Object Storage Service:Delete object tags using Go

Usage notes

• In this topic, the public endpoint of the China (Hangzhou) region is used. If you want to access OSS from other Alibaba Cloud services in the same region as OSS, use an internal endpoint. For more information about OSS regions and endpoints, see Regions and endpoints.

• In this topic, access credentials are obtained from environment variables. For more information about how to configure access credentials, see Configure access credentials.

• In this topic, an OSSClient instance is created by using an OSS endpoint. If you want to create an OSSClient instance by using custom domain names or Security Token Service (STS), see Configure OSSClient instances.

• To delete the tags of an object, you must have the oss:DeleteObjectTagging permission. For more information, see Attach a custom policy to a RAM user.

Delete tags from an object

If versioning is not enabled for the bucket that stores the object whose tags you want to delete, you can delete the tags of the object based on your requirements. If versioning is enabled for the bucket that stores the object whose tags you want to delete, OSS deletes the tags of the current version of the object by default.

The following code provides an example on how to delete the tags of the exampleobject.txt object in the exampledir directory of the examplebucket bucket:

package main

import (
	"fmt"
	"os"

	"github.com/aliyun/aliyun-oss-go-sdk/oss"
)

func main() {
	// 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.
	provider, err := oss.NewEnvironmentVariableCredentialsProvider()
	if err != nil {
		fmt.Println("Error:", err)
		os.Exit(-1)
	}
	// Create an OSSClient instance.
	// Set yourEndpoint to the Endpoint of the bucket. For example, for the China (Hangzhou) region, set the Endpoint to https://oss-cn-hangzhou.aliyuncs.com. For other regions, use the actual Endpoint.
	// Set yourRegion to the region where the bucket is located. For example, for the China (Hangzhou) region, set the region to cn-hangzhou. For other regions, use the actual region.
	clientOptions := []oss.ClientOption{oss.SetCredentialsProvider(&provider)}
	clientOptions = append(clientOptions, oss.Region("yourRegion"))
	// Set the signature version.
	clientOptions = append(clientOptions, oss.AuthVersion(oss.AuthV4))
	client, err := oss.New("yourEndpoint", "", "", clientOptions...)
	if err != nil {
		fmt.Println("Error:", err)
		os.Exit(-1)
	}

	// Specify the bucket name. Example: examplebucket.
	bucketName := "examplebucket"
	// Specify the full path of the object. Example: exampledir/exampleobject.txt. The full path cannot contain the bucket name.
	objectName := "exampledir/exampleobject.txt"

	// Obtain the bucket.
	bucket, err := client.Bucket(bucketName)
	if err != nil {
		fmt.Println("Error:", err)
		os.Exit(-1)
	}

	// Delete the object tags.
	err = bucket.DeleteObjectTagging(objectName)
	if err != nil {
		fmt.Println("Error:", err)
		os.Exit(-1)
	}
	fmt.Println("delete object tagging success.")
}

Delete tags from a specific version of an object

If versioning is enabled for the bucket that stores the object whose tags you want to delete, you can delete the tags of a specified version of the object by specifying the version ID of the object.

The following code provides an example on how to delete the tags of a specified version of the exampleobject.txt object in the exampledir directory of the examplebucket bucket:

package main

import (
	"fmt"
	"os"

	"github.com/aliyun/aliyun-oss-go-sdk/oss"
)

func HandleError(err error) {
	fmt.Println("Error:", err)
	os.Exit(-1)
}

func main() {
	// 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.
	provider, err := oss.NewEnvironmentVariableCredentialsProvider()
	if err != nil {
		fmt.Println("Error:", err)
		os.Exit(-1)
	}
	// Create an OSSClient instance.
	// Set yourEndpoint to the Endpoint of the bucket. For example, for the China (Hangzhou) region, set the Endpoint to https://oss-cn-hangzhou.aliyuncs.com. For other regions, use the actual Endpoint.
	// Set yourRegion to the region where the bucket is located. For example, for the China (Hangzhou) region, set the region to cn-hangzhou. For other regions, use the actual region.
	clientOptions := []oss.ClientOption{oss.SetCredentialsProvider(&provider)}
	clientOptions = append(clientOptions, oss.Region("yourRegion"))
	// Set the signature version.
	clientOptions = append(clientOptions, oss.AuthVersion(oss.AuthV4))
	client, err := oss.New("yourEndpoint", "", "", clientOptions...)
	if err != nil {
		fmt.Println("Error:", err)
		os.Exit(-1)
	}

	// Specify the bucket name. Example: examplebucket.
	bucketName := "examplebucket"
	// Specify the full path of the object. Example: exampledir/exampleobject.txt. The full path cannot contain the bucket name.
	objectName := "exampledir/exampleobject.txt"
	// Specify the version ID of the object.
	versionId := "CAEQMxiBgICAof2D0BYiIDJhMGE3N2M1YTI1NDQzOGY5NTkyNTI3MGYyMzJm****"

	// Obtain the bucket.
	bucket, err := client.Bucket(bucketName)
	if err != nil {
		HandleError(err)
	}

	// Delete the tags from the specified version of the object.
	err = bucket.DeleteObjectTagging(objectName, oss.VersionId(versionId))

	if err != nil {
		fmt.Println("Error:", err)
		os.Exit(-1)
	}
	fmt.Println("delete object tagging success.")
}