org.trustedanalytics.cloud.cc.api.loggers.ScramblingSlf4jLogger Maven / Gradle / Ivy

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/**
 * Copyright (c) 2015 Intel Corporation
 *
 * 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 org.trustedanalytics.cloud.cc.api.loggers;

import feign.slf4j.Slf4jLogger;

import java.util.ArrayList;
import java.util.List;
import java.util.function.Consumer;

/**
 * Obfuscates or removes sensitive data during logging
 */
public class ScramblingSlf4jLogger extends Slf4jLogger {

    private static final String SCRAMBLE_STRING = "[PRIVATE DATA HIDDEN]";
    private final List> scramblers = new ArrayList<>();

    public ScramblingSlf4jLogger(Class clazz) {
        super(clazz);

        scramblers.add(authorizationScrambler());
    }

    @Override
    protected void log(String configKey, String format, Object... args) {
        scramblers.forEach(scrambler -> scrambler.accept(args));
        super.log(configKey, format, args);
    }
    
    private Consumer authorizationScrambler() {
        return args -> {
            // is header
            if ((args != null) && (args.length == 2) && ("Authorization".equalsIgnoreCase(args[0].toString()))) {
                args[1] = SCRAMBLE_STRING;
            }
        };
    }


}