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

io.netty.handler.codec.http.HttpHeaders
Provides the constants for the standard HTTP header names and values and commonly used utility methods that accesses an {@link HttpMessage}.


        if (!response.getStatus().equals(status)) {
            throw new WebSocketHandshakeException("Invalid handshake response getStatus: " + response.getStatus());
        }


        HttpHeaders headers = response.headers();


        String upgrade = headers.get(Names.UPGRADE);
        if (!Values.WEBSOCKET.equalsIgnoreCase(upgrade)) {
            throw new WebSocketHandshakeException("Invalid handshake response upgrade: "
                    + upgrade);
        }


        String connection = headers.get(Names.CONNECTION);
        if (!Values.UPGRADE.equalsIgnoreCase(connection)) {
            throw new WebSocketHandshakeException("Invalid handshake response connection: "
                    + connection);
        }

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            headerFinalized = true;
        } else {
            throw new ErrorDataEncoderException("Header already encoded");
        }


        HttpHeaders headers = request.headers();
        List<String> contentTypes = headers.getAll(HttpHeaders.Names.CONTENT_TYPE);
        List<String> transferEncoding = headers.getAll(HttpHeaders.Names.TRANSFER_ENCODING);
        if (contentTypes != null) {
            headers.remove(HttpHeaders.Names.CONTENT_TYPE);
            for (String contentType : contentTypes) {
                // "multipart/form-data; boundary=--89421926422648"
                if (contentType.toLowerCase().startsWith(HttpHeaders.Values.MULTIPART_FORM_DATA)) {
                    // ignore
                } else if (contentType.toLowerCase().startsWith(HttpHeaders.Values.APPLICATION_X_WWW_FORM_URLENCODED)) {
                    // ignore
                } else {
                    headers.add(HttpHeaders.Names.CONTENT_TYPE, contentType);
                }
            }
        }
        if (isMultipart) {
            String value = HttpHeaders.Values.MULTIPART_FORM_DATA + "; " + HttpHeaders.Values.BOUNDARY + '='
                    + multipartDataBoundary;
            headers.add(HttpHeaders.Names.CONTENT_TYPE, value);
        } else {
            // Not multipart
            headers.add(HttpHeaders.Names.CONTENT_TYPE, HttpHeaders.Values.APPLICATION_X_WWW_FORM_URLENCODED);
        }
        // Now consider size for chunk or not
        long realSize = globalBodySize;
        if (isMultipart) {
            iterator = multipartHttpDatas.listIterator();
        } else {
            realSize -= 1; // last '&' removed
            iterator = multipartHttpDatas.listIterator();
        }
        headers.set(HttpHeaders.Names.CONTENT_LENGTH, String.valueOf(realSize));
        if (realSize > HttpPostBodyUtil.chunkSize || isMultipart) {
            isChunked = true;
            if (transferEncoding != null) {
                headers.remove(HttpHeaders.Names.TRANSFER_ENCODING);
                for (String v : transferEncoding) {
                    if (v.equalsIgnoreCase(HttpHeaders.Values.CHUNKED)) {
                        // ignore
                    } else {
                        headers.add(HttpHeaders.Names.TRANSFER_ENCODING, v);
                    }
                }
            }
            HttpHeaders.setTransferEncodingChunked(request);
            request.data().clear();

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            String protocol = uri.getScheme();
            if (!"ws".equals(protocol)) {
                throw new IllegalArgumentException("Unsupported protocol: " + protocol);
            }


            HttpHeaders customHeaders = new DefaultHttpHeaders();
            customHeaders.add("MyHeader", "MyValue");


            // Connect with V13 (RFC 6455 aka HyBi-17). You can change it to V08 or V00.
            // If you change it to V00, ping is not supported and remember to change
            // HttpResponseDecoder to WebSocketHttpResponseDecoder in the pipeline.
            final WebSocketClientHandler handler =

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                    expectedChallengeResponseString));
        }


        // Format request
        FullHttpRequest request = new DefaultFullHttpRequest(HttpVersion.HTTP_1_1, HttpMethod.GET, path);
        HttpHeaders headers = request.headers();


        headers.add(Names.UPGRADE, Values.WEBSOCKET.toLowerCase())
               .add(Names.CONNECTION, Values.UPGRADE)
               .add(Names.SEC_WEBSOCKET_KEY, key)
               .add(Names.HOST, wsURL.getHost());


        int wsPort = wsURL.getPort();
        String originValue = "http://" + wsURL.getHost();
        if (wsPort != 80 && wsPort != 443) {
            // if the port is not standard (80/443) its needed to add the port to the header.
            // See http://tools.ietf.org/html/rfc6454#section-6.2
            originValue = originValue + ':' + wsPort;
        }
        headers.add(Names.SEC_WEBSOCKET_ORIGIN, originValue);


