grails.plugin.springsecurity.rest.token.bearer.BearerTokenAuthenticationEntryPoint.groovy Maven / Gradle / Ivy

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/* Copyright 2024 the original author or 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
 *
 *      http://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 grails.plugin.springsecurity.rest.token.bearer

import grails.plugin.springsecurity.rest.token.AccessToken
import groovy.transform.CompileStatic
import groovy.util.logging.Slf4j
import org.springframework.security.core.AuthenticationException
import org.springframework.security.web.AuthenticationEntryPoint

import javax.servlet.ServletException
import javax.servlet.http.HttpServletRequest
import javax.servlet.http.HttpServletResponse

/**
 * Handles prompting the client for authentication when using bearer tokens.
 */
@Slf4j
@CompileStatic
class BearerTokenAuthenticationEntryPoint implements AuthenticationEntryPoint {

    BearerTokenReader tokenReader

    @Override
    void commence(HttpServletRequest request, HttpServletResponse response, AuthenticationException authException)
            throws IOException, ServletException {
        AccessToken accessToken = tokenReader.findToken(request)

        if (accessToken) {
            response.addHeader('WWW-Authenticate', 'Bearer error="invalid_token"')
        } else {
            response.addHeader('WWW-Authenticate', 'Bearer')
        }
        response.sendError(HttpServletResponse.SC_UNAUTHORIZED)

    }
}