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// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License.
package com.azure.storage.blob;
import com.azure.core.annotation.ServiceClientBuilder;
import com.azure.core.client.traits.AzureNamedKeyCredentialTrait;
import com.azure.core.client.traits.AzureSasCredentialTrait;
import com.azure.core.client.traits.ConfigurationTrait;
import com.azure.core.client.traits.ConnectionStringTrait;
import com.azure.core.client.traits.EndpointTrait;
import com.azure.core.client.traits.HttpTrait;
import com.azure.core.client.traits.TokenCredentialTrait;
import com.azure.core.credential.AzureNamedKeyCredential;
import com.azure.core.credential.AzureSasCredential;
import com.azure.core.credential.TokenCredential;
import com.azure.core.http.HttpClient;
import com.azure.core.http.HttpPipeline;
import com.azure.core.http.HttpPipelinePosition;
import com.azure.core.http.policy.HttpLogDetailLevel;
import com.azure.core.http.policy.HttpLogOptions;
import com.azure.core.http.policy.HttpPipelinePolicy;
import com.azure.core.http.policy.RetryOptions;
import com.azure.core.util.ClientOptions;
import com.azure.core.util.Configuration;
import com.azure.core.util.CoreUtils;
import com.azure.core.util.HttpClientOptions;
import com.azure.core.util.logging.ClientLogger;
import com.azure.storage.blob.implementation.models.EncryptionScope;
import com.azure.storage.blob.implementation.util.BuilderHelper;
import com.azure.storage.blob.models.BlobAudience;
import com.azure.storage.blob.models.CpkInfo;
import com.azure.storage.blob.models.CustomerProvidedKey;
import com.azure.storage.common.StorageSharedKeyCredential;
import com.azure.storage.common.Utility;
import com.azure.storage.common.implementation.connectionstring.StorageAuthenticationSettings;
import com.azure.storage.common.implementation.connectionstring.StorageConnectionString;
import com.azure.storage.common.implementation.connectionstring.StorageEndpoint;
import com.azure.storage.common.policy.RequestRetryOptions;
import java.io.OutputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import java.util.Objects;
/**
* This class provides a fluent builder API to help aid the configuration and instantiation of {@link BlobClient
* BlobClients} and {@link BlobAsyncClient BlobAsyncClients}, call {@link #buildClient() buildClient} and {@link
* #buildAsyncClient() buildAsyncClient} respectively to construct an instance of the desired client.
*
*
* The following information must be provided on this builder:
*
*
* - the endpoint through {@code .endpoint()}, including the container name and blob name, in the format of
* {@code https://{accountName}.blob.core.windows.net/{containerName}/{blobName}}.
*
- the credential through {@code .credential()} or {@code .connectionString()} if the container is not publicly
* accessible.
*
*/
@ServiceClientBuilder(serviceClients = {BlobClient.class, BlobAsyncClient.class})
public final class BlobClientBuilder implements
TokenCredentialTrait,
ConnectionStringTrait,
AzureNamedKeyCredentialTrait,
AzureSasCredentialTrait,
HttpTrait,
ConfigurationTrait,
EndpointTrait {
private static final ClientLogger LOGGER = new ClientLogger(BlobClientBuilder.class);
private String endpoint;
private String accountName;
private String containerName;
private String blobName;
private String snapshot;
private String versionId;
private CpkInfo customerProvidedKey;
private EncryptionScope encryptionScope;
private StorageSharedKeyCredential storageSharedKeyCredential;
private TokenCredential tokenCredential;
private AzureSasCredential azureSasCredential;
private String sasToken;
private HttpClient httpClient;
private final List perCallPolicies = new ArrayList<>();
private final List perRetryPolicies = new ArrayList<>();
private HttpLogOptions logOptions;
private RetryOptions coreRetryOptions;
private RequestRetryOptions retryOptions;
private HttpPipeline httpPipeline;
private ClientOptions clientOptions = new ClientOptions();
private Configuration configuration;
private BlobServiceVersion version;
private BlobAudience audience;
/**
* Creates a builder instance that is able to configure and construct {@link BlobClient BlobClients} and {@link
* BlobAsyncClient BlobAsyncClients}.
