139. Download favicon.ico after successful login in Spring Boot Shiro

 

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Origin of need :

       From the comments of several netizens : the login page will download favicon.icon, and the page will not jump to index.html . What is the reason for this, can anyone tell me. . . The code is exactly the same. The browser used is Google

       After the bloggers have simulated several times locally, there is indeed a situation that will definitely occur. The normal startup login access will not.

 

Reason analysis :

       Basically, most browsers will request the favicon.ico icon file to display in front of the browser's URL address, and this file is protected by shiro . Why is it protected by shiro ? Look at our configuration file:

<!-- authc: All urls must be authenticated before they can be accessed; anon: All urls can be accessed anonymously-->
 filterChainDefinitionMap.put("/**", "authc");

 

       Here /** is used to intercept, authc indicates that all urls must be authenticated before they can be accessed.

 

Solutions:

       After knowing the reason, then it is very easy to solve, just add a filter:

filterChainDefinitionMap.put("/favicon.ico", "anon");

  

Netizens' thoughts:

       Let go of the static path

filterChainDefinitionMap.put("/static/**", "anon");

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