spring UrlBasedCorsConfigurationSource 源码
spring UrlBasedCorsConfigurationSource 代码
文件路径：/spring-web/src/main/java/org/springframework/web/cors/reactive/UrlBasedCorsConfigurationSource.java
/*
* Copyright 2002-2020 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.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;
/**
* {@code CorsConfigurationSource} that uses URL patterns to select the
* {@code CorsConfiguration} for a request.
*
* @author Sebastien Deleuze
* @author Brian Clozel
* @since 5.0
* @see PathPattern
*/
public class UrlBasedCorsConfigurationSource implements CorsConfigurationSource {
private final PathPatternParser patternParser;
private final Map<PathPattern, CorsConfiguration> corsConfigurations = new LinkedHashMap<>();
/**
* Construct a new {@code UrlBasedCorsConfigurationSource} instance with default
* {@code PathPatternParser}.
* @since 5.0.6
*/
public UrlBasedCorsConfigurationSource() {
this(PathPatternParser.defaultInstance);
}
/**
* Construct a new {@code UrlBasedCorsConfigurationSource} instance from the supplied
* {@code PathPatternParser}.
*/
public UrlBasedCorsConfigurationSource(PathPatternParser patternParser) {
this.patternParser = patternParser;
}
/**
* Set CORS configuration based on URL patterns.
*/
public void setCorsConfigurations(@Nullable Map<String, CorsConfiguration> configMap) {
this.corsConfigurations.clear();
if (configMap != null) {
configMap.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 path = exchange.getRequest().getPath().pathWithinApplication();
for (Map.Entry<PathPattern, CorsConfiguration> entry : this.corsConfigurations.entrySet()) {
if (entry.getKey().matches(path)) {
return entry.getValue();
}
}
return null;
}
}
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