*/
public BlobClientBuilder() {
logOptions = getDefaultHttpLogOptions();
}
/**
* Creates a {@link BlobClient} based on options set in the builder. BlobClients are used to perform generic blob
* methods such as {@link BlobClient#download(OutputStream) download} and {@link BlobClient#getProperties() get
* properties}, use this when the blob type is unknown.
*
* Code Samples
*
*
*
* BlobClient client = new BlobClientBuilder()
* .connectionString(connectionString)
* .buildClient();
*
*
*
* @return a {@link BlobClient} created from the configurations in this builder.
* @throws NullPointerException If {@code endpoint} or {@code blobName} is {@code null}.
* @throws IllegalStateException If multiple credentials have been specified.
* @throws IllegalStateException If both {@link #retryOptions(RetryOptions)}
* and {@link #retryOptions(RequestRetryOptions)} have been set.
*/
public BlobClient buildClient() {
return new BlobClient(buildAsyncClient());
}
/**
* Creates a {@link BlobAsyncClient} based on options set in the builder. BlobAsyncClients are used to perform
* generic blob methods such as {@link BlobAsyncClient#download() download} and {@link
* BlobAsyncClient#getProperties()}, use this when the blob type is unknown.
*
* Code Samples
*
*
*
* BlobAsyncClient client = new BlobClientBuilder()
* .connectionString(connectionString)
* .buildAsyncClient();
*
*
*
* @return a {@link BlobAsyncClient} created from the configurations in this builder.
* @throws NullPointerException If {@code endpoint} or {@code blobName} is {@code null}.
* @throws IllegalStateException If multiple credentials have been specified.
* @throws IllegalStateException If both {@link #retryOptions(RetryOptions)}
* and {@link #retryOptions(RequestRetryOptions)} have been set.
*/
public BlobAsyncClient buildAsyncClient() {
Objects.requireNonNull(blobName, "'blobName' cannot be null.");
Objects.requireNonNull(endpoint, "'endpoint' cannot be null");
BuilderHelper.httpsValidation(customerProvidedKey, "customer provided key", endpoint, LOGGER);
if (Objects.nonNull(customerProvidedKey) && Objects.nonNull(encryptionScope)) {
throw LOGGER.logExceptionAsError(new IllegalArgumentException("Customer provided key and encryption "
+ "scope cannot both be set"));
}
/*
Implicit and explicit root container access are functionally equivalent, but explicit references are easier
to read and debug.
*/
String blobContainerName = CoreUtils.isNullOrEmpty(containerName) ? BlobContainerAsyncClient.ROOT_CONTAINER_NAME
: containerName;
BlobServiceVersion serviceVersion = version != null ? version : BlobServiceVersion.getLatest();
HttpPipeline pipeline = (httpPipeline != null) ? httpPipeline : BuilderHelper.buildPipeline(
storageSharedKeyCredential, tokenCredential, azureSasCredential, sasToken,
endpoint, retryOptions, coreRetryOptions, logOptions,
clientOptions, httpClient, perCallPolicies, perRetryPolicies, configuration, audience, LOGGER);
return new BlobAsyncClient(pipeline, endpoint, serviceVersion, accountName, blobContainerName, blobName,
snapshot, customerProvidedKey, encryptionScope, versionId);
}
/**
* Sets the {@link CustomerProvidedKey customer provided key} that is used to encrypt blob contents on the server.
*
* @param customerProvidedKey {@link CustomerProvidedKey}
* @return the updated BlobClientBuilder object
*/
public BlobClientBuilder customerProvidedKey(CustomerProvidedKey customerProvidedKey) {
if (customerProvidedKey == null) {
this.customerProvidedKey = null;
} else {
this.customerProvidedKey = new CpkInfo()
.setEncryptionKey(customerProvidedKey.getKey())
.setEncryptionKeySha256(customerProvidedKey.getKeySha256())
.setEncryptionAlgorithm(customerProvidedKey.getEncryptionAlgorithm());
}
return this;
}
/**
* Sets the {@code encryption scope} that is used to encrypt blob contents on the server.
*
* @param encryptionScope Encryption scope containing the encryption key information.
