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* Licensed to the Apache Software Foundation (ASF) under one
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* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.shiro.spring.web;
import org.apache.shiro.config.Ini;
import org.apache.shiro.mgt.SecurityManager;
import org.apache.shiro.util.CollectionUtils;
import org.apache.shiro.util.Nameable;
import org.apache.shiro.util.StringUtils;
import org.apache.shiro.web.config.IniFilterChainResolverFactory;
import org.apache.shiro.web.filter.AccessControlFilter;
import org.apache.shiro.web.filter.authc.AuthenticationFilter;
import org.apache.shiro.web.filter.authz.AuthorizationFilter;
import org.apache.shiro.web.filter.mgt.DefaultFilterChainManager;
import org.apache.shiro.web.filter.mgt.FilterChainManager;
import org.apache.shiro.web.filter.mgt.FilterChainResolver;
import org.apache.shiro.web.filter.mgt.PathMatchingFilterChainResolver;
import org.apache.shiro.web.mgt.WebSecurityManager;
import org.apache.shiro.web.servlet.AbstractShiroFilter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.BeanInitializationException;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.beans.factory.config.BeanPostProcessor;
import javax.servlet.Filter;
import java.util.LinkedHashMap;
import java.util.Map;
/**
* {@link org.springframework.beans.factory.FactoryBean FactoryBean} to be used in Spring-based web applications for
* defining the master Shiro Filter.
* <h4>Usage</h4>
* Declare a DelegatingFilterProxy in {@code web.xml}, matching the filter name to the bean id:
* <pre>
* <filter>
* <filter-name><b>shiroFilter</b></filter-name>
* <filter-class>org.springframework.web.filter.DelegatingFilterProxy<filter-class>
* <init-param>
* <param-name>targetFilterLifecycle</param-name>
* <param-value>true</param-value>
* </init-param>
* </filter>
* </pre>
* Then, in your spring XML file that defines your web ApplicationContext:
* <pre>
* <bean id="<b>shiroFilter</b>" class="org.apache.shiro.spring.web.ShiroFilterFactoryBean">
* <property name="securityManager" ref="securityManager"/>
* <!-- other properties as necessary ... -->
* </bean>
* </pre>
* <h4>Filter Auto-Discovery</h4>
* While there is a {@link #setFilters(java.util.Map) filters} property that allows you to assign a filter beans
* to the 'pool' of filters available when defining {@link #setFilterChainDefinitions(String) filter chains}, it is
* optional.
* <p/>
* This implementation is also a {@link BeanPostProcessor} and will acquire
* any {@link javax.servlet.Filter Filter} beans defined independently in your Spring application context. Upon
* discovery, they will be automatically added to the {@link #setFilters(java.util.Map) map} keyed by the bean ID.
* That ID can then be used in the filter chain definitions, for example:
*
* <pre>
* <bean id="<b>myCustomFilter</b>" class="com.class.that.implements.javax.servlet.Filter"/>
* ...
* <bean id="shiroFilter" class="org.apache.shiro.spring.web.ShiroFilterFactoryBean">
* ...
* <property name="filterChainDefinitions">
* <value>
* /some/path/** = authc, <b>myCustomFilter</b>
* </value>
* </property>
* </bean>
* </pre>
* <h4>Global Property Values</h4>
* Most Shiro servlet Filter implementations exist for defining custom Filter
* {@link #setFilterChainDefinitions(String) chain definitions}. Most implementations subclass one of the
* {@link AccessControlFilter}, {@link AuthenticationFilter}, {@link AuthorizationFilter} classes to simplify things,
* and each of these 3 classes has configurable properties that are application-specific.
* <p/>
* A dilemma arises where, if you want to for example set the application's 'loginUrl' for any Filter, you don't want
* to have to manually specify that value for <em>each</em> filter instance definied.
* <p/>
* To prevent configuration duplication, this implementation provides the following properties to allow you
* to set relevant values in only one place:
* <ul>
* <li>{@link #setLoginUrl(String)}</li>
* <li>{@link #setSuccessUrl(String)}</li>
* <li>{@link #setUnauthorizedUrl(String)}</li>
* </ul>
*
* Then at startup, any values specified via these 3 properties will be applied to all configured
* Filter instances so you don't have to specify them individually on each filter instance. To ensure your own custom
* filters benefit from this convenience, your filter implementation should subclass one of the 3 mentioned
* earlier.