        String expectedSubprotocol = expectedSubprotocol();
        if (expectedSubprotocol != null && !expectedSubprotocol.isEmpty()) {
            headers.add(Names.SEC_WEBSOCKET_PROTOCOL, expectedSubprotocol);
        }


        headers.add(Names.SEC_WEBSOCKET_VERSION, "7");


        if (customHeaders != null) {
            headers.add(customHeaders);
        }
        return request;
    }

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     * @throws WebSocketHandshakeException
     */
    @Override
    protected void verify(FullHttpResponse response) {
        final HttpResponseStatus status = HttpResponseStatus.SWITCHING_PROTOCOLS;
        final HttpHeaders headers = response.headers();


        if (!response.getStatus().equals(status)) {
            throw new WebSocketHandshakeException("Invalid handshake response getStatus: " + response.getStatus());
        }


        String upgrade = headers.get(Names.UPGRADE);
        if (!Values.WEBSOCKET.equalsIgnoreCase(upgrade)) {
            throw new WebSocketHandshakeException("Invalid handshake response upgrade: " + upgrade);
        }


        String connection = headers.get(Names.CONNECTION);
        if (!Values.UPGRADE.equalsIgnoreCase(connection)) {
            throw new WebSocketHandshakeException("Invalid handshake response connection: " + connection);
        }


        String accept = headers.get(Names.SEC_WEBSOCKET_ACCEPT);
        if (accept == null || !accept.equals(expectedChallengeResponseString)) {
            throw new WebSocketHandshakeException(String.format(
                    "Invalid challenge. Actual: %s. Expected: %s", accept, expectedChallengeResponseString));
        }
    }

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                    expectedChallengeResponseString));
        }


        // Format request
        FullHttpRequest request = new DefaultFullHttpRequest(HttpVersion.HTTP_1_1, HttpMethod.GET, path);
        HttpHeaders headers = request.headers();


        headers.add(Names.UPGRADE, Values.WEBSOCKET.toLowerCase())
               .add(Names.CONNECTION, Values.UPGRADE)
               .add(Names.SEC_WEBSOCKET_KEY, key)
               .add(Names.HOST, wsURL.getHost());


        int wsPort = wsURL.getPort();
        String originValue = "http://" + wsURL.getHost();
        if (wsPort != 80 && wsPort != 443) {
            // if the port is not standard (80/443) its needed to add the port to the header.
            // See http://tools.ietf.org/html/rfc6454#section-6.2
            originValue = originValue + ':' + wsPort;
        }
        headers.add(Names.SEC_WEBSOCKET_ORIGIN, originValue);


        String expectedSubprotocol = expectedSubprotocol();
        if (expectedSubprotocol != null && !expectedSubprotocol.isEmpty()) {
            headers.add(Names.SEC_WEBSOCKET_PROTOCOL, expectedSubprotocol);
        }


        headers.add(Names.SEC_WEBSOCKET_VERSION, "8");


        if (customHeaders != null) {
            headers.add(customHeaders);
        }
        return request;
    }

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     * @throws WebSocketHandshakeException
     */
    @Override
    protected void verify(FullHttpResponse response) {
        final HttpResponseStatus status = HttpResponseStatus.SWITCHING_PROTOCOLS;
        final HttpHeaders headers = response.headers();


        if (!response.getStatus().equals(status)) {
            throw new WebSocketHandshakeException("Invalid handshake response getStatus: " + response.getStatus());
        }


        String upgrade = headers.get(Names.UPGRADE);
        if (!Values.WEBSOCKET.equalsIgnoreCase(upgrade)) {
            throw new WebSocketHandshakeException("Invalid handshake response upgrade: " + upgrade);
        }


        String connection = headers.get(Names.CONNECTION);
        if (!Values.UPGRADE.equalsIgnoreCase(connection)) {
            throw new WebSocketHandshakeException("Invalid handshake response connection: " + connection);
        }


        String accept = headers.get(Names.SEC_WEBSOCKET_ACCEPT);
        if (accept == null || !accept.equals(expectedChallengeResponseString)) {
            throw new WebSocketHandshakeException(String.format(
                    "Invalid challenge. Actual: %s. Expected: %s", accept, expectedChallengeResponseString));
        }
    }

