// Build builds the REST component of a service request.
func Build(r *request.Request) {
if r.ParamsFilled() {
v := reflect.ValueOf(r.Params).Elem()
buildLocationElements(r, v)
buildBody(r, v)
}
}
func fillPresignedURL(r *request.Request) {
if !r.ParamsFilled() {
return
}
params := r.Params.(*CopySnapshotInput)
// Stop if PresignedURL/DestinationRegion is set
if params.PresignedUrl != nil || params.DestinationRegion != nil {
return
}
// First generate a copy of parameters
r.Params = awsutil.CopyOf(r.Params)
params = r.Params.(*CopySnapshotInput)
// Set destination region. Avoids infinite handler loop.
// Also needed to sign sub-request.
params.DestinationRegion = r.Service.Config.Region
// Create a new client pointing at source region.
// We will use this to presign the CopySnapshot request against
// the source region
config := r.Service.Config.Copy().
WithEndpoint("").
WithRegion(*params.SourceRegion)
client := New(config)
// Presign a CopySnapshot request with modified params
req, _ := client.CopySnapshotRequest(params)
url, err := req.Presign(300 * time.Second) // 5 minutes should be enough.
if err != nil { // bubble error back up to original request
r.Error = err
}
// We have our URL, set it on params
params.PresignedUrl = &url
}