S3Credentials.java
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上传日期:2018-01-08
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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 org.apache.hadoop.fs.s3;
- import java.net.URI;
- import org.apache.hadoop.conf.Configuration;
- /**
- * <p>
- * Extracts AWS credentials from the filesystem URI or configuration.
- * </p>
- */
- public class S3Credentials {
-
- private String accessKey;
- private String secretAccessKey;
- /**
- * @throws IllegalArgumentException if credentials for S3 cannot be
- * determined.
- */
- public void initialize(URI uri, Configuration conf) {
- if (uri.getHost() == null) {
- throw new IllegalArgumentException("Invalid hostname in URI " + uri);
- }
-
- String userInfo = uri.getUserInfo();
- if (userInfo != null) {
- int index = userInfo.indexOf(':');
- if (index != -1) {
- accessKey = userInfo.substring(0, index);
- secretAccessKey = userInfo.substring(index + 1);
- } else {
- accessKey = userInfo;
- }
- }
-
- String scheme = uri.getScheme();
- String accessKeyProperty = String.format("fs.%s.awsAccessKeyId", scheme);
- String secretAccessKeyProperty =
- String.format("fs.%s.awsSecretAccessKey", scheme);
- if (accessKey == null) {
- accessKey = conf.get(accessKeyProperty);
- }
- if (secretAccessKey == null) {
- secretAccessKey = conf.get(secretAccessKeyProperty);
- }
- if (accessKey == null && secretAccessKey == null) {
- throw new IllegalArgumentException("AWS " +
- "Access Key ID and Secret Access " +
- "Key must be specified as the " +
- "username or password " +
- "(respectively) of a " + scheme +
- " URL, or by setting the " +
- accessKeyProperty + " or " +
- secretAccessKeyProperty +
- " properties (respectively).");
- } else if (accessKey == null) {
- throw new IllegalArgumentException("AWS " +
- "Access Key ID must be specified " +
- "as the username of a " + scheme +
- " URL, or by setting the " +
- accessKeyProperty + " property.");
- } else if (secretAccessKey == null) {
- throw new IllegalArgumentException("AWS " +
- "Secret Access Key must be " +
- "specified as the password of a " +
- scheme + " URL, or by setting the " +
- secretAccessKeyProperty +
- " property.");
- }
- }
-
- public String getAccessKey() {
- return accessKey;
- }
-
- public String getSecretAccessKey() {
- return secretAccessKey;
- }
- }