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            return null;
        }


        FullHttpRequest request =
                new DefaultFullHttpRequest(HttpVersion.HTTP_1_1, HttpMethod.GET, uriGet.toASCIIString());
        HttpHeaders headers = request.headers();
        headers.set(HttpHeaders.Names.HOST, host);
        headers.set(HttpHeaders.Names.CONNECTION, HttpHeaders.Values.CLOSE);
        headers.set(HttpHeaders.Names.ACCEPT_ENCODING, HttpHeaders.Values.GZIP + ','
                + HttpHeaders.Values.DEFLATE);


        headers.set(HttpHeaders.Names.ACCEPT_CHARSET, "ISO-8859-1,utf-8;q=0.7,*;q=0.7");
        headers.set(HttpHeaders.Names.ACCEPT_LANGUAGE, "fr");
        headers.set(HttpHeaders.Names.REFERER, uriSimple.toString());
        headers.set(HttpHeaders.Names.USER_AGENT, "Netty Simple Http Client side");
        headers.set(HttpHeaders.Names.ACCEPT, "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");


        headers.set(HttpHeaders.Names.COOKIE, ClientCookieEncoder.encode(new DefaultCookie("my-cookie", "foo"),
                new DefaultCookie("another-cookie", "bar")));


        // send request
        List<Entry<String, String>> entries = headers.entries();
        channel.write(request).sync();


        // Wait for the server to close the connection.
        channel.closeFuture().sync();

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      public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception
      {
         if (msg instanceof DefaultFullHttpRequest)
         {
            DefaultFullHttpRequest request = (DefaultFullHttpRequest) msg;
            HttpHeaders headers = request.headers();
            String upgrade = headers.get("upgrade");
            if (upgrade != null && upgrade.equalsIgnoreCase("websocket"))
            {
               ctx.pipeline().addLast("websocket-handler", new WebSocketServerHandler());
               ctx.pipeline().addLast(new ProtocolDecoder(false, false));
               ctx.pipeline().remove(this);

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            headerFinalized = true;
        } else {
            throw new ErrorDataEncoderException("Header already encoded");
        }


        HttpHeaders headers = request.headers();
        List<String> contentTypes = headers.getAll(HttpHeaders.Names.CONTENT_TYPE);
        List<String> transferEncoding = headers.getAll(HttpHeaders.Names.TRANSFER_ENCODING);
        if (contentTypes != null) {
            headers.remove(HttpHeaders.Names.CONTENT_TYPE);
            for (String contentType : contentTypes) {
                // "multipart/form-data; boundary=--89421926422648"
                String lowercased = contentType.toLowerCase();
                if (lowercased.startsWith(HttpHeaders.Values.MULTIPART_FORM_DATA) ||
                    lowercased.startsWith(HttpHeaders.Values.APPLICATION_X_WWW_FORM_URLENCODED)) {
                    // ignore
                } else {
                    headers.add(HttpHeaders.Names.CONTENT_TYPE, contentType);
                }
            }
        }
        if (isMultipart) {
            String value = HttpHeaders.Values.MULTIPART_FORM_DATA + "; " + HttpHeaders.Values.BOUNDARY + '='
                    + multipartDataBoundary;
            headers.add(HttpHeaders.Names.CONTENT_TYPE, value);
        } else {
            // Not multipart
            headers.add(HttpHeaders.Names.CONTENT_TYPE, HttpHeaders.Values.APPLICATION_X_WWW_FORM_URLENCODED);
        }
        // Now consider size for chunk or not
        long realSize = globalBodySize;
        if (isMultipart) {
            iterator = multipartHttpDatas.listIterator();
        } else {
            realSize -= 1; // last '&' removed
            iterator = multipartHttpDatas.listIterator();
        }
        headers.set(HttpHeaders.Names.CONTENT_LENGTH, String.valueOf(realSize));
        if (realSize > HttpPostBodyUtil.chunkSize || isMultipart) {
            isChunked = true;
            if (transferEncoding != null) {
                headers.remove(HttpHeaders.Names.TRANSFER_ENCODING);
                for (String v : transferEncoding) {
                    if (v.equalsIgnoreCase(HttpHeaders.Values.CHUNKED)) {
                        // ignore
                    } else {
                        headers.add(HttpHeaders.Names.TRANSFER_ENCODING, v);
                    }
                }
            }
            HttpHeaders.setTransferEncodingChunked(request);

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