用 Aws-SDK-Go-v2 连接 S4

连接到 S4 Endpoint

以下代码基于版本

github.com/aws/aws-sdk-go-v2 v1.24.1
github.com/aws/aws-sdk-go-v2/config v1.26.6
github.com/aws/aws-sdk-go-v2/credentials v1.16.16
github.com/aws/aws-sdk-go-v2/service/s3 v1.48.1

main.go

package main

import (
	"context"
	"fmt"
	"log"

	"github.com/aws/aws-sdk-go-v2/aws"
	"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"
)

const s3Endpoint = "https://s3.bitiful.net"

func main() {
	// 替换成自己的AccessKey和SecretKey
	s3AccessKey := "your-access-key"
	s3SecretKey := "your-secret-key"

	// 获取S3客户端
	s3Client, err := getS3Client(s3AccessKey, s3SecretKey)
	if err != nil {
		log.Println("get s3 client failed, err=", err)
		return
	}
	log.Println("get s3 client success", s3Client)
}

// 获取S3客户端
func getS3Client(key, secret string) (*s3.Client, error) {
	customResolver := aws.EndpointResolverWithOptionsFunc(func(service, region string, options ...interface{}) (aws.Endpoint, error) {
		if service == "S3" {
			return aws.Endpoint{
				URL: s3Endpoint,
			}, nil
		}
		return aws.Endpoint{}, fmt.Errorf("unknown service requested")
	})

	customProvider := credentials.NewStaticCredentialsProvider(key, secret, "")
	cfg, err := config.LoadDefaultConfig(context.TODO(), config.WithCredentialsProvider(customProvider), config.WithEndpointResolverWithOptions(customResolver))
	if err != nil {
		return nil, err
	}
        cfg.Region = "cn-east-1"
	s3client := s3.NewFromConfig(cfg)
	return s3client, nil
}

列出桶中对象

main.go

package main

import (
	"context"
	"fmt"
	"log"

	"github.com/aws/aws-sdk-go-v2/aws"
	"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"
)

const s3Endpoint = "https://s3.bitiful.net"

func main() {
	// 替换成自己的AccessKey和SecretKey
	s3AccessKey := "your-access-key"
	s3SecretKey := "your-secret-key"

	// 获取S3客户端
	s3Client, err := getS3Client(s3AccessKey, s3SecretKey)
	if err != nil {
		log.Println("get s3 client failed, err=", err)
		return
	}

	// 替换成自己的桶名
	bucket := "your-bucket-name" // 例如：test

	// 获取桶内文件列表
	listObjsResponse, err := s3Client.ListObjectsV2(context.TODO(), &s3.ListObjectsV2Input{
		Bucket:    aws.String(bucket),
		Delimiter: aws.String("/"),
		MaxKeys:   aws.Int32(50),
	})
	if err != nil {
		log.Println("list objects failed, err=", err)
		return
	}

	// 输出文件列表
	for _, object := range listObjsResponse.Contents {
		log.Printf("object key=%v", *object.Key)
	}

	log.Println("list objects success")
}

// 获取S3客户端
func getS3Client(key, secret string) (*s3.Client, error) {
	customResolver := aws.EndpointResolverWithOptionsFunc(func(service, region string, options ...interface{}) (aws.Endpoint, error) {
		if service == "S3" {
			return aws.Endpoint{
				URL: s3Endpoint,
			}, nil
		}
		return aws.Endpoint{}, fmt.Errorf("unknown service requested")
	})

	customProvider := credentials.NewStaticCredentialsProvider(key, secret, "")
	cfg, err := config.LoadDefaultConfig(context.TODO(), config.WithCredentialsProvider(customProvider), config.WithEndpointResolverWithOptions(customResolver))
	if err != nil {
		return nil, err
	}
        cfg.Region = "cn-east-1"
	s3client := s3.NewFromConfig(cfg)
	return s3client, nil
}

获取具备时效的预签名文件下载链接

main.go

package main

import (
	"context"
	"fmt"
	"log"
	"time"

