/
RoutingInBoundHandler.java
1400 lines (1263 loc) · 64.4 KB
/
RoutingInBoundHandler.java
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/*
* Copyright 2017-2020 original authors
*
* 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
*
* https://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.micronaut.http.server.netty;
import io.micronaut.buffer.netty.NettyByteBufferFactory;
import io.micronaut.context.event.ApplicationEventPublisher;
import io.micronaut.core.annotation.Internal;
import io.micronaut.core.annotation.NonNull;
import io.micronaut.core.annotation.Nullable;
import io.micronaut.core.async.publisher.Publishers;
import io.micronaut.core.async.subscriber.CompletionAwareSubscriber;
import io.micronaut.core.convert.ConversionService;
import io.micronaut.core.io.Writable;
import io.micronaut.core.io.buffer.ByteBuffer;
import io.micronaut.core.reflect.ClassUtils;
import io.micronaut.core.type.Argument;
import io.micronaut.core.util.CollectionUtils;
import io.micronaut.http.HttpAttributes;
import io.micronaut.http.HttpHeaders;
import io.micronaut.http.HttpMethod;
import io.micronaut.http.HttpRequest;
import io.micronaut.http.HttpResponse;
import io.micronaut.http.HttpStatus;
import io.micronaut.http.MediaType;
import io.micronaut.http.MutableHttpHeaders;
import io.micronaut.http.MutableHttpResponse;
import io.micronaut.http.annotation.Body;
import io.micronaut.http.codec.MediaTypeCodec;
import io.micronaut.http.codec.MediaTypeCodecRegistry;
import io.micronaut.http.context.ServerRequestContext;
import io.micronaut.http.context.event.HttpRequestTerminatedEvent;
import io.micronaut.http.multipart.PartData;
import io.micronaut.http.multipart.StreamingFileUpload;
import io.micronaut.http.netty.AbstractNettyHttpRequest;
import io.micronaut.http.netty.NettyHttpResponseBuilder;
import io.micronaut.http.netty.NettyMutableHttpResponse;
import io.micronaut.http.netty.stream.JsonSubscriber;
import io.micronaut.http.netty.stream.StreamedHttpRequest;
import io.micronaut.http.server.RouteExecutor;
import io.micronaut.http.server.binding.RequestArgumentSatisfier;
import io.micronaut.http.server.exceptions.InternalServerException;
import io.micronaut.http.server.exceptions.response.ErrorContext;
import io.micronaut.http.server.exceptions.response.ErrorResponseProcessor;
import io.micronaut.http.server.netty.configuration.NettyHttpServerConfiguration;
import io.micronaut.http.server.netty.multipart.NettyPartData;
import io.micronaut.http.server.netty.multipart.NettyStreamingFileUpload;
import io.micronaut.http.server.netty.types.NettyCustomizableResponseTypeHandler;
import io.micronaut.http.server.netty.types.NettyCustomizableResponseTypeHandlerRegistry;
import io.micronaut.http.server.netty.types.files.NettyStreamedFileCustomizableResponseType;
import io.micronaut.http.server.netty.types.files.NettySystemFileCustomizableResponseType;
import io.micronaut.http.server.types.files.FileCustomizableResponseType;
import io.micronaut.runtime.http.codec.TextPlainCodec;
import io.micronaut.web.router.MethodBasedRouteMatch;
import io.micronaut.web.router.RouteInfo;
import io.micronaut.web.router.RouteMatch;
import io.micronaut.web.router.Router;
import io.micronaut.web.router.UriRouteMatch;
import io.micronaut.web.router.exceptions.DuplicateRouteException;
import io.micronaut.web.router.resource.StaticResourceResolver;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufHolder;
import io.netty.buffer.ByteBufOutputStream;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandler.Sharable;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.handler.codec.DecoderResult;
import io.netty.handler.codec.TooLongFrameException;
import io.netty.handler.codec.http.DefaultFullHttpResponse;
import io.netty.handler.codec.http.DefaultHttpContent;
