Object Storage Service:Guide to upgrading from Signature V1 to Signature V4

Java

1. Upgrade OSS Java SDK to version 3.17.4 or later.

2. When you initialize an OSS Client with Signature V4, you must perform the following steps:

   • Specify the region ID of the bucket as the identifier for the request region. For example, the region ID for China (Hangzhou) is cn-hangzhou.

   • Explicitly declare the use of the V4 signature algorithm. For example: SignVersion.V4.

import com.aliyun.oss.*; import com.aliyun.oss.common.auth.*; import com.aliyun.oss.common.comm.SignVersion; public class OSSClientV4 { public static void main(String[] args) throws Exception { // Specify the endpoint of the region in which the bucket is located. In this example, the endpoint of the China (Hangzhou) region is used. String endpoint = "https://oss-cn-hangzhou.aliyuncs.com"; // Specify the ID of the region of the bucket. In this example, the ID of the China (Hangzhou) region is used: cn-hangzhou. String region = "cn-hangzhou"; // Obtain credentials from the environment variables. Before you run the sample code, make sure that the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables are configured. EnvironmentVariableCredentialsProvider credentialsProvider = CredentialsProviderFactory.newEnvironmentVariableCredentialsProvider(); // Create an OSSClient instance. // When you no longer use the OSSClient instance, call the shutdown method to release resources. ClientBuilderConfiguration clientBuilderConfiguration = new ClientBuilderConfiguration(); // Explicitly declare the use of the V4 signature algorithm. clientBuilderConfiguration.setSignatureVersion(SignVersion.V4); OSS ossClient = OSSClientBuilder.create() .endpoint(endpoint) .credentialsProvider(credentialsProvider) .clientConfiguration(clientBuilderConfiguration) .region(region) .build(); // Use the OSSClient instance to initiate requests, such as uploading, downloading, or managing objects. // When you no longer use the OSSClient instance, call the shutdown method to release resources. ossClient.shutdown(); } }

Python

import alibabacloud_oss_v2 as oss def main(): # Obtain access credentials from environment variables for authentication. credentials_provider = oss.credentials.EnvironmentVariableCredentialsProvider() # Load the default configuration of the SDK and specify the credential provider. cfg = oss.config.load_default() cfg.credentials_provider = credentials_provider # Method 1: Specify only the region. # Specify the region in which the bucket is located. For example, if your bucket is located in the China (Hangzhou) region, set the region to cn-hangzhou. cfg.region = 'cn-hangzhou' # # Method 2: Specify the endpoint and region. # # Specify the region in which the bucket is located. For example, if your bucket is located in the China (Hangzhou) region, set the region to cn-hangzhou. # cfg.region = 'cn-hangzhou' # # Specify the public endpoint of the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the endpoint to https://oss-cn-hangzhou.aliyuncs.com. # # To use the HTTP protocol, set the endpoint to http://oss-cn-hangzhou.aliyuncs.com. # cfg.endpoint = 'https://oss-cn-hangzhou.aliyuncs.com' # Use the configuration to create a Client instance. client = oss.Client(cfg) # Use the Client instance to perform subsequent operations. # Call the main function when the script is directly run. if __name__ == "__main__": main() # The entry point of the script. When the script is directly run, the main function is called.

# -*- coding: utf-8 -*- import oss2 from oss2.credentials import EnvironmentVariableCredentialsProvider # Obtain access credentials from environment variables. Before you run the sample code, make sure that the environment variables are configured. auth = oss2.ProviderAuthV4(EnvironmentVariableCredentialsProvider()) # Specify the endpoint of the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the endpoint to https://oss-cn-hangzhou.aliyuncs.com. endpoint = 'yourEndpoint' # Specify the region of the endpoint. Example: cn-hangzhou. region = 'cn-hangzhou' # Specify the name of the bucket. bucket = oss2.Bucket(auth, endpoint, 'examplebucket', region=region) 

