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Module for providing OAuth2 support to Spring Security
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/*
 * Copyright 2009-2019 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
 *
 *      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 org.springframework.security.oauth2.provider.endpoint;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.http.ResponseEntity;
import org.springframework.security.oauth2.common.OAuth2AccessToken;
import org.springframework.security.oauth2.common.exceptions.InvalidTokenException;
import org.springframework.security.oauth2.common.exceptions.OAuth2Exception;
import org.springframework.security.oauth2.provider.OAuth2Authentication;
import org.springframework.security.oauth2.provider.error.DefaultWebResponseExceptionTranslator;
import org.springframework.security.oauth2.provider.error.WebResponseExceptionTranslator;
import org.springframework.security.oauth2.provider.token.AccessTokenConverter;
import org.springframework.security.oauth2.provider.token.DefaultAccessTokenConverter;
import org.springframework.security.oauth2.provider.token.ResourceServerTokenServices;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.Map;

/**
 * Controller which decodes access tokens for clients who are not able to do so (or where opaque token values are used).
 *
 * 
 * @deprecated See the OAuth 2.0 Migration Guide for Spring Security 5.
 *
 * @author Luke Taylor
 * @author Joel D'sa
 */
@FrameworkEndpoint
@Deprecated
public class CheckTokenEndpoint {

	private ResourceServerTokenServices resourceServerTokenServices;

	private AccessTokenConverter accessTokenConverter = new DefaultAccessTokenConverter();

	protected final Log logger = LogFactory.getLog(getClass());

	private WebResponseExceptionTranslator exceptionTranslator = new DefaultWebResponseExceptionTranslator();

	public CheckTokenEndpoint(ResourceServerTokenServices resourceServerTokenServices) {
		this.resourceServerTokenServices = resourceServerTokenServices;
	}
	
	/**
	 * @param exceptionTranslator the exception translator to set
	 */
	public void setExceptionTranslator(WebResponseExceptionTranslator exceptionTranslator) {
		this.exceptionTranslator = exceptionTranslator;
	}

	/**
	 * @param accessTokenConverter the accessTokenConverter to set
	 */
	public void setAccessTokenConverter(AccessTokenConverter accessTokenConverter) {
		this.accessTokenConverter = accessTokenConverter;
	}

	@RequestMapping(value = "/oauth/check_token", method = RequestMethod.POST)
	@ResponseBody
	public Map checkToken(@RequestParam("token") String value) {

		OAuth2AccessToken token = resourceServerTokenServices.readAccessToken(value);
		if (token == null) {
			throw new InvalidTokenException("Token was not recognised");
		}

		if (token.isExpired()) {
			throw new InvalidTokenException("Token has expired");
		}

		OAuth2Authentication authentication = resourceServerTokenServices.loadAuthentication(token.getValue());

		Map response = (Map)accessTokenConverter.convertAccessToken(token, authentication);

		// gh-1070
		response.put("active", true);	// Always true if token exists and not expired

		return response;
	}

	@ExceptionHandler(InvalidTokenException.class)
	public ResponseEntity handleException(Exception e) throws Exception {
		logger.info("Handling error: " + e.getClass().getSimpleName() + ", " + e.getMessage());
		// This isn't an oauth resource, so we don't want to send an
		// unauthorized code here. The client has already authenticated
		// successfully with basic auth and should just
		// get back the invalid token error.
		@SuppressWarnings("serial")
		InvalidTokenException e400 = new InvalidTokenException(e.getMessage()) {
			@Override
			public int getHttpErrorCode() {
				return 400;
			}
		};
		return exceptionTranslator.translate(e400);
	}

}