Merge branch 'container-sas-url' into 'master'

Container sas url

See merge request !50

pom.xml

@@ -20,7 +20,7 @@
   <groupId>org.opengroup.osdu</groupId>
   <artifactId>core-lib-azure</artifactId>
   <packaging>jar</packaging>
-  <version>0.0.45</version>
+  <version>0.0.46</version>
   <name>core-lib-azure</name>
 
   <properties>

src/main/java/org/opengroup/osdu/azure/blobstorage/BlobStore.java

@@ -20,6 +20,7 @@ import com.azure.storage.blob.BlobServiceClient;
 import com.azure.storage.blob.models.BlobCopyInfo;
 import com.azure.storage.blob.models.BlobErrorCode;
 import com.azure.storage.blob.models.BlobStorageException;
+import com.azure.storage.blob.sas.BlobContainerSasPermission;
 import com.azure.storage.blob.sas.BlobSasPermission;
 import com.azure.storage.blob.sas.BlobServiceSasSignatureValues;
 import com.azure.storage.blob.specialized.BlockBlobClient;
@@ -195,6 +196,19 @@ public class BlobStore {
         return blockBlobClient.getBlobUrl() + "?" + generateSASToken(blockBlobClient, expiryTime, permissions);
     }
 
+    /**
+     * Generates pre-signed url to a blob container.
+     * @param dataPartitionId data partition id
+     * @param containerName Name of the storage container
+     * @param expiryTime Time after which the token expires
+     * @param permissions permissions for the given container
+     * @return Generates pre-signed url for a given container
+     */
+    public String generatePreSignedURL(final String dataPartitionId, final String containerName, final OffsetDateTime expiryTime, final BlobContainerSasPermission permissions) {
+        BlobContainerClient blobContainerClient = getBlobContainerClient(dataPartitionId, containerName);
+        return blobContainerClient.getBlobContainerUrl() + "?" + generateSASToken(blobContainerClient, expiryTime, permissions);
+    }
+
     /**
      * Method is used to copy a file specified at Source URL to the provided destination.
      * @param dataPartitionId Data partition id
@@ -223,6 +237,17 @@ public class BlobStore {
         return blockBlobClient.generateSas(blobServiceSasSignatureValues);
     }
 
+    /**
+     * @param client Container client
+     * @param expiryTime Time after which SAS Token expires
+     * @param permissions Permissions for the given container
+     * @return Generates SAS Token.
+     */
+    private String generateSASToken(final BlobContainerClient client, final OffsetDateTime expiryTime, final BlobContainerSasPermission permissions) {
+        BlobServiceSasSignatureValues blobServiceSasSignatureValues = new BlobServiceSasSignatureValues(expiryTime, permissions);
+        return client.generateSas(blobServiceSasSignatureValues);
+    }
+
     /**
      * @param dataPartitionId Data partition id.
      * @param containerName   Name of storage container.