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Official Security Solution for Micronaut

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/*
 * Copyright 2017-2023 original authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.micronaut.security.authentication;

import io.micronaut.context.annotation.Primary;
import io.micronaut.context.annotation.Requires;
import io.micronaut.http.HttpRequest;
import io.micronaut.http.HttpResponse;
import io.micronaut.http.HttpStatus;
import io.micronaut.http.MutableHttpResponse;
import io.micronaut.http.annotation.Produces;
import io.micronaut.http.server.exceptions.ExceptionHandler;
import io.micronaut.http.server.exceptions.response.ErrorContext;
import io.micronaut.http.server.exceptions.response.ErrorResponseProcessor;
import jakarta.inject.Singleton;

/**
 * Handles the server response when an {@link AuthenticationException} is thrown.
 *
 * @author James Kleeh
 * @since 1.0
 */
@Requires(classes = ExceptionHandler.class)
@Singleton
@Primary
@Produces
public class AuthenticationExceptionHandler implements ExceptionHandler> {

    private final ErrorResponseProcessor errorResponseProcessor;

    public AuthenticationExceptionHandler(ErrorResponseProcessor errorResponseProcessor) {
        this.errorResponseProcessor = errorResponseProcessor;
    }

    @Override
    public MutableHttpResponse handle(HttpRequest request, AuthenticationException exception) {
        return errorResponseProcessor.processResponse(ErrorContext.builder(request)
            .cause(exception)
            .errorMessage(exception.getMessage())
            .build(), HttpResponse.status(HttpStatus.UNAUTHORIZED, exception.getMessage()));
    }
}