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| <pre><span class="sourceLineNo">001</span><a id="line.1">/*</a> |
| <span class="sourceLineNo">002</span><a id="line.2"> * Licensed to the Apache Software Foundation (ASF) under one</a> |
| <span class="sourceLineNo">003</span><a id="line.3"> * or more contributor license agreements. See the NOTICE file</a> |
| <span class="sourceLineNo">004</span><a id="line.4"> * distributed with this work for additional information</a> |
| <span class="sourceLineNo">005</span><a id="line.5"> * regarding copyright ownership. The ASF licenses this file</a> |
| <span class="sourceLineNo">006</span><a id="line.6"> * to you under the Apache License, Version 2.0 (the</a> |
| <span class="sourceLineNo">007</span><a id="line.7"> * "License"); you may not use this file except in compliance</a> |
| <span class="sourceLineNo">008</span><a id="line.8"> * with the License. You may obtain a copy of the License at</a> |
| <span class="sourceLineNo">009</span><a id="line.9"> *</a> |
| <span class="sourceLineNo">010</span><a id="line.10"> * http://www.apache.org/licenses/LICENSE-2.0</a> |
| <span class="sourceLineNo">011</span><a id="line.11"> *</a> |
| <span class="sourceLineNo">012</span><a id="line.12"> * Unless required by applicable law or agreed to in writing,</a> |
| <span class="sourceLineNo">013</span><a id="line.13"> * software distributed under the License is distributed on an</a> |
| <span class="sourceLineNo">014</span><a id="line.14"> * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</a> |
| <span class="sourceLineNo">015</span><a id="line.15"> * KIND, either express or implied. See the License for the</a> |
| <span class="sourceLineNo">016</span><a id="line.16"> * specific language governing permissions and limitations</a> |
| <span class="sourceLineNo">017</span><a id="line.17"> * under the License.</a> |
| <span class="sourceLineNo">018</span><a id="line.18"> */</a> |
| <span class="sourceLineNo">019</span><a id="line.19">package org.apache.shiro.web.filter.authc;</a> |
| <span class="sourceLineNo">020</span><a id="line.20"></a> |
| <span class="sourceLineNo">021</span><a id="line.21">import org.apache.shiro.web.filter.PathMatchingFilter;</a> |
| <span class="sourceLineNo">022</span><a id="line.22"></a> |
| <span class="sourceLineNo">023</span><a id="line.23">import javax.servlet.ServletRequest;</a> |
| <span class="sourceLineNo">024</span><a id="line.24">import javax.servlet.ServletResponse;</a> |
| <span class="sourceLineNo">025</span><a id="line.25"></a> |
| <span class="sourceLineNo">026</span><a id="line.26">/**</a> |
| <span class="sourceLineNo">027</span><a id="line.27"> * Filter that allows access to a path immeidately without performing security checks of any kind.</a> |
| <span class="sourceLineNo">028</span><a id="line.28"> * <p/></a> |
| <span class="sourceLineNo">029</span><a id="line.29"> * This filter is useful primarily in exclusionary policies, where you have defined a url pattern</a> |
| <span class="sourceLineNo">030</span><a id="line.30"> * to require a certain security level, but maybe only subset of urls in that pattern should allow any access.</a> |
| <span class="sourceLineNo">031</span><a id="line.31"> * <p/></a> |
| <span class="sourceLineNo">032</span><a id="line.32"> * For example, if you had a user-only section of a website, you might want to require that access to</a> |
| <span class="sourceLineNo">033</span><a id="line.33"> * any url in that section must be from an authenticated user.</a> |
| <span class="sourceLineNo">034</span><a id="line.34"> * <p/></a> |
| <span class="sourceLineNo">035</span><a id="line.35"> * Here is how that would look in the IniShiroFilter configuration:</a> |
| <span class="sourceLineNo">036</span><a id="line.36"> * <p/></a> |
| <span class="sourceLineNo">037</span><a id="line.37"> * <code>[urls]<br/></a> |
| <span class="sourceLineNo">038</span><a id="line.38"> * /user/** = authc</code></a> |
| <span class="sourceLineNo">039</span><a id="line.39"> * <p/></a> |
| <span class="sourceLineNo">040</span><a id="line.40"> * But if you wanted <code>/user/signup/**</code> to be available to anyone, you have to exclude that path since</a> |
| <span class="sourceLineNo">041</span><a id="line.41"> * it is a subset of the first. This is where the AnonymousFilter ('anon') is useful:</a> |
| <span class="sourceLineNo">042</span><a id="line.42"> * <p/></a> |
| <span class="sourceLineNo">043</span><a id="line.43"> * <code>[urls]<br/></a> |
| <span class="sourceLineNo">044</span><a id="line.44"> * /user/signup/** = anon<br/></a> |
| <span class="sourceLineNo">045</span><a id="line.45"> * /user/** = authc</code>></a> |
| <span class="sourceLineNo">046</span><a id="line.46"> * <p/></a> |
| <span class="sourceLineNo">047</span><a id="line.47"> * Since the url pattern definitions follow a 'first match wins' paradigm, the <code>anon</code> filter will</a> |
| <span class="sourceLineNo">048</span><a id="line.48"> * match the <code>/user/signup/**</code> paths and the <code>/user/**</code> path chain will not be evaluated.</a> |
| <span class="sourceLineNo">049</span><a id="line.49"> *</a> |
| <span class="sourceLineNo">050</span><a id="line.50"> * @since 0.9</a> |
| <span class="sourceLineNo">051</span><a id="line.51"> */</a> |
| <span class="sourceLineNo">052</span><a id="line.52">public class AnonymousFilter extends PathMatchingFilter {</a> |
| <span class="sourceLineNo">053</span><a id="line.53"></a> |
| <span class="sourceLineNo">054</span><a id="line.54"> /**</a> |
| <span class="sourceLineNo">055</span><a id="line.55"> * Always returns <code>true</code> allowing unchecked access to the underlying path or resource.</a> |
| <span class="sourceLineNo">056</span><a id="line.56"> *</a> |
| <span class="sourceLineNo">057</span><a id="line.57"> * @return <code>true</code> always, allowing unchecked access to the underlying path or resource.</a> |
| <span class="sourceLineNo">058</span><a id="line.58"> */</a> |
| <span class="sourceLineNo">059</span><a id="line.59"> @Override</a> |
| <span class="sourceLineNo">060</span><a id="line.60"> protected boolean onPreHandle(ServletRequest request, ServletResponse response, Object mappedValue) {</a> |
| <span class="sourceLineNo">061</span><a id="line.61"> // Always return true since we allow access to anyone</a> |
| <span class="sourceLineNo">062</span><a id="line.62"> return true;</a> |
| <span class="sourceLineNo">063</span><a id="line.63"> }</a> |
| <span class="sourceLineNo">064</span><a id="line.64"></a> |
| <span class="sourceLineNo">065</span><a id="line.65">}</a> |
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