Awesome

Simple S3 API for Go. Docs here.

S3 Config

The configuration contains you credentials and bucket info.

s3c := &s3.S3{
  Bucket:    os.Getenv("S3_BUCKET"),
  AccessKey: os.Getenv("S3_KEY"),
  Secret:    os.Getenv("S3_SECRET"),
  Path:      os.Getenv("S3_PATH"),
}

Object

Object(path) returns a new S3 object handle bound to the configuration it was created from.

obj := s3c.Object("path/to/hello.txt")

Upload

Writing to the WriteAbortCloser returned by Writer() allows you to upload objects.

w := obj.Writer()
io.Copy(w, bytes.NewBufferString("hello world!"))
w.Close()

// NOTE: You can abort uploads with w.Abort()

Download

Reading from the ReadCloser returned by Reader() allows you to download objects.

r, headers, err := obj.Reader()
b, err := ioutil.ReadAll(r)

Existence

Check if an object exists.

exists, err := obj.Exists()

Delete

Delete the object.

err := obj.Delete()

Generate Signed Form Upload URLs

o := s3c.Object("hello.txt")

p := make(s3.Policy)
p.SetExpiration(3600)
p.Conditions().Bucket(s3c.Bucket)
p.Conditions().ACL(s3.PublicRead)
p.Conditions().StartsWith("$key", "hello.txt")

url, err := o.FormURL(s3.PublicRead, p)

Generate Pre-Signed Expiring URLs

url, err := o.ExpiringURL(time.Second*60)