Object Storage Service:How can I avoid being charged for the storage usage of objects that are stored for less than the minimum storage duration?

Java

import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.common.auth.CredentialsProviderFactory;
import com.aliyun.oss.common.auth.EnvironmentVariableCredentialsProvider;
import com.aliyun.oss.common.utils.DateUtil;
import com.aliyun.oss.model.ObjectMetadata;
import com.aliyun.oss.model.HeadObjectRequest;
import com.aliyuncs.exceptions.ClientException;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

public class Demo {

    public static void main(String[] args) throws ClientException {
        // Specify the endpoint of the region in which the bucket is located. 
        String endpoint = "https://oss-cn-hangzhou.aliyuncs.com";
        // 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. 
        EnvironmentVariableCredentialsProvider credentialsProvider = CredentialsProviderFactory.newEnvironmentVariableCredentialsProvider();
        // Specify the name of the bucket. 
        String bucketName = "examplebucket";

        // Create an OSSClient instance. 
        OSS ossClient = new OSSClientBuilder().build(endpoint, credentialsProvider);

        // Specify the full path of the object. 
        String[] objectNames = {"example.txt"};

        // The mapping between the storage class and the minimum storage duration. Unit: days. 
        Map<String, Integer> minimumRetentionPeriod = new HashMap<>();
        minimumRetentionPeriod.put("Standard", 0);
        minimumRetentionPeriod.put("IA", 30);
        minimumRetentionPeriod.put("Archive", 60);
        minimumRetentionPeriod.put("ColdArchive", 180);
        minimumRetentionPeriod.put("DeepColdArchive", 180);

        for (String objectName : objectNames) {
            objectName = objectName.trim();
            try {
                // Query object metadata. 
                HeadObjectRequest headObjectRequest = new HeadObjectRequest(bucketName, objectName);
                ObjectMetadata objectMetadata = ossClient.headObject(headObjectRequest);

                // Query the storage class and last modified time of the object. 
                String storageClass = String.valueOf(objectMetadata.getObjectStorageClass());
                String lastModifiedStr = objectMetadata.getLastModified().toString();
                Date lastModified = objectMetadata.getLastModified();

                if ("ColdArchive".equals(storageClass) || "DeepColdArchive".equals(storageClass)) {
                    Object transitionTimeObj = objectMetadata.getRawMetadata().get("x-oss-transition-time");
                    String transitionTimeStr = String.valueOf(transitionTimeObj);
                    Date transitionTime = DateUtil.parseRfc822Date(transitionTimeStr);

                    if (transitionTime != null) {
                        lastModified = transitionTime;
                    } else {
                        throw new Exception(Storage class of "Object '" + objectName + '": "+ storageClass
                                + ", x-oss-transition-time" + transitionTimeStr + ". ");
                    }
                }

                // Query the current time. 
                Date currentTime = new Date();

                // Calculate the storage duration of the object. Unit: days. 
                long storageDuration = (currentTime.getTime() - lastModified.getTime()) / (1000 * 60 * 60 * 24);

                // Display the object information. 
                System.out.println("Object name: " + objectName);
                System.out.println("Storage class: " + storageClass);
                System.out.println("Created at: " + lastModifiedStr);
                System.out.println("Storage duration: " + storageDuration + "Day");

                // Determine whether the object meets the minimum storage duration requirements. 
                if (minimumRetentionPeriod.containsKey(storageClass)) {
                    int minRetention = minimumRetentionPeriod.get(storageClass);
                    if (storageDuration < minRetention) {
                        int daysRemaining = minRetention - (int) storageDuration;
                        System.out.println(objectName + " does not meet the minimum storage duration requirements. The object needs to be stored for another " + daysRemining + " days. If you delete the object, you are charged"
                                + daysRemining + " days of the storage usage for the object that is stored for less than the minimum storage duration.");
                    } else {
                        int daysExceeded = (int) storageDuration - minRetention;
                        System.out.println(objectName + " meets the minimum storage duration requirements. The object is stored " + daysExceeded + " days more than the minimum storage duration. You are not charged for the storage usage for the object that is stored for less than the minimum storage duration.");
                    }
                } else {
                    System.out.println(The storage class of the objectName + " is not recognized.");
                }
                System.out.println("----------------------------------------"); // The delimiter.
            } catch (Exception e) {
                e.printStackTrace();
                System.out.println("An error occurred when I query the metadata of" + objectName + ": " + e.getMessage());
                System.out.println("----------------------------------------"); // The delimiter.
            }
        }