Go

package main import (	"github.com/aliyun/alibabacloud-oss-go-sdk-v2/oss"	"github.com/aliyun/alibabacloud-oss-go-sdk-v2/oss/credentials" ) func main() {	// Method 1: Specify only the region	// Specify the region where the bucket is located. For example, if the region is China (Hangzhou), specify the region as cn-hangzhou	cfg := oss.LoadDefaultConfig().	WithCredentialsProvider(credentials.NewEnvironmentVariableCredentialsProvider()).	WithRegion("cn-hangzhou")	// Method 2: Specify both the region and endpoint	// Specify the region where the bucket is located. For example, if the region is China (Hangzhou), specify the region as cn-hangzhou	// Specify the public endpoint that corresponds to the region where the bucket is located. For example, if the region is China (Hangzhou), specify the endpoint as 'https://oss-cn-hangzhou.aliyuncs.com'. If you want to use the HTTP protocol, specify 'http://oss-cn-hangzhou.aliyuncs.com' when you specify the endpoint	// cfg := oss.LoadDefaultConfig().	// WithCredentialsProvider(credentials.NewEnvironmentVariableCredentialsProvider()).	// WithRegion("cn-hangzhou").	// WithEndpoint("https://oss-cn-hangzhou.aliyuncs.com")	// Create an OSS client	client := oss.NewClient(cfg)	// Use the client to perform subsequent operations... } 

package main import (	"log"	"github.com/aliyun/aliyun-oss-go-sdk/oss" ) // Call handleError to handle unrecoverable errors and terminate the program after recording the error messages. func handleError(err error) {	log.Fatalf("Error: %v", err) } // Use setupClient to create and configure an OSSClient instance. // Parameters: // //	endpoint: endpoint of the region in which the bucket is located. //	region: the region in which the bucket is located. // // Return the created OSSClient instance. func setupClient(endpoint, region string) (*oss.Client, error) {	// Obtain access credentials from environment variables.	provider, err := oss.NewEnvironmentVariableCredentialsProvider()	if err != nil {	return nil, err	}	// Create an OSSClient instance and use the signature algorithm V4.	client, err := oss.New(endpoint, "", "", oss.SetCredentialsProvider(&provider), oss.AuthVersion(oss.AuthV4), oss.Region(region))	if err != nil {	return nil, err	}	return client, nil } func main() {	// Specify the endpoint of the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the endpoint to https://oss-cn-hangzhou.aliyuncs.com. Specify your actual endpoint.	endpoint := "yourEndpoint"	// Specify the ID of the region that maps to the endpoint. Example: cn-hangzhou.	region := "yourRegion"	// Check whether the environment variables are configured.	if endpoint == "" || region == "" {	log.Fatal("Please set yourEndpoint and yourRegion.")	}	// Create and configure an OSSClient instance.	client, err := setupClient(endpoint, region)	if err != nil {	handleError(err)	}	// Display the client information.	log.Printf("Client: %#v\n", client) } 

PHP

<?php // Include the autoload file to load dependencies. require_once __DIR__ . '/../vendor/autoload.php'; use AlibabaCloud\Oss\V2 as Oss; // Use EnvironmentVariableCredentialsProvider to retrieve the AccessKey ID and AccessKey secret from environment variables. $credentialsProvider = new Oss\Credentials\EnvironmentVariableCredentialsProvider(); # Load the default configuration of the SDK and specify the credential provider. $cfg = Oss\Config::loadDefault(); $cfg->setCredentialsProvider(credentialsProvider: $credentialsProvider); // Specify the credential provider. // Method 1: Specify only the region. // Specify the region in which the bucket is located. For example, if your bucket is located in the China (Hangzhou) region, set the region to cn-hangzhou. $cfg->setRegion(region: "cn-hangzhou"); // // Method 2: Specify the endpoint and region. // // Specify the region in which the bucket is located. For example, if your bucket is located in the China (Hangzhou) region, set the region to cn-hangzhou. // // Specify the public endpoint of the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the endpoint to https://oss-cn-hangzhou.aliyuncs.com. // // To use the HTTP protocol, set the endpoint to http://oss-cn-hangzhou.aliyuncs.com. // $cfg->setRegion(region: 'cn-hangzhou')->setEndpoint(endpoint: 'https://oss-cn-hangzhou.aliyuncs.com'); // Create an OSSClient instance. $client = new Oss\Client($cfg); // Use the OSSClient instance to perform subsequent operations.

