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Rapidoid HTTP Fast
There is a newer version: 5.5.5
/*-
 * #%L
 * rapidoid-http-fast
 * %%
 * Copyright (C) 2014 - 2017 Nikolche Mihajlovski and contributors
 * %%
 * 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.
 * #L%
 */

package org.rapidoid.http.handler;

import org.rapidoid.RapidoidThing;
import org.rapidoid.annotation.Authors;
import org.rapidoid.annotation.Since;
import org.rapidoid.ctx.Ctx;
import org.rapidoid.ctx.Ctxs;
import org.rapidoid.ctx.UserInfo;
import org.rapidoid.http.HttpUtils;
import org.rapidoid.http.HttpWrapper;
import org.rapidoid.http.Req;
import org.rapidoid.http.customize.Customization;
import org.rapidoid.security.Secure;
import org.rapidoid.u.U;
import org.rapidoid.util.TokenAuthData;

import java.util.Collections;
import java.util.Set;

@Authors("Nikolche Mihajlovski")
@Since("5.5.1")
public class HttpAuthWrapper extends RapidoidThing implements HttpWrapper {

	private final Set requiredRoles;

	public HttpAuthWrapper(Set requiredRoles) {
		this.requiredRoles = requiredRoles;
	}

	@Override
	public Object wrap(final Req req, final HandlerInvocation invocation) throws Exception {
		TokenAuthData auth = HttpUtils.getAuth(req);

		String username = auth != null ? auth.user : null;

		if (U.isEmpty(username)) {
			HttpUtils.clearUserData(req);
		}

		Set roles = userRoles(req, username);
		Set scope = auth != null ? auth.scope : null;

		if (U.notEmpty(requiredRoles) && !Secure.hasAnyRole(username, roles, requiredRoles)) {
			throw new SecurityException("The user doesn't have the required roles!");
		}

		Ctx ctx = Ctxs.required();
		ctx.setUser(new UserInfo(username, roles, scope));

		return invocation.invoke();
	}

	private Set userRoles(Req req, String username) {
		if (username != null) {
			try {
				return Customization.of(req).rolesProvider().getRolesForUser(req, username);
			} catch (Exception e) {
				throw U.rte(e);
			}
		} else {
			return Collections.emptySet();
		}
	}

}