*
* @see org.springframework.web.filter.DelegatingFilterProxy DelegatingFilterProxy
* @since 1.0
*/
public class ShiroFilterFactoryBean implements FactoryBean, BeanPostProcessor {
private static transient final Logger log = LoggerFactory.getLogger(ShiroFilterFactoryBean.class);
private SecurityManager securityManager;
private Map<String, Filter> filters;
private Map<String, String> filterChainDefinitionMap; //urlPathExpression_to_comma-delimited-filter-chain-definition
private String loginUrl;
private String successUrl;
private String unauthorizedUrl;
private AbstractShiroFilter instance;
public ShiroFilterFactoryBean() {
this.filters = new LinkedHashMap<String, Filter>();
this.filterChainDefinitionMap = new LinkedHashMap<String, String>(); //order matters!
}
/**
* Sets the application {@code SecurityManager} instance to be used by the constructed Shiro Filter. This is a
* required property - failure to set it will throw an initialization exception.
*
* @return the application {@code SecurityManager} instance to be used by the constructed Shiro Filter.
*/
public SecurityManager getSecurityManager() {
return securityManager;
}
/**
* Sets the application {@code SecurityManager} instance to be used by the constructed Shiro Filter. This is a
* required property - failure to set it will throw an initialization exception.
*
* @param securityManager the application {@code SecurityManager} instance to be used by the constructed Shiro Filter.
*/
public void setSecurityManager(SecurityManager securityManager) {
this.securityManager = securityManager;
}
/**
* Returns the application's login URL to be assigned to all acquired Filters that subclass
* {@link AccessControlFilter} or {@code null} if no value should be assigned globally. The default value
* is {@code null}.
*
* @return the application's login URL to be assigned to all acquired Filters that subclass
* {@link AccessControlFilter} or {@code null} if no value should be assigned globally.
* @see #setLoginUrl
*/
public String getLoginUrl() {
return loginUrl;
}
/**
* Sets the application's login URL to be assigned to all acquired Filters that subclass
* {@link AccessControlFilter}. This is a convenience mechanism: for all configured {@link #setFilters filters},
* as well for any default ones ({@code authc}, {@code user}, etc), this value will be passed on to each Filter
* via the {@link AccessControlFilter#setLoginUrl(String)} method<b>*</b>. This eliminates the need to
* configure the 'loginUrl' property manually on each filter instance, and instead that can be configured once
* via this attribute.
* <p/>
* <b>*</b>If a filter already has already been explicitly configured with a value, it will
* <em>not</em> receive this value. Individual filter configuration overrides this global convenience property.
*
* @param loginUrl the application's login URL to apply to as a convenience to all discovered
* {@link AccessControlFilter} instances.
* @see AccessControlFilter#setLoginUrl(String)
*/
public void setLoginUrl(String loginUrl) {
this.loginUrl = loginUrl;
}
/**
* Returns the application's after-login success URL to be assigned to all acquired Filters that subclass
* {@link AuthenticationFilter} or {@code null} if no value should be assigned globally. The default value
* is {@code null}.
*
* @return the application's after-login success URL to be assigned to all acquired Filters that subclass
* {@link AuthenticationFilter} or {@code null} if no value should be assigned globally.
* @see #setSuccessUrl
*/
public String getSuccessUrl() {
return successUrl;
}
/**
* Sets the application's after-login success URL to be assigned to all acquired Filters that subclass
* {@link AuthenticationFilter}. This is a convenience mechanism: for all configured {@link #setFilters filters},
* as well for any default ones ({@code authc}, {@code user}, etc), this value will be passed on to each Filter
* via the {@link AuthenticationFilter#setSuccessUrl(String)} method<b>*</b>. This eliminates the need to
* configure the 'successUrl' property manually on each filter instance, and instead that can be configured once
* via this attribute.
* <p/>
* <b>*</b>If a filter already has already been explicitly configured with a value, it will
* <em>not</em> receive this value. Individual filter configuration overrides this global convenience property.
*
* @param successUrl the application's after-login success URL to apply to as a convenience to all discovered
* {@link AccessControlFilter} instances.
* @see AuthenticationFilter#setSuccessUrl(String)
*/
public void setSuccessUrl(String successUrl) {
this.successUrl = successUrl;
}
/**
* Returns the application's after-login success URL to be assigned to all acquired Filters that subclass
* {@link AuthenticationFilter} or {@code null} if no value should be assigned globally. The default value
* is {@code null}.
