35 lines
1.1 KiB
Text
35 lines
1.1 KiB
Text
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[[_adapter_error_handling]]
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==== Error Handling
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{{book.project.name}} has some error handling facilities for servlet based client adapters.
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When an error is encountered in authentication, {{book.project.name}} will call `HttpServletResponse.sendError()`.
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You can set up an error-page within your `web.xml` file to handle the error however you want.
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{{book.project.name}} can throw 400, 401, 403, and 500 errors.
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[source,xml]
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----
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<error-page>
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<error-code>403</error-code>
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<location>/ErrorHandler</location>
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</error-page>
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----
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{{book.project.name}} also sets a `HttpServletRequest` attribute that you can retrieve.
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The attribute name is `org.keycloak.adapters.spi.AuthenticationError`, which should be casted to `org.keycloak.adapters.OIDCAuthenticationError`.
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For example:
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[source,java]
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----
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import org.keycloak.adapters.OIDCAuthenticationError;
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import org.keycloak.adapters.OIDCAuthenticationError.Reason;
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...
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OIDCAuthenticationError error = (OIDCAuthenticationError) httpServletRequest
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.getAttribute('org.keycloak.adapters.spi.AuthenticationError');
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Reason reason = error.getReason();
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System.out.println(reason.name());
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----
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