import io.netty.handler.codec.http.DefaultHttpHeaders;
import io.netty.handler.codec.http.HttpContent;
import io.netty.handler.codec.http.HttpHeaderNames;
import io.netty.handler.codec.http.HttpHeaderValues;
import io.netty.handler.codec.http.HttpResponseStatus;
import io.netty.handler.codec.http.HttpVersion;
import io.netty.handler.codec.http.LastHttpContent;
import io.netty.handler.codec.http.multipart.Attribute;
import io.netty.handler.codec.http.multipart.FileUpload;
import io.netty.handler.codec.http.multipart.HttpData;
import io.netty.handler.codec.http2.Http2Error;
import io.netty.handler.codec.http2.Http2Exception;
import io.netty.handler.timeout.IdleState;
import io.netty.handler.timeout.IdleStateEvent;
import io.netty.util.concurrent.Future;
import io.netty.util.concurrent.GenericFutureListener;
import org.reactivestreams.Publisher;
import org.reactivestreams.Subscriber;
import org.reactivestreams.Subscription;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;
import reactor.core.publisher.MonoSink;
import reactor.core.publisher.Sinks;
import javax.net.ssl.SSLException;
import java.io.File;
import java.io.IOException;
import java.net.URISyntaxException;
import java.net.URL;
import java.nio.channels.ClosedChannelException;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Optional;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicLong;
import java.util.concurrent.atomic.AtomicReference;
import java.util.function.BiConsumer;
import java.util.function.LongConsumer;
import java.util.function.Supplier;
import java.util.regex.Pattern;
import java.util.stream.Collectors;
/**
* Internal implementation of the {@link io.netty.channel.ChannelInboundHandler} for Micronaut.
*
* @author Graeme Rocher
* @since 1.0
*/
@Internal
@Sharable
@SuppressWarnings("FileLength")
class RoutingInBoundHandler extends SimpleChannelInboundHandler<io.micronaut.http.HttpRequest<?>> {
private static final Logger LOG = LoggerFactory.getLogger(RoutingInBoundHandler.class);
/**
* Also present in {@link RouteExecutor}
*/
private static final Pattern IGNORABLE_ERROR_MESSAGE = Pattern.compile(
"^.*(?:connection.*(?:reset|closed|abort|broken)|broken.*pipe).*$", Pattern.CASE_INSENSITIVE);
private static final Argument ARGUMENT_PART_DATA = Argument.of(PartData.class);
private final Router router;
private final StaticResourceResolver staticResourceResolver;
private final NettyHttpServerConfiguration serverConfiguration;
private final HttpContentProcessorResolver httpContentProcessorResolver;
private final ErrorResponseProcessor<?> errorResponseProcessor;
private final RequestArgumentSatisfier requestArgumentSatisfier;
private final MediaTypeCodecRegistry mediaTypeCodecRegistry;
private final NettyCustomizableResponseTypeHandlerRegistry customizableResponseTypeHandlerRegistry;
private final Supplier<ExecutorService> ioExecutorSupplier;
private final boolean multipartEnabled;
private ExecutorService ioExecutor;
private final ApplicationEventPublisher<HttpRequestTerminatedEvent> terminateEventPublisher;
private final RouteExecutor routeExecutor;
/**
* @param customizableResponseTypeHandlerRegistry The customizable response type handler registry
* @param serverConfiguration The Netty HTTP server configuration
* @param embeddedServerContext The embedded server context
* @param ioExecutor The IO executor
* @param httpContentProcessorResolver The http content processor resolver
* @param terminateEventPublisher The terminate event publisher
*/
RoutingInBoundHandler(
NettyHttpServerConfiguration serverConfiguration,
NettyCustomizableResponseTypeHandlerRegistry customizableResponseTypeHandlerRegistry,
NettyEmbeddedServices embeddedServerContext,
Supplier<ExecutorService> ioExecutor,
HttpContentProcessorResolver httpContentProcessorResolver,