*
* @return the application's after-login success URL to be assigned to all acquired Filters that subclass
* {@link AuthenticationFilter} or {@code null} if no value should be assigned globally.
* @see #setSuccessUrl
*/
public String getUnauthorizedUrl() {
return unauthorizedUrl;
}
/**
* Sets the application's 'unauthorized' URL to be assigned to all acquired Filters that subclass
* {@link AuthorizationFilter}. This is a convenience mechanism: for all configured {@link #setFilters filters},
* as well for any default ones ({@code roles}, {@code perms}, etc), this value will be passed on to each Filter
* via the {@link AuthorizationFilter#setUnauthorizedUrl(String)} method<b>*</b>. This eliminates the need to
* configure the 'unauthorizedUrl' property manually on each filter instance, and instead that can be configured once
* via this attribute.
* <p/>
* <b>*</b>If a filter already has already been explicitly configured with a value, it will
* <em>not</em> receive this value. Individual filter configuration overrides this global convenience property.
*
* @param unauthorizedUrl the application's 'unauthorized' URL to apply to as a convenience to all discovered
* {@link AuthorizationFilter} instances.
* @see AuthorizationFilter#setUnauthorizedUrl(String)
*/
public void setUnauthorizedUrl(String unauthorizedUrl) {
this.unauthorizedUrl = unauthorizedUrl;
}
/**
* Returns the filterName-to-Filter map of filters available for reference when defining filter chain definitions.
* All filter chain definitions will reference filters by the names in this map (i.e. the keys).
*
* @return the filterName-to-Filter map of filters available for reference when defining filter chain definitions.
*/
public Map<String, Filter> getFilters() {
return filters;
}
/**
* Sets the filterName-to-Filter map of filters available for reference when creating
* {@link #setFilterChainDefinitionMap(java.util.Map) filter chain definitions}.
* <p/>
* <b>Note:</b> This property is optional: this {@code FactoryBean} implementation will discover all beans in the
* web application context that implement the {@link Filter} interface and automatically add them to this filter
* map under their bean name.
* <p/>
* For example, just defining this bean in a web Spring XML application context:
* <pre>
* <bean id="myFilter" class="com.class.that.implements.javax.servlet.Filter">
* ...
* </bean></pre>
* Will automatically place that bean into this Filters map under the key '<b>myFilter</b>'.
*
* @param filters the optional filterName-to-Filter map of filters available for reference when creating
* {@link #setFilterChainDefinitionMap (java.util.Map) filter chain definitions}.
*/
public void setFilters(Map<String, Filter> filters) {
this.filters = filters;
}
/**
* Returns the chainName-to-chainDefinition map of chain definitions to use for creating filter chains intercepted
* by the Shiro Filter. Each map entry should conform to the format defined by the
* {@link FilterChainManager#createChain(String, String)} JavaDoc, where the map key is the chain name (e.g. URL
* path expression) and the map value is the comma-delimited string chain definition.
*
* @return he chainName-to-chainDefinition map of chain definitions to use for creating filter chains intercepted
* by the Shiro Filter.
*/
public Map<String, String> getFilterChainDefinitionMap() {
return filterChainDefinitionMap;
}
/**
* Sets the chainName-to-chainDefinition map of chain definitions to use for creating filter chains intercepted
* by the Shiro Filter. Each map entry should conform to the format defined by the
* {@link FilterChainManager#createChain(String, String)} JavaDoc, where the map key is the chain name (e.g. URL
* path expression) and the map value is the comma-delimited string chain definition.
*
* @param filterChainDefinitionMap the chainName-to-chainDefinition map of chain definitions to use for creating
* filter chains intercepted by the Shiro Filter.
*/
public void setFilterChainDefinitionMap(Map<String, String> filterChainDefinitionMap) {
this.filterChainDefinitionMap = filterChainDefinitionMap;
}
/**
* A convenience method that sets the {@link #setFilterChainDefinitionMap(java.util.Map) filterChainDefinitionMap}
* property by accepting a {@link java.util.Properties Properties}-compatible string (multi-line key/value pairs).
* Each key/value pair must conform to the format defined by the
* {@link FilterChainManager#createChain(String,String)} JavaDoc - each property key is an ant URL
* path expression and the value is the comma-delimited chain definition.
*
* @param definitions a {@link java.util.Properties Properties}-compatible string (multi-line key/value pairs)
* where each key/value pair represents a single urlPathExpression-commaDelimitedChainDefinition.
