75 lines
2.3 KiB
Java
75 lines
2.3 KiB
Java
/*
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* Copyright 2020 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package sample;
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import static org.springframework.http.HttpMethod.GET;
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import static org.springframework.http.MediaType.APPLICATION_JSON_VALUE;
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import java.io.IOException;
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import java.io.Writer;
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import javax.servlet.FilterChain;
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import javax.servlet.ServletException;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import org.springframework.security.web.util.matcher.AntPathRequestMatcher;
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import org.springframework.security.web.util.matcher.RequestMatcher;
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import org.springframework.util.Assert;
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import org.springframework.web.filter.OncePerRequestFilter;
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import org.springframework.web.util.UrlPathHelper;
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import com.nimbusds.jose.jwk.JWKSet;
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public class JwkSetEndpointFilter extends OncePerRequestFilter {
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static final String WELL_KNOWN_JWK_URIS = "/.well-known/jwk_uris";
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private final RequestMatcher requestMatcher = new AntPathRequestMatcher(WELL_KNOWN_JWK_URIS, GET.name(), true,
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new UrlPathHelper());
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private final JWKSet jwkSet;
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public JwkSetEndpointFilter(JWKSet jwkSet) {
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Assert.notNull(jwkSet, "jwkSet cannot be null");
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this.jwkSet = jwkSet;
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}
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@Override
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protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
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throws ServletException, IOException {
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if (ifRequestMatches(request)) {
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respond(response);
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} else {
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filterChain.doFilter(request, response);
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}
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}
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private void respond(HttpServletResponse response) throws IOException {
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response.setContentType(APPLICATION_JSON_VALUE);
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try (Writer writer = response.getWriter()) {
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writer.write(jwkSet.toPublicJWKSet().toJSONObject().toJSONString());
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}
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}
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private boolean ifRequestMatches(HttpServletRequest request) {
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return this.requestMatcher.matches(request);
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}
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}
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