ApplicationEventPublisher<HttpRequestTerminatedEvent> terminateEventPublisher) {
this.mediaTypeCodecRegistry = embeddedServerContext.getMediaTypeCodecRegistry();
this.customizableResponseTypeHandlerRegistry = customizableResponseTypeHandlerRegistry;
this.staticResourceResolver = embeddedServerContext.getStaticResourceResolver();
this.ioExecutorSupplier = ioExecutor;
this.router = embeddedServerContext.getRouter();
this.requestArgumentSatisfier = embeddedServerContext.getRequestArgumentSatisfier();
this.serverConfiguration = serverConfiguration;
this.httpContentProcessorResolver = httpContentProcessorResolver;
this.errorResponseProcessor = embeddedServerContext.getRouteExecutor().getErrorResponseProcessor();
this.terminateEventPublisher = terminateEventPublisher;
Optional<Boolean> multipartEnabled = serverConfiguration.getMultipart().getEnabled();
this.multipartEnabled = !multipartEnabled.isPresent() || multipartEnabled.get();
this.routeExecutor = embeddedServerContext.getRouteExecutor();
}
@Override
public void handlerRemoved(ChannelHandlerContext ctx) throws Exception {
super.handlerRemoved(ctx);
cleanupIfNecessary(ctx);
}
@Override
public void channelInactive(ChannelHandlerContext ctx) throws Exception {
super.channelInactive(ctx);
if (ctx.channel().isWritable()) {
ctx.flush();
}
cleanupIfNecessary(ctx);
}
private void cleanupIfNecessary(ChannelHandlerContext ctx) {
NettyHttpRequest.remove(ctx);
}
private void cleanupRequest(ChannelHandlerContext ctx, NettyHttpRequest request) {
try {
request.release();
} finally {
if (terminateEventPublisher != ApplicationEventPublisher.NO_OP) {
ctx.executor().execute(() -> {
try {
terminateEventPublisher.publishEvent(new HttpRequestTerminatedEvent(request));
} catch (Exception e) {
if (LOG.isErrorEnabled()) {
LOG.error("Error publishing request terminated event: " + e.getMessage(), e);
}
}
});
}
}
}
@Override
public void userEventTriggered(ChannelHandlerContext ctx, Object evt) throws Exception {
try {
if (evt instanceof IdleStateEvent) {
IdleStateEvent idleStateEvent = (IdleStateEvent) evt;
IdleState state = idleStateEvent.state();
if (state == IdleState.ALL_IDLE) {
ctx.close();
}
}
} finally {
super.userEventTriggered(ctx, evt);
}
}
@Override
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
// short-circuit ignorable exceptions: This is also handled by RouteExecutor, but handling this early avoids
// running any filters
if (isIgnorable(cause)) {
if (LOG.isDebugEnabled()) {
LOG.debug("Swallowed an IOException caused by client connectivity: " + cause.getMessage(), cause);
}
return;
}
NettyHttpRequest<?> nettyHttpRequest = NettyHttpRequest.remove(ctx);
if (nettyHttpRequest == null) {
if (cause instanceof SSLException || cause.getCause() instanceof SSLException) {
if (LOG.isDebugEnabled()) {
LOG.debug("Micronaut Server Error - No request state present. Cause: " + cause.getMessage(), cause);
}
} else {
if (LOG.isErrorEnabled()) {
LOG.error("Micronaut Server Error - No request state present. Cause: " + cause.getMessage(), cause);
}
}
ctx.writeAndFlush(new DefaultFullHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.INTERNAL_SERVER_ERROR));
return;
}
ServerRequestContext.set(nettyHttpRequest);
filterAndEncodeResponse(
ctx,
nettyHttpRequest,
routeExecutor.onError(cause, nettyHttpRequest));
}
@Override
protected void channelRead0(ChannelHandlerContext ctx, io.micronaut.http.HttpRequest<?> request) {
ctx.channel().config().setAutoRead(false);
io.micronaut.http.HttpMethod httpMethod = request.getMethod();
String requestPath = request.getUri().getPath();
ServerRequestContext.set(request);
if (LOG.isDebugEnabled()) {
LOG.debug("Request {} {}", httpMethod, request.getUri());
}
NettyHttpRequest nettyHttpRequest = (NettyHttpRequest) request;