        // Shut down the OSSClient instance. 
        ossClient.shutdown();
    }
}

Python

import datetime
import oss2
from oss2.credentials import EnvironmentVariableCredentialsProvider

# 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. 
auth = oss2.ProviderAuth(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. 
# Specify the name of the bucket. 
bucket = oss2.Bucket(auth, 'https://oss-cn-hangzhou.aliyuncs.com', 'examplebucket')
# Specify the full path of the single object. 
object_names = ['example.txt']

# The mapping between the storage class and the minimum storage duration. Unit: days. 
minimum_retention_period = {
    'Standard': 0,
    'IA': 30,
    'Archive': 60,
    'ColdArchive': 180,
    'DeepColdArchive': 180
}

for object_name in object_names:
    object_name = object_name.strip()

    try:
        # Query all object metadata by using the head_object method. 
        object_info = bucket.head_object(object_name)

        # Query the storage class and last modified time of the object. 
        storage_class = object_info.headers['x-oss-storage-class']
        last_modified = object_info.headers['Last-Modified']

        # Change the last modified time to the datetime object. 
        last_modified_time = datetime.datetime.strptime(last_modified, '%a, %d %b %Y %H:%M:%S GMT')

        transition_time_str = object_info.headers.get('x-oss-transition-time')
        transition_time = None
        if storage_class == 'ColdArchive' or storage_class == 'DeepColdArchive':
            if transition_time_str:
                last_modified_time = datetime.datetime.strptime(transition_time_str, "%a, %d %b %Y %H:%M:%S %Z")
            else:
                raise Exception(f"Storage class of '{object_name}': {storage_class}. x-oss-transition-time: {transition_time_str}.")


        # Query the current time. 
        current_time = datetime.datetime.now()

        # Calculate the storage duration of the object. Unit: days. 
        storage_duration = (current_time - last_modified_time).days

        # Display the object information. 
        print(f "Object name: {object_name}")
        print(f "Storage class: {storage_class}")
        print(f "Created at: {last_modified}")
        print(f "Storage duration: {storage_duration} days")

        # Determine whether the object meets the minimum storage duration requirements. 
        if storage_class in minimum_retention_period:
            min_retention = minimum_retention_period[storage_class]
            if storage_duration < min_retention:
                days_remaining = min_retention - storage_duration
                print(f"{object_name} does not meet the minimum storage duration requirements. The object needs to be stored for another {days_remaining} days. If you delete the object, you are charged {days_remaining} days of the storage usage for the object that is stored for less than the minimum storage duration.")
            else:
                days_exceeded = storage_duration - min_retention
                print(f"{object_name} meets the minimum storage duration requirements. The object is stored {days_exceeded} days more than the minimum storage duration. You are not charged for the storage usage for the object that is stored for less than the minimum storage duration.")
        else:
            print(f"The storage class of {object_name} is not recognized.")

        print("-" * 40) # The delimiter.

    except Exception as e:
        print(f "An error occurred when I query the metadata of {object_name}: {str(e)}")
        print("-" * 40) # The delimiter 

Node.js

const OSS = require("ali-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 are configured. 
const config = {
  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 the bucket is located in the China (Hangzhou) region, set the region to oss-cn-hangzhou. 
  region: "oss-cn-hangzhou",
  // Specify the name of the bucket. 
  bucket: "examplebucket",
};
const client = new OSS(config);

// The mapping between the storage class and the minimum storage duration. Unit: days. 
const minimum_retention_period = {
  Standard: 0,
  IA: 30,
  Archive: 60,
  ColdArchive: 180,
  DeepColdArchive: 180,
};

// Calculate the time difference in days. 
function getDays(date1, date2) {
  if (!(date1 instanceof Date) || !(date2 instanceof Date)) {
    throw new Error("Need to pass valid Date objects");
  }
  const timestamp1 = date1.getTime();
  const timestamp2 = date2.getTime();
  const diffInMilliseconds = Math.abs(timestamp2 - timestamp1);
  const diffInDays = diffInMilliseconds / (1000 * 60 * 60 * 24);

  return Math.round(diffInDays);
}

// Specify the full path of the object. 
const object_names = ["example.jpg"];

