Java HttpHeaders.isKeepAlive方法代碼示例

import io.netty.handler.codec.http.HttpHeaders; //導入方法依賴的package包/類
/**
 * 返回http信息
 * @param ctx
 * @param req
 * @param res
 */
private static void sendHttpResponse(
        ChannelHandlerContext ctx, FullHttpRequest req, FullHttpResponse res) {
    // Generate an error page if response getStatus code is not OK (200).
    if (res.getStatus().code() != 200) {
        ByteBuf buf = Unpooled.copiedBuffer(res.getStatus().toString(), CharsetUtil.UTF_8);
        res.content().writeBytes(buf);
        buf.release();
        HttpHeaders.setContentLength(res, res.content().readableBytes());
    }

    // Send the response and close the connection if necessary.
    ChannelFuture f = ctx.channel().writeAndFlush(res);
    if (!HttpHeaders.isKeepAlive(req) || res.getStatus().code() != 200) {
        f.addListener(ChannelFutureListener.CLOSE);
    }
}
 

import io.netty.handler.codec.http.HttpHeaders; //導入方法依賴的package包/類
private boolean writeResponse(HttpObject currentObj, ChannelHandlerContext ctx) {
    // Decide whether to close the connection or not.
    boolean keepAlive = HttpHeaders.isKeepAlive(request);

    // Build the response object.
    FullHttpResponse response = new DefaultFullHttpResponse(
        HTTP_1_1, currentObj.getDecoderResult().isSuccess() ? OK : BAD_REQUEST,
        Unpooled.copiedBuffer(buf.toString(), CharsetUtil.UTF_8));

    response.headers().set(CONTENT_TYPE, "application/json");

    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);
    }

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

    return keepAlive;
}
 

import io.netty.handler.codec.http.HttpHeaders; //導入方法依賴的package包/類
public void sendHttpResponse(ChannelHandlerContext ctx, FullHttpRequest req, FullHttpResponse res) {
   if (res.getStatus().code() != 200) {
      ByteBuf f = Unpooled.copiedBuffer(res.getStatus().toString(), CharsetUtil.UTF_8);
      res.content().clear();
      res.content().writeBytes(f);
      f.release();
   }

   HttpHeaders.setContentLength(res, res.content().readableBytes());
   ChannelFuture f1;
   f1 = ctx.channel().writeAndFlush(res);

   if (!HttpHeaders.isKeepAlive(req) || res.getStatus().code() != 200) {
      f1.addListener(ChannelFutureListener.CLOSE);
   }
}
 

import io.netty.handler.codec.http.HttpHeaders; //導入方法依賴的package包/類
@Override
protected void channelRead0(ChannelHandlerContext ctx, FullHttpRequest msg) throws Exception {

    ByteBuf buf = msg.content();
    byte[] bytes = new byte[buf.readableBytes()];
    buf.getBytes(0, bytes);

    YarRequest yarRequest = YarProtocol.buildRequest(bytes);
    YarResponse yarResponse = process(yarRequest);

    FullHttpResponse response =
            new DefaultFullHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.OK, Unpooled.wrappedBuffer(YarProtocol
                    .toProtocolBytes(yarResponse)));
    response.headers().set(HttpHeaders.Names.CONTENT_TYPE, "application/x-www-form-urlencoded");
    response.headers().set(HttpHeaders.Names.CONTENT_LENGTH, response.content().readableBytes());
    if (HttpHeaders.isKeepAlive(msg)) {
        response.headers().set(HttpHeaders.Names.CONNECTION, Values.KEEP_ALIVE);
    }
    ctx.write(response);
    ctx.flush();
    ctx.close();
}
 

import io.netty.handler.codec.http.HttpHeaders; //導入方法依賴的package包/類
@Override
public void channelRead(ChannelHandlerContext ctx, Object msg)
        throws Exception {
    if (msg instanceof HttpRequest) {
        request = (HttpRequest) msg;

        String uri = request.getUri();
        System.out.println("Uri:" + uri);
    }
    if (msg instanceof HttpContent) {
        HttpContent content = (HttpContent) msg;
        ByteBuf buf = content.content();
        System.out.println(buf.toString(io.netty.util.CharsetUtil.UTF_8));
        buf.release();

