// URLFor returns a URL which may be used to retrieve the content stored at the given path.
// May return an UnsupportedMethodErr in certain StorageDriver implementations.
func (d *driver) URLFor(ctx context.Context, path string, options map[string]interface{}) (string, error) {
methodString := "GET"
method, ok := options["method"]
if ok {
methodString, ok = method.(string)
if !ok || (methodString != "GET" && methodString != "HEAD") {
return "", storagedriver.ErrUnsupportedMethod{}
}
}
expiresIn := 20 * time.Minute
expires, ok := options["expiry"]
if ok {
et, ok := expires.(time.Time)
if ok {
expiresIn = et.Sub(time.Now())
}
}
var req *request.Request
switch methodString {
case "GET":
req, _ = d.S3.GetObjectRequest(&s3.GetObjectInput{
Bucket: aws.String(d.Bucket),
Key: aws.String(d.s3Path(path)),
})
case "HEAD":
req, _ = d.S3.HeadObjectRequest(&s3.HeadObjectInput{
Bucket: aws.String(d.Bucket),
Key: aws.String(d.s3Path(path)),
})
default:
panic("unreachable")
}
return req.Presign(expiresIn)
}