Struts2 Wildcard Mapping - more specific one is being handled by generic one

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半阙折子戏
半阙折子戏 2020-12-19 20:27

I\'m currently playing around with my Struts2 config for wildcard testing and I\'m stuck with this one.

    

        
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  • 2020-12-19 20:51

    You are using slashes in action name, that incorrectly works with wildcard mapper. As I said in the linked answer, the best pattern matcher in this case is the regex pattern matcher.

    <constant name="struts.patternMatcher" value="regex"/>
    

    See Advanced Wildcards.

    <action name="/{blogSiteUrl}/{test}" class="checkBlogUrl" method="testing">
        <result name="success">/WEB-INF/jsp/cmsPages/index.jsp</result>
    </action>
    
    <action name="/{blogSiteUrl}/postPreview1" class="blogPostAction" method="test">
        <result name="success">/WEB-INF/jsp/cmsPages/templatePicker.jsp</result>
    </action>
    

    About docs for wildcard mapper. Lets look at the example blank application:

    <package name="example" namespace="/example" extends="default">
    
        <action name="HelloWorld" class="example.HelloWorld">
            <result>/WEB-INF/jsp/example/HelloWorld.jsp</result>
        </action>
    
        <action name="Login_*" method="{1}" class="example.Login">
            <result name="input">/WEB-INF/jsp/example/Login.jsp</result>
            <result type="redirectAction">Menu</result>
        </action>
    
        <action name="*" class="example.ExampleSupport">
            <result>/WEB-INF/jsp/example/{1}.jsp</result>
        </action>
    
        <!-- Add actions here -->
    </package>
    

    So URLs will be matched in the order:

    1. http://localhost:8080/example/HelloWorld
    2. http://localhost:8080/example/Login_input
    3. http://localhost:8080/example/Register

    I would say that more specific mapping goes before less specific/common mapping and it wins because it's found first in the order of action configs. Everything that doesn't match the ordered configs fall into last mapping which is less specific.

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