* @return the updated BlobClientBuilder object
*/
public BlobClientBuilder encryptionScope(String encryptionScope) {
if (encryptionScope == null) {
this.encryptionScope = null;
} else {
this.encryptionScope = new EncryptionScope().setEncryptionScope(encryptionScope);
}
return this;
}
/**
* Sets the {@link StorageSharedKeyCredential} used to authorize requests sent to the service.
*
* @param credential {@link StorageSharedKeyCredential}.
* @return the updated BlobClientBuilder
* @throws NullPointerException If {@code credential} is {@code null}.
*/
public BlobClientBuilder credential(StorageSharedKeyCredential credential) {
this.storageSharedKeyCredential = Objects.requireNonNull(credential, "'credential' cannot be null.");
this.tokenCredential = null;
this.sasToken = null;
return this;
}
/**
* Sets the {@link AzureNamedKeyCredential} used to authorize requests sent to the service.
*
* @param credential {@link AzureNamedKeyCredential}.
* @return the updated BlobClientBuilder
* @throws NullPointerException If {@code credential} is {@code null}.
*/
@Override
public BlobClientBuilder credential(AzureNamedKeyCredential credential) {
Objects.requireNonNull(credential, "'credential' cannot be null.");
return credential(StorageSharedKeyCredential.fromAzureNamedKeyCredential(credential));
}
/**
* Sets the {@link TokenCredential} used to authorize requests sent to the service. Refer to the Azure SDK for Java
* identity and authentication
* documentation for more details on proper usage of the {@link TokenCredential} type.
*
* @param credential {@link TokenCredential} used to authorize requests sent to the service.
* @return the updated BlobClientBuilder
* @throws NullPointerException If {@code credential} is {@code null}.
*/
@Override
public BlobClientBuilder credential(TokenCredential credential) {
this.tokenCredential = Objects.requireNonNull(credential, "'credential' cannot be null.");
this.storageSharedKeyCredential = null;
this.sasToken = null;
return this;
}
/**
* Sets the SAS token used to authorize requests sent to the service.
*
* @param sasToken The SAS token to use for authenticating requests. This string should only be the query parameters
* (with or without a leading '?') and not a full url.
* @return the updated BlobClientBuilder
* @throws NullPointerException If {@code sasToken} is {@code null}.
*/
public BlobClientBuilder sasToken(String sasToken) {
this.sasToken = Objects.requireNonNull(sasToken,
"'sasToken' cannot be null.");
this.storageSharedKeyCredential = null;
this.tokenCredential = null;
return this;
}
/**
* Sets the {@link AzureSasCredential} used to authorize requests sent to the service.
*
* @param credential {@link AzureSasCredential} used to authorize requests sent to the service.
* @return the updated BlobClientBuilder
* @throws NullPointerException If {@code credential} is {@code null}.
*/
@Override
public BlobClientBuilder credential(AzureSasCredential credential) {
this.azureSasCredential = Objects.requireNonNull(credential,
"'credential' cannot be null.");
return this;
}
/**
* Clears the credential used to authorize the request.
*
* This is for blobs that are publicly accessible.
*
* @return the updated BlobClientBuilder
*/
public BlobClientBuilder setAnonymousAccess() {
this.storageSharedKeyCredential = null;
this.tokenCredential = null;
this.azureSasCredential = null;
this.sasToken = null;
return this;
}
/**
* Sets the connection string to connect to the service.
*
* @param connectionString Connection string of the storage account.
* @return the updated BlobClientBuilder
* @throws IllegalArgumentException If {@code connectionString} in invalid.
