func TestCopyIgnoreNilMembers(t *testing.T) {
type Foo struct {
A *string
}
f := &Foo{}
assert.Nil(t, f.A)
var f2 Foo
awsutil.Copy(&f2, f)
assert.Nil(t, f2.A)
fcopy := awsutil.CopyOf(f)
f3 := fcopy.(*Foo)
assert.Nil(t, f3.A)
}
func fillPresignedURL(r *aws.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()
config.Endpoint = ""
config.Region = *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
}
func ExampleCopyOf() {
type Foo struct {
A int
B []*string
}
// Create the initial value
str1 := "hello"
str2 := "bye bye"
f1 := &Foo{A: 1, B: []*string{&str1, &str2}}
// Do the copy
v := awsutil.CopyOf(f1)
var f2 *Foo = v.(*Foo)
// Print the result
fmt.Println(awsutil.StringValue(f2))
// Output:
// {
// A: 1,
// B: ["hello","bye bye"]
// }
}