Excluir objetos usando o OSS SDK for Go 1.0 - Object Storage Service: Central de Documentação do Alibaba Cloud

Exclua um único objeto, vários objetos por nome, objetos que correspondam a um prefixo ou um diretório inteiro.

Aviso

Não é possível recuperar objetos excluídos. Prossiga com cuidado.

Observações

Neste tópico, utilizamos o endpoint público da região China (Hangzhou). Para acessar o OSS a partir de outro service da Alibaba Cloud na mesma região do OSS, utilize um endpoint interno. Para obter mais informações sobre as regiões e endpoints do OSS, consulte Regions and endpoints.
Neste tópico, as credenciais de acesso são obtidas a partir de variáveis de ambiente. Para obter mais informações sobre como configurar as credenciais de acesso, consulte Configure access credentials.
Este tópico demonstra como criar uma instância OSSClient com um endpoint do OSS. Para configurações alternativas, como o uso de um domínio personalizado ou autenticação com credenciais do Security Token Service (STS), consulte Configure a client (Go SDK V1).
Para excluir um objeto, você deve ter a permissão oss:DeleteObject. Para obter mais informações, consulte Grant a custom policy.

Excluir um único objeto

O código a seguir exclui um objeto chamado exampleobject.txt de um bucket chamado examplebucket:

package main

import (
	"log"

	"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 {
		log.Fatalf("Failed to create credentials provider: %v", err)
	}

	// Create an OSSClient instance. 
	// 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. 
	// 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. Specify the actual region.
	clientOptions := []oss.ClientOption{oss.SetCredentialsProvider(&provider)}
	clientOptions = append(clientOptions, oss.Region("yourRegion"))
	// Specify the version of the signature algorithm.
	clientOptions = append(clientOptions, oss.AuthVersion(oss.AuthV4))
	client, err := oss.New("yourEndpoint", "", "", clientOptions...)
	if err != nil {
		log.Fatalf("Failed to create OSS client: %v", err)
	}

	// Specify the name of the bucket. Example: examplebucket. 
	bucketName := "examplebucket"
	// Set objectName to the full path of the object that you want to delete. The full path must contain the extension of the object name but cannot contain the bucket name. Example: exampledir/exampleobject.txt. 
	// If you want to delete a directory, set objectName to the directory name. If the directory contains objects, you must delete all objects from the directory before you can delete the directory. 
	objectName := "exampledir/exampleobject.txt"

	// Create a bucket.
	bucket, err := client.Bucket(bucketName)
	if err != nil {
		log.Fatalf("Failed to get bucket '%s': %v", bucketName, err)
	}

	// Delete the object. 
	err = bucket.DeleteObject(objectName)
	if err != nil {
		log.Fatalf("Failed to delete object '%s': %v", objectName, err)
	}

	log.Printf("Successfully deleted object: %s\n", objectName)
}

Excluir vários objetos

É possível excluir até 1.000 objetos por vez por nome, prefixo ou diretório.

Também é possível configurar regras de ciclo de vida para excluir objetos automaticamente. Para obter mais informações, consulte Lifecycle rules based on last modification time.

Excluir objetos por nome

Código de exemplo para excluir vários objetos por nome:

package main

import (
	"log"

	"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 {
		log.Fatalf("Failed to create credentials provider: %v", err)
	}

	// Create an OSSClient instance. 
	// 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. 
	// 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. Specify the actual region.
	clientOptions := []oss.ClientOption{oss.SetCredentialsProvider(&provider)}
	clientOptions = append(clientOptions, oss.Region("yourRegion"))
	// Specify the version of the signature algorithm.
	clientOptions = append(clientOptions, oss.AuthVersion(oss.AuthV4))
	client, err := oss.New("yourEndpoint", "", "", clientOptions...)
	if err != nil {
		log.Fatalf("Failed to create OSS client: %v", err)
	}