*/
@Override
public BlobClientBuilder connectionString(String connectionString) {
StorageConnectionString storageConnectionString
= StorageConnectionString.create(connectionString, LOGGER);
StorageEndpoint endpoint = storageConnectionString.getBlobEndpoint();
if (endpoint == null || endpoint.getPrimaryUri() == null) {
throw LOGGER
.logExceptionAsError(new IllegalArgumentException(
"connectionString missing required settings to derive blob service endpoint."));
}
this.endpoint(endpoint.getPrimaryUri());
if (storageConnectionString.getAccountName() != null) {
this.accountName = storageConnectionString.getAccountName();
}
StorageAuthenticationSettings authSettings = storageConnectionString.getStorageAuthSettings();
if (authSettings.getType() == StorageAuthenticationSettings.Type.ACCOUNT_NAME_KEY) {
this.credential(new StorageSharedKeyCredential(authSettings.getAccount().getName(),
authSettings.getAccount().getAccessKey()));
} else if (authSettings.getType() == StorageAuthenticationSettings.Type.SAS_TOKEN) {
this.sasToken(authSettings.getSasToken());
}
return this;
}
/**
* Sets the service endpoint, additionally parses it for information (SAS token, container name, blob name)
*
* If the blob name contains special characters, pass in the url encoded version of the blob name.
*
* If the endpoint is to a blob in the root container, this method will fail as it will interpret the blob name
* as the container name. With only one path element, it is impossible to distinguish between a container name and
* a blob in the root container, so it is assumed to be the container name as this is much more common. When working
* with blobs in the root container, it is best to set the endpoint to the account url and specify the blob name
* separately using the {@link BlobClientBuilder#blobName(String) blobName} method.
*
* @param endpoint URL of the service
* @return the updated BlobClientBuilder object
* @throws IllegalArgumentException If {@code endpoint} is {@code null} or is a malformed URL.
*/
@Override
public BlobClientBuilder endpoint(String endpoint) {
try {
URL url = new URL(endpoint);
BlobUrlParts parts = BlobUrlParts.parse(url);
this.accountName = parts.getAccountName();
this.endpoint = BuilderHelper.getEndpoint(parts);
this.containerName = parts.getBlobContainerName() == null ? this.containerName
: parts.getBlobContainerName();
this.blobName = parts.getBlobName() == null ? this.blobName : Utility.urlEncode(parts.getBlobName());
this.snapshot = parts.getSnapshot();
this.versionId = parts.getVersionId();
String sasToken = parts.getCommonSasQueryParameters().encode();
if (!CoreUtils.isNullOrEmpty(sasToken)) {
this.sasToken(sasToken);
}
} catch (MalformedURLException ex) {
throw LOGGER.logExceptionAsError(
new IllegalArgumentException("The Azure Storage Blob endpoint url is malformed.", ex));
}
return this;
}
/**
* Sets the name of the container that contains the blob.
*
* @param containerName Name of the container. If the value {@code null} or empty the root container, {@code $root}
* , will be used.
* @return the updated BlobClientBuilder object
*/
public BlobClientBuilder containerName(String containerName) {
this.containerName = containerName;
return this;
}
/**
* Sets the name of the blob.
*
* @param blobName Name of the blob. If the blob name contains special characters, pass in the url encoded version
* of the blob name.
* @return the updated BlobClientBuilder object
* @throws NullPointerException If {@code blobName} is {@code null}
*/
public BlobClientBuilder blobName(String blobName) {
this.blobName = Utility.urlEncode(Utility.urlDecode(Objects.requireNonNull(blobName,
"'blobName' cannot be null.")));
return this;
}
/**
* Sets the snapshot identifier of the blob.
*
* @param snapshot Snapshot identifier for the blob.
* @return the updated BlobClientBuilder object
*/
public BlobClientBuilder snapshot(String snapshot) {
this.snapshot = snapshot;
return this;
}
/**
* Sets the version identifier of the blob.
*
* @param versionId Version identifier for the blob, pass {@code null} to interact with the latest blob version.
* @return the updated BlobClientBuilder object
*/
public BlobClientBuilder versionId(String versionId) {
this.versionId = versionId;
return this;
}
/**
* Sets the {@link HttpClient} to use for sending and receiving requests to and from the service.
*
* Note: It is important to understand the precedence order of the HttpTrait APIs. In
* particular, if a {@link HttpPipeline} is specified, this takes precedence over all other APIs in the trait, and
* they will be ignored. If no {@link HttpPipeline} is specified, a HTTP pipeline will be constructed internally
* based on the settings provided to this trait. Additionally, there may be other APIs in types that implement this
* trait that are also ignored if an {@link HttpPipeline} is specified, so please be sure to refer to the
* documentation of types that implement this trait to understand the full set of implications.
