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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.aliyun.odps.account;

import com.aliyun.odps.commons.transport.Headers;
import com.aliyun.odps.commons.transport.Request;
import com.aliyun.odps.utils.StringUtils;

public class StsRequestSigner extends AliyunRequestSigner {

  private String stsToken;

  public StsRequestSigner(String accessId, String accessKey, String stsToken) {
    this(accessId, accessKey, stsToken, null);
  }

  public StsRequestSigner(String accessId, String accessKey, String stsToken, String region) {
    super(accessId, accessKey, region);
    this.stsToken = stsToken;
  }

  @Override
  public void sign(String resource, Request req) {
    super.sign(resource, req);
    if (!StringUtils.isNullOrEmpty(stsToken)) {
      req.getHeaders().put(Headers.AUTHORIZATION_STS_TOKEN, stsToken);
    }
  }
}