software.amazon.awssdk.services.s3.internal.s3express.UseS3ExpressAuthResolver Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of s3 Show documentation

The AWS Java SDK for Amazon S3 module holds the client classes that are used for communicating with Amazon Simple Storage Service

There is a newer version: 2.30.1

Show newest version

/*
 * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 *  http://aws.amazon.com/apache2.0
 *
 * or in the "license" file accompanying this file. This file 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 software.amazon.awssdk.services.s3.internal.s3express;

import java.util.function.Supplier;
import software.amazon.awssdk.annotations.SdkInternalApi;
import software.amazon.awssdk.core.SdkSystemSetting;
import software.amazon.awssdk.core.client.config.SdkClientConfiguration;
import software.amazon.awssdk.core.client.config.SdkClientOption;
import software.amazon.awssdk.profiles.ProfileFile;
import software.amazon.awssdk.profiles.ProfileProperty;
import software.amazon.awssdk.utils.Lazy;
import software.amazon.awssdk.utils.Logger;

/**
 * Resolve the use S3Express auth setting for S3.
 */
@SdkInternalApi
public final class UseS3ExpressAuthResolver {
    private static final Logger LOG = Logger.loggerFor(UseS3ExpressAuthResolver.class);
    private static final String DEFAULT_SETTING = "false";
    private final Lazy useS3ExpressAuth;

    public UseS3ExpressAuthResolver(SdkClientConfiguration config) {
        this.useS3ExpressAuth =
            new Lazy<>(() -> useS3ExpressAuth(() -> config.option(SdkClientOption.PROFILE_FILE),
                                              () -> config.option(SdkClientOption.PROFILE_NAME)));
    }

    public boolean resolve() {
        return useS3ExpressAuth.getValue();
    }

    private boolean useS3ExpressAuth(Supplier profileFile, Supplier profileName) {

        String env = envVarSetting();

        if (env != null) {
            return DEFAULT_SETTING.equalsIgnoreCase(env);
        }

        String profile = profileFileSetting(profileFile, profileName);

        if (profile != null) {
            return DEFAULT_SETTING.equalsIgnoreCase(profile);
        }

        return true;
    }


    private static String envVarSetting() {
        return SdkSystemSetting.AWS_S3_DISABLE_EXPRESS_SESSION_AUTH.getStringValue().orElse(null);
    }

    private String profileFileSetting(Supplier profileFileSupplier, Supplier profileNameSupplier) {
        try {
            ProfileFile profileFile = profileFileSupplier.get();
            String profileName = profileNameSupplier.get();
            if (profileFile == null || profileName == null) {
                return null;
            }
            return profileFile.profile(profileName)
                              .flatMap(p -> p.property(ProfileProperty.DISABLE_S3_EXPRESS_AUTH))
                              .orElse(null);
        } catch (Exception t) {
            LOG.warn(() -> "Unable to load config file", t);
            return null;
        }
    }

}