io.netty.handler.codec.http.HttpRequest nativeRequest = nettyHttpRequest.getNativeRequest();
// handle decoding failure
DecoderResult decoderResult = nativeRequest.decoderResult();
if (decoderResult.isFailure()) {
Throwable cause = decoderResult.cause();
HttpStatus status = cause instanceof TooLongFrameException ? HttpStatus.REQUEST_ENTITY_TOO_LARGE : HttpStatus.BAD_REQUEST;
handleStatusError(
ctx,
nettyHttpRequest,
HttpResponse.status(status),
status.getReason()
);
return;
}
MediaType contentType = request.getContentType().orElse(null);
final String requestMethodName = request.getMethodName();
if (!multipartEnabled &&
contentType != null &&
contentType.equals(MediaType.MULTIPART_FORM_DATA_TYPE)) {
if (LOG.isDebugEnabled()) {
LOG.debug("Multipart uploads have been disabled via configuration. Rejected request for URI {}, method {}, and content type {}", request.getUri(),
requestMethodName, contentType);
}
handleStatusError(
ctx,
nettyHttpRequest,
HttpResponse.status(HttpStatus.UNSUPPORTED_MEDIA_TYPE),
"Content Type [" + contentType + "] not allowed");
return;
}
UriRouteMatch<Object, Object> routeMatch = null;
List<UriRouteMatch<Object, Object>> uriRoutes = router.findAllClosest(request);
if (uriRoutes.size() > 1) {
throw new DuplicateRouteException(requestPath, uriRoutes);
} else if (uriRoutes.size() == 1) {
UriRouteMatch<Object, Object> establishedRoute = uriRoutes.get(0);
request.setAttribute(HttpAttributes.ROUTE, establishedRoute.getRoute());
request.setAttribute(HttpAttributes.ROUTE_MATCH, establishedRoute);
request.setAttribute(HttpAttributes.ROUTE_INFO, establishedRoute);
request.setAttribute(HttpAttributes.URI_TEMPLATE, establishedRoute.getRoute().getUriMatchTemplate().toString());
routeMatch = establishedRoute;
}
RouteMatch<?> route;
if (routeMatch == null) {
//Check if there is a file for the route before returning route not found
Optional<? extends FileCustomizableResponseType> optionalFile = matchFile(requestPath);
if (optionalFile.isPresent()) {
filterAndEncodeResponse(ctx, nettyHttpRequest, Flux.just(HttpResponse.ok(optionalFile.get())));
return;
}
if (LOG.isDebugEnabled()) {
LOG.debug("No matching route: {} {}", httpMethod, request.getUri());
}
// if there is no route present try to locate a route that matches a different HTTP method
final List<UriRouteMatch<?, ?>> anyMatchingRoutes = router
.findAny(request.getUri().toString(), request)
.collect(Collectors.toList());
final Collection<MediaType> acceptedTypes = request.accept();
final boolean hasAcceptHeader = CollectionUtils.isNotEmpty(acceptedTypes);
Set<MediaType> acceptableContentTypes = contentType != null ? new HashSet<>(5) : null;
Set<String> allowedMethods = new HashSet<>(5);
Set<MediaType> produceableContentTypes = hasAcceptHeader ? new HashSet<>(5) : null;
for (UriRouteMatch<?, ?> anyRoute : anyMatchingRoutes) {
final String routeMethod = anyRoute.getRoute().getHttpMethodName();
if (!requestMethodName.equals(routeMethod)) {
allowedMethods.add(routeMethod);
}
if (contentType != null && !anyRoute.doesConsume(contentType)) {
acceptableContentTypes.addAll(anyRoute.getRoute().getConsumes());
}
if (hasAcceptHeader && !anyRoute.doesProduce(acceptedTypes)) {
produceableContentTypes.addAll(anyRoute.getRoute().getProduces());
}
}
if (CollectionUtils.isNotEmpty(acceptableContentTypes)) {
if (LOG.isDebugEnabled()) {
LOG.debug("Content type not allowed for URI {}, method {}, and content type {}", request.getUri(),
requestMethodName, contentType);
}
handleStatusError(
ctx,
nettyHttpRequest,
HttpResponse.status(HttpStatus.UNSUPPORTED_MEDIA_TYPE),
"Content Type [" + contentType + "] not allowed. Allowed types: " + acceptableContentTypes);
return;
}
if (CollectionUtils.isNotEmpty(produceableContentTypes)) {
if (LOG.isDebugEnabled()) {
LOG.debug("Content type not allowed for URI {}, method {}, and content type {}", request.getUri(),