*
* @param httpClient The {@link HttpClient} to use for requests.
* @return the updated BlobClientBuilder object
*/
@Override
public BlobClientBuilder httpClient(HttpClient httpClient) {
if (this.httpClient != null && httpClient == null) {
LOGGER.info("'httpClient' is being set to 'null' when it was previously configured.");
}
this.httpClient = httpClient;
return this;
}
/**
* Adds a {@link HttpPipelinePolicy pipeline policy} to apply on each request sent.
*
* Note: It is important to understand the precedence order of the HttpTrait APIs. In
* particular, if a {@link HttpPipeline} is specified, this takes precedence over all other APIs in the trait, and
* they will be ignored. If no {@link HttpPipeline} is specified, a HTTP pipeline will be constructed internally
* based on the settings provided to this trait. Additionally, there may be other APIs in types that implement this
* trait that are also ignored if an {@link HttpPipeline} is specified, so please be sure to refer to the
* documentation of types that implement this trait to understand the full set of implications.
*
* @param pipelinePolicy A {@link HttpPipelinePolicy pipeline policy}.
* @return the updated BlobClientBuilder object
* @throws NullPointerException If {@code pipelinePolicy} is {@code null}.
*/
@Override
public BlobClientBuilder addPolicy(HttpPipelinePolicy pipelinePolicy) {
Objects.requireNonNull(pipelinePolicy, "'pipelinePolicy' cannot be null");
if (pipelinePolicy.getPipelinePosition() == HttpPipelinePosition.PER_CALL) {
perCallPolicies.add(pipelinePolicy);
} else {
perRetryPolicies.add(pipelinePolicy);
}
return this;
}
/**
* Sets the {@link HttpLogOptions logging configuration} to use when sending and receiving requests to and from
* the service. If a {@code logLevel} is not provided, default value of {@link HttpLogDetailLevel#NONE} is set.
*
* Note: It is important to understand the precedence order of the HttpTrait APIs. In
* particular, if a {@link HttpPipeline} is specified, this takes precedence over all other APIs in the trait, and
* they will be ignored. If no {@link HttpPipeline} is specified, a HTTP pipeline will be constructed internally
* based on the settings provided to this trait. Additionally, there may be other APIs in types that implement this
* trait that are also ignored if an {@link HttpPipeline} is specified, so please be sure to refer to the
* documentation of types that implement this trait to understand the full set of implications.
*
* @param logOptions The {@link HttpLogOptions logging configuration} to use when sending and receiving requests to
* and from the service.
* @return the updated BlobClientBuilder object
* @throws NullPointerException If {@code logOptions} is {@code null}.
*/
@Override
public BlobClientBuilder httpLogOptions(HttpLogOptions logOptions) {
this.logOptions = Objects.requireNonNull(logOptions, "'logOptions' cannot be null.");
return this;
}
/**
* Gets the default Storage allowlist log headers and query parameters.
*
* @return the default http log options.
*/
public static HttpLogOptions getDefaultHttpLogOptions() {
return BuilderHelper.getDefaultHttpLogOptions();
}
/**
* Sets the configuration object used to retrieve environment configuration values during building of the client.
*
* @param configuration Configuration store used to retrieve environment configurations.
* @return the updated BlobClientBuilder object
*/
@Override
public BlobClientBuilder configuration(Configuration configuration) {
this.configuration = configuration;
return this;
}
/**
* Sets the request retry options for all the requests made through the client.
*
* Setting this is mutually exclusive with using {@link #retryOptions(RetryOptions)}.
*
* @param retryOptions {@link RequestRetryOptions}.
* @return the updated BlobClientBuilder object
*/
public BlobClientBuilder retryOptions(RequestRetryOptions retryOptions) {
this.retryOptions = retryOptions;
return this;
}
/**
* Sets the {@link RetryOptions} for all the requests made through the client.
