AWS S3放置方法参数goamz

Question

Earlier I was using "launchpad.net/goamz/s3" but for my new project I am using "github.com/goamz/goamz/s3". And there is change in put method of bucket now it has one more param "options"

region := aws.USEast2
connection := s3.New(AWSAuth, region)
bucket := connection.Bucket("XXXXX") // change this your bucket name
path := "mypath" // this is the target file and location in S3
//Save image to s3
err = bucket.Put(path,user_content,content_type, s3.ACL("public-read"), options)

Above is my code. Can you help me what is expected in options and how I can get the value of that?

Answer 1

Options is defined in s3.go:

type Options struct {
    SSE              bool
    Meta             map[string][]string
    ContentEncoding  string
    CacheControl     string
    RedirectLocation string
    ContentMD5       string
    // What else?
    // Content-Disposition string
    //// The following become headers so they are []strings rather than strings... I think
    // x-amz-storage-class []string
}

These options are well documented in the official S3 api docs.

In the simplest case, you can just pass nothing. eg: bucket.Put(path,user_content,content_type, s3.ACL("public-read"), s3.Options{})