        String res = "I am OK";
        FullHttpResponse response = new DefaultFullHttpResponse(HTTP_1_1,
                OK, Unpooled.wrappedBuffer(res.getBytes("UTF-8")));
        response.headers().set(CONTENT_TYPE, "text/plain");
        response.headers().set(CONTENT_LENGTH,
                response.content().readableBytes());
        if (HttpHeaders.isKeepAlive(request)) {
            response.headers().set(CONNECTION, Values.KEEP_ALIVE);
        }
        ctx.write(response);
        ctx.flush();
    }
}
 

import io.netty.handler.codec.http.HttpHeaders; //導入方法依賴的package包/類
public RequestInfoImpl(HttpRequest request) {
    this(request.getUri(), request.getMethod(), request.headers(),
         HttpUtils.extractTrailingHeadersIfPossible(request), null, HttpUtils.extractCookies(request), null,
         HttpUtils.extractContentChunks(request), request.getProtocolVersion(), HttpHeaders.isKeepAlive(request),
         (request instanceof FullHttpRequest),
         HttpPostRequestDecoder.isMultipart(request));
}
 

import io.netty.handler.codec.http.HttpHeaders; //導入方法依賴的package包/類
/**
 * Implemented in accordance with RFC 7230 section 6.1 https://tools.ietf.org/html/rfc7230#section-6.1
 */
@Override
public boolean keepAlive(Request ahcRequest, HttpRequest request, HttpResponse response) {
    return HttpHeaders.isKeepAlive(response)//
            && HttpHeaders.isKeepAlive(request)
            // support non standard Proxy-Connection
            && !response.headers().contains("Proxy-Connection", HttpHeaders.Values.CLOSE, true);
}
 

import io.netty.handler.codec.http.HttpHeaders; //導入方法依賴的package包/類
/**
 * Determine whether or not the client connection should be closed.
 * 
 * @param req
 * @param res
 * @param httpObject
 * @return
 */
private boolean shouldCloseClientConnection(HttpRequest req,
        HttpResponse res, HttpObject httpObject) {
    if (ProxyUtils.isChunked(res)) {
        // If the response is chunked, we want to return false unless it's
        // the last chunk. If it is the last chunk, then we want to pass
        // through to the same close semantics we'd otherwise use.
        if (httpObject != null) {
            if (!ProxyUtils.isLastChunk(httpObject)) {
                String uri = null;
                if (req != null) {
                    uri = req.getUri();
                }
                LOG.debug("Not closing client connection on middle chunk for {}", uri);
                return false;
            } else {
                LOG.debug("Handling last chunk. Using normal client connection closing rules.");
            }
        }
    }

    if (!HttpHeaders.isKeepAlive(req)) {
        LOG.debug("Closing client connection since request is not keep alive: {}", req);
        // Here we simply want to close the connection because the
        // client itself has requested it be closed in the request.
        return true;
    }

    // ignore the response's keep-alive; we can keep this client connection open as long as the client allows it.

    LOG.debug("Not closing client connection for request: {}", req);
    return false;
}
 

import io.netty.handler.codec.http.HttpHeaders; //導入方法依賴的package包/類
/**
 * Determines if the remote connection should be closed based on the request
 * and response pair. If the request is HTTP 1.0 with no keep-alive header,
 * for example, the connection should be closed.
 * 
 * This in part determines if we should close the connection. Here's the
 * relevant section of RFC 2616:
 * 
 * "HTTP/1.1 defines the "close" connection option for the sender to signal
 * that the connection will be closed after completion of the response. For
 * example,
 * 
 * Connection: close
 * 
 * in either the request or the response header fields indicates that the
 * connection SHOULD NOT be considered `persistent' (section 8.1) after the
 * current request/response is complete."
 * 
 * @param req
 *            The request.
 * @param res
 *            The response.
 * @param msg
 *            The message.
 * @return Returns true if the connection should close.
 */
private boolean shouldCloseServerConnection(HttpRequest req,
        HttpResponse res, HttpObject msg) {
    if (ProxyUtils.isChunked(res)) {
        // If the response is chunked, we want to return false unless it's
        // the last chunk. If it is the last chunk, then we want to pass
        // through to the same close semantics we'd otherwise use.
        if (msg != null) {
            if (!ProxyUtils.isLastChunk(msg)) {
                String uri = null;
                if (req != null) {
                    uri = req.getUri();
                }
                LOG.debug("Not closing server connection on middle chunk for {}", uri);
                return false;
            } else {
                LOG.debug("Handling last chunk. Using normal server connection closing rules.");
            }
        }
    }

    // ignore the request's keep-alive; we can keep this server connection open as long as the server allows it.

    if (!HttpHeaders.isKeepAlive(res)) {
        LOG.debug("Closing server connection since response is not keep alive: {}", res);
        // In this case, we want to honor the Connection: close header
        // from the remote server and close that connection. We don't
        // necessarily want to close the connection to the client, however
        // as it's possible it has other connections open.
        return true;
    }

    LOG.debug("Not closing server connection for response: {}", res);
    return false;
}
 

import io.netty.handler.codec.http.HttpHeaders; //導入方法依賴的package包/類
/**
 * Responds to the client with the specified "short-circuit" response. The response will be sent through the
 * {@link HttpFilters#proxyToClientResponse(HttpObject)} filter method before writing it to the client. The client
 * will not be disconnected, unless the response includes a "Connection: close" header, or the filter returns
 * a null HttpResponse (in which case no response will be written to the client and the connection will be
 * disconnected immediately). If the response is not a Bad Gateway or Gateway Timeout response, the response's headers
 * will be modified to reflect proxying, including adding a Via header, Date header, etc.
 *
 * @param httpResponse the response to return to the client
 * @return true if the connection will be kept open, or false if it will be disconnected.
 */
private boolean respondWithShortCircuitResponse(HttpResponse httpResponse) {
    // we are sending a response to the client, so we are done handling this request
    this.currentRequest = null;

