如何使用AWSS3SDK访问OSS_对象存储(OSS)-阿里云帮助中心

对象存储 OSS 提供了兼容 Amazon S3 的 API。当您将数据从 Amazon S3 迁移到 OSS 后，只需简单的配置修改，即可让您的客户端应用轻松兼容 OSS 服务。本文主要介绍如何通过不同开发平台的 S3 SDK 完成初始化配置，然后使用 S3 SDK 接口访问 OSS 资源。

前提条件

已创建 RAM 用户并获取访问密钥（AccessKey）。具体操作，请参见创建 RAM 用户。
为已创建的 RAM 用户授予系统权限或自定义权限。
- 系统权限
  
  您可以为 RAM 用户授予管理 OSS 的权限 AliyunOSSFullAccess 或者只读访问 OSS 的权限 AliyunOSSReadOnlyAccess 。
- 自定义权限
  
  您还可以结合业务场景，通过创建自定义权限实现 OSS 的细粒度权限控制。更多信息，请参见 RAM Policy 常见示例。
已创建集成了 S3 SDK 且能正常运行的客户端应用。

使用限制

仅支持使用 Amazon S3 SDK 兼容的标准内外网域名访问公共云 OSS 有地域属性的 Bucket。

背景信息

以中国香港地域为例，S3 兼容的外网 Endpoint 格式为 s3.oss-cn-hongkong.aliyuncs.com ，S3 兼容的内网 Endpoint 格式为 s3.oss-cn-hongkong-internal.aliyuncs.com 。如需使用其他地域，请对应替换 Endpoint 中的 Region ID。关于 Region 和 Endpoint 的对应关系，请参见 OSS 地域和访问域名。

Java SDK

        // 通过环境变量传递临时访问凭证信息。
        String accessKeyId = System.getenv().get("OSS_AccessKeyId");;
        String accessKeySecret = System.getenv().get("OSS_AccessKeySecret");;
        String sessionToken = System.getenv().get("OSS_SessionToken");;
        AmazonS3 s3Client = AmazonS3ClientBuilder.standard()
                .withCredentials(new AWSStaticCredentialsProvider(new BasicSessionCredentials(accessKeyId, accessKeySecret, sessionToken)))
                .withEndpointConfiguration(new AwsClientBuilder.EndpointConfiguration(
                        "https://oss-cn-hongkong.aliyuncs.com",
                .withPathStyleAccessEnabled(false)
                .withChunkedEncodingDisabled(true)
                .build();

[default]
aws_access_key_id = [OSS_AccessKeyId]
aws_secret_access_key = [OSS_AccessKeySecret]
aws_secret_sessiontoken = [OSS_SessionToken]

AmazonS3 s3Client = AmazonS3ClientBuilder.standard()
        .withEndpointConfiguration(new AwsClientBuilder.EndpointConfiguration(
                "https://oss-cn-hongkong.aliyuncs.com",
        .withPathStyleAccessEnabled(false)
        .withChunkedEncodingDisabled(true)
        .build();

        // 通过环境变量传递临时访问凭证信息。
        String accessKeyId = System.getenv().get("OSS_AccessKeyId");;
        String accessKeySecret = System.getenv().get("OSS_AccessKeySecret");;
        String sessionToken = System.getenv().get("OSS_SessionToken");;
        S3Client s3 = S3Client.builder()
                .credentialsProvider(StaticCredentialsProvider.create(AwsSessionCredentials.create(accessKeyId, accessKeySecret, sessionToken)))
                .region(Region.AWS_GLOBAL)
                .endpointOverride(URI.create("http://s3.oss-us-west-1.aliyuncs.com"))
                .serviceConfiguration(S3Configuration.builder()
                        .pathStyleAccessEnabled(false)
                        .chunkedEncodingEnabled(false)
                        .build())
                .build();

import boto3
import os
from botocore.config import Config
endpoint = 'https://oss-cn-hongkong.aliyuncs.com'
# 通过环境变量传递临时访问凭证信息。
access_key_id = os.getenv('OSS_AccessKeyId')
secret_access_key = os.getenv('OSS_AccessKeySecret')
session_token = os.getenv('OSS_SessionToken')
s3 = boto3.client(
    's3',
    aws_access_key_id=access_key_id,
    aws_secret_access_key=secret_access_key,
    aws_session_token=session_token,
    endpoint_url=endpoint,
    config=Config(s3={"addressing_style": "virtual"},
                      signature_version='v4'))

1. ```
[default]
addressing_style = virtual
```
2. ```
[default]
aws_access_key_id = [OSS_AccessKeyId]
aws_secret_access_key = [OSS_AccessKeySecret]
aws_secret_sessiontoken = [OSS_SessionToken]
```

