Java HttpServerExchange.isPersistent方法代码示例

import io.undertow.server.HttpServerExchange; //导入方法依赖的package包/类
private static StreamSinkConduit handleExplicitTransferEncoding(HttpServerExchange exchange, StreamSinkConduit channel, ConduitListener<StreamSinkConduit> finishListener, HeaderMap responseHeaders, String transferEncodingHeader, boolean headRequest) {
    HttpString transferEncoding = new HttpString(transferEncodingHeader);
    if (transferEncoding.equals(Headers.CHUNKED)) {
        if (headRequest) {
            return channel;
        }
        Boolean preChunked = exchange.getAttachment(HttpAttachments.PRE_CHUNKED_RESPONSE);
        if(preChunked != null && preChunked) {
            return new PreChunkedStreamSinkConduit(channel, finishListener, exchange);
        } else {
            return new ChunkedStreamSinkConduit(channel, exchange.getConnection().getBufferPool(), true, !exchange.isPersistent(), responseHeaders, finishListener, exchange);
        }
    } else {

        if (headRequest) {
            return channel;
        }
        log.trace("Cancelling persistence because response is identity with no content length");
        // make it not persistent - very unfortunate for the next request handler really...
        exchange.setPersistent(false);
        responseHeaders.put(Headers.CONNECTION, Headers.CLOSE.toString());
        return new FinishableStreamSinkConduit(channel, terminateResponseListener(exchange));
    }
}
 

import io.undertow.server.HttpServerExchange; //导入方法依赖的package包/类
public void exchangeComplete(final HttpServerExchange exchange) {
    if (!exchange.isUpgrade() && exchange.isPersistent()) {
        startRequest();
        ConduitStreamSourceChannel channel = ((AjpServerConnection) exchange.getConnection()).getChannel().getSourceChannel();
        channel.getReadSetter().set(this);
        channel.wakeupReads();
    } else if(!exchange.isPersistent()) {
        safeClose(exchange.getConnection());
    }
}
 

import io.undertow.server.HttpServerExchange; //导入方法依赖的package包/类
private static StreamSinkConduit handleResponseConduit(HttpServerExchange exchange, boolean headRequest, StreamSinkConduit channel, HeaderMap responseHeaders, ConduitListener<StreamSinkConduit> finishListener, String transferEncodingHeader) {

        if (transferEncodingHeader == null) {
            if (exchange.isHttp11()) {
                if (exchange.isPersistent()) {
                    responseHeaders.put(Headers.TRANSFER_ENCODING, Headers.CHUNKED.toString());

                    if (headRequest) {
                        return channel;
                    }
                    return new ChunkedStreamSinkConduit(channel, exchange.getConnection().getBufferPool(), true, !exchange.isPersistent(), responseHeaders, finishListener, exchange);
                } else {
                    if (headRequest) {
                        return channel;
                    }
                    return new FinishableStreamSinkConduit(channel, finishListener);
                }
            } else {
                exchange.setPersistent(false);
                responseHeaders.put(Headers.CONNECTION, Headers.CLOSE.toString());
                if (headRequest) {
                    return channel;
                }
                return new FinishableStreamSinkConduit(channel, finishListener);
            }
        } else {
            //moved outside because this is rarely used
            //and makes the method small enough to be inlined
            return handleExplicitTransferEncoding(exchange, channel, finishListener, responseHeaders, transferEncodingHeader, headRequest);
        }
    }
 

import io.undertow.server.HttpServerExchange; //导入方法依赖的package包/类
static StreamSinkConduit createSinkConduit(final HttpServerExchange exchange) {
    DateUtils.addDateHeaderIfRequired(exchange);

    boolean headRequest = exchange.getRequestMethod().equals(Methods.HEAD);
    HttpServerConnection serverConnection = (HttpServerConnection) exchange.getConnection();

    HttpResponseConduit responseConduit = serverConnection.getResponseConduit();
    responseConduit.reset(exchange);
    StreamSinkConduit channel = responseConduit;
    if (headRequest) {
        //if this is a head request we add a head channel underneath the content encoding channel
        //this will just discard the data
        //we still go through with the rest of the logic, to make sure all headers are set correctly
        channel = new HeadStreamSinkConduit(channel, terminateResponseListener(exchange));
    } else if(!Connectors.isEntityBodyAllowed(exchange)) {
        //we are not allowed to send an entity body for some requests
        exchange.getResponseHeaders().remove(Headers.CONTENT_LENGTH);
        exchange.getResponseHeaders().remove(Headers.TRANSFER_ENCODING);
        channel = new HeadStreamSinkConduit(channel, terminateResponseListener(exchange));
    }

    final HeaderMap responseHeaders = exchange.getResponseHeaders();
    // test to see if we're still persistent
    String connection = responseHeaders.getFirst(Headers.CONNECTION);
    if (!exchange.isPersistent()) {
        responseHeaders.put(Headers.CONNECTION, Headers.CLOSE.toString());
    } else if (exchange.isPersistent() && connection != null) {
        if (HttpString.tryFromString(connection).equals(Headers.CLOSE)) {
            exchange.setPersistent(false);
        }
    } else if (exchange.getConnection().getUndertowOptions().get(UndertowOptions.ALWAYS_SET_KEEP_ALIVE, true)) {
        responseHeaders.put(Headers.CONNECTION, Headers.KEEP_ALIVE.toString());
    }
    //according to the HTTP RFC we should ignore content length if a transfer coding is specified
    final String transferEncodingHeader = responseHeaders.getLast(Headers.TRANSFER_ENCODING);
    if(transferEncodingHeader == null) {
        final String contentLengthHeader = responseHeaders.getFirst(Headers.CONTENT_LENGTH);
        if (contentLengthHeader != null) {
            StreamSinkConduit res = handleFixedLength(exchange, headRequest, channel, responseHeaders, contentLengthHeader, serverConnection);
            if (res != null) {
                return res;
            }
        }
    }
    return handleResponseConduit(exchange, headRequest, channel, responseHeaders, terminateResponseListener(exchange), transferEncodingHeader);
}
 

import io.undertow.server.HttpServerExchange; //导入方法依赖的package包/类
void reset(long contentLength, HttpServerExchange exchange) {
    this.exchange = exchange;
    super.reset(contentLength, !exchange.isPersistent());
}