1 /*
2 * Copyright 2013-2014 the original author or authors.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
5 * the License. You may obtain a copy of the License at
6 *
7 * https://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
10 * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
11 * specific language governing permissions and limitations under the License.
12 */
13
14 package org.springframework.security.oauth2.provider.authentication;
15
16 import javax.servlet.http.HttpServletRequest;
17
18 import org.springframework.security.core.Authentication;
19
20 /**
21 * @author Dave Syer
22 *
23 */
24 public interface TokenExtractor {
25
26 /**
27 * Extract a token value from an incoming request without authentication.
28 *
29 * @param request the current ServletRequest
30 * @return an authentication token whose principal is an access token (or null if there is none)
31 */
32 Authentication extract(HttpServletRequest request);
33
34 }