<?php
require_once __DIR__ . '/vendor/autoload.php';
use Aws\Credentials\CredentialProvider;
use Aws\Credentials\Credentials;
use Aws\S3\S3Client;
$provider = CredentialProvider::fromCredentials(new Credentials(
    getenv('OSS_ACCESS_KEY_ID'),
    getenv('OSS_ACCESS_KEY_SECRET'),
    getenv('OSS_SESSION_TOKEN')
// 创建S3客户端。
$s3Client = new S3Client([
    'region' => 'oss-cn-hangzhou',
    'version' => '2006-03-01',
    'endpoint' => 'http://oss-cn-hangzhou.aliyuncs.com',
    'credentials' => $provider
]);

const S3 = require("@aws-sdk/client-s3");
const { S3Client, PutObjectCommand } = S3;
// 初始化S3客户端。
const region = "oss-cn-chengdu";
const s3Client = new S3Client({
  region,
  endpoint: `https://${region}.aliyuncs.com`,
  credentials: {
    accessKeyId: process.env.AccessKeyId,
    secretAccessKey: process.env.AccessKeySecret,
    sessionToken: process.env.SecurityToken,
// 使用客户端执行操作，例如上传文件。
async function uploadObject() {
  const command = new PutObjectCommand({
    // 填写Bucket名称。
    Bucket: "yourbucket", 
    // 填写OSS文件完整路径和本地文件的完整路径。OSS文件完整路径中不能包含Bucket名称。
    Key: "file.txt",
    // 指定文件内容或Buffer。
    Body: "Hello from AWS SDK v3!",
  try {
    const response = await s3Client.send(command);
    console.log("Object uploaded successfully", response);
  } catch (error) {
    console.error("Error uploading object:", error);
uploadObject();

string sAccessKeyId = Environment.GetEnvironmentVariable("OSS_ACCESS_KEY_ID");
string sAccessKeySecret = Environment.GetEnvironmentVariable("OSS_ACCESS_KEY_SECRET");
string sToken = Environment.GetEnvironmentVariable("OSS_SESSION_TOKEN");
string endpoint = "https://oss-cn-hangzhou.aliyuncs.com";
var config = newAmazonS3Config(){ServiceURL=endpoint};
var client = new AmazonS3Client(sAccessKeyId, sAccessKeySecret, sToken, config);

AmazonS3Client s3 = new AmazonS3Client(new AWSCredentialsProvider() {
    @Override
    public AWSCredentials getCredentials() {
         // 获取STS返回的临时访问凭证。
        return new BasicSessionCredentials(
                "StsToken.AccessKeyId", "StsToken.SecretKeyId", "StsToken.SecurityToken"
    @Override
    public void refresh() {
// 设置Endpoint。
s3.setEndpoint("oss-cn-hongkong.aliyuncs.com");

-(AWSTask<AWSCredentials *> *)credentials{
    // 获取STS返回的临时访问凭证。
    AWSCredentials *credential = [[AWSCredentials alloc]initWithAccessKey:@"StsToken.AccessKeyId" secretKey:@"StsToken.SecretKeyId" sessionKey:@"StsToken.SecurityToken" expiration:[NSDate dateWithTimeIntervalSince1970:1565770577]];
    return [AWSTask taskWithResult:credential];
- (void)invalidateCachedTemporaryCredentials{
}

NSURL* bucketURL = [NSURL URLWithString:@"https://oss-cn-hongkong.aliyuncs.com"];
AWSEndpoint* endpoint = [[AWSEndpoint alloc] initWithRegion:AWSRegionUnknown service:AWSServiceS3 URL:bucketURL];
AWSServiceConfiguration* configuration = [[AWSServiceConfiguration alloc]
    initWithRegion:AWSRegionUSEast2 endpoint:endpoint
    credentialsProvider:[MyCredentialProvider new]];
[[AWSServiceManager defaultServiceManager] setDefaultServiceConfiguration:configuration];

