Golang create presigned url for Aliyun OSS

aliyunoss_presigned_url.go

package main

import (
	"fmt"
	"log"

	"github.com/aliyun/aliyun-oss-go-sdk/oss"
)

// Example create presigned url for Aliyun OSS

func main() {
	endpoint := "oss-ap-southeast-5.aliyuncs.com"
	accessKeyID := "ACCESS_KEY_ID"
	accessKeySecret := "ACCESS_KEY_SECRET"

	bucketName := "BUCKET_NAME"
	objectName := "path/some-image.jpeg"

	client, err := oss.New(endpoint, accessKeyID, accessKeySecret)
	if err != nil {
		log.Fatal(err)
	}

	bucket, err := client.Bucket(bucketName)
	if err != nil {
		log.Fatal(err)
	}

	expiredInSec := int64(60)
	signedURL, err := bucket.SignURL(objectName, oss.HTTPGet, expiredInSec) // generate presign URL
	if err != nil {
		log.Fatal(err)
	}

	fmt.Println(signedURL) // print presigned URL

	// Comparison between presigned URL and old URL:
	// Old URL:       http://BUCKET_NAME.oss-ap-southeast-5.aliyuncs.com/path/some-image.jpeg
	// Presigned URL: http://BUCKET_NAME.oss-ap-southeast-5.aliyuncs.com/path/some-image.jpeg?Expires=1629182166&OSSAccessKeyId=LTAItHk&Signature=e4ysGj%3D
	//
	// Note:
	// - Presigned URL is old URL with additional query param
	// - Old URL will be restricted for public access
	// - Presigned URL contain access-key-id but not the access-key-secret
	// - Both access-key-id and access-key-secret is required to generate presigned URL
	//
	// Learn More:
	// - https://www.alibabacloud.com/help/doc-detail/31952.htm
	// - https://github.com/aliyun/aliyun-oss-go-sdk
	// - https://medium.com/trendyol-tech/alibaba-cloud-object-storage-service-56a05e8e077d
	// - https://pkg.go.dev/github.com/aliyun/aliyun-oss-go-sdk@v2.1.10+incompatible/oss#Bucket.SignURL
}