added CORS filter

openid-connect-server/src/main/java/org/mitre/oauth2/web/CorsFilter.java

@@ -0,0 +1,42 @@
+/**
+ * 
+ */
+package org.mitre.oauth2.web;
+
+import java.io.IOException;
+
+import javax.servlet.FilterChain;
+import javax.servlet.ServletException;
+import javax.servlet.ServletRequest;
+import javax.servlet.ServletResponse;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.springframework.stereotype.Component;
+import org.springframework.web.filter.GenericFilterBean;
+
+/**
+ * @author jricher
+ *
+ */
+@Component("corsFilter")
+public class CorsFilter extends GenericFilterBean {
+
+	/* (non-Javadoc)
+	 * @see javax.servlet.Filter#doFilter(javax.servlet.ServletRequest, javax.servlet.ServletResponse, javax.servlet.FilterChain)
+	 */
+	@Override
+	public void doFilter(ServletRequest req, ServletResponse resp, FilterChain filterChain) throws IOException, ServletException {
+		HttpServletRequest request = (HttpServletRequest)req;
+		HttpServletResponse response = (HttpServletResponse)resp;
+		
+		response.addHeader("Access-Control-Allow-Origin", "*");
+		if (request.getHeader("Access-Control-Request-Method") != null && "OPTIONS".equals(request.getMethod())) {
+			// CORS "pre-flight" request
+			response.addHeader("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE");
+			response.addHeader("Access-Control-Allow-Headers", "X-Requested-With,Origin,Content-Type, Accept, Authorization");
+		}
+		filterChain.doFilter(request, response);
+	}
+
+}

openid-connect-server/src/main/webapp/WEB-INF/application-context.xml

@@ -74,31 +74,37 @@
 		<!-- include this only if you need to authenticate clients via request parameters -->
 		<security:custom-filter ref="clientAssertiontokenEndpointFilter" after="PRE_AUTH_FILTER" /> <!-- this one has to go first -->
 		<security:custom-filter ref="clientCredentialsTokenEndpointFilter" before="BASIC_AUTH_FILTER" />
+		<security:custom-filter ref="corsFilter" after="SECURITY_CONTEXT_FILTER" />
 		<security:access-denied-handler ref="oauthAccessDeniedHandler" />
 	</security:http>
 
 	<!-- Allow open access to required endpoints -->
 	<security:http pattern="/jwk**" use-expressions="true" entry-point-ref="http403EntryPoint" create-session="stateless">
 		<security:intercept-url pattern="/jwk**" access="permitAll"/>
+		<security:custom-filter ref="corsFilter" after="SECURITY_CONTEXT_FILTER" />
 	</security:http>
 	<security:http pattern="/.well-known/**" use-expressions="true" entry-point-ref="http403EntryPoint" create-session="stateless">
 		<security:intercept-url pattern="/.well-known/**" access="permitAll"/>
+		<security:custom-filter ref="corsFilter" after="SECURITY_CONTEXT_FILTER" />
 	</security:http>
 
 	<!-- Allow open access to all static resources -->	
 	<security:http pattern="/resources/**" use-expressions="true" entry-point-ref="http403EntryPoint" create-session="stateless">
 		<security:intercept-url pattern="/resources/**" access="permitAll"/>
+		<security:custom-filter ref="corsFilter" after="SECURITY_CONTEXT_FILTER" />
 	</security:http>
 	
 	<!-- OAuth-protect API and other endpoints -->
 	<security:http pattern="/register/**" use-expressions="true" entry-point-ref="oauthAuthenticationEntryPoint" create-session="stateless">
 		<security:custom-filter ref="resourceServerFilter" before="PRE_AUTH_FILTER" />
+		<security:custom-filter ref="corsFilter" after="SECURITY_CONTEXT_FILTER" />
 		<security:expression-handler ref="oauthWebExpressionHandler" />
 		<security:intercept-url pattern="/register/**" access="permitAll"/>
 	</security:http>
 
  	<security:http pattern="/userinfo**" use-expressions="true" entry-point-ref="oauthAuthenticationEntryPoint" create-session="stateless">
 		<security:custom-filter ref="resourceServerFilter" before="PRE_AUTH_FILTER" />
+		<security:custom-filter ref="corsFilter" after="SECURITY_CONTEXT_FILTER" />
 		<security:expression-handler ref="oauthWebExpressionHandler" />
 	</security:http>
 
@@ -114,6 +120,7 @@
 			authentication-manager-ref="clientAuthenticationManager">
 		<security:http-basic entry-point-ref="oauthAuthenticationEntryPoint" />
 <!-- 		<security:custom-filter ref="resourceServerFilter" before="PRE_AUTH_FILTER" /> -->
+		<security:custom-filter ref="corsFilter" after="SECURITY_CONTEXT_FILTER" />
 		<security:custom-filter ref="clientCredentialsIntrospectionEndpointFilter" before="BASIC_AUTH_FILTER" />
 	</security:http>
 
@@ -124,6 +131,7 @@
 			authentication-manager-ref="clientAuthenticationManager">
 		<security:http-basic entry-point-ref="oauthAuthenticationEntryPoint" />
 <!-- 		<security:custom-filter ref="resourceServerFilter" before="PRE_AUTH_FILTER" /> -->
+		<security:custom-filter ref="corsFilter" after="SECURITY_CONTEXT_FILTER" />
 		<security:custom-filter ref="clientCredentialsRevocationEndpointFilter" before="BASIC_AUTH_FILTER" />
 	</security:http>