {@link FileRegion} from which the bytes should be written
 * @return The value that should be decremented from the write quantum which starts at
 * {@link ChannelConfig#getWriteSpinCount()}. The typical use cases are as follows:
 * <ul>
 *     <li>0 - if no write was attempted. This is appropriate if an empty {@link ByteBuf} (or other empty content)
 *     is encountered</li>
 *     <li>1 - if a single call to write data was made to the OS</li>
 *     <li>{@link ChannelUtils#WRITE_STATUS_SNDBUF_FULL} - if an attempt to write data was made to the OS, but
 *     no data was accepted</li>
 * </ul>
 */
private int writeFileRegion(ChannelOutboundBuffer in, FileRegion region) throws Exception {
    if (region.transferred() >= region.count()) {
        in.remove();
        return 0;
    }

    if (byteChannel == null) {
        byteChannel = new EpollSocketWritableByteChannel();
    }
    final long flushedAmount = region.transferTo(byteChannel, region.transferred());
    if (flushedAmount > 0) {
        in.progress(flushedAmount);
        if (region.transferred() >= region.count()) {
            in.remove();
        }
        return 1;
    }
    return WRITE_STATUS_SNDBUF_FULL;
}
 

@Override
protected void doWriteFileRegion(FileRegion region) throws Exception {
    OutputStream os = this.os;
    if (os == null) {
        throw new NotYetConnectedException();
    }
    if (outChannel == null) {
        outChannel = Channels.newChannel(os);
    }

    long written = 0;
    for (;;) {
        long localWritten = region.transferTo(outChannel, written);
        if (localWritten == -1) {
            checkEOF(region);
            return;
        }
        written += localWritten;

        if (written >= region.count()) {
            return;
        }
    }
}
 

/**
 * Encode a message into a {@link io.netty.buffer.ByteBuf}. This method will be called for each written message that
 * can be handled by this encoder.
 *
 * @param ctx the {@link io.netty.channel.ChannelHandlerContext} which this {@link
 * io.netty.handler.codec.MessageToByteEncoder} belongs to
 * @param msg the message to encode
 * @param out the {@link io.netty.buffer.ByteBuf} into which the encoded message will be written
 * @throws Exception is thrown if an error occurs
 */
@Override
protected void encode(ChannelHandlerContext ctx, FileRegion msg, final ByteBuf out) throws Exception {
    WritableByteChannel writableByteChannel = new WritableByteChannel() {
        @Override
        public int write(ByteBuffer src) throws IOException {
            out.writeBytes(src);
            return out.capacity();
        }

        @Override
        public boolean isOpen() {
            return true;
        }

        @Override
        public void close() throws IOException {
        }
    };

    long toTransfer = msg.count();

    while (true) {
        long transferred = msg.transfered();
        if (toTransfer - transferred <= 0) {
            break;
        }
        msg.transferTo(writableByteChannel, transferred);
    }
}
 

/**
 * Encode a message into a {@link io.netty.buffer.ByteBuf}. This method will be called for each written message that
 * can be handled by this encoder.将消息编码到ByteBuf中。对于可由此编码器处理的每个书面消息，将调用此方法。
 *
 * @param ctx the {@link io.netty.channel.ChannelHandlerContext} which this {@link
 * io.netty.handler.codec.MessageToByteEncoder} belongs to
 * @param msg the message to encode
 * @param out the {@link io.netty.buffer.ByteBuf} into which the encoded message will be written
 * @throws Exception is thrown if an error occurs
 */
@Override
protected void encode(ChannelHandlerContext ctx, FileRegion msg, final ByteBuf out) throws Exception {
    WritableByteChannel writableByteChannel = new WritableByteChannel() {
        @Override
        public int write(ByteBuffer src) throws IOException {
            out.writeBytes(src);
            return out.capacity();
        }

        @Override
        public boolean isOpen() {
            return true;
        }

        @Override
        public void close() throws IOException {
        }
    };

    long toTransfer = msg.count();

    while (true) {
        long transferred = msg.transfered();
        if (toTransfer - transferred <= 0) {
            break;
        }
        msg.transferTo(writableByteChannel, transferred);
    }
}
 

/**
 * Encode a message into a {@link io.netty.buffer.ByteBuf}. This method will be called for each written message that
 * can be handled by this encoder.
 *
 * @param ctx the {@link io.netty.channel.ChannelHandlerContext} which this {@link
 * io.netty.handler.codec.MessageToByteEncoder} belongs to
 * @param msg the message to encode
 * @param out the {@link io.netty.buffer.ByteBuf} into which the encoded message will be written
 * @throws Exception is thrown if an error occurs
 */
@Override
protected void encode(ChannelHandlerContext ctx, FileRegion msg, final ByteBuf out) throws Exception {
    WritableByteChannel writableByteChannel = new WritableByteChannel() {
        @Override
        public int write(ByteBuffer src) throws IOException {
            out.writeBytes(src);
            return out.capacity();
        }

        @Override
        public boolean isOpen() {
            return true;
        }

        @Override
        public void close() throws IOException {
        }
    };

    long toTransfer = msg.count();

    while (true) {
        long transferred = msg.transfered();
        if (toTransfer - transferred <= 0) {
            break;
        }
        msg.transferTo(writableByteChannel, transferred);
    }
}
 

