spring security ExchangeMatcherRedirectWebFilter 源码
spring security ExchangeMatcherRedirectWebFilter 代码
文件路径：/web/src/main/java/org/springframework/security/web/server/ExchangeMatcherRedirectWebFilter.java
/*
* Copyright 2002-2021 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
*
* 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 org.springframework.security.web.server;
import java.net.URI;
import reactor.core.publisher.Mono;
import org.springframework.security.web.server.util.matcher.ServerWebExchangeMatcher;
import org.springframework.security.web.server.util.matcher.ServerWebExchangeMatcher.MatchResult;
import org.springframework.util.Assert;
import org.springframework.web.server.ServerWebExchange;
import org.springframework.web.server.WebFilter;
import org.springframework.web.server.WebFilterChain;
/**
* Web filter that redirects requests that match {@link ServerWebExchangeMatcher} to the
* specified URL.
*
* @author Evgeniy Cheban
* @since 5.6
*/
public final class ExchangeMatcherRedirectWebFilter implements WebFilter {
private final ServerRedirectStrategy redirectStrategy = new DefaultServerRedirectStrategy();
private final ServerWebExchangeMatcher exchangeMatcher;
private final URI redirectUri;
/**
* Create and initialize an instance of the web filter.
* @param exchangeMatcher the exchange matcher
* @param redirectUrl the redirect URL
*/
public ExchangeMatcherRedirectWebFilter(ServerWebExchangeMatcher exchangeMatcher, String redirectUrl) {
Assert.notNull(exchangeMatcher, "exchangeMatcher cannot be null");
Assert.hasText(redirectUrl, "redirectUrl cannot be empty");
this.exchangeMatcher = exchangeMatcher;
this.redirectUri = URI.create(redirectUrl);
}
/**
* {@inheritDoc}
*/
@Override
public Mono<Void> filter(ServerWebExchange exchange, WebFilterChain chain) {
// @formatter:off
return this.exchangeMatcher.matches(exchange)
.filter(MatchResult::isMatch)
.switchIfEmpty(chain.filter(exchange).then(Mono.empty()))
.flatMap((result) -> this.redirectStrategy.sendRedirect(exchange, this.redirectUri));
// @formatter:on
}
}
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