spring security CsrfRequestDataValueProcessor 源码
spring security CsrfRequestDataValueProcessor 代码
文件路径：/web/src/main/java/org/springframework/security/web/servlet/support/csrf/CsrfRequestDataValueProcessor.java
/*
* Copyright 2002-2013 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.servlet.support.csrf;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.regex.Pattern;
import jakarta.servlet.http.HttpServletRequest;
import org.springframework.security.web.csrf.CsrfToken;
import org.springframework.web.servlet.support.RequestDataValueProcessor;
/**
* Integration with Spring Web MVC that automatically adds the {@link CsrfToken} into
* forms with hidden inputs when using Spring tag libraries.
*
* @author Rob Winch
* @since 3.2
*/
public final class CsrfRequestDataValueProcessor implements RequestDataValueProcessor {
private Pattern DISABLE_CSRF_TOKEN_PATTERN = Pattern.compile("(?i)^(GET|HEAD|TRACE|OPTIONS)$");
private String DISABLE_CSRF_TOKEN_ATTR = "DISABLE_CSRF_TOKEN_ATTR";
public String processAction(HttpServletRequest request, String action) {
return action;
}
@Override
public String processAction(HttpServletRequest request, String action, String method) {
if (method != null && this.DISABLE_CSRF_TOKEN_PATTERN.matcher(method).matches()) {
request.setAttribute(this.DISABLE_CSRF_TOKEN_ATTR, Boolean.TRUE);
}
else {
request.removeAttribute(this.DISABLE_CSRF_TOKEN_ATTR);
}
return action;
}
@Override
public String processFormFieldValue(HttpServletRequest request, String name, String value, String type) {
return value;
}
@Override
public Map<String, String> getExtraHiddenFields(HttpServletRequest request) {
if (Boolean.TRUE.equals(request.getAttribute(this.DISABLE_CSRF_TOKEN_ATTR))) {
request.removeAttribute(this.DISABLE_CSRF_TOKEN_ATTR);
return Collections.emptyMap();
}
CsrfToken token = (CsrfToken) request.getAttribute(CsrfToken.class.getName());
if (token == null) {
return Collections.emptyMap();
}
Map<String, String> hiddenFields = new HashMap<>(1);
hiddenFields.put(token.getParameterName(), token.getToken());
return hiddenFields;
}
@Override
public String processUrl(HttpServletRequest request, String url) {
return url;
}
}
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