<?php if (is_file(__DIR__ . '/../autoload.php')) { require_once __DIR__ . '/../autoload.php'; } if (is_file(__DIR__ . '/../vendor/autoload.php')) { require_once __DIR__ . '/../vendor/autoload.php'; } use OSS\Credentials\EnvironmentVariableCredentialsProvider; use OSS\OssClient; use OSS\Core\OssException; try { // Obtain access credentials from environment variables and save the credentials in the provider. Before you run the sample code, make sure that the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables are configured. $provider = new EnvironmentVariableCredentialsProvider(); // Specify the endpoint of the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the endpoint to https://oss-cn-hangzhou.aliyuncs.com. $endpoint = "https://oss-cn-hangzhou.aliyuncs.com"; $config = array( "provider" => $provider, "endpoint" => $endpoint, ); $ossClient = new OssClient($config); } catch (OssException $e) { printf($e->getMessage() . "\n"); return; }

C#

using OSS = AlibabaCloud.OSS.V2; // Create an alias for Alibaba Cloud OSS SDK to simplify subsequent use var region = "cn-hangzhou"; // Required. Set the region where the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the region to cn-hangzhou var endpoint = null as string; // Optional. Specify the endpoint for accessing the OSS service. For example, if the bucket is located in the China (Hangzhou) region, set the endpoint to https://oss-cn-hangzhou.aliyuncs.com // Load the default configuration of OSS SDK, which automatically reads credential information (such as AccessKey) from environment variables var cfg = OSS.Configuration.LoadDefault(); // Explicitly set to use environment variables to obtain credentials for authentication (format: OSS_ACCESS_KEY_ID, OSS_ACCESS_KEY_SECRET) cfg.CredentialsProvider = new OSS.Credentials.EnvironmentVariableCredentialsProvider(); // Set the bucket region in the configuration cfg.Region = region; // If an endpoint is specified, override the default endpoint if(endpoint != null) { cfg.Endpoint = endpoint; } // Create an OSS client instance using the configuration information using var client = new OSS.Client(cfg); // Use the created client for subsequent operations...

using Aliyun.OSS; using Aliyun.OSS.Common; // Obtain access credentials from environment variables. Before you run the sample code, make sure that the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables are configured. var accessKeyId = Environment.GetEnvironmentVariable("OSS_ACCESS_KEY_ID"); var accessKeySecret=Environment.GetEnvironmentVariable ("OSS_ACCESS_KEY_SECRET"); // Specify the endpoint of the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the endpoint to https://oss-cn-hangzhou.aliyuncs.com. const string endpoint = "https://oss-cn-hangzhou.aliyuncs.com"; // Specify the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the region to cn-hangzhou. const string region = "cn-hangzhou"; // Create a ClientConfiguration instance and modify the default parameters based on your requirements. var conf = new ClientConfiguration(); // Specify the V4 signature. conf.SignatureVersion = SignatureVersion.V4; // Create an OSSClient instance. var client = new OssClient(endpoint, accessKeyId, accessKeySecret, conf); client.SetRegion(region);

Node.js

1. Upgrade OSS Node.js SDK to version 6.20.0 or later.

2. When you initialize an OSS Client with Signature V4, you must perform the following steps:

   • Specify the dedicated OSS region ID of the bucket as the identifier for the request region. For example, the region ID for China (Hangzhou) is oss-cn-hangzhou.

