org.springframework.web.server.adapter.HttpWebHandlerAdapter Maven / Gradle / Ivy
/*
* Copyright 2002-2018 the original author or 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
*
* 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 org.springframework.web.server.adapter;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import reactor.core.publisher.Mono;
import org.springframework.context.ApplicationContext;
import org.springframework.core.NestedExceptionUtils;
import org.springframework.core.log.LogFormatUtils;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.codec.LoggingCodecSupport;
import org.springframework.http.codec.ServerCodecConfigurer;
import org.springframework.http.server.reactive.HttpHandler;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
import org.springframework.util.StringUtils;
import org.springframework.web.server.ServerWebExchange;
import org.springframework.web.server.WebHandler;
import org.springframework.web.server.handler.WebHandlerDecorator;
import org.springframework.web.server.i18n.AcceptHeaderLocaleContextResolver;
import org.springframework.web.server.i18n.LocaleContextResolver;
import org.springframework.web.server.session.DefaultWebSessionManager;
import org.springframework.web.server.session.WebSessionManager;
/**
* Default adapter of {@link WebHandler} to the {@link HttpHandler} contract.
*
* By default creates and configures a {@link DefaultServerWebExchange} and
* then invokes the target {@code WebHandler}.
*
* @author Rossen Stoyanchev
* @author Sebastien Deleuze
* @since 5.0
*/
public class HttpWebHandlerAdapter extends WebHandlerDecorator implements HttpHandler {
/**
* Dedicated log category for disconnected client exceptions.
*
Servlet containers dn't expose a a client disconnected callback, see
* eclipse-ee4j/servlet-api#44.
*
To avoid filling logs with unnecessary stack traces, we make an
* effort to identify such network failures on a per-server basis, and then
* log under a separate log category a simple one-line message at DEBUG level
* or a full stack trace only at TRACE level.
*/
private static final String DISCONNECTED_CLIENT_LOG_CATEGORY =
"org.springframework.web.server.DisconnectedClient";
/**
* Tomcat: ClientAbortException or EOFException
* Jetty: EofException
* WildFly, GlassFish: java.io.IOException "Broken pipe" (already covered)
*
TODO:
* This definition is currently duplicated between HttpWebHandlerAdapter
* and AbstractSockJsSession. It is a candidate for a common utility class.
* @see #isDisconnectedClientError(Throwable)
*/
private static final Set DISCONNECTED_CLIENT_EXCEPTIONS =
new HashSet<>(Arrays.asList("ClientAbortException", "EOFException", "EofException"));
private static final Log logger = LogFactory.getLog(HttpWebHandlerAdapter.class);
private static final Log lostClientLogger = LogFactory.getLog(DISCONNECTED_CLIENT_LOG_CATEGORY);
private WebSessionManager sessionManager = new DefaultWebSessionManager();
private ServerCodecConfigurer codecConfigurer = ServerCodecConfigurer.create();
private LocaleContextResolver localeContextResolver = new AcceptHeaderLocaleContextResolver();
@Nullable
private ForwardedHeaderTransformer forwardedHeaderTransformer;
@Nullable
private ApplicationContext applicationContext;
/** Whether to log potentially sensitive info (form data at DEBUG, headers at TRACE). */
private boolean enableLoggingRequestDetails = false;
public HttpWebHandlerAdapter(WebHandler delegate) {
super(delegate);
}
/**
* Configure a custom {@link WebSessionManager} to use for managing web
* sessions. The provided instance is set on each created
* {@link DefaultServerWebExchange}.
* By default this is set to {@link DefaultWebSessionManager}.
* @param sessionManager the session manager to use
*/
public void setSessionManager(WebSessionManager sessionManager) {
Assert.notNull(sessionManager, "WebSessionManager must not be null");
this.sessionManager = sessionManager;
}
/**
* Return the configured {@link WebSessionManager}.
*/
public WebSessionManager getSessionManager() {
return this.sessionManager;
}
/**
* Configure a custom {@link ServerCodecConfigurer}. The provided instance is set on
* each created {@link DefaultServerWebExchange}.
*
By default this is set to {@link ServerCodecConfigurer#create()}.
* @param codecConfigurer the codec configurer to use
*/
public void setCodecConfigurer(ServerCodecConfigurer codecConfigurer) {
Assert.notNull(codecConfigurer, "ServerCodecConfigurer is required");
this.codecConfigurer = codecConfigurer;
this.enableLoggingRequestDetails = false;
this.codecConfigurer.getReaders().stream()
.filter(LoggingCodecSupport.class::isInstance)
.forEach(reader -> {
if (((LoggingCodecSupport) reader).isEnableLoggingRequestDetails()) {
this.enableLoggingRequestDetails = true;
}
});
}
/**
* Return the configured {@link ServerCodecConfigurer}.
*/
public ServerCodecConfigurer getCodecConfigurer() {
return this.codecConfigurer;
}
/**
* Configure a custom {@link LocaleContextResolver}. The provided instance is set on
* each created {@link DefaultServerWebExchange}.
*
By default this is set to
* {@link org.springframework.web.server.i18n.AcceptHeaderLocaleContextResolver}.
* @param resolver the locale context resolver to use
*/
public void setLocaleContextResolver(LocaleContextResolver resolver) {
Assert.notNull(resolver, "LocaleContextResolver is required");
this.localeContextResolver = resolver;
}
/**
* Return the configured {@link LocaleContextResolver}.