	"github.com/aws/aws-sdk-go-v2/aws"
	"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"
)

const s3Endpoint = "https://s3.bitiful.net"

func main() {
	// 替换成自己的AccessKey和SecretKey
	s3AccessKey := "your-access-key"
	s3SecretKey := "your-secret-key"

	// 获取S3客户端
	s3Client, err := getS3Client(s3AccessKey, s3SecretKey)
	if err != nil {
		log.Println("get s3 client failed, err=", err)
		return
	}

	// 替换成自己的桶名和对象的key
	bucket := "your-bucket-name"   // 例如：test
	objectKey := "your-object-key" // 例如：test.txt

	// 获取 presign client
	preSignClient := s3.NewPresignClient(s3Client)

	// 获取预签名请求
	preSignedRequest, _ := preSignClient.PresignGetObject(context.TODO(), &s3.GetObjectInput{
		Bucket: aws.String(bucket),
		Key:    aws.String(objectKey),
	}, func(presignOptions *s3.PresignOptions) {
		presignOptions.Expires = time.Hour // 过期时间，默认是900秒，这里修改为合适的时效，比如1小时
	})

	// 输出预签名URL
	preSignedUrl := preSignedRequest.URL
	log.Printf("get preSigned url success, preSignedUrl=%v", preSignedUrl)
}

// 获取S3客户端
func getS3Client(key, secret string) (*s3.Client, error) {
	customResolver := aws.EndpointResolverWithOptionsFunc(func(service, region string, options ...interface{}) (aws.Endpoint, error) {
		if service == "S3" {
			return aws.Endpoint{
				URL: s3Endpoint,
			}, nil
		}
		return aws.Endpoint{}, fmt.Errorf("unknown service requested")
	})

	customProvider := credentials.NewStaticCredentialsProvider(key, secret, "")
	cfg, err := config.LoadDefaultConfig(context.TODO(), config.WithCredentialsProvider(customProvider), config.WithEndpointResolverWithOptions(customResolver))
	if err != nil {
		return nil, err
	}
        cfg.Region = "cn-east-1"
	s3client := s3.NewFromConfig(cfg)
	return s3client, nil
}

在预签名链接中加入 CoreIX 媒体处理参数

因 S3 协议的预签名会将所有 Url 参数（Args）包含在内统一做签名，所以这里需要用到 Middleware 处理：

main.go

package main

import (
	"context"
	"fmt"
	"log"
	"time"

	"github.com/aws/smithy-go/middleware"
	smithyhttp "github.com/aws/smithy-go/transport/http"

	"github.com/aws/aws-sdk-go-v2/aws"
	"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"
)

const s3Endpoint = "https://s3.bitiful.net"

func main() {
	// 替换成自己的AccessKey和SecretKey
	s3AccessKey := "your-access-key"
	s3SecretKey := "your-secret-key"

	// 获取S3客户端
	s3Client, err := getS3Client(s3AccessKey, s3SecretKey)
	if err != nil {
		log.Println("get s3 client failed, err=", err)
		return
	}

	// 替换成自己的桶名和对象的key
	bucket := "your-bucket-name"   // 例如：test
	objectKey := "your-object-key" // 例如：test.txt

	// 获取 presign client
	preSignClient := s3.NewPresignClient(s3Client)

	// 在预签名地址中 加入 CoreIX 媒体处理参数
	bitifulQuery := map[string]string{"w": "500"} // 宽度为500px
	// 在预签名地址中 加入「单线程限速」参数
	// bitifulQuery := map[string]string{"x-amz-limit-rate": "102400"} // 102400 代表 102400字节/秒

	//自定义参数, 使用ctx传递
	ctx := context.WithValue(context.TODO(), "bitiful-query", bitifulQuery)

	// 获取预签名请求
	preSignedRequest, _ := preSignClient.PresignGetObject(ctx, &s3.GetObjectInput{
		Bucket: aws.String(bucket),
		Key:    aws.String(objectKey),
	}, func(presignOptions *s3.PresignOptions) {
		presignOptions.Expires = time.Hour // 过期时间，默认是900秒，这里修改为合适的时效，比如1小时
		presignOptions.ClientOptions = append(presignOptions.ClientOptions, func(options *s3.Options) {
			// 注入自定义中间件
			options.APIOptions = append(options.APIOptions, registerPresignedUrlAddBitifulQueryMiddleware)
		})
	})