*
* Note: It is important to understand the precedence order of the HttpTrait APIs. In
* particular, if a {@link HttpPipeline} is specified, this takes precedence over all other APIs in the trait, and
* they will be ignored. If no {@link HttpPipeline} is specified, a HTTP pipeline will be constructed internally
* based on the settings provided to this trait. Additionally, there may be other APIs in types that implement this
* trait that are also ignored if an {@link HttpPipeline} is specified, so please be sure to refer to the
* documentation of types that implement this trait to understand the full set of implications.
*
* Setting this is mutually exclusive with using {@link #retryOptions(RequestRetryOptions)}.
* Consider using {@link #retryOptions(RequestRetryOptions)} to also set storage specific options.
*
* @param retryOptions The {@link RetryOptions} to use for all the requests made through the client.
* @return the updated BlobClientBuilder object
*/
@Override
public BlobClientBuilder retryOptions(RetryOptions retryOptions) {
this.coreRetryOptions = retryOptions;
return this;
}
/**
* Allows for setting common properties such as application ID, headers, proxy configuration, etc. Note that it is
* recommended that this method be called with an instance of the {@link HttpClientOptions}
* class (a subclass of the {@link ClientOptions} base class). The HttpClientOptions subclass provides more
* configuration options suitable for HTTP clients, which is applicable for any class that implements this HttpTrait
* interface.
*
*
Note: It is important to understand the precedence order of the HttpTrait APIs. In
* particular, if a {@link HttpPipeline} is specified, this takes precedence over all other APIs in the trait, and
* they will be ignored. If no {@link HttpPipeline} is specified, a HTTP pipeline will be constructed internally
* based on the settings provided to this trait. Additionally, there may be other APIs in types that implement this
* trait that are also ignored if an {@link HttpPipeline} is specified, so please be sure to refer to the
* documentation of types that implement this trait to understand the full set of implications.
*
* @param clientOptions A configured instance of {@link HttpClientOptions}.
* @see HttpClientOptions
* @return the updated BlobClientBuilder object
* @throws NullPointerException If {@code clientOptions} is {@code null}.
*/
@Override
public BlobClientBuilder clientOptions(ClientOptions clientOptions) {
this.clientOptions = Objects.requireNonNull(clientOptions, "'clientOptions' cannot be null.");
return this;
}
/**
* Sets the {@link HttpPipeline} to use for the service client.
*
* Note: It is important to understand the precedence order of the HttpTrait APIs. In
* particular, if a {@link HttpPipeline} is specified, this takes precedence over all other APIs in the trait, and
* they will be ignored. If no {@link HttpPipeline} is specified, a HTTP pipeline will be constructed internally
* based on the settings provided to this trait. Additionally, there may be other APIs in types that implement this
* trait that are also ignored if an {@link HttpPipeline} is specified, so please be sure to refer to the
* documentation of types that implement this trait to understand the full set of implications.
*
* The {@link #endpoint(String) endpoint} is not ignored when {@code pipeline} is set.
*
* @param httpPipeline {@link HttpPipeline} to use for sending service requests and receiving responses.
* @return the updated BlobClientBuilder object
*/
@Override
public BlobClientBuilder pipeline(HttpPipeline httpPipeline) {
if (this.httpPipeline != null && httpPipeline == null) {
LOGGER.info("HttpPipeline is being set to 'null' when it was previously configured.");
}
this.httpPipeline = httpPipeline;
return this;
}
/**
* Sets the {@link BlobServiceVersion} that is used when making API requests.
*
* If a service version is not provided, the service version that will be used will be the latest known service
* version based on the version of the client library being used. If no service version is specified, updating to a
* newer version of the client library will have the result of potentially moving to a newer service version.
*
* Targeting a specific service version may also mean that the service will return an error for newer APIs.
*
* @param version {@link BlobServiceVersion} of the service to be used when making requests.
* @return the updated BlobClientBuilder object
*/
public BlobClientBuilder serviceVersion(BlobServiceVersion version) {
this.version = version;
return this;
}
/**
* Sets the Audience to use for authentication with Azure Active Directory (AAD). The audience is not considered
* when using a shared key.
* @param audience {@link BlobAudience} to be used when requesting a token from Azure Active Directory (AAD).
* @return the updated BlobClientBuilder object
*/
public BlobClientBuilder audience(BlobAudience audience) {
this.audience = audience;
return this;
}
}