*/
public LocaleContextResolver getLocaleContextResolver() {
return this.localeContextResolver;
}
/**
* Enable processing of forwarded headers, either extracting and removing,
* or remove only.
*
By default this is not set.
* @param transformer the transformer to use
* @since 5.1
*/
public void setForwardedHeaderTransformer(ForwardedHeaderTransformer transformer) {
Assert.notNull(transformer, "ForwardedHeaderTransformer is required");
this.forwardedHeaderTransformer = transformer;
}
/**
* Return the configured {@link ForwardedHeaderTransformer}.
* @since 5.1
*/
@Nullable
public ForwardedHeaderTransformer getForwardedHeaderTransformer() {
return this.forwardedHeaderTransformer;
}
/**
* Configure the {@code ApplicationContext} associated with the web application,
* if it was initialized with one via
* {@link org.springframework.web.server.adapter.WebHttpHandlerBuilder#applicationContext
* WebHttpHandlerBuilder#applicationContext}.
* @param applicationContext the context
* @since 5.0.3
*/
public void setApplicationContext(ApplicationContext applicationContext) {
this.applicationContext = applicationContext;
}
/**
* Return the configured {@code ApplicationContext}, if any.
* @since 5.0.3
*/
@Nullable
public ApplicationContext getApplicationContext() {
return this.applicationContext;
}
/**
* This method must be invoked after all properties have been set to
* complete initialization.
*/
public void afterPropertiesSet() {
if (logger.isDebugEnabled()) {
String value = this.enableLoggingRequestDetails ?
"shown which may lead to unsafe logging of potentially sensitive data" :
"masked to prevent unsafe logging of potentially sensitive data";
logger.debug("enableLoggingRequestDetails='" + this.enableLoggingRequestDetails +
"': form data and headers will be " + value);
}
}
@Override
public Mono handle(ServerHttpRequest request, ServerHttpResponse response) {
if (this.forwardedHeaderTransformer != null) {
request = this.forwardedHeaderTransformer.apply(request);
}
ServerWebExchange exchange = createExchange(request, response);
LogFormatUtils.traceDebug(logger, traceOn ->
exchange.getLogPrefix() + formatRequest(exchange.getRequest()) +
(traceOn ? ", headers=" + formatHeaders(exchange.getRequest().getHeaders()) : ""));
return getDelegate().handle(exchange)
.doOnSuccess(aVoid -> logResponse(exchange))
.onErrorResume(ex -> handleUnresolvedError(exchange, ex))
.then(Mono.defer(response::setComplete));
}
protected ServerWebExchange createExchange(ServerHttpRequest request, ServerHttpResponse response) {
return new DefaultServerWebExchange(request, response, this.sessionManager,
getCodecConfigurer(), getLocaleContextResolver(), this.applicationContext);
}
private String formatRequest(ServerHttpRequest request) {
String rawQuery = request.getURI().getRawQuery();
String query = StringUtils.hasText(rawQuery) ? "?" + rawQuery : "";
return "HTTP " + request.getMethod() + " \"" + request.getPath() + query + "\"";
}
private void logResponse(ServerWebExchange exchange) {
LogFormatUtils.traceDebug(logger, traceOn -> {
HttpStatus status = exchange.getResponse().getStatusCode();
return exchange.getLogPrefix() + "Completed " + (status != null ? status : "200 OK") +
(traceOn ? ", headers=" + formatHeaders(exchange.getResponse().getHeaders()) : "");
});
}
private String formatHeaders(HttpHeaders responseHeaders) {
return this.enableLoggingRequestDetails ?
responseHeaders.toString() : responseHeaders.isEmpty() ? "{}" : "{masked}";
}
private Mono handleUnresolvedError(ServerWebExchange exchange, Throwable ex) {
ServerHttpRequest request = exchange.getRequest();
ServerHttpResponse response = exchange.getResponse();
String logPrefix = exchange.getLogPrefix();
if (isDisconnectedClientError(ex)) {
if (lostClientLogger.isTraceEnabled()) {
lostClientLogger.trace(logPrefix + "Client went away", ex);
}
else if (lostClientLogger.isDebugEnabled()) {
lostClientLogger.debug(logPrefix + "Client went away: " + ex +
" (stacktrace at TRACE level for '" + DISCONNECTED_CLIENT_LOG_CATEGORY + "')");
}
return Mono.empty();
}
else if (response.setStatusCode(HttpStatus.INTERNAL_SERVER_ERROR)) {
logger.error(logPrefix + "500 Server Error for " + formatRequest(request), ex);
return Mono.empty();
}
else {
// After the response is committed, propagate errors to the server..
logger.error(logPrefix + "Error [" + ex + "] for " + formatRequest(request) +
", but ServerHttpResponse already committed (" + response.getStatusCode() + ")");
return Mono.error(ex);
}
}
private boolean isDisconnectedClientError(Throwable ex) {
String message = NestedExceptionUtils.getMostSpecificCause(ex).getMessage();
message = (message != null ? message.toLowerCase() : "");
String className = ex.getClass().getSimpleName();
return (message.contains("broken pipe") || DISCONNECTED_CLIENT_EXCEPTIONS.contains(className));
}
}