   • Explicitly declare the use of the V4 signature algorithm. For example: authorizationV4.

const OSS = require('ali-oss'); const client = new OSS({ // Obtain access credentials from environment variables. Before you run the sample code, make sure that the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables have been configured. accessKeyId: process.env.OSS_ACCESS_KEY_ID, accessKeySecret: process.env.OSS_ACCESS_KEY_SECRET, // Specify the region in which the bucket is located. For example, if your bucket is located in the China (Hangzhou) region, set the region to oss-cn-hangzhou. region: 'oss-cn-hangzhou', // Use the V4 signature algorithm authorizationV4: true, // Specify the name of the bucket. bucket: 'yourBucketName', // Specify the public endpoint for the region where the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the endpoint to https://oss-cn-hangzhou.aliyuncs.com. endpoint: 'https://oss-cn-hangzhou.aliyuncs.com', });

Browser.js

1. Upgrade OSS Browser.js SDK to version 6.20.0 or later.

2. When you initialize an OSS Client with Signature V4, you must perform the following steps:

   • Specify the dedicated OSS region ID of the bucket as the identifier for the request region. For example, the region ID for China (Hangzhou) is oss-cn-hangzhou.

   • Explicitly declare the use of the V4 signature algorithm. For example: authorizationV4.

<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8" /> <title>Document</title> </head> <body> <!-- Import the SDK file --> <script type="text/javascript" src="https://gosspublic.alicdn.com/aliyun-oss-sdk-6.20.0.min.js" ></script> <script type="text/javascript"> const client = new OSS({ // Specify the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the region to oss-cn-hangzhou. region: 'yourRegion',	authorizationV4: true, // Specify the temporary AccessKey pair obtained from Security Token Service (STS). The AccessKey pair consists of an AccessKey ID and an AccessKey secret. accessKeyId: 'yourAccessKeyId', accessKeySecret: 'yourAccessKeySecret', // Specify the security token obtained from STS. stsToken: 'yourSecurityToken', // Specify the name of the bucket. Example: examplebucket. bucket: "examplebucket", }); </script> </body> </html>

C++

1. Upgrade OSS C++ SDK to version 1.10.0 or later.

2. When you initialize an OSS Client with Signature V4, you must perform the following steps:

   • Specify the region ID of the bucket as the identifier for the request region. For example, the region ID for China (Hangzhou) is cn-hangzhou.

   • Explicitly declare the use of the V4 signature algorithm. For example: SignatureVersionType::V4.

#include <alibabacloud/oss/OssClient.h> using namespace AlibabaCloud::OSS; int main(void) { /* Initialize information about the account that is used to access OSS. */ /* Specify the endpoint of the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the endpoint to https://oss-cn-hangzhou.aliyuncs.com. */ std::string Endpoint = "yourEndpoint"; /* Specify the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the region to cn-hangzhou. */ std::string Region = "yourRegion"; /* Initialize resources, such as network resources. */ InitializeSdk(); ClientConfiguration conf; conf.signatureVersion = SignatureVersionType::V4; /* Obtain access credentials from environment variables. Before you run the sample code, make sure that the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables are configured. */ auto credentialsProvider = std::make_shared<EnvironmentVariableCredentialsProvider>(); OssClient client(Endpoint, credentialsProvider, conf); client.SetRegion(Region); /* Release resources, such as network resources. */ ShutdownSdk(); return 0; }

C

1. Upgrade OSS C SDK to version 3.11.0 or later.

2. When you initialize an OSS Client with Signature V4, you must perform the following steps:

   • Specify the region ID of the bucket as the identifier for the request region. For example, the region ID for China (Hangzhou) is cn-hangzhou.

   • Explicitly declare the use of the V4 signature algorithm. For example: signature_version = 4.