package main
import (
  "fmt"
  "github.com/aws/aws-sdk-go/aws"
  "github.com/aws/aws-sdk-go/aws/credentials"
  "github.com/aws/aws-sdk-go/aws/session"
  "github.com/aws/aws-sdk-go/service/s3"
  "log"
func main() {
  sess, _ := newSession()
  service := s3.New(sess)
  bucket := "demo-bucket"
  key := "demo"
  result, err := service.GetObject(&s3.GetObjectInput{
    Bucket: aws.String(bucket),
    Key:    aws.String(key),
  if err != nil {
    log.Printf("LoadDefaultConfig error: %v", err)
    return
  fmt.Printf("result:%#v\n", result)
func newSession() (*session.Session, error) {
  accessID := os.Getenv("OSS_ACCESS_KEY_ID")
  accessKey := os.Getenv("OSS_ACCESS_KEY_SECRET")
  token := os.Getenv("OSS_SESSION_TOKEN")
  creds := credentials.NewStaticCredentials(accessID, accessKey, token)
  region := "oss-cn-hangzhou"
  endpoint := "https://oss-cn-hangzhou.aliyuncs.com"
  config := &aws.Config{
    Region:           aws.String(region),
    Endpoint:         &endpoint,
    S3ForcePathStyle: aws.Bool(false),
    Credentials:      creds,
  return session.NewSession(config)
}

package main
import (
  "context"
  "fmt"
  "github.com/aws/aws-sdk-go-v2/aws"
  awsconfig "github.com/aws/aws-sdk-go-v2/config"
  "github.com/aws/aws-sdk-go-v2/credentials"
  "github.com/aws/aws-sdk-go-v2/service/s3"
  "log"
func main() {
  // 填写Bucket名称。
  bucketName := "demo-bucket"
  // 填写Object完整路径，完整路径中不能包含Bucket名称。
  fileName := "demo.go"
  customResolver := aws.EndpointResolverWithOptionsFunc(func(service, region string, options ...interface{}) (aws.Endpoint, error) {
    return aws.Endpoint{
      PartitionID:   "oss",
      URL:           "https://oss-cn-hangzhou.aliyuncs.com",
      SigningRegion: "cn-hangzhou",
    }, nil
  envCredential, err := NewEnvironmentVariableCredentials()
  if err != nil {
    log.Printf("error: %v", err)
    return
  provider := NewAwsS3Provider(envCredential)
  cfg, err := awsconfig.LoadDefaultConfig(context.TODO(), awsconfig.WithCredentialsProvider(provider), awsconfig.WithEndpointResolverWithOptions(customResolver))
  if err != nil {
    log.Printf("LoadDefaultConfig error: %v", err)
    return
  awsS3Client := s3.NewFromConfig(cfg)
  //fp, _ := os.Open(fileName)
  //defer fp.Close()
  result, err := awsS3Client.GetObject(context.TODO(), &s3.GetObjectInput{
    Bucket: aws.String(bucketName),
    Key:    aws.String(fileName),
  if err != nil {
    log.Printf("GetObject error: %v", err)
    return
  fmt.Printf("result:%#v\n", result)
type Credentials struct {
  AccessKeyId     string
  AccessKeySecret string
  SecurityToken   string
func (credentials *Credentials) GetAccessKeyID() string {
  return credentials.AccessKeyId
func (credentials *Credentials) GetAccessKeySecret() string {
  return credentials.AccessKeySecret
func (credentials *Credentials) GetSecurityToken() string {
  return credentials.SecurityToken
func NewAwsS3Provider(credential *Credentials) credentials.StaticCredentialsProvider {
  return credentials.StaticCredentialsProvider{
    Value: aws.Credentials{
      AccessKeyID:     credential.AccessKeyId,
      SecretAccessKey: credential.AccessKeySecret,
      SessionToken:    credential.SecurityToken,
func NewEnvironmentVariableCredentials() (*Credentials, error) {
  var envCredential *Credentials
  accessID := os.Getenv("OSS_ACCESS_KEY_ID")
  if accessID == "" {
    return envCredential, fmt.Errorf("access key id is empty!")
  accessKey := os.Getenv("OSS_ACCESS_KEY_SECRET")
  if accessKey == "" {
    return envCredential, fmt.Errorf("access key secret is empty!")
  token := os.Getenv("OSS_SESSION_TOKEN")
  envCredential = &Credentials{
    AccessKeyId:     accessID,
    AccessKeySecret: accessKey,
    SecurityToken:   token,
  return envCredential, nil

1. ```
[default]
addressing_style = virtual
```
2. ```
[default]
aws_access_key_id = [OSS_AccessKeyId]
aws_secret_access_key = [OSS_AccessKeySecret]
aws_secret_sessiontoken = [OSS_SessionToken]
```

Aws::Client::ClientConfiguration awsCC;
awsCC.scheme = Aws::Http::Scheme::HTTP;
awsCC.region = "oss-cn-hongkong";
awsCC.endpointOverride = "oss-cn-hongkong.aliyuncs.com";
Aws::S3::S3Client s3_client(awsCC);

使用Amazon S3 SDK访问OSS

前提条件

使用限制

背景信息

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