requestMethodName, contentType);
}
handleStatusError(
ctx,
nettyHttpRequest,
HttpResponse.status(HttpStatus.NOT_ACCEPTABLE),
"Specified Accept Types " + acceptedTypes + " not supported. Supported types: " + produceableContentTypes);
return;
}
if (!allowedMethods.isEmpty()) {
if (LOG.isDebugEnabled()) {
LOG.debug("Method not allowed for URI {} and method {}", request.getUri(), requestMethodName);
}
handleStatusError(
ctx,
nettyHttpRequest,
HttpResponse.notAllowedGeneric(allowedMethods),
"Method [" + requestMethodName + "] not allowed for URI [" + request.getUri() + "]. Allowed methods: " + allowedMethods);
return;
} else {
handleStatusError(ctx, nettyHttpRequest, HttpResponse.status(HttpStatus.NOT_FOUND), "Page Not Found");
}
return;
} else {
route = routeMatch;
}
if (LOG.isTraceEnabled()) {
if (route instanceof MethodBasedRouteMatch) {
LOG.trace("Matched route {} - {} to controller {}", requestMethodName, requestPath, route.getDeclaringType());
} else {
LOG.trace("Matched route {} - {}", requestMethodName, requestPath);
}
}
// all ok proceed to try and execute the route
if (route.isWebSocketRoute()) {
handleStatusError(
ctx,
nettyHttpRequest,
HttpResponse.status(HttpStatus.BAD_REQUEST),
"Not a WebSocket request");
} else {
handleRouteMatch(route, nettyHttpRequest, ctx);
}
}
private void handleStatusError(
ChannelHandlerContext ctx,
NettyHttpRequest<?> nettyHttpRequest,
MutableHttpResponse<?> defaultResponse,
String message) {
Optional<RouteMatch<Object>> statusRoute = router.findStatusRoute(defaultResponse.status(), nettyHttpRequest);
if (statusRoute.isPresent()) {
RouteMatch<Object> routeMatch = statusRoute.get();
handleRouteMatch(routeMatch, nettyHttpRequest, ctx);
} else {
if (nettyHttpRequest.getMethod() != HttpMethod.HEAD) {
defaultResponse = errorResponseProcessor.processResponse(ErrorContext.builder(nettyHttpRequest)
.errorMessage(message)
.build(), defaultResponse);
if (!defaultResponse.getContentType().isPresent()) {
defaultResponse = defaultResponse.contentType(MediaType.APPLICATION_JSON_TYPE);
}
}
filterAndEncodeResponse(
ctx,
nettyHttpRequest,
Publishers.just(defaultResponse)
);
}
}
private void filterAndEncodeResponse(
ChannelHandlerContext channelContext,
NettyHttpRequest<?> request,
Publisher<MutableHttpResponse<?>> responsePublisher) {
AtomicReference<HttpRequest<?>> requestReference = new AtomicReference<>(request);
Flux.from(routeExecutor.filterPublisher(requestReference, responsePublisher))
.contextWrite(ctx -> ctx.put(ServerRequestContext.KEY, request))
.subscribe(new Subscriber<MutableHttpResponse<?>>() {
Subscription subscription;
AtomicBoolean empty = new AtomicBoolean();
@Override
public void onSubscribe(Subscription s) {
this.subscription = s;
s.request(1);
}
@Override
public void onNext(MutableHttpResponse<?> response) {
empty.set(false);
encodeHttpResponse(
channelContext,
request,
response,
null,
response.body()
);
subscription.request(1);
}
@Override
public void onError(Throwable t) {
empty.set(false);
final MutableHttpResponse<?> response = routeExecutor.createDefaultErrorResponse(request, t);
encodeHttpResponse(
channelContext,
request,
response,
null,
response.body()
);
}
@Override
public void onComplete() {
if (empty.get()) {
channelContext.read();
}
}
});
}
private Optional<? extends FileCustomizableResponseType> matchFile(String path) {
Optional<URL> optionalUrl = staticResourceResolver.resolve(path);
if (optionalUrl.isPresent()) {
try {
URL url = optionalUrl.get();
if (url.getProtocol().equals("file")) {
File file = Paths.get(url.toURI()).toFile();
if (file.exists() && !file.isDirectory() && file.canRead()) {
return Optional.of(new NettySystemFileCustomizableResponseType(file));
}
}
return Optional.of(new NettyStreamedFileCustomizableResponseType(url));
