Object Storage Service:Object tagging and lifecycle management (Go SDK V1)

The following code shows how to add a tag matching rule to a lifecycle rule:

package main

import (
	"fmt"
	"os"

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

func main() {
	// Obtain access credentials from environment variables. Before you run this sample code, make sure that the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables are set.
	provider, err := oss.NewEnvironmentVariableCredentialsProvider()
	if err != nil {
		fmt.Println("Error:", err)
		os.Exit(-1)
	}
	// Create an OSSClient instance.
	// Replace yourEndpoint with 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.
	// Replace yourRegion with 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)
	}

	// Set the ID of the lifecycle rule to "rule1" and apply the rule to objects that have the "one" prefix.
	// Objects with this prefix are converted to the IA storage class after 3 days and to the Archive storage class after 30 days.
	transitionIA := oss.LifecycleTransition{
		Days:         3,
		StorageClass: oss.StorageIA,
	}
	transitionArch := oss.LifecycleTransition{
		Days:         30,
		StorageClass: oss.StorageArchive,
	}

	// Set the object tagging.
	tag1 := oss.Tag{
		Key:   "key1",
		Value: "value1",
	}
	tag2 := oss.Tag{
		Key:   "key2",
		Value: "value2",
	}

	// Set the lifecycle rule for the bucket. The lifecycle rule contains the configured object tagging information.
	rule1 := oss.LifecycleRule{
		ID:          "rule1",
		Prefix:      "one",
		Status:      "Enabled",
		Transitions: []oss.LifecycleTransition{transitionIA, transitionArch},
		Tags:        []oss.Tag{tag1, tag2},
	}
	rules := []oss.LifecycleRule{rule1}
	// Replace yourBucketName with the name of the bucket.
	err = client.SetBucketLifecycle("yourBucketName", rules)
	if err != nil {
		fmt.Println("Error:", err)
		os.Exit(-1)
	}
}

The following code shows how to view the tag information in a lifecycle rule:

package main

import (
	"fmt"
	"os"

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

func main() {
	// Obtain access credentials from environment variables. Before you run this sample code, make sure that the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables are set.
	provider, err := oss.NewEnvironmentVariableCredentialsProvider()
	if err != nil {
		fmt.Println("Error:", err)
		os.Exit(-1)
	}
	// Create an OSSClient instance.
	// Replace yourEndpoint with 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.
	// Replace yourRegion with 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)
	}

	// Obtain the lifecycle rules of the bucket.
	// Replace yourBucketName with the name of the bucket.
	lc, err := client.GetBucketLifecycle("yourBucketName")
	if err != nil {
		fmt.Println("Error:", err)
		os.Exit(-1)
	}

	// Print the lifecycle information, which includes the object tagging information.
	for i, v := range lc.Rules {
		fmt.Printf("Bucket %d Lifecycle: %v", i, v)
		if v.Expiration != nil {
			fmt.Printf(", Expiration:%v", *v.Expiration)
		}
		fmt.Printf("\n")
	}
}