douju9272
2017-10-04 22:16 浏览 338
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如何在Golang中从AWS S3获取资源URL

I need to get public permanent (not signed) URL of a resource using golang and official aws go sdk. In Java AWS S3 SDK there's a method called getResourceUrl() what's the equivalent in go?

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  • 已采纳
    douxianji6181 douxianji6181 2017-10-04 22:40

    This is how you get presigned URLs using the go sdk:

    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
    }
    

    If what you want is just the URL of a public access object you can build the URL yourself:

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

    Where is something like us-east-2. So using go it will be something like:

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

    Here is a list of all the available regions for S3.

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