filterinvocationdefinitionsourcedynamicextentioneditor.java

ACEGI数据库保存 ACEGI数据库保存 ACEGI数据库保存

/*
 * Copyright 2004-2005 wangz.
 * Project shufe_newsroom
 */
package com.skyon.um.security.acegi.intercept.web;

import java.beans.PropertyEditorSupport;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.StringReader;

import net.sf.acegisecurity.ConfigAttributeDefinition;
import net.sf.acegisecurity.ConfigAttributeEditor;
import net.sf.acegisecurity.intercept.web.FilterInvocationDefinitionMap;
import net.sf.acegisecurity.intercept.web.PathBasedFilterInvocationDefinitionMap;
import net.sf.acegisecurity.intercept.web.RegExpBasedFilterInvocationDefinitionMap;

import org.apache.commons.lang.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * @since 2005-8-4
 * @author 王政
 * @version $Id: FilterInvocationDefinitionSourceDynamicExtentionEditor.java,v 1.2 2005/11/04 15:55:07 wangzheng Exp $
 */
public class FilterInvocationDefinitionSourceDynamicExtentionEditor extends
        PropertyEditorSupport {

    public static final String ANT_PATH_KEY = "PATTERN_TYPE_APACHE_ANT";
    
    public static final String LOWER_CASE_URL_KEY = "CONVERT_URL_TO_LOWERCASE_BEFORE_COMPARISON";

    public static final String DONT_USE_ME_KEY = "DONT_USE_ME";
    
    public static final String STAND_DELIM_CHARACTER = ",";

    private static final Log logger = LogFactory.getLog(FilterInvocationDefinitionSourceDynamicExtentionEditor.class);
    
    /**
     * @see java.beans.PropertyEditorSupport#setAsText(java.lang.String)
     */
    public void setAsText(String text) throws IllegalArgumentException {                
        FilterInvocationDefinitionMap source = new RegExpBasedFilterInvocationDefinitionMap();
               
        if (StringUtils.isBlank(text)) {
            // Leave target object empty
        } else {         
            // Check if we need to override the default definition map
            if (text.lastIndexOf(ANT_PATH_KEY) != -1) {
                source = new PathBasedFilterInvocationDefinitionMap();

                if (logger.isDebugEnabled()) {
                    logger.debug(("Detected PATTERN_TYPE_APACHE_ANT directive; using Apache Ant style path expressions"));
                }
            }

            if (text.lastIndexOf(LOWER_CASE_URL_KEY) != -1) {
                if (logger.isDebugEnabled()) {
                    logger.debug("Instructing mapper to convert URLs to lowercase before comparison");
                }

                source.setConvertUrlToLowercaseBeforeComparison(true);
            }
            
            if (text.indexOf(DONT_USE_ME_KEY) != -1) {
                if (logger.isDebugEnabled()) {
                    logger.debug("DETECTED " + DONT_USE_ME_KEY + " directive;  skip parse, Use " + EhCacheBasedFilterInvocationDefinitionSourceCache.class + " to parse!");
                }
                addSecureUrl(source, "/dontuseme", "dontuseme");
            } else {
                BufferedReader br = new BufferedReader(new StringReader(text));
                int counter = 0;
                String line;

                while (true) {
                    counter++;

                    try {
                        line = br.readLine();
                    } catch (IOException ioe) {
                        throw new IllegalArgumentException(ioe.getMessage());
                    }

                    if (line == null) {
                        break;
                    }

                    line = line.trim();

                    if (logger.isDebugEnabled()) {
                        logger.debug("Line " + counter + ": " + line);
                    }

                    if (line.startsWith("//")) {
                        continue;
                    }

                    if (line.equals(LOWER_CASE_URL_KEY)) {
                        continue;
                    }

                    if (line.lastIndexOf('=') == -1) {
                        continue;
                    }

                    // Tokenize the line into its name/value tokens
                    String[] nameValue = org.springframework.util.StringUtils.delimitedListToStringArray(line, "=");
                    String name = nameValue[0];
                    String value = nameValue[1];

                    addSecureUrl(source, name, value);                
                }
            }
            


        }

        setValue(source);
    }
    

    /**
     * @param source
     * @param name
     * @param value
     * @throws IllegalArgumentException
     */
    private void addSecureUrl(FilterInvocationDefinitionMap source, String name, String value) 
        throws IllegalArgumentException {
        
        // Convert value to series of security configuration attributes
        ConfigAttributeEditor configAttribEd = new ConfigAttributeEditor();
        configAttribEd.setAsText(value);

        ConfigAttributeDefinition attr = (ConfigAttributeDefinition) configAttribEd.getValue();

        // Register the regular expression and its attribute
        source.addSecureUrl(name, attr);
    }


}