com.epam.dlab.auth.rest.UserSessionDurationAuthorizer.java Source code

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Here is the source code for com.epam.dlab.auth.rest.UserSessionDurationAuthorizer.java

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/*
 * Copyright (c) 2017, EPAM SYSTEMS INC
 *
 * 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.
 */

package com.epam.dlab.auth.rest;

import com.epam.dlab.auth.UserInfo;
import io.dropwizard.auth.Authorizer;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;

import java.util.Date;

@Slf4j
public final class UserSessionDurationAuthorizer implements Authorizer<UserInfo> {
    public static final String SHORT_USER_SESSION_DURATION = "SHORT_USER_SESSION";
    private final long maxSessionDurabilityMilliseconds;
    private UserSessionDurationCallback callback;

    public UserSessionDurationAuthorizer(UserSessionDurationCallback callback,
            long maxSessionDurabilityMilliseconds) {
        this.callback = callback;
        this.maxSessionDurabilityMilliseconds = maxSessionDurabilityMilliseconds;
    }

    @Override
    public boolean authorize(UserInfo principal, String role) {
        if (SHORT_USER_SESSION_DURATION.equalsIgnoreCase(role)) {
            try {
                String refreshToken = principal.getKeys().get("refresh_token");
                String createdDateOfRefreshToken = principal.getKeys().get("created_date_of_refresh_token");

                if (StringUtils.isEmpty(refreshToken)) {
                    log.info("Refresh token is empty for user {}", principal.getName());
                    return false;
                }

                if (StringUtils.isEmpty(createdDateOfRefreshToken)) {
                    log.info("Created date for refresh token is empty for user {}", principal.getName());
                    return false;
                }

                log.debug("refresh token requested {} and current date is {}",
                        new Date(Long.valueOf(createdDateOfRefreshToken)), new Date());

                long passedTime = System.currentTimeMillis() - Long.valueOf(createdDateOfRefreshToken);

                log.info("Passed time of session for user {} is {} milliseconds", principal.getName(), passedTime);
                if (passedTime > maxSessionDurabilityMilliseconds) {

                    silentCallbackExecution(principal);

                    log.info("Re-login required for user {}", principal.getName());
                    return false;
                }

                return true;
            } catch (RuntimeException e) {
                log.error("Cannot verify durability of session for user {}", principal.getName(), e);
                return false;
            }

        }

        return true;
    }

    private void silentCallbackExecution(UserInfo principal) {
        log.info("Log out expired user {}", principal.getName());
        try {
            callback.onSessionExpired(principal);
        } catch (RuntimeException e) {
            log.warn("Error during logout user {}", principal.getName(), e);
        }
    }
}