Examples of io.netty.handler.codec.http.DefaultFullHttpResponse

io.netty.handler.codec.http.DefaultFullHttpResponse
Default implementation of a {@link FullHttpResponse}.

    public void channelRead(ChannelHandlerContext ctx, Object msg) {
        if (msg instanceof HttpRequest) {
            HttpRequest req = (HttpRequest) msg;


            if (HttpHeaderUtil.is100ContinueExpected(req)) {
                ctx.write(new DefaultFullHttpResponse(HTTP_1_1, CONTINUE));
            }
            boolean keepAlive = HttpHeaderUtil.isKeepAlive(req);
            FullHttpResponse response = new DefaultFullHttpResponse(HTTP_1_1, OK, Unpooled.wrappedBuffer(CONTENT));
            response.headers().set(CONTENT_TYPE, "text/plain");
            response.headers().set(CONTENT_LENGTH, response.content().readableBytes());


            if (!keepAlive) {
                ctx.write(response).addListener(ChannelFutureListener.CLOSE);
            } else {
                response.headers().set(CONNECTION, Values.KEEP_ALIVE);
                ctx.write(response);
            }
        }
    }

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        boolean close = request.headers().contains(CONNECTION, HttpHeaders.Values.CLOSE, true)
                || request.protocolVersion().equals(HttpVersion.HTTP_1_0)
                && !request.headers().contains(CONNECTION, HttpHeaders.Values.KEEP_ALIVE, true);


        // Build the response object.
        FullHttpResponse response = new DefaultFullHttpResponse(
                HttpVersion.HTTP_1_1, HttpResponseStatus.OK, buf);
        response.headers().set(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().set(CONTENT_LENGTH, buf.readableBytes());
        }


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

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


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

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    private boolean writeResponse(HttpObject currentObj, ChannelHandlerContext ctx) {
        // Decide whether to close the connection or not.
        boolean keepAlive = HttpHeaderUtil.isKeepAlive(request);
        // Build the response object.
        FullHttpResponse response = new DefaultFullHttpResponse(
                HTTP_1_1, currentObj.decoderResult().isSuccess()? OK : BAD_REQUEST,
                Unpooled.copiedBuffer(buf.toString(), CharsetUtil.UTF_8));


        response.headers().set(CONTENT_TYPE, "text/plain; charset=UTF-8");


        if (keepAlive) {
            // Add 'Content-Length' header only for a keep-alive connection.
            response.headers().set(CONTENT_LENGTH, response.content().readableBytes());
            // Add keep alive header as per:
            // - http://www.w3.org/Protocols/HTTP/1.1/draft-ietf-http-v11-spec-01.html#Connection
            response.headers().set(CONNECTION, HttpHeaders.Values.KEEP_ALIVE);
        }


        // Encode the cookie.
        String cookieString = request.headers().get(COOKIE);
        if (cookieString != null) {
            Set<Cookie> cookies = CookieDecoder.decode(cookieString);
            if (!cookies.isEmpty()) {
                // Reset the cookies if necessary.
                for (Cookie cookie: cookies) {
                    response.headers().add(SET_COOKIE, ServerCookieEncoder.encode(cookie));
                }
            }
        } else {
            // Browser sent no cookie.  Add some.
            response.headers().add(SET_COOKIE, ServerCookieEncoder.encode("key1", "value1"));
            response.headers().add(SET_COOKIE, ServerCookieEncoder.encode("key2", "value2"));
        }


        // Write the response.
        ctx.write(response);

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        return keepAlive;
    }


    private static void send100Continue(ChannelHandlerContext ctx) {
        FullHttpResponse response = new DefaultFullHttpResponse(HTTP_1_1, CONTINUE);
        ctx.write(response);
    }

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    private static FullHttpMessage newHttpResponse(int streamId, Http2Headers http2Headers, boolean validateHttpHeaders)
                    throws Http2Exception {
        HttpResponseStatus status = HttpUtil.parseStatus(http2Headers.status());
        // HTTP/2 does not define a way to carry the version or reason phrase that is included in an HTTP/1.1
        // status line.
        FullHttpMessage msg = new DefaultFullHttpResponse(HttpVersion.HTTP_1_1, status, validateHttpHeaders);
        addHttp2ToHttpHeaders(streamId, http2Headers, msg, false, HEADER_NAME_TRANSLATIONS_RESPONSE);
        return msg;
    }

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public class HelloWorldHttp1Handler extends SimpleChannelInboundHandler<HttpRequest> {


    @Override
    public void messageReceived(ChannelHandlerContext ctx, HttpRequest req) throws Exception {
        if (HttpHeaderUtil.is100ContinueExpected(req)) {
            ctx.write(new DefaultFullHttpResponse(HTTP_1_1, CONTINUE));
        }
        boolean keepAlive = HttpHeaderUtil.isKeepAlive(req);


        ByteBuf content = ctx.alloc().buffer();
        content.writeBytes(HelloWorldHttp2Handler.RESPONSE_BYTES.duplicate());


        FullHttpResponse response = new DefaultFullHttpResponse(HTTP_1_1, OK, content);
        response.headers().set(CONTENT_TYPE, "text/plain; charset=UTF-8");
        response.headers().set(CONTENT_LENGTH, response.content().readableBytes());


        if (!keepAlive) {
            ctx.writeAndFlush(response).addListener(ChannelFutureListener.CLOSE);
        } else {
            response.headers().set(CONNECTION, Values.KEEP_ALIVE);
            ctx.writeAndFlush(response);
        }
    }

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        }
        ctx.fireChannelRead(msg);
    }


    private void handlePreflight(final ChannelHandlerContext ctx, final HttpRequest request) {
        final HttpResponse response = new DefaultFullHttpResponse(request.protocolVersion(), OK);
        if (setOrigin(response)) {
            setAllowMethods(response);
            setAllowHeaders(response);
            setAllowCredentials(response);
            setMaxAge(response);

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        logger.error("Caught error in CorsHandler", cause);
        ctx.fireExceptionCaught(cause);
    }


    private static void forbidden(final ChannelHandlerContext ctx, final HttpRequest request) {
        ctx.writeAndFlush(new DefaultFullHttpResponse(request.protocolVersion(), FORBIDDEN))
                .addListener(ChannelFutureListener.CLOSE);
    }

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        HttpResponseStatus status = HttpResponseStatus.parseLine(headers.get(STATUS));
        HttpVersion version = HttpVersion.valueOf(headers.get(VERSION));
        headers.remove(STATUS);
        headers.remove(VERSION);


        FullHttpResponse res = new DefaultFullHttpResponse(version, status, ctx.alloc().buffer(), validateHeaders);
        for (Map.Entry<String, String> e: responseFrame.headers()) {
            res.headers().add(e.getKey(), e.getValue());
        }


        // The Connection and Keep-Alive headers are no longer valid
        HttpHeaderUtil.setKeepAlive(res, true);


        // Transfer-Encoding header is not valid
        res.headers().remove(HttpHeaders.Names.TRANSFER_ENCODING);
        res.headers().remove(HttpHeaders.Names.TRAILER);


        return res;
    }

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