Example usage for io.netty.handler.codec.http.multipart DiskFileUpload renameTo

Introduction

In this page you can find the example usage for io.netty.handler.codec.http.multipart DiskFileUpload renameTo.

Prototype

@Override
    public boolean renameTo(File dest) throws IOException 

Source Link

Usage

From source file:org.apache.flink.runtime.webmonitor.HttpRequestHandler.java

License:Apache License

@Override
public void channelRead0(ChannelHandlerContext ctx, HttpObject msg) {
    try {/* w ww .  jav  a  2  s .  c om*/
        if (msg instanceof HttpRequest) {
            currentRequest = (HttpRequest) msg;
            currentRequestPath = null;

            if (currentDecoder != null) {
                currentDecoder.destroy();
                currentDecoder = null;
            }

            if (currentRequest.getMethod() == HttpMethod.GET
                    || currentRequest.getMethod() == HttpMethod.DELETE) {
                // directly delegate to the router
                ctx.fireChannelRead(currentRequest);
            } else if (currentRequest.getMethod() == HttpMethod.POST) {
                // POST comes in multiple objects. First the request, then the contents
                // keep the request and path for the remaining objects of the POST request
                currentRequestPath = new QueryStringDecoder(currentRequest.getUri()).path();
                currentDecoder = new HttpPostRequestDecoder(DATA_FACTORY, currentRequest);
            } else {
                throw new IOException("Unsupported HTTP method: " + currentRequest.getMethod().name());
            }
        } else if (currentDecoder != null && msg instanceof HttpContent) {
            // received new chunk, give it to the current decoder
            HttpContent chunk = (HttpContent) msg;
            currentDecoder.offer(chunk);

            try {
                while (currentDecoder.hasNext()) {
                    InterfaceHttpData data = currentDecoder.next();

                    // IF SOMETHING EVER NEEDS POST PARAMETERS, THIS WILL BE THE PLACE TO HANDLE IT
                    // all fields values will be passed with type Attribute.

                    if (data.getHttpDataType() == HttpDataType.FileUpload) {
                        DiskFileUpload file = (DiskFileUpload) data;
                        if (file.isCompleted()) {
                            String name = file.getFilename();

                            File target = new File(tmpDir, UUID.randomUUID() + "_" + name);
                            file.renameTo(target);

                            QueryStringEncoder encoder = new QueryStringEncoder(currentRequestPath);
                            encoder.addParam("filepath", target.getAbsolutePath());
                            encoder.addParam("filename", name);

                            currentRequest.setUri(encoder.toString());
                        }
                    }

                    data.release();
                }
            } catch (EndOfDataDecoderException ignored) {
            }

            if (chunk instanceof LastHttpContent) {
                HttpRequest request = currentRequest;
                currentRequest = null;
                currentRequestPath = null;

                currentDecoder.destroy();
                currentDecoder = null;

                // fire next channel handler
                ctx.fireChannelRead(request);
            }
        }
    } catch (Throwable t) {
        currentRequest = null;
        currentRequestPath = null;

        if (currentDecoder != null) {
            currentDecoder.destroy();
            currentDecoder = null;
        }

        if (ctx.channel().isActive()) {
            byte[] bytes = ExceptionUtils.stringifyException(t).getBytes(ENCODING);

            DefaultFullHttpResponse response = new DefaultFullHttpResponse(HttpVersion.HTTP_1_1,
                    HttpResponseStatus.INTERNAL_SERVER_ERROR, Unpooled.wrappedBuffer(bytes));

            response.headers().set(HttpHeaders.Names.CONTENT_ENCODING, "utf-8");
            response.headers().set(HttpHeaders.Names.CONTENT_TYPE, "text/plain");
            response.headers().set(HttpHeaders.Names.CONTENT_LENGTH, response.content().readableBytes());

            ctx.writeAndFlush(response);
        }
    }
}

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