io.undertow.server.protocol.http2.Http2UpgradeHandler Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
/*
* JBoss, Home of Professional Open Source.
* Copyright 2014 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.undertow.server.protocol.http2;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
import org.xnio.OptionMap;
import org.xnio.StreamConnection;
import io.undertow.UndertowLogger;
import io.undertow.UndertowOptions;
import io.undertow.io.IoCallback;
import io.undertow.io.Receiver;
import io.undertow.io.Sender;
import io.undertow.protocols.http2.Http2Channel;
import io.undertow.server.Connectors;
import io.undertow.server.HttpHandler;
import io.undertow.server.HttpServerExchange;
import io.undertow.server.HttpUpgradeListener;
import io.undertow.server.protocol.http.HttpContinue;
import io.undertow.util.FlexBase64;
import io.undertow.util.Headers;
import io.undertow.util.ImmediatePooledByteBuffer;
import io.undertow.util.Protocols;
import io.undertow.util.StatusCodes;
/**
* Upgrade listener for HTTP2, this allows connections to be established using the upgrade
* mechanism as detailed in Section 3.2. This should always be the first handler in a handler
* chain.
*
*
* @author Stuart Douglas
*/
public class Http2UpgradeHandler implements HttpHandler {
private final HttpHandler next;
private final Set upgradeStrings;
public Http2UpgradeHandler(HttpHandler next) {
this.next = next;
this.upgradeStrings = Collections.singleton(Http2Channel.CLEARTEXT_UPGRADE_STRING);
}
public Http2UpgradeHandler(HttpHandler next, String... upgradeStrings) {
this.next = next;
this.upgradeStrings = new HashSet<>(Arrays.asList(upgradeStrings));
}
@Override
public void handleRequest(HttpServerExchange exchange) throws Exception {
final String upgrade = exchange.getRequestHeaders().getFirst(Headers.UPGRADE);
final String settings = exchange.getRequestHeaders().getFirst("HTTP2-Settings");
if(settings != null && upgrade != null && upgradeStrings.contains(upgrade)) {
if(HttpContinue.requiresContinueResponse(exchange)) {
HttpContinue.sendContinueResponse(exchange, new IoCallback() {
@Override
public void onComplete(HttpServerExchange exchange, Sender sender) {
try {
handleUpgradeBody(exchange, upgrade, settings);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
@Override
public void onException(HttpServerExchange exchange, Sender sender, IOException exception) {
exchange.setStatusCode(StatusCodes.INTERNAL_SERVER_ERROR);
exchange.endExchange();
}
});
} else {
handleUpgradeBody(exchange, upgrade, settings);
}
return;
}
next.handleRequest(exchange);
}
private void handleUpgradeBody(HttpServerExchange exchange, String upgrade, String settings) throws Exception {
if(exchange.isRequestComplete()) {
handleHttp2Upgrade(exchange, upgrade, settings, null);
} else {
final int maxBufferedSize = exchange.getConnection().getUndertowOptions().get(UndertowOptions.MAX_BUFFERED_REQUEST_SIZE, UndertowOptions.DEFAULT_MAX_BUFFERED_REQUEST_SIZE);
if(exchange.getRequestContentLength() > maxBufferedSize) {
//request is too big to buffer
//we don't upgrade to HTTP/2
next.handleRequest(exchange);
} else if(exchange.getRequestContentLength() > 0 && exchange.getRequestContentLength() < maxBufferedSize) {
//we know it is fine to buffer
exchange.getRequestReceiver().receiveFullBytes(new Receiver.FullBytesCallback() {
@Override
public void handle(HttpServerExchange exchange, byte[] message) {
try {
handleHttp2Upgrade(exchange, upgrade, settings, message);
} catch (IOException e) {
UndertowLogger.REQUEST_IO_LOGGER.ioException(e);
exchange.endExchange();
}
}
});
} else {
final ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
exchange.getRequestReceiver().receivePartialBytes(new Receiver.PartialBytesCallback() {
@Override
public void handle(HttpServerExchange exchange, byte[] message, boolean last) {
try {
outputStream.write(message);
if(last) {
handleHttp2Upgrade(exchange, upgrade, settings, outputStream.toByteArray());
} else if(outputStream.size() >= maxBufferedSize) {
exchange.getRequestReceiver().pause();
Connectors.ungetRequestBytes(exchange, new ImmediatePooledByteBuffer(ByteBuffer.wrap(outputStream.toByteArray())));
Connectors.resetRequestChannel(exchange);
next.handleRequest(exchange);
}
} catch (IOException e) {
UndertowLogger.REQUEST_IO_LOGGER.ioException(e);
exchange.endExchange();
} catch (RuntimeException e) {
throw e;
} catch (Exception e) {
throw new RuntimeException(e);
}
}
});
}
}
}
private void handleHttp2Upgrade(HttpServerExchange exchange, final String upgrade, String settings, final byte[] data) throws IOException {
//required by spec
final ByteBuffer settingsFrame = FlexBase64.decodeURL(settings);
exchange.getResponseHeaders().put(Headers.UPGRADE, upgrade);
exchange.upgradeChannel(new HttpUpgradeListener() {
@Override
public void handleUpgrade(StreamConnection streamConnection, HttpServerExchange exchange) {
OptionMap undertowOptions = exchange.getConnection().getUndertowOptions();
Http2Channel channel = new Http2Channel(streamConnection, upgrade, exchange.getConnection().getByteBufferPool(), null, false, true, true, settingsFrame, undertowOptions);
Http2ReceiveListener receiveListener = new Http2ReceiveListener(new HttpHandler() {
@Override
public void handleRequest(HttpServerExchange exchange) throws Exception {
//if this header is present we don't actually process the rest of the handler chain
//as the request was only to create the initial request
if(exchange.getRequestHeaders().contains("X-HTTP2-connect-only")) {
exchange.endExchange();
return;
}
exchange.setProtocol(Protocols.HTTP_2_0);
next.handleRequest(exchange);
}
}, undertowOptions, exchange.getConnection().getBufferSize(), null);
channel.getReceiveSetter().set(receiveListener);
// don't decode requests from upgrade, they are already decoded by the parser for protocol HTTP 1.1 (HttpRequestParser)
// however, the queries have to be decoded, since this is decoded only once, when the connector parses the query string
// to fill in the query param collection of the HttpServerExchange (see Connectors invoking URLUtils.QUERY_STRING_PARSER)
final boolean decodeURL = undertowOptions.get(UndertowOptions.DECODE_URL, true);
final boolean allowUnescapedCharactersInURL = undertowOptions.get(UndertowOptions.ALLOW_UNESCAPED_CHARACTERS_IN_URL, false);
// if allowUnescapedCharactersInURL is true, the decoding has already been done
receiveListener.handleInitialRequest(exchange, channel, data, decodeURL && !allowUnescapedCharactersInURL, decodeURL);
channel.resumeReceives();
}
});
}
}