(async () => {
  for (const object_name of object_names) {
    try {
      // Query all metadata of the object by using the head method. 
      const object_info = await client.head(object_name);
      const { headers } = object_info.res;

      // Query the storage class and last modified time of the object. 
      const storage_class = headers["x-oss-storage-class"];
      const last_modified = headers["last-modified"];

      let last_modified_time = new Date(last_modified);
      const transition_time_str = headers["x-oss-transition-time"];
      if (["ColdArchive", "DeepColdArchive"].includes(storage_class)) {
        if (transition_time_str)
          last_modified_time = new Date(transition_time_str);
        else {
          const errorStr = Storage class of 'Object '${object_name}': ${storage_class}. x-oss-transition-time: ${transition_time_str}. x-oss-transition-time is available only for objects whose storage class is converted to Cold Archive or Deep Cold Archive based on lifecycle rules.
          throw new Error(errorStr);
        }
      }

      const current_time=new Date(); // Query the current time. 
      const storage_duration=getDays (current_time, last_modified_time); // Calculate the storage duration of the object. Unit: days. 
      // Display the object information. 
      console.log ('Object name: ${object_name}');
      console.log ('Storage class: ${storage_class}');
      console.log ('Created at: ${last_modified}');
      console.log ('Storage duration: ${storage_duration} days ');

      // Determine whether the object meets the minimum storage duration requirements. 
      if (Object.keys(minimum_retention_period).includes(storage_class)) {
        min_retention = minimum_retention_period[storage_class];
        if (storage_duration < min_retention) {
          const days_remaining = min_retention - storage_duration;
          console.log(
            '${object_name} does not meet the minimum storage duration requirements. The object needs to be stored for another ${days_remaining} days. If you delete the object, you are charged ${days_remaining} days of the storage usage for the object that is stored for less than the minimum storage duration. `
          );
        } else {
          const days_exceeded = storage_duration - min_retention;
          console.log(
            '${object_name} meets the minimum storage duration requirements. The object is stored ${days_exceeded} days more than the minimum storage duration. You are not charged for the storage usage for the object that is stored for less than the minimum storage duration. `
          );
        }
      } else console.log(The storage class of the '${object_name} is not recognized. `);
    } catch (e) {
      console.log ('An error occurred when I query the metadata of ${object_name}:', e);
    }
  }
})();

PHP

<?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;

// 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 = 'http://oss-cn-hangzhou.aliyuncs.com';
// Specify the name of the bucket. 
$bucketName = 'examplebucket';

// Create an OSSClient instance. 
try {
    // 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 = new EnvironmentVariableCredentialsProvider();
    $config = array(
        "provider" => $provider,
        "endpoint" => $endpoint,
    );
    $ossClient = new OssClient($config);
	// Specify the full path of the object. 
    $objectNames = ['example.txt'];
    $minimumRetentionPeriod = [
        'Standard' => 0,
        'IA' => 30,
        'Archive' => 60,
        'ColdArchive' => 180,
        'DeepColdArchive' => 180,
    ];

    foreach ($objectNames as $objectName) {
        $objectName = trim($objectName);
        try {
            // Query all metadata of an object by using the headObject method. 
            $objectInfo = $ossClient->getObjectMeta($bucketName, $objectName);

            // Query the storage class and last modified time of the object. 
            $storageClass = $objectInfo['x-oss-storage-class'];
            $lastModified = $objectInfo['last-modified'];

            // Convert the last modified time of the object to a timestamp. 
            $lastModifiedTime = strtotime($lastModified);

            if (in_array($storageClass, array("ColdArchive", "DeepColdArchive")) && isset($objectInfo["x-oss-transition-time"])) {
                $lastModifiedTime = strtotime($objectInfo["x-oss-transition-time"]);
            }

            // Query the current time. 
            $currentTime = time();

            // Calculate the storage duration of the object. Unit: days. 
            $storageDuration = floor(($currentTime - $lastModifiedTime) / (60 * 60 * 24));

            // Display the object information. 
            echo "Object name: $objectName\n";
            echo "Storage class: $storageClass\n";
            echo "Created at: $lastModified\n";
            echo "Storage duration: $storageDuration days\n";