	// Specify the name of the bucket. Example: examplebucket. 
	bucketName := "examplebucket"

	// Create a bucket.
	bucket, err := client.Bucket(bucketName)
	if err != nil {
		log.Fatalf("Failed to get bucket '%s': %v", bucketName, err)
	}

	// Delete multiple objects and the result is returned.
	objectsToDelete := []string{"my-object-1", "my-object-2"}
	delRes, err := bucket.DeleteObjects(objectsToDelete)
	if err != nil {
		log.Fatalf("Failed to delete objects: %v", err)
	}
	log.Printf("Deleted Objects: %v\n", delRes.DeletedObjects)

	// Delete multiple objects and the result is not returned.
	objectsToDeleteQuiet := []string{"my-object-3", "my-object-4"}
	_, err = bucket.DeleteObjects(objectsToDeleteQuiet, oss.DeleteObjectsQuiet(true))
	if err != nil {
		log.Fatalf("Failed to delete objects (quiet): %v", err)
	}
	log.Println("Objects deleted quietly")
}

Excluir objetos por prefixo ou diretório

Código de exemplo para excluir objetos por prefixo de nome ou para excluir um diretório inteiro e seu conteúdo.

Aviso

Caso não especifique o prefixo ou o defina como NULL, todos os objetos do bucket serão excluídos. Especifique o prefixo com cuidado durante uma operação de exclusão.

package main

import (
	"log"

	"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 {
		log.Fatalf("Failed to create credentials provider: %v", err)
	}

	// Create an OSSClient instance. 
	// 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. 
	// 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. Specify the actual region.
	clientOptions := []oss.ClientOption{oss.SetCredentialsProvider(&provider)}
	clientOptions = append(clientOptions, oss.Region("yourRegion"))
	// Specify the version of the signature algorithm.
	clientOptions = append(clientOptions, oss.AuthVersion(oss.AuthV4))
	client, err := oss.New("yourEndpoint", "", "", clientOptions...)
	if err != nil {
		log.Fatalf("Failed to create OSS client: %v", err)
	}

	// Specify the name of the bucket. Example: examplebucket. 
	bucket, err := client.Bucket("examplebucket")
	if err != nil {
		log.Fatalf("Failed to get bucket: %v", err)
	}

	// List all objects whose names contain the specified prefix and delete the objects. 
	marker := oss.Marker("")
	// Specify the prefix of the names of the objects that you want to delete. If you want to delete all objects whose names contain the src prefix, set the prefix to src. After you set the prefix to src, all non-directory objects whose names contain the src prefix, the src directory, and all objects in the src directory are deleted.
	prefix := oss.Prefix("src")
	// If you want to delete only the src directory and all objects in the directory, set the prefix to src/. 
	// prefix := oss.Prefix("src/")
	var totalDeleted int

	for {
		lor, err := bucket.ListObjects(marker, prefix)
		if err != nil {
			log.Fatalf("Failed to list objects: %v", err)
		}

		objects := make([]string, len(lor.Objects))
		for i, object := range lor.Objects {
			objects[i] = object.Key
		}

		// Delete the objects.
		delRes, err := bucket.DeleteObjects(objects, oss.DeleteObjectsQuiet(true))
		if err != nil {
			log.Fatalf("Failed to delete objects: %v", err)
		}

		if len(delRes.DeletedObjects) > 0 {
			log.Fatalf("Some objects failed to delete: %v", delRes.DeletedObjects)
		}

		totalDeleted += len(objects)

		// Update the marker.
		marker = oss.Marker(lor.NextMarker)
		if !lor.IsTruncated {
			break
		}
	}

	log.Printf("Success, total deleted object count: %d\n", totalDeleted)
}

Referências

Código de exemplo completo para excluir objetos: GitHub.
Para obter mais informações sobre a operação de API usada para excluir um objeto, consulte DeleteObject.
Referência de API para excluir vários objetos: DeleteObjects.