| /* |
| * 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.hdfs.web.oauth2; |
| |
| import com.squareup.okhttp.OkHttpClient; |
| import com.squareup.okhttp.Request; |
| import com.squareup.okhttp.RequestBody; |
| import com.squareup.okhttp.Response; |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hdfs.web.URLConnectionFactory; |
| import org.apache.hadoop.util.Timer; |
| import org.apache.http.HttpStatus; |
| import org.codehaus.jackson.map.ObjectMapper; |
| import org.codehaus.jackson.map.ObjectReader; |
| |
| import java.io.IOException; |
| import java.util.Map; |
| import java.util.concurrent.TimeUnit; |
| |
| import static org.apache.hadoop.hdfs.client.HdfsClientConfigKeys.OAUTH_CLIENT_ID_KEY; |
| import static org.apache.hadoop.hdfs.client.HdfsClientConfigKeys.OAUTH_REFRESH_URL_KEY; |
| import static org.apache.hadoop.hdfs.web.oauth2.OAuth2Constants.ACCESS_TOKEN; |
| import static org.apache.hadoop.hdfs.web.oauth2.OAuth2Constants.CLIENT_CREDENTIALS; |
| import static org.apache.hadoop.hdfs.web.oauth2.OAuth2Constants.CLIENT_ID; |
| import static org.apache.hadoop.hdfs.web.oauth2.OAuth2Constants.CLIENT_SECRET; |
| import static org.apache.hadoop.hdfs.web.oauth2.OAuth2Constants.EXPIRES_IN; |
| import static org.apache.hadoop.hdfs.web.oauth2.OAuth2Constants.GRANT_TYPE; |
| import static org.apache.hadoop.hdfs.web.oauth2.OAuth2Constants.URLENCODED; |
| import static org.apache.hadoop.hdfs.web.oauth2.Utils.notNull; |
| |
| /** |
| * Obtain an access token via the credential-based OAuth2 workflow. This |
| * abstract class requires only that implementations provide the credential, |
| * which the class then uses to obtain a refresh token. |
| */ |
| @InterfaceAudience.Public |
| @InterfaceStability.Evolving |
| public abstract class CredentialBasedAccessTokenProvider |
| extends AccessTokenProvider { |
| private static final ObjectReader READER = |
| new ObjectMapper().reader(Map.class); |
| |
| public static final String OAUTH_CREDENTIAL_KEY |
| = "dfs.webhdfs.oauth2.credential"; |
| |
| private AccessTokenTimer timer; |
| |
| private String clientId; |
| |
| private String refreshURL; |
| |
| private String accessToken; |
| |
| private boolean initialCredentialObtained = false; |
| |
| CredentialBasedAccessTokenProvider() { |
| this.timer = new AccessTokenTimer(); |
| } |
| |
| CredentialBasedAccessTokenProvider(Timer timer) { |
| this.timer = new AccessTokenTimer(timer); |
| } |
| |
| public abstract String getCredential(); |
| |
| @Override |
| public void setConf(Configuration conf) { |
| super.setConf(conf); |
| clientId = notNull(conf, OAUTH_CLIENT_ID_KEY); |
| refreshURL = notNull(conf, OAUTH_REFRESH_URL_KEY); |
| } |
| |
| @Override |
| public synchronized String getAccessToken() throws IOException { |
| if(timer.shouldRefresh() || !initialCredentialObtained) { |
| refresh(); |
| initialCredentialObtained = true; |
| } |
| |
| return accessToken; |
| } |
| |
| void refresh() throws IOException { |
| try { |
| OkHttpClient client = new OkHttpClient(); |
| client.setConnectTimeout(URLConnectionFactory.DEFAULT_SOCKET_TIMEOUT, |
| TimeUnit.MILLISECONDS); |
| client.setReadTimeout(URLConnectionFactory.DEFAULT_SOCKET_TIMEOUT, |
| TimeUnit.MILLISECONDS); |
| |
| String bodyString = Utils.postBody(CLIENT_SECRET, getCredential(), |
| GRANT_TYPE, CLIENT_CREDENTIALS, |
| CLIENT_ID, clientId); |
| |
| RequestBody body = RequestBody.create(URLENCODED, bodyString); |
| |
| Request request = new Request.Builder() |
| .url(refreshURL) |
| .post(body) |
| .build(); |
| Response responseBody = client.newCall(request).execute(); |
| |
| if (responseBody.code() != HttpStatus.SC_OK) { |
| throw new IllegalArgumentException("Received invalid http response: " |
| + responseBody.code() + ", text = " + responseBody.toString()); |
| } |
| |
| Map<?, ?> response = READER.readValue(responseBody.body().string()); |
| |
| String newExpiresIn = response.get(EXPIRES_IN).toString(); |
| timer.setExpiresIn(newExpiresIn); |
| |
| accessToken = response.get(ACCESS_TOKEN).toString(); |
| |
| } catch (Exception e) { |
| throw new IOException("Unable to obtain access token from credential", e); |
| } |
| } |
| } |