#include "oss_api.h" #include "aos_http_io.h" /* Specify the endpoint of the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the endpoint to https://oss-cn-hangzhou.aliyuncs.com. */ const char *endpoint = "yourEndpoint"; /* Specify the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the region to cn-hangzhou. */ const char *region = "yourRegion"; void init_options(oss_request_options_t *options) { options->config = oss_config_create(options->pool); /* Use a char* string to initialize the aos_string_t data type. */ aos_str_set(&options->config->endpoint, endpoint); /* Obtain access credentials from environment variables. Before you run the sample code, make sure that the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables are configured. */ aos_str_set(&options->config->access_key_id, getenv("OSS_ACCESS_KEY_ID")); aos_str_set(&options->config->access_key_secret, getenv("OSS_ACCESS_KEY_SECRET")); // Specify two additional parameters. aos_str_set(&options->config->region, region); options->config->signature_version = 4; /* Specify whether to use CNAME to access OSS. The value 0 indicates that CNAME is not used. */ options->config->is_cname = 0; /* Specify network parameters. The second parameter in this function specifies the ownership of ctl. By default, the value of the second parameter is 0. */ options->ctl = aos_http_controller_create(options->pool, 0); } int main() { aos_pool_t *p; oss_request_options_t *options; /* Initialize global variables. You need to initialize global variables only once in the program lifecycle. */ if (aos_http_io_initialize(NULL, 0) != AOSE_OK) { return -1; } /* Initialize the memory pool and options. */ aos_pool_create(&p, NULL); options = oss_request_options_create(p); init_options(options); /* The logic code. In this example, the logic code is omitted. */ /* Release the memory pool. This operation releases the memory resources allocated for the request. */ aos_pool_destroy(p); /* Release global resources that are allocated. You need to release global resources only once in the program lifecycle. */ aos_http_io_deinitialize(); return 0; }

Swift

1. All versions of OSS Swift SDK support Signature V4 by default.

2. When you initialize an OSS Client with Signature V4, you must perform the following step:

   Specify the region ID of the bucket as the identifier for the request region. For example, the region ID for China (Hangzhou) is cn-hangzhou.

import AlibabaCloudOSS import Foundation @main struct Main { static func main() async { // Specify the bucket's region (Example: China (Hangzhou) is cn-hangzhou). let region = "cn-hangzhou" // Optional. Specify the domain name to access the OSS service. For example, if the region is China (Hangzhou), set the Endpoint to https://oss-cn-hangzhou.aliyuncs.com. let endpoint: String? = nil // Obtain access credentials from environment variables. Before you run this code, make sure that the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables are set. let credentialsProvider = EnvironmentCredentialsProvider() // Configure OSS client parameters. let config = Configuration.default() .withRegion(region) // Set the bucket's region. .withCredentialsProvider(credentialsProvider) // Set the access credentials. // Set a custom Endpoint. if let endpoint = endpoint { config.withEndpoint(endpoint) } // Create an OSS client instance. let client = Client(config) } }

iOS

1. Upgrade OSS iOS SDK to version 2.11.1 or later.

2. When you initialize an OSS Client with Signature V4, you must perform the following steps:

   • Specify the region ID of the bucket as the identifier for the request region. For example, the region ID for China (Hangzhou) is cn-hangzhou.

   • Explicitly declare the use of the V4 signature algorithm. For example: OSSSignVersionV4.

// Specify the endpoint of the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the endpoint to https://oss-cn-hangzhou.aliyuncs.com. NSString *endpoint = @"yourEndpoint"; // Specify the temporary AccessKey pair obtained from STS. An AccessKey pair consists of an AccessKey ID and an AccessKey secret. NSString *accessKeyId = @"yourAccessKeyId"; NSString *accessKeySecret = @"yourAccessKeySecret"; // Specify the security token obtained from STS. NSString *securityToken = @"yourSecurityToken"; NSString *region = @"yourRegion"; id<OSSCredentialProvider> credentialProvider = [[OSSStsTokenCredentialProvider alloc] initWithAccessKeyId:accessKeyId secretKeyId:accessKeySecret securityToken:securityToken]; OSSClientConfiguration *configuration = [OSSClientConfiguration new]; configuration.signVersion = OSSSignVersionV4; OSSClient *client = [[OSSClient alloc] initWithEndpoint:endpoint credentialProvider:credentialProvider clientConfiguration:configuration]; client.region = region;

Android

1. Upgrade OSS Android SDK to version 2.3 or later.

2. When you initialize an OSS Client with Signature V4, you must perform the following steps:

   • Specify the region ID of the bucket as the identifier for the request region. For example, the region ID for China (Hangzhou) is cn-hangzhou.

