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Merge pull request #18566 from Hann244/docs/gh-16530-jsp-method-attribute
Clarify need for method attribute in JSP authorize tag
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@ -63,7 +63,9 @@ To use this tag, you must also have an instance of `WebInvocationPrivilegeEvalua
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If you are using the namespace, one is automatically registered.
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This is an instance of `DefaultWebInvocationPrivilegeEvaluator`, which creates a dummy web request for the supplied URL and invokes the security interceptor to see whether the request would succeed or fail.
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This lets you delegate to the access-control setup you defined by using `intercept-url` declarations within the `<http>` namespace configuration and saves having to duplicate the information (such as the required roles) within your JSPs.
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You can also combine this approach with a `method` attribute (supplying the HTTP method, such as `POST`) for a more specific match.
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If you have xref:servlet/authorization/authorize-http-requests.adoc#match-by-httpmethod[method-based authorization rules], you should combine this approach with the `method` attribute (supplying the HTTP method, such as `POST`) to activate the intended method-based rule.
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For example, if you have a rule `.requestMatchers(POST, "/admin").hasRole("ADMIN")`, then you should do `<sec:authorize method="POST" url="/admin">` to match.
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You can store the Boolean result of evaluating the tag (whether it grants or denies access) in a page context scope variable by setting the `var` attribute to the variable name, avoiding the need for duplicating and re-evaluating the condition at other points in the page.
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