    HttpResponse filteredResponse = (HttpResponse) currentFilters.proxyToClientResponse(httpResponse);
    if (filteredResponse == null) {
        disconnect();
        return false;
    }

    // allow short-circuit messages to close the connection. normally the Connection header would be stripped when modifying
    // the message for proxying, so save the keep-alive status before the modifications are made.
    boolean isKeepAlive = HttpHeaders.isKeepAlive(httpResponse);

    // if the response is not a Bad Gateway or Gateway Timeout, modify the headers "as if" the short-circuit response were proxied
    int statusCode = httpResponse.getStatus().code();
    if (statusCode != HttpResponseStatus.BAD_GATEWAY.code() && statusCode != HttpResponseStatus.GATEWAY_TIMEOUT.code()) {
        modifyResponseHeadersToReflectProxying(httpResponse);
    }

    // restore the keep alive status, if it was overwritten when modifying headers for proxying
    HttpHeaders.setKeepAlive(httpResponse, isKeepAlive);

    write(httpResponse);

    if (ProxyUtils.isLastChunk(httpResponse)) {
        writeEmptyBuffer();
    }

    if (!HttpHeaders.isKeepAlive(httpResponse)) {
        disconnect();
        return false;
    }

    return true;
}
 

import io.netty.handler.codec.http.HttpHeaders; //導入方法依賴的package包/類
/**
 * Provide the response as per the requests
 * @param ChannelHandlerContext, FullHttpRequest, FullHttpResponse
 * @return void
 */
private static void sendHttpResponse(ChannelHandlerContext ctx, HttpRequest req, FullHttpResponse res) throws Exception {
	if (res.getStatus().code() != 200) {
		ByteBuf buf = Unpooled.copiedBuffer(res.getStatus().toString(), CharsetUtil.UTF_8);
		res.content().writeBytes(buf);
		buf.release();
		HttpHeaders.setContentLength(res, res.content().readableBytes());
	}

	ChannelFuture f = ctx.channel().writeAndFlush(res);
	if (!HttpHeaders.isKeepAlive(req) || res.getStatus().code() != 200) {
		f.addListener(ChannelFutureListener.CLOSE);
	}
}
 

import io.netty.handler.codec.http.HttpHeaders; //導入方法依賴的package包/類
private void sendHttpResponse(ChannelHandlerContext ctx, FullHttpRequest req, FullHttpResponse res) {
	// Generate an error page if response getStatus code is not OK (200).
	if (res.getStatus().code() != 200) {
		ByteBuf buf = Unpooled.copiedBuffer(res.getStatus().toString(), CharsetUtil.UTF_8);
		res.content().writeBytes(buf);
		buf.release();
		HttpHeaders.setContentLength(res, res.content().readableBytes());
	}

	// Send the response and close the connection if necessary.
	ChannelFuture f = ctx.channel().writeAndFlush(res);
	if (!HttpHeaders.isKeepAlive(req) || res.getStatus().code() != 200) {
		f.addListener(ChannelFutureListener.CLOSE);
	}
}
 

import io.netty.handler.codec.http.HttpHeaders; //導入方法依賴的package包/類
@Override
protected void beforeProcess(Exchange exchange, final ChannelHandlerContext ctx, final Object message) {
    if (consumer.getConfiguration().isBridgeEndpoint()) {
        exchange.setProperty(Exchange.SKIP_GZIP_ENCODING, Boolean.TRUE);
        exchange.setProperty(Exchange.SKIP_WWW_FORM_URLENCODED, Boolean.TRUE);
    }
    HttpRequest request = (HttpRequest) message;
    // setup the connection property in case of the message header is removed
    boolean keepAlive = HttpHeaders.isKeepAlive(request);
    if (!keepAlive) {
        // Just make sure we close the connection this time.
        exchange.setProperty(HttpHeaders.Names.CONNECTION, HttpHeaders.Values.CLOSE);
    }
}
 

import io.netty.handler.codec.http.HttpHeaders; //導入方法依賴的package包/類
@Override
protected Message getResponseMessage(Exchange exchange, ChannelHandlerContext ctx, Object message) throws Exception {
    FullHttpResponse response = (FullHttpResponse) message;
    if (!HttpHeaders.isKeepAlive(response)) {
        // just want to make sure we close the channel if the keepAlive is not true
        exchange.setProperty(NettyConstants.NETTY_CLOSE_CHANNEL_WHEN_COMPLETE, true);
    }
    // use the binding
    return producer.getEndpoint().getNettyHttpBinding().toCamelMessage(response, exchange, producer.getConfiguration());
}