Obtenha o conteúdo do arquivo do Amazon S3 Glacier e exclua o arquivo usando um AWS SDK

O exemplo de código a seguir mostra como:

• Listar trabalhos para um cofre do Amazon S3 Glacier e obter o status do trabalho.

• Obter a saída de um trabalho de recuperação de arquivo concluído.

• Excluir um arquivo.

• Exclua um cofre.

Python

SDK para Python (Boto3).

nota

Há mais no GitHub. Encontre o exemplo completo e saiba como configurar e executar no Repositório de exemplos de código da AWS.

Crie uma classe que envolva operações do S3 Glacier.

import argparse
import logging
import os
import boto3
from botocore.exceptions import ClientError

logger = logging.getLogger(__name__)


class GlacierWrapper:
    """Encapsulates Amazon S3 Glacier API operations."""

    def __init__(self, glacier_resource):
        """
        :param glacier_resource: A Boto3 Amazon S3 Glacier resource.
        """
        self.glacier_resource = glacier_resource


    @staticmethod
    def list_jobs(vault, job_type):
        """
        Lists jobs by type for the specified vault.

        :param vault: The vault to query.
        :param job_type: The type of job to list.
        :return: The list of jobs of the requested type.
        """
        job_list = []
        try:
            if job_type == "all":
                jobs = vault.jobs.all()
            elif job_type == "in_progress":
                jobs = vault.jobs_in_progress.all()
            elif job_type == "completed":
                jobs = vault.completed_jobs.all()
            elif job_type == "succeeded":
                jobs = vault.succeeded_jobs.all()
            elif job_type == "failed":
                jobs = vault.failed_jobs.all()
            else:
                jobs = []
                logger.warning("%s isn't a type of job I can get.", job_type)
            for job in jobs:
                job_list.append(job)
                logger.info("Got %s %s job %s.", job_type, job.action, job.id)
        except ClientError:
            logger.exception("Couldn't get %s jobs from %s.", job_type, vault.name)
            raise
        else:
            return job_list


    @staticmethod
    def get_job_output(job):
        """
        Gets the output of a job, such as a vault inventory or the contents of an
        archive.

        :param job: The job to get output from.
        :return: The job output, in bytes.
        """
        try:
            response = job.get_output()
            out_bytes = response["body"].read()
            logger.info("Read %s bytes from job %s.", len(out_bytes), job.id)
            if "archiveDescription" in response:
                logger.info(
                    "These bytes are described as '%s'", response["archiveDescription"]
                )
        except ClientError:
            logger.exception("Couldn't get output for job %s.", job.id)
            raise
        else:
            return out_bytes


    @staticmethod
    def delete_archive(archive):
        """
        Deletes an archive from a vault.

        :param archive: The archive to delete.
        """
        try:
            archive.delete()
            logger.info(
                "Deleted archive %s from vault %s.", archive.id, archive.vault_name
            )
        except ClientError:
            logger.exception("Couldn't delete archive %s.", archive.id)
            raise


    @staticmethod
    def delete_vault(vault):
        """
        Deletes a vault.

        :param vault: The vault to delete.
        """
        try:
            vault.delete()
            logger.info("Deleted vault %s.", vault.name)
        except ClientError:
            logger.exception("Couldn't delete vault %s.", vault.name)
            raise

Chame funções na classe wrapper para obter o conteúdo de arquivo de um trabalho concluído e, em seguida, exclua o arquivo.

def retrieve_demo(glacier, vault_name):
    """
    Shows how to:
    * List jobs for a vault and get job status.
    * Get the output of a completed archive retrieval job.
    * Delete an archive.
    * Delete a vault.

    :param glacier: A Boto3 Amazon S3 Glacier resource.
    :param vault_name: The name of the vault to query for jobs.
    """
    vault = glacier.glacier_resource.Vault("-", vault_name)
    try:
        vault.load()
    except ClientError as err:
        if err.response["Error"]["Code"] == "ResourceNotFoundException":
            print(
                f"\nVault {vault_name} doesn't exist. You must first run this script "
                f"with the --upload flag to create the vault."
            )
            return
        else:
            raise

    print(f"\nGetting completed jobs for {vault.name}.")
    jobs = glacier.list_jobs(vault, "completed")
    if not jobs:
        print("\nNo completed jobs found. Give it some time and try again later.")
        return

    retrieval_job = None
    for job in jobs:
        if job.action == "ArchiveRetrieval" and job.status_code == "Succeeded":
            retrieval_job = job
            break
    if retrieval_job is None:
        print(
            "\nNo ArchiveRetrieval jobs found. Give it some time and try again "
            "later."
        )
        return

    print(f"\nGetting output from job {retrieval_job.id}.")
    archive_bytes = glacier.get_job_output(retrieval_job)
    archive_str = archive_bytes.decode("utf-8")
    print("\nGot archive data. Printing the first 10 lines.")
    print(os.linesep.join(archive_str.split(os.linesep)[:10]))

    print(f"\nDeleting the archive from {vault.name}.")
    archive = glacier.glacier_resource.Archive(
        "-", vault.name, retrieval_job.archive_id
    )
    glacier.delete_archive(archive)

    print(f"\nDeleting {vault.name}.")
    glacier.delete_vault(vault)

• Para obter detalhes da API, consulte os tópicos a seguir na Referência da API AWS SDK para Python (Boto3).

  • DeleteArchive

  • DeleteVault

  • GetJobOutput

  • ListJobs

Para ver uma lista completa dos Guias do desenvolvedor de SDK da AWS e exemplos de código, consulte Como usar o S3 Glacier com um AWS SDK. Este tópico também inclui informações sobre como começar e detalhes sobre versões anteriores do SDK.