Internally it preserve a series of filters for doing authentication and authorization. It has filters for offering totally different options and they’re organized in a predefined order e.g. it’s got a ConcurrentSessionFilter to forestall concurrent periods from similar consumer.
However, once more the massive query is how does Servlet container move HTTP request to Spring Safety for authentication and authorization? That is achieved by declaring a particular filter known as DelegatingFilterProxy, this offered the hyperlink between net.xml and Spring’s software context.
With the intention to allow Spring safety in your Java net software, you could declare this DelegatingFilterProxy filter in your net.xml, similar to every other filter however you should specify the identify as springSecurityFilterChain. The identify is essential as a result of the DelegatingFilterProxy which implements FilterChain interface delegates request to filter named “springSecurityFilterChain”.
How request is processed in Spring Safety?
When an HTTP request hit the web-server it’s handed over to DelegatingFilterProxy as a result of its typically configured to intercept all request by specifying wild card (*) in its url-pattern. The DelegatingFilterProxy then move this request to all of the filters that are a part of springSecurityFilterChain.
Relying upon your Spring safety configuration, corresponding filters are instantiated and configured by Spring safety in the beginning of software. For instance, in the event you allow HTTP fundamental safety by calling http.httpBasic() technique (in case you are utilizing Java configuration> or by specifying <http> tag in case you are utilizing XML based mostly Spring safety configuration.
What number of filters a selected request will undergo relies upon upon your Spring safety configuration. If you happen to allow extra functionalities, extra filters shall be employed. You’ll be able to even create your personal customized filters and fasten it into Spring safety filter chain at some pre-defined place e.g. earlier than filter X or after filter X.
That is all about how Spring safety framework works internally. It is essential for a Java and Spring developer to know how precisely spring safety framework works in order that they’ll debug the circulate if there’s a downside e.g. authentication and authorization will not be working as anticipated.
A great information of spring safety structure and work-flow can also be required for customizing spring safety to your wants, for instance if you wish to develop your customized filter then you should know the place so as to add that into spring safety filter chain.
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