	//输出预签名URL
	preSignedUrl := preSignedRequest.URL
	log.Println("get preSigned url success, preSignedUrl=", preSignedUrl)
}

// 获取S3客户端
func getS3Client(key, secret string) (*s3.Client, error) {
	customResolver := aws.EndpointResolverWithOptionsFunc(func(service, region string, options ...interface{}) (aws.Endpoint, error) {
		if service == "S3" {
			return aws.Endpoint{
				URL: s3Endpoint,
			}, nil
		}
		return aws.Endpoint{}, fmt.Errorf("unknown service requested")
	})

	customProvider := credentials.NewStaticCredentialsProvider(key, secret, "")
	cfg, err := config.LoadDefaultConfig(context.TODO(), config.WithCredentialsProvider(customProvider), config.WithEndpointResolverWithOptions(customResolver))
	if err != nil {
		return nil, err
	}
        cfg.Region = "cn-east-1"
	s3client := s3.NewFromConfig(cfg)
	return s3client, nil
}

// 获取预签名url增加自定义参数
func registerPresignedUrlAddBitifulQueryMiddleware(stack *middleware.Stack) error {
	// Attach the custom middleware to the beginning of the Initialize step
	return stack.Build.Add(presignedUrlAddBitifulQueryMiddleware, middleware.After)
}

// 自定义中间件
var presignedUrlAddBitifulQueryMiddleware = middleware.BuildMiddlewareFunc("AddBitifulQuery", func(ctx context.Context, input middleware.BuildInput, next middleware.BuildHandler) (out middleware.BuildOutput, metadata middleware.Metadata, err error) {
	bitifulQuery := ctx.Value("bitiful-query")
	if bitifulQuery == nil {
		return next.HandleBuild(ctx, input)
	}

	req, ok := input.Request.(*smithyhttp.Request)
	if !ok {
		return out, metadata, fmt.Errorf("unknown transport type %T", req)
	}

	bitifulQueryMap, ok := bitifulQuery.(map[string]string)
	if !ok {
		return next.HandleBuild(ctx, input)
	}

	// set bitiful query
	query := req.URL.Query()
	for key, value := range bitifulQueryMap {
		query.Set(key, value)
	}
	req.URL.RawQuery = query.Encode()

	return next.HandleBuild(ctx, input)
})

在预签名链接中加入「单线程限速」参数

S4 拓展了 x-amz-limit-rate 参数，可以对当前对象做下载的单线程限速，value 为字节数（正整数）。

如上所述，这里仍然需要用到 Middleware 处理签名, 参考【在预签名链接中加入 CoreIX 媒体处理参数】只需修改bitifulQuery即可：

...
// 在预签名地址中 加入「单线程限速」参数
bitifulQuery := map[string]string{"x-amz-limit-rate": "102400"} // 102400 代表 102400字节/秒

//自定义参数, 使用ctx传递
ctx := context.WithValue(context.TODO(), "bitiful-query", bitifulQuery)
...

S4 SDK

缤纷云 API

用 Aws-SDK-Go-v2 连接 S4

连接到 S4 Endpoint

以下代码基于版本

列出桶中对象

获取具备时效的预签名文件下载链接

在预签名链接中加入 CoreIX 媒体处理参数

在预签名链接中加入「单线程限速」参数

S4 SDK

缤纷云 API

​连接到 S4 Endpoint

​以下代码基于版本

​列出桶中对象

​获取具备时效的预签名文件下载链接

​在预签名链接中加入 CoreIX 媒体处理参数

​在预签名链接中加入「单线程限速」参数

连接到 S4 Endpoint

以下代码基于版本

列出桶中对象

获取具备时效的预签名文件下载链接

在预签名链接中加入 CoreIX 媒体处理参数

在预签名链接中加入「单线程限速」参数