} catch (URISyntaxException e) {
//no-op
}
}
return Optional.empty();
}
private void handleRouteMatch(
RouteMatch<?> originalRoute,
NettyHttpRequest<?> request,
ChannelHandlerContext context) {
// try to fulfill the argument requirements of the route
RouteMatch<?> route = requestArgumentSatisfier.fulfillArgumentRequirements(originalRoute, request, false);
Optional<Argument<?>> bodyArgument = route.getBodyArgument()
.filter(argument -> argument.getAnnotationMetadata().hasAnnotation(Body.class));
// The request body is required, so at this point we must have a StreamedHttpRequest
io.netty.handler.codec.http.HttpRequest nativeRequest = request.getNativeRequest();
Flux<RouteMatch<?>> routeMatchPublisher;
if (!route.isExecutable() &&
io.micronaut.http.HttpMethod.permitsRequestBody(request.getMethod()) &&
nativeRequest instanceof StreamedHttpRequest &&
(!bodyArgument.isPresent() || !route.isSatisfied(bodyArgument.get().getName()))) {
routeMatchPublisher = Mono.<RouteMatch<?>>create(emitter -> httpContentProcessorResolver.resolve(request, route)
.subscribe(buildSubscriber(request, route, emitter))
).flux();
} else {
context.read();
routeMatchPublisher = Flux.just(route);
}
final Flux<MutableHttpResponse<?>> routeResponse = routeExecutor.executeRoute(
request,
true,
routeMatchPublisher
);
routeResponse
.contextWrite(ctx -> ctx.put(ServerRequestContext.KEY, request))
.subscribe(new CompletionAwareSubscriber<HttpResponse<?>>() {
@Override
protected void doOnSubscribe(Subscription subscription) {
subscription.request(1);
}
@Override
protected void doOnNext(HttpResponse<?> message) {
encodeHttpResponse(
context,
request,
toMutableResponse(message),
(Argument<Object>) route.getBodyType(),
message.body()
);
subscription.request(1);
}
@Override
protected void doOnError(Throwable throwable) {
final MutableHttpResponse<?> defaultErrorResponse = routeExecutor
.createDefaultErrorResponse(request, throwable);
encodeHttpResponse(
context,
request,
defaultErrorResponse,
(Argument<Object>) route.getBodyType(),
defaultErrorResponse.body()
);
}
@Override
protected void doOnComplete() {
}
});
}
private Subscriber<Object> buildSubscriber(NettyHttpRequest<?> request,
RouteMatch<?> finalRoute,
MonoSink<RouteMatch<?>> emitter) {
boolean isFormData = request.isFormOrMultipartData();
if (isFormData) {
return new CompletionAwareSubscriber<Object>() {
final boolean alwaysAddContent = request.isFormData();
RouteMatch<?> routeMatch = finalRoute;
final AtomicBoolean executed = new AtomicBoolean(false);
final AtomicLong pressureRequested = new AtomicLong(0);
final ConcurrentHashMap<String, Sinks.Many<Object>> subjectsByDataName = new ConcurrentHashMap<>();
final Collection<Sinks.Many<Object>> downstreamSubscribers = Collections.synchronizedList(new ArrayList<>());
final ConcurrentHashMap<IdentityWrapper, HttpDataReference> dataReferences = new ConcurrentHashMap<>();
final ConversionService conversionService = ConversionService.SHARED;
Subscription s;
final LongConsumer onRequest = num -> pressureRequested.updateAndGet(p -> {
long newVal = p - num;
if (newVal < 0) {
s.request(num - p);
return 0;
} else {
return newVal;
}
});
Flux processFlowable(Sinks.Many<Object> many, HttpDataReference dataReference, boolean controlsFlow) {
Flux flux = many.asFlux();
if (controlsFlow) {
flux = flux.doOnRequest(onRequest);
}
return flux
.doAfterTerminate(() -> {
if (controlsFlow) {
dataReference.destroy();
}
});
}
@Override
protected void doOnSubscribe(Subscription subscription) {
this.s = subscription;
subscription.request(1);
}
@Override
protected void doOnNext(Object message) {
boolean executed = this.executed.get();
if (message instanceof ByteBufHolder) {
if (message instanceof HttpData) {
HttpData data = (HttpData) message;
if (LOG.isTraceEnabled()) {