            // Determine whether the object meets the minimum storage duration requirements. 
            if (isset($minimumRetentionPeriod[$storageClass])) {
                $minRetention = $minimumRetentionPeriod[$storageClass];
                if ($storageDuration < $minRetention) {
                    $daysRemaining = $minRetention - $storageDuration;
                    echo "$objectName does not meet the minimum storage duration requirements. The object needs to be stored for another $daysRemaining days. If you delete the object, you are charged $daysRemaining days of the storage usage for the object that is stored for less than the minimum storage duration. \n";
                } else {
                    $daysExceeded = $storageDuration - $minRetention;
                    System.out.println(echo "$objectName meets the minimum storage duration requirements. The object is stored $daysExceeded days more than the minimum storage duration. You are not charged for the storage usage for the object that is stored for less than the minimum storage duration. \n";
                }
            } else {
                The storage class of echo "$objectName is not recognized. \n";
            }
            echo str_repeat("-", 40) . "\n"; // The delimiter.
        } catch (OssException $e) {
            echo "An error occurred when I query the metadata of $objectName: " . $e->getMessage() . "\n";
            echo str_repeat("-", 40) . "\n"; // The delimiter.
        }
    }
} catch (OssException $e) {
    printf(__FUNCTION__ . ": FAILED\n");
    printf($e->getMessage() . "\n");
    return;
}

Go

package main

import (
	"context"
	"fmt"
	"log"
	"net/http"
	"strings"
	"time"

	"github.com/aliyun/alibabacloud-oss-go-sdk-v2/oss"
	"github.com/aliyun/alibabacloud-oss-go-sdk-v2/oss/credentials"
)

func main() {
	cfg := oss.LoadDefaultConfig().
		WithCredentialsProvider(credentials.NewEnvironmentVariableCredentialsProvider()).
		WithRegion("cn-hangzhou").
		WithEndpoint("https://oss-cn-hangzhou.aliyuncs.com")
	client := oss.NewClient(cfg)
	// Specify the full path of the object. 
	objectNames := []string{"example.txt"}
	minimumRetentionPeriod := map[string]int{
		"Standard":        0,
		"IA":              30,
		"Archive":         60,
		"ColdArchive":     180,
		"DeepColdArchive": 180,
	}
        // Specify the name of the bucket. 
	bucketName := "examplebucket"
	for _, objectName := range objectNames {
		objectName = strings.Trim(objectName, " ")
		objectInfo, err := client.HeadObject(context.TODO(), &oss.HeadObjectRequest{
			Bucket: oss.Ptr(bucketName),
			Key:    oss.Ptr(objectName),
		})
		if err != nil {
			log.Printf("An error occurred when I query the metadata of %s: %v\n", objectName, err)
			continue
		}

		storageClass := objectInfo.StorageClass
		currentTime := time.Now().Unix()
		storageDuration := (currentTime - objectInfo.LastModified.Unix()) / 60 / 60 / 24
		if *storageClass == "ColdArchive" || *storageClass == "DeepColdArchive" {
			if objectInfo.Headers.Get("x-oss-transition-time") != "" {
				transitionTime, err := time.Parse(http.TimeFormat, objectInfo.Headers.Get("x-oss-transition-time"))
				if err != nil {
					fmt.Printf("Failed to parse %s x-oss-transition-time: %v\n", objectName, err)
					continue
				}
				storageDuration = (currentTime - transitionTime.Unix()) / 60 / 60 / 24
			}
		}

		fmt.Printf("Object name: %s\n", objectName)
		fmt.Printf("Storage class: %s\n", *storageClass)
		fmt.Printf("Created at: %s\n", *objectInfo. LastModified)
		fmt.Printf("Storage duration: %d days\n", storageDuration)

		if minimumRetentionPeriod[*storageClass] != 0 {
			minRetention := minimumRetentionPeriod[*storageClass]
			daysRemaining := minRetention - int(storageDuration)
			fmt.Printf("%s doe not meet the minimum storage duration requirements. The object needs to be stored for another %d days. If you delete the object, you are charged %d days of the storage usage for the object that is stored for less than the minimum storage duration. \n", objectName, daysRemaining, daysRemaining)
		} else {
			fmt.Printf(The storage class of "%s is not recognized. \n", objectName)
		}
	}
}