这就是你如何使用go sdk获得预先签名的URL：

func GetFileLink(key string) (string, error) {
    svc := s3.New(some params)

    params := &s3.GetObjectInput{
        Bucket: aws.String(a bucket name),
        Key:    aws.String(key),
    }

    req, _ := svc.GetObjectRequest(params)

    url, err := req.Presign(15 * time.Minute) // Set link expiration time
    if err != nil {
        global.Log("[AWS GET LINK]:", params, err)
    }

    return url, err
}

如果您需要的只是公共访问对象的URL，则可以自己构建URL：

https://<region>.amazonaws.com/<bucket-name>/<key>

其中<region>类似于us-east-2，所以使用go，它将类似于：

url := "https://%s.amazonaws.com/%s/%s"
url = fmt.Sprintf(url, "us-east-2", "my-bucket-name", "some-file.txt")

以下是S3所有可用区域的列表。

看起来几乎干净：

import "github.com/aws/aws-sdk-go/private/protocol/rest"

...

params := &s3.GetObjectInput{
    Bucket: aws.String(a bucket name),
    Key:    aws.String(key),
}
req, _ := svc.GetObjectRequest(params)
rest.Build(req) // aws method to build URL in request object
url = req.HTTPRequest.URL.String() // complete URL to resource