*/
public void setFilterChainDefinitions(String definitions) {
Ini ini = new Ini();
ini.load(definitions);
//did they explicitly state a 'urls' section? Not necessary, but just in case:
Ini.Section section = ini.getSection(IniFilterChainResolverFactory.URLS);
if (CollectionUtils.isEmpty(section)) {
//no urls section. Since this _is_ a urls chain definition property, just assume the
//default section contains only the definitions:
section = ini.getSection(Ini.DEFAULT_SECTION_NAME);
}
setFilterChainDefinitionMap(section);
}
/**
* Lazily creates and returns a {@link AbstractShiroFilter} concrete instance via the
* {@link #createInstance} method.
*
* @return the application's Shiro Filter instance used to filter incoming web requests.
* @throws Exception if there is a problem creating the {@code Filter} instance.
*/
public Object getObject() throws Exception {
if (instance == null) {
instance = createInstance();
}
return instance;
}
/**
* Returns <code>{@link org.apache.shiro.web.servlet.AbstractShiroFilter}.class</code>
*
* @return <code>{@link org.apache.shiro.web.servlet.AbstractShiroFilter}.class</code>
*/
public Class getObjectType() {
return SpringShiroFilter.class;
}
/**
* Returns {@code true} always. There is almost always only ever 1 Shiro {@code Filter} per web application.
*
* @return {@code true} always. There is almost always only ever 1 Shiro {@code Filter} per web application.
*/
public boolean isSingleton() {
return true;
}
protected FilterChainManager createFilterChainManager() {
DefaultFilterChainManager manager = new DefaultFilterChainManager();
Map<String, Filter> defaultFilters = manager.getFilters();
//apply global settings if necessary:
for (Filter filter : defaultFilters.values()) {
applyGlobalPropertiesIfNecessary(filter);
}
//Apply the acquired and/or configured filters:
Map<String, Filter> filters = getFilters();
if (!CollectionUtils.isEmpty(filters)) {
for (Map.Entry<String, Filter> entry : filters.entrySet()) {
String name = entry.getKey();
Filter filter = entry.getValue();
applyGlobalPropertiesIfNecessary(filter);
if (filter instanceof Nameable) {
((Nameable) filter).setName(name);
}
//'init' argument is false, since Spring-configured filters should be initialized
//in Spring (i.e. 'init-method=blah') or implement InitializingBean:
manager.addFilter(name, filter, false);
}
}
//build up the chains:
Map<String, String> chains = getFilterChainDefinitionMap();
if (!CollectionUtils.isEmpty(chains)) {
for (Map.Entry<String, String> entry : chains.entrySet()) {
String url = entry.getKey();
String chainDefinition = entry.getValue();
manager.createChain(url, chainDefinition);
}
}
return manager;
}
/**
* This implementation:
* <ol>
* <li>Ensures the required {@link #setSecurityManager(org.apache.shiro.mgt.SecurityManager) securityManager}
* property has been set</li>
* <li>{@link #createFilterChainManager() Creates} a {@link FilterChainManager} instance that reflects the
* configured {@link #setFilters(java.util.Map) filters} and
* {@link #setFilterChainDefinitionMap(java.util.Map) filter chain definitions}</li>
* <li>Wraps the FilterChainManager with a suitable
* {@link org.apache.shiro.web.filter.mgt.FilterChainResolver FilterChainResolver} since the Shiro Filter
* implementations do not know of {@code FilterChainManager}s</li>
* <li>Sets both the {@code SecurityManager} and {@code FilterChainResolver} instances on a new Shiro Filter
* instance and returns that filter instance.</li>
* </ol>
*
* @return a new Shiro Filter reflecting any configured filters and filter chain definitions.
* @throws Exception if there is a problem creating the AbstractShiroFilter instance.