   • Explicitly declare the use of the V4 signature algorithm. For example: SignVersion.V4.

// Specify the endpoint of the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the endpoint to https://oss-cn-hangzhou.aliyuncs.com. String endpoint = "yourEndpoint"; // Specify the temporary AccessKey pair obtained from STS. String accessKeyId = "yourAccessKeyId"; String accessKeySecret = "yourAccessKeySecret"; // Specify the security token obtained from STS. String securityToken = "yourSecurityToken"; // Specify the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the region to cn-hangzhou. String region = "yourRegion"; OSSCredentialProvider credentialProvider = new OSSStsTokenCredentialProvider(accessKeyId, accessKeySecret, securityToken); ClientConfiguration config = new ClientConfiguration(); config.setSignVersion(SignVersion.V4); // Create an OSSClient instance. OSSClient oss = new OSSClient(getApplicationContext(), endpoint, credentialProvider); oss.setRegion(region);

ossutil 2.0

All versions of the ossutil 2.0 command line interface support Signature V4 by default.

Compared with Signature V1, when you use Signature V4, you must set the Region parameter to the region ID of the bucket when you configure ossutil.

Please enter Region [cn-hangzhou]:cn-hangzhou

ossutil 1.0

Version 1.7.12 and later of the ossutil 1.0 command line interface support Signature V4.

Compared with Signature V1, when you use Signature V4, you must do the following in the command:

• Set the --sign-version option to v4.

• Set the --region option to the region ID of the bucket.

./ossutil64 --sign-version v4 --region cn-hangzhou mb oss://examplebucket

ossfs 2.0

All versions of ossfs 2.0 (Preview) support Signature V4, but use Signature V1 by default.

1. Before you upgrade, run the ossfs --version command to check the current version and complete the following prerequisites based on your version.

   Important

   The uninstallation will interrupt your services. We recommend that you perform this operation during off-peak hours.

   Unmount the mounted OSS file system. Replace <mountpoint> with your actual directory.

   sudo umount <mountpoint>

   After unmounting, follow the sample command to upgrade.

2. Compared with Signature V1, when you use Signature V4, you must do the following in the mount command:

• Set the oss_region option to the region ID of the bucket.

ossfs2 mount /tmp/ossfs2-bucket/ -c /etc/ossfs2.conf --oss_region=cn-hongkong

ossfs 1.0

Version 1.91.4 and later of ossfs 1.0 support Signature V4.

1. Before you upgrade, run the ossfs --version command to check the current version and complete the following prerequisites based on your version.

   Important

   The uninstallation will interrupt your services. We recommend that you perform this operation during off-peak hours.

   Upgrade to V4 if the version requirement is met

   Unmount the mounted OSS file system. Replace <mountpoint> with your actual directory.

   sudo umount <mountpoint>

   After unmounting, follow the Sample command to upgrade.

   Upgrade to V4 if the version requirement is not met

   1. Unmount the mounted OSS file system. Replace <mountpoint> with your actual directory.

      sudo umount <mountpoint>

   2. Uninstall the old version.

      If you installed ossfs using a package manager, such as apt or yum, run the following command:

      sudo apt remove ossfs # For Ubuntu/Debian systems sudo yum remove ossfs # For CentOS/Anolis/Alibaba Cloud Linux systems

      If you compiled and installed ossfs from source code, go to the installation directory and run the following command:

      sudo make uninstall

   3. Download and install the new version.

   After you install the new version, follow the Sample command to upgrade.

2. Compared with Signature V1, when you use Signature V4, you must do the following in the mount command:

• Set the sigv4 option.

• Set the region option to the region ID of the bucket.

ossfs examplebucket -o sigv4 -o region=cn-hangzhou /tmp/ossfs -o url=http://oss-cn-hangzhou.aliyuncs.com