/**
    * Licensed to jclouds, Inc. (jclouds) under one or more
    * contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  jclouds 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.jclouds.azure.storage.util;
  
  import java.io.InputStream;
  
  import javax.inject.Inject;
  import javax.inject.Provider;
  
  import org.jclouds.azure.storage.domain.AzureStorageError;
  import org.jclouds.azure.storage.filters.SharedKeyLiteAuthentication;
  import org.jclouds.azure.storage.reference.AzureStorageHeaders;
  import org.jclouds.azure.storage.xml.ErrorHandler;
  import org.jclouds.http.HttpCommand;
  import org.jclouds.http.HttpException;
  import org.jclouds.http.HttpResponse;
  import org.jclouds.http.functions.ParseSax;
  
  /**
   * Encryption, Hashing, and IO Utilities needed to sign and verify Azure Storage requests and
   * responses.
   * 
   * @author Adrian Cole
   */
  public class AzureStorageUtils {
  
     @Inject
     SharedKeyLiteAuthentication signer;
  
     @Inject
     ParseSax.Factory factory;
  
     @Inject
     Provider<ErrorHandler> errorHandlerProvider;
  
     public AzureStorageError parseAzureStorageErrorFromContent(HttpCommand command,
              HttpResponse response, InputStream content) throws HttpException {
        AzureStorageError error = factory.create(errorHandlerProvider.get()).parse(content);
        error.setRequestId(response.getFirstHeaderOrNull(AzureStorageHeaders.REQUEST_ID));
        if ("AuthenticationFailed".equals(error.getCode())) {
           error.setStringSigned(signer.createStringToSign(command.getCurrentRequest()));
           error.setSignature(signer.signString(error.getStringSigned()));
        }
        return error;
     }
  
  }