LOG.trace("Received HTTP Data for request [{}]: {}", request, message);
}
String name = data.getName();
Optional<Argument<?>> requiredInput = routeMatch.getRequiredInput(name);
if (requiredInput.isPresent()) {
Argument<?> argument = requiredInput.get();
Supplier<Object> value;
boolean isPublisher = Publishers.isConvertibleToPublisher(argument.getType());
boolean chunkedProcessing = false;
if (isPublisher) {
HttpDataReference dataReference = dataReferences.computeIfAbsent(new IdentityWrapper(data), key -> new HttpDataReference(data));
Argument typeVariable;
if (StreamingFileUpload.class.isAssignableFrom(argument.getType())) {
typeVariable = ARGUMENT_PART_DATA;
} else {
typeVariable = argument.getFirstTypeVariable().orElse(Argument.OBJECT_ARGUMENT);
}
Class typeVariableType = typeVariable.getType();
Sinks.Many<Object> namedSubject = subjectsByDataName.computeIfAbsent(name, key -> makeDownstreamUnicastProcessor());
chunkedProcessing = PartData.class.equals(typeVariableType) ||
Publishers.isConvertibleToPublisher(typeVariableType) ||
ClassUtils.isJavaLangType(typeVariableType);
if (Publishers.isConvertibleToPublisher(typeVariableType)) {
boolean streamingFileUpload = StreamingFileUpload.class.isAssignableFrom(typeVariableType);
if (streamingFileUpload) {
typeVariable = ARGUMENT_PART_DATA;
} else {
typeVariable = typeVariable.getFirstTypeVariable().orElse(Argument.OBJECT_ARGUMENT);
}
dataReference.subject.getAndUpdate(subject -> {
if (subject == null) {
Sinks.Many<Object> childSubject = makeDownstreamUnicastProcessor();
Flux flowable = processFlowable(childSubject, dataReference, true);
if (streamingFileUpload && data instanceof FileUpload) {
namedSubject.tryEmitNext(new NettyStreamingFileUpload(
(FileUpload) data,
serverConfiguration.getMultipart(),
getIoExecutor(),
(Flux<PartData>) flowable));
} else {
namedSubject.tryEmitNext(flowable);
}
return childSubject;
}
return subject;
});
}
Sinks.Many<Object> subject;
final Sinks.Many<Object> ds = dataReference.subject.get();
if (ds != null) {
subject = ds;
} else {
subject = namedSubject;
}
Object part = data;
if (chunkedProcessing) {
HttpDataReference.Component component;
try {
component = dataReference.addComponent();
if (component == null) {
s.request(1);
return;
}
} catch (IOException e) {
subject.tryEmitError(e);
s.cancel();
return;
}
part = new NettyPartData(dataReference, component);
}
if (data instanceof FileUpload &&
StreamingFileUpload.class.isAssignableFrom(argument.getType())) {
dataReference.upload.getAndUpdate(upload -> {
if (upload == null) {
return new NettyStreamingFileUpload(
(FileUpload) data,
serverConfiguration.getMultipart(),
getIoExecutor(),
(Flux<PartData>) processFlowable(subject, dataReference, true));
}
return upload;
});
}
Optional<?> converted = conversionService.convert(part, typeVariable);
converted.ifPresent(subject::tryEmitNext);
if (data.isCompleted() && chunkedProcessing) {
subject.tryEmitComplete();
}
value = () -> {
StreamingFileUpload upload = dataReference.upload.get();
if (upload != null) {
return upload;
} else {
return processFlowable(namedSubject, dataReference, dataReference.subject.get() == null);
}
};
} else {
if (data instanceof Attribute && !data.isCompleted()) {
request.addContent(data);
s.request(1);
return;
} else {
value = () -> {
if (data.refCnt() > 0) {
return data;
} else {
return null;
}
};
}
}
if (!executed) {
String argumentName = argument.getName();
if (!routeMatch.isSatisfied(argumentName)) {
Object fulfillParamter = value.get();
routeMatch = routeMatch.fulfill(Collections.singletonMap(argumentName, fulfillParamter));
// we need to release the data here. However, if the route argument is a
// ByteBuffer, we need to retain the data until the route is executed. Adding
// the data to the request ensures it is cleaned up after the route completes.
