Examples of io.netty.channel.DefaultFileRegion

io.netty.channel.DefaultFileRegion
Default {@link FileRegion} implementation which transfer data from a {@link FileChannel}.

        if(attachment){
            this.headers().set("Content-Disposition", "attachment; filename=\"" + file.getName() + "\"");
        }
        this.headers().set(HttpHeaders.Names.CONTENT_TYPE, URLConnection.getFileNameMap().getContentTypeFor(file.getName()));
        context.write(this);
        context.channel().write(new DefaultFileRegion(new FileInputStream(file).getChannel(), 0, file.length()));
    }

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                // was not able to write everything so break here we will get notified later again once
                // the network stack can handle more writes.
                return false;
            }
        } else if (msg instanceof DefaultFileRegion) {
            DefaultFileRegion region = (DefaultFileRegion) msg;
            if (!writeFileRegion(in, region)) {
                // was not able to write everything so break here we will get notified later again once
                // the network stack can handle more writes.
                return false;
            }

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        if (request.getHeaders().isKeepAlive()) {
            response.getHeaders().set(CONNECTION, KEEP_ALIVE);
        }
        
        if (response.getChannel().pipeline().get(SslHandler.class) == null) {
            response.writeFileRegion(new DefaultFileRegion(raf.getChannel(), 0, fileLength));
        }
        else {
            try {
                response.writeChunkedInput(new HttpChunkedInput(new ChunkedFile(raf, 0, fileLength, CHUNK_SIZE)));
            } catch (IOException e) {

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        return;
      }
      int len = (int) length;
      ctx.write((new FileHeader(len, blockId)).buffer());
      try {
        ctx.write(new DefaultFileRegion(new FileInputStream(file)
          .getChannel(), fileSegment.offset(), fileSegment.length()));
      } catch (Exception e) {
          LOG.error("Exception: ", e);
      }
    } else {

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                if (!file.isFile()) {
                    ctx.write("Not a file: " + file + '\n');
                    return;
                }
                ctx.write(file + " " + file.length() + '\n');
                ctx.sendFile(new DefaultFileRegion(new FileInputStream(file).getChannel(), 0, file.length()));
                ctx.write("\n");
            } else {
                ctx.write("File not found: " + file + '\n');
            }
        }

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            // Cannot use zero-copy with HTTPS.
            writeFuture = ch.write(new ChunkedFile(raf, 0, fileLength, 8192));
        } else {
            // No encryption - use zero-copy.
            final FileRegion region =
                new DefaultFileRegion(raf.getChannel(), 0, fileLength);
            writeFuture = ch.write(region);
            writeFuture.addListener(new ChannelFutureProgressListener() {
                @Override
                public void operationComplete(ChannelFuture future) {
                    region.releaseExternalResources();
                }


                @Override
                public void operationProgressed(
                        ChannelFuture future, long amount, long current, long total) {

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        // Write the content.
        ChannelFuture sendFileFuture;
        if (ctx.pipeline().get(SslHandler.class) == null) {
            sendFileFuture =
                    ctx.write(new DefaultFileRegion(raf.getChannel(), 0, fileLength), ctx.newProgressivePromise());
        } else {
            sendFileFuture =
                    ctx.write(new HttpChunkedInput(new ChunkedFile(raf, 0, fileLength, 8192)),
                            ctx.newProgressivePromise());
        }

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                // was not able to write everything so break here we will get notified later again once
                // the network stack can handle more writes.
                return false;
            }
        } else if (msg instanceof DefaultFileRegion) {
            DefaultFileRegion region = (DefaultFileRegion) msg;
            if (!writeFileRegion(in, region)) {
                // was not able to write everything so break here we will get notified later again once
                // the network stack can handle more writes.
                return false;
            }

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                response.headers().set(HttpHeaders.Names.CONNECTION, HttpHeaders.Values.KEEP_ALIVE);
            }
            ctx.write(response);


            if (ctx.pipeline().get(SslHandler.class) == null) {
                ctx.write(new DefaultFileRegion(file.getChannel(), 0, file.length()));
            } else {
                ctx.write(new ChunkedNioFile(file.getChannel()));
            }
            ChannelFuture future = ctx.writeAndFlush(LastHttpContent.EMPTY_LAST_CONTENT);
            if (!keepAlive) {

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    // Write the content.
    ChannelFuture sendFileFuture;
    if (useSendFile) {
      sendFileFuture =
        ctx.write(new DefaultFileRegion(raf.getChannel(), 0, fileLength), ctx.newProgressivePromise());
    } else {
      sendFileFuture =
        ctx.write(new ChunkedFile(raf, 0, fileLength, 8192), ctx.newProgressivePromise());
    }

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