Examples with CONTENT_TYPE io.netty.handler.codec.http.HttpHeaders.Names.CONTENT_TYPE used on opensource projects

Example 1 with CONTENT_TYPE

use of io.netty.handler.codec.http.HttpHeaders.Names.CONTENT_TYPE in project flink by apache.

the class HandlerUtils method transferFile.

public static void transferFile(ChannelHandlerContext ctx, File file, HttpRequest httpRequest) throws FlinkException {
    final RandomAccessFile randomAccessFile;
    try {
        randomAccessFile = new RandomAccessFile(file, "r");
    } catch (FileNotFoundException e) {
        throw new FlinkException("Can not find file " + file + ".", e);
    }
    try {
        final long fileLength = randomAccessFile.length();
        final FileChannel fileChannel = randomAccessFile.getChannel();
        try {
            HttpResponse response = new DefaultHttpResponse(HTTP_1_1, OK);
            response.headers().set(CONTENT_TYPE, "text/plain");
            if (HttpHeaders.isKeepAlive(httpRequest)) {
                response.headers().set(CONNECTION, HttpHeaders.Values.KEEP_ALIVE);
            }
            HttpHeaders.setContentLength(response, fileLength);
            // write the initial line and the header.
            ctx.write(response);
            // write the content.
            final ChannelFuture lastContentFuture;
            final GenericFutureListener<Future<? super Void>> completionListener = future -> {
                fileChannel.close();
                randomAccessFile.close();
            };
            if (ctx.pipeline().get(SslHandler.class) == null) {
                ctx.write(new DefaultFileRegion(fileChannel, 0, fileLength), ctx.newProgressivePromise()).addListener(completionListener);
                lastContentFuture = ctx.writeAndFlush(LastHttpContent.EMPTY_LAST_CONTENT);
            } else {
                lastContentFuture = ctx.writeAndFlush(new HttpChunkedInput(new ChunkedFile(randomAccessFile, 0, fileLength, 8192)), ctx.newProgressivePromise()).addListener(completionListener);
            // HttpChunkedInput will write the end marker (LastHttpContent) for us.
            }
            // close the connection, if no keep-alive is needed
            if (!HttpHeaders.isKeepAlive(httpRequest)) {
                lastContentFuture.addListener(ChannelFutureListener.CLOSE);
            }
        } catch (IOException ex) {
            fileChannel.close();
            throw ex;
        }
    } catch (IOException ioe) {
        try {
            randomAccessFile.close();
        } catch (IOException e) {
            throw new FlinkException("Close file or channel error.", e);
        }
        throw new FlinkException("Could not transfer file " + file + " to the client.", ioe);
    }
}