if (!alwaysAddContent && fulfillParamter instanceof ByteBufHolder) {
request.addContent((ByteBufHolder) fulfillParamter);
}
}
if (isPublisher && chunkedProcessing) {
//accounting for the previous request
pressureRequested.incrementAndGet();
}
if (routeMatch.isExecutable() || message instanceof LastHttpContent) {
executeRoute();
executed = true;
}
}
if (alwaysAddContent) {
request.addContent(data);
}
if (!executed || !chunkedProcessing) {
s.request(1);
}
} else {
request.addContent(data);
s.request(1);
}
} else {
request.addContent((ByteBufHolder) message);
s.request(1);
}
} else {
((NettyHttpRequest) request).setBody(message);
s.request(1);
}
}
@Override
protected void doOnError(Throwable t) {
s.cancel();
for (Sinks.Many<Object> subject : downstreamSubscribers) {
subject.tryEmitError(t);
}
emitter.error(t);
}
@Override
protected void doOnComplete() {
for (Sinks.Many<Object> subject : downstreamSubscribers) {
// subjects will ignore the onComplete if they're already done
subject.tryEmitComplete();
}
executeRoute();
}
private Sinks.Many<Object> makeDownstreamUnicastProcessor() {
Sinks.Many<Object> processor = Sinks.many().unicast().onBackpressureBuffer();
downstreamSubscribers.add(processor);
return processor;
}
private void executeRoute() {
if (executed.compareAndSet(false, true)) {
emitter.success(routeMatch);
}
}
};
} else {
return new CompletionAwareSubscriber<Object>() {
private Subscription s;
private RouteMatch<?> routeMatch = finalRoute;
private AtomicBoolean executed = new AtomicBoolean(false);
@Override
protected void doOnSubscribe(Subscription subscription) {
this.s = subscription;
subscription.request(1);
}
@Override
protected void doOnNext(Object message) {
if (message instanceof ByteBufHolder) {
request.addContent((ByteBufHolder) message);
s.request(1);
} else {
((NettyHttpRequest) request).setBody(message);
s.request(1);
}
}
@Override
protected void doOnError(Throwable t) {
s.cancel();
emitter.error(t);
}
@Override
protected void doOnComplete() {
if (executed.compareAndSet(false, true)) {
emitter.success(routeMatch);
}
}
};
}
}
private ExecutorService getIoExecutor() {
ExecutorService executor = this.ioExecutor;
if (executor == null) {
synchronized (this) { // double check
executor = this.ioExecutor;
if (executor == null) {
executor = this.ioExecutorSupplier.get();
this.ioExecutor = executor;
}
}
}
return executor;
}
private void encodeHttpResponse(
ChannelHandlerContext context,
NettyHttpRequest<?> nettyRequest,
MutableHttpResponse<?> response,
@Nullable Argument<Object> bodyType,
Object body) {
boolean isNotHead = nettyRequest.getMethod() != HttpMethod.HEAD;
if (isNotHead) {
if (body instanceof Writable) {
getIoExecutor().execute(() -> {
ByteBuf byteBuf = context.alloc().ioBuffer(128);
ByteBufOutputStream outputStream = new ByteBufOutputStream(byteBuf);
try {
Writable writable = (Writable) body;
writable.writeTo(outputStream, nettyRequest.getCharacterEncoding());
response.body(byteBuf);
if (!response.getContentType().isPresent()) {
response.getAttribute(HttpAttributes.ROUTE_INFO, RouteInfo.class).ifPresent((routeInfo) ->
response.contentType(routeExecutor.resolveDefaultResponseContentType(nettyRequest, routeInfo)));
}
writeFinalNettyResponse(
response,
nettyRequest,
context
);
} catch (IOException e) {
final MutableHttpResponse<?> errorResponse = routeExecutor.createDefaultErrorResponse(nettyRequest, e);
writeFinalNettyResponse(
errorResponse,
nettyRequest,
context
);
}
});
} else if (body instanceof Publisher) {
response.body(null);
DelegateStreamedHttpResponse streamedResponse = new DelegateStreamedHttpResponse(
toNettyResponse(response),
mapToHttpContent(nettyRequest, response, body, context)
);
context.writeAndFlush(streamedResponse);
context.read();
} else {
encodeResponseBody(
context,
nettyRequest,
response,
bodyType,
body
);
writeFinalNettyResponse(
response,
nettyRequest,
context
);
}
} else {
response.body(null);
response.contentType(null);
writeFinalNettyResponse(
response,
nettyRequest,
context
);
}
}
private Flux<HttpContent> mapToHttpContent(NettyHttpRequest<?> request,
MutableHttpResponse<?> response,