/**
 * Encode a message into a {@link io.netty.buffer.ByteBuf}. This method will be called for each written message that
 * can be handled by this encoder.
 *
 * @param ctx the {@link io.netty.channel.ChannelHandlerContext} which this {@link
 * io.netty.handler.codec.MessageToByteEncoder} belongs to
 * @param msg the message to encode
 * @param out the {@link io.netty.buffer.ByteBuf} into which the encoded message will be written
 * @throws Exception is thrown if an error occurs
 */
@Override
protected void encode(ChannelHandlerContext ctx, FileRegion msg, final ByteBuf out) throws Exception {
    WritableByteChannel writableByteChannel = new WritableByteChannel() {
        @Override
        public int write(ByteBuffer src) throws IOException {
            out.writeBytes(src);
            return out.capacity();
        }

        @Override
        public boolean isOpen() {
            return true;
        }

        @Override
        public void close() throws IOException {
        }
    };

    long toTransfer = msg.count();

    while (true) {
        long transferred = msg.transfered();
        if (toTransfer - transferred <= 0) {
            break;
        }
        msg.transferTo(writableByteChannel, transferred);
    }
}
 

/**
 * Encode a message into a {@link io.netty.buffer.ByteBuf}. This method will be called for each written message that
 * can be handled by this encoder.
 *
 * @param ctx the {@link io.netty.channel.ChannelHandlerContext} which this {@link
 * io.netty.handler.codec.MessageToByteEncoder} belongs to
 * @param msg the message to encode
 * @param out the {@link io.netty.buffer.ByteBuf} into which the encoded message will be written
 * @throws Exception is thrown if an error occurs
 */
@Override
protected void encode(ChannelHandlerContext ctx, FileRegion msg, final ByteBuf out) throws Exception {
    WritableByteChannel writableByteChannel = new WritableByteChannel() {
        @Override
        public int write(ByteBuffer src) throws IOException {
            out.writeBytes(src);
            return out.capacity();
        }

        @Override
        public boolean isOpen() {
            return true;
        }

        @Override
        public void close() throws IOException {
        }
    };

    long toTransfer = msg.count();

    while (true) {
        long transferred = msg.transfered();
        if (toTransfer - transferred <= 0) {
            break;
        }
        msg.transferTo(writableByteChannel, transferred);
    }
}
 

@Override
protected long doWriteFileRegion(FileRegion region) throws Exception {
    final long position = region.transferred();
    return region.transferTo(javaChannel(), position);
}
 

@Override
public void handleMessage(Object msg) {
    try {
        //log.info("Got message: " + msg.getClass().getName());

        if (msg instanceof HttpResponse) {
            HttpResponse res = (HttpResponse) msg;
            responseBuilder.setStatusCode(res.status().code());

            if (request.getRequestSource() == AwsProxyRequest.RequestSource.ALB) {
                responseBuilder.setStatusDescription(res.status().reasonPhrase());
            }
            responseBuilder.setMultiValueHeaders(new Headers());
            for (String name : res.headers().names()) {
                for (String v : res.headers().getAll(name)) {
                    responseBuilder.getMultiValueHeaders().add(name, v);
                }
            }
        }
        if (msg instanceof HttpContent) {
            HttpContent content = (HttpContent) msg;
            int readable = content.content().readableBytes();
            if (baos == null && readable > 0) {
                baos = createByteStream();
            }
            for (int i = 0; i < readable; i++) {
                baos.write(content.content().readByte());
            }
        }
        if (msg instanceof FileRegion) {
            FileRegion file = (FileRegion) msg;
            if (file.count() > 0 && file.transferred() < file.count()) {
                if (baos == null)
                    baos = createByteStream();
                if (byteChannel == null)
                    byteChannel = Channels.newChannel(baos);
                file.transferTo(byteChannel, file.transferred());
            }
        }
        if (msg instanceof LastHttpContent) {
            if (baos != null) {
                if (isBinary(responseBuilder.getMultiValueHeaders().getFirst("Content-Type"))) {
                    responseBuilder.setBase64Encoded(true);
                    responseBuilder.setBody(Base64.getMimeEncoder().encodeToString(baos.toByteArray()));
                } else {
                    responseBuilder.setBody(new String(baos.toByteArray(), "UTF-8"));
                }
            }
            future.complete(responseBuilder);
        }
    } catch (Throwable ex) {
        future.completeExceptionally(ex);
    } finally {
        if (msg != null) {
            ReferenceCountUtil.release(msg);
        }
    }
}
 

@Override
public void handleMessage(Object msg) {
    try {
        //log.info("Got message: " + msg.getClass().getName());

        if (msg instanceof HttpResponse) {
            HttpResponse res = (HttpResponse) msg;
            responseBuilder = request.createResponseBuilder(HttpStatus.valueOf(res.status().code()));
            for (Map.Entry<String, String> entry : res.headers()) {
                responseBuilder.header(entry.getKey(), entry.getValue());
            }
        }
        if (msg instanceof HttpContent) {
            HttpContent content = (HttpContent) msg;
            if (baos == null) {
                // todo what is right size?
                baos = createByteStream();
            }
            int readable = content.content().readableBytes();
            for (int i = 0; i < readable; i++) {
                baos.write(content.content().readByte());
            }
        }
        if (msg instanceof FileRegion) {
            FileRegion file = (FileRegion) msg;
            if (file.count() > 0 && file.transferred() < file.count()) {
                if (baos == null)
                    baos = createByteStream();
                if (byteChannel == null)
                    byteChannel = Channels.newChannel(baos);
                file.transferTo(byteChannel, file.transferred());
            }
        }
        if (msg instanceof LastHttpContent) {
            responseBuilder.body(baos.toByteArray());
            future.complete(responseBuilder.build());
        }
    } catch (Throwable ex) {
        future.completeExceptionally(ex);
    } finally {
        ReferenceCountUtil.release(msg);
    }
}
 

@Override
protected long doWriteFileRegion(FileRegion region) throws Exception {
    final long position = region.transfered();
    return region.transferTo(javaChannel(), position);
}