*/
protected AbstractShiroFilter createInstance() throws Exception {
log.debug("Creating Shiro Filter instance.");
SecurityManager securityManager = getSecurityManager();
if (securityManager == null) {
String msg = "SecurityManager property must be set.";
throw new BeanInitializationException(msg);
}
if (!(securityManager instanceof WebSecurityManager)) {
String msg = "The security manager does not implement the WebSecurityManager interface.";
throw new BeanInitializationException(msg);
}
FilterChainManager manager = createFilterChainManager();
//Expose the constructed FilterChainManager by first wrapping it in a
// FilterChainResolver implementation. The AbstractShiroFilter implementations
// do not know about FilterChainManagers - only resolvers:
PathMatchingFilterChainResolver chainResolver = new PathMatchingFilterChainResolver();
chainResolver.setFilterChainManager(manager);
//Now create a concrete ShiroFilter instance and apply the acquired SecurityManager and built
//FilterChainResolver. It doesn't matter that the instance is an anonymous inner class
//here - we're just using it because it is a concrete AbstractShiroFilter instance that accepts
//injection of the SecurityManager and FilterChainResolver:
return new SpringShiroFilter((WebSecurityManager) securityManager, chainResolver);
}
private void applyLoginUrlIfNecessary(Filter filter) {
String loginUrl = getLoginUrl();
if (StringUtils.hasText(loginUrl) && (filter instanceof AccessControlFilter)) {
AccessControlFilter acFilter = (AccessControlFilter) filter;
//only apply the login url if they haven't explicitly configured one already:
String existingLoginUrl = acFilter.getLoginUrl();
if (AccessControlFilter.DEFAULT_LOGIN_URL.equals(existingLoginUrl)) {
acFilter.setLoginUrl(loginUrl);
}
}
}
private void applySuccessUrlIfNecessary(Filter filter) {
String successUrl = getSuccessUrl();
if (StringUtils.hasText(successUrl) && (filter instanceof AuthenticationFilter)) {
AuthenticationFilter authcFilter = (AuthenticationFilter) filter;
//only apply the successUrl if they haven't explicitly configured one already:
String existingSuccessUrl = authcFilter.getSuccessUrl();
if (AuthenticationFilter.DEFAULT_SUCCESS_URL.equals(existingSuccessUrl)) {
authcFilter.setSuccessUrl(successUrl);
}
}
}
private void applyUnauthorizedUrlIfNecessary(Filter filter) {
String unauthorizedUrl = getUnauthorizedUrl();
if (StringUtils.hasText(unauthorizedUrl) && (filter instanceof AuthorizationFilter)) {
AuthorizationFilter authzFilter = (AuthorizationFilter) filter;
//only apply the unauthorizedUrl if they haven't explicitly configured one already:
String existingUnauthorizedUrl = authzFilter.getUnauthorizedUrl();
if (existingUnauthorizedUrl == null) {
authzFilter.setUnauthorizedUrl(unauthorizedUrl);
}
}
}
private void applyGlobalPropertiesIfNecessary(Filter filter) {
applyLoginUrlIfNecessary(filter);
applySuccessUrlIfNecessary(filter);
applyUnauthorizedUrlIfNecessary(filter);
}
/**
* Inspects a bean, and if it implements the {@link Filter} interface, automatically adds that filter
* instance to the internal {@link #setFilters(java.util.Map) filters map} that will be referenced
* later during filter chain construction.
*/
public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
if (bean instanceof Filter) {
log.debug("Found filter chain candidate filter '{}'", beanName);
Filter filter = (Filter) bean;
applyGlobalPropertiesIfNecessary(filter);
getFilters().put(beanName, filter);
} else {
log.trace("Ignoring non-Filter bean '{}'", beanName);
}
return bean;
}
/**
* Does nothing - only exists to satisfy the BeanPostProcessor interface and immediately returns the
* {@code bean} argument.
*/
public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
return bean;
}
/**
* Ordinarily the {@code AbstractShiroFilter} must be subclassed to additionally perform configuration
* and initialization behavior. Because this {@code FactoryBean} implementation manually builds the
* {@link AbstractShiroFilter}'s
* {@link AbstractShiroFilter#setSecurityManager(org.apache.shiro.web.mgt.WebSecurityManager) securityManager} and
* {@link AbstractShiroFilter#setFilterChainResolver(org.apache.shiro.web.filter.mgt.FilterChainResolver) filterChainResolver}
* properties, the only thing left to do is set those properties explicitly. We do that in a simple
* concrete subclass in the constructor.
*/
private static final class SpringShiroFilter extends AbstractShiroFilter {
protected SpringShiroFilter(WebSecurityManager webSecurityManager, FilterChainResolver resolver) {
super();
if (webSecurityManager == null) {
throw new IllegalArgumentException("WebSecurityManager property cannot be null.");
}
setSecurityManager(webSecurityManager);
if (resolver != null) {
setFilterChainResolver(resolver);
}
}
}
}