org.springframework.web.cors.reactive.UrlBasedCorsConfigurationSource 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.cors.reactive;
import java.util.LinkedHashMap;
import java.util.Map;
import org.springframework.http.server.PathContainer;
import org.springframework.lang.Nullable;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.server.ServerWebExchange;
import org.springframework.web.util.pattern.PathPattern;
import org.springframework.web.util.pattern.PathPatternParser;
/**
* Provide a per reactive request {@link CorsConfiguration} instance based on a
* collection of {@link CorsConfiguration} mapped on path patterns.
*
* Exact path mapping URIs (such as {@code "/admin"}) are supported
* as well as Ant-style path patterns (such as {@code "/admin/**"}).
*
* @author Sebastien Deleuze
* @author Brian Clozel
* @since 5.0
*/
public class UrlBasedCorsConfigurationSource implements CorsConfigurationSource {
private final Map corsConfigurations;
private final PathPatternParser patternParser;
/**
* Construct a new {@code UrlBasedCorsConfigurationSource} instance with default
* {@code PathPatternParser}.
* @since 5.0.6
*/
public UrlBasedCorsConfigurationSource() {
this(new PathPatternParser());
}
/**
* Construct a new {@code UrlBasedCorsConfigurationSource} instance from the supplied
* {@code PathPatternParser}.
*/
public UrlBasedCorsConfigurationSource(PathPatternParser patternParser) {
this.corsConfigurations = new LinkedHashMap<>();
this.patternParser = patternParser;
}
/**
* Set CORS configuration based on URL patterns.
*/
public void setCorsConfigurations(@Nullable Map corsConfigurations) {
this.corsConfigurations.clear();
if (corsConfigurations != null) {
corsConfigurations.forEach(this::registerCorsConfiguration);
}
}
/**
* Register a {@link CorsConfiguration} for the specified path pattern.
*/
public void registerCorsConfiguration(String path, CorsConfiguration config) {
this.corsConfigurations.put(this.patternParser.parse(path), config);
}
@Override
@Nullable
public CorsConfiguration getCorsConfiguration(ServerWebExchange exchange) {
PathContainer lookupPath = exchange.getRequest().getPath().pathWithinApplication();
return this.corsConfigurations.entrySet().stream()
.filter(entry -> entry.getKey().matches(lookupPath))
.map(Map.Entry::getValue)
.findFirst()
.orElse(null);
}
}