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CSRFRequestDataValueProcessor.java
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CSRFRequestDataValueProcessor.java
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package com.eyallupu.blog.springmvc.controller.csrf;
import java.util.HashMap;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import org.springframework.web.servlet.support.RequestDataValueProcessor;
/**
* A <code>RequestDataValueProcessor</code> that pushes a hidden field with a CSRF token into forms.
* This process implements the {@link #getExtraHiddenFields(HttpServletRequest)} method to push the
* CSRF token obtained from {@link CSRFTokenManager}. To register this processor to automatically process all
* Spring based forms register it as a Spring bean named 'requestDataValueProcessor' as shown below:
* <pre>
* <bean name="requestDataValueProcessor" class="com.eyallupu.blog.springmvc.controller.csrf.CSRFRequestDataValueProcessor"/>
* </pre>
* @author Eyal Lupu
*
*/
public class CSRFRequestDataValueProcessor implements RequestDataValueProcessor {
@Override
public String processAction(HttpServletRequest request, String action) {
return action;
}
@Override
public String processFormFieldValue(HttpServletRequest request, String name, String value, String type) {
return value;
}
@Override
public Map<String, String> getExtraHiddenFields(HttpServletRequest request) {
Map<String, String> hiddenFields = new HashMap<String, String>();
hiddenFields.put(CSRFTokenManager.CSRF_PARAM_NAME, CSRFTokenManager.getTokenForSession(request.getSession()));
return hiddenFields;
}
@Override
public String processUrl(HttpServletRequest request, String url) {
return url;
}
}