// Extract interprets any serverResult as a Server, if possible.
func (r serverResult) Extract() (*Server, error) {
if r.Err != nil {
return nil, r.Err
}
var response struct {
Server Server `mapstructure:"server"`
}
config := &mapstructure.DecoderConfig{
DecodeHook: toMapFromString,
Result: &response,
}
decoder, err := mapstructure.NewDecoder(config)
if err != nil {
return nil, err
}
err = decoder.Decode(r.Body)
if err != nil {
return nil, err
}
return &response.Server, nil
}
// ExtractServers interprets the results of a single page from a List() call, producing a slice of Server entities.
func ExtractServers(page pagination.Page) ([]Server, error) {
casted := page.(ServerPage).Body
var response struct {
Servers []Server `mapstructure:"servers"`
}
config := &mapstructure.DecoderConfig{
DecodeHook: toMapFromString,
Result: &response,
}
decoder, err := mapstructure.NewDecoder(config)
if err != nil {
return nil, err
}
err = decoder.Decode(casted)
return response.Servers, err
}
// Extract provides access to the individual Flavor returned by the Get function.
func (gr GetResult) Extract() (*Flavor, error) {
if gr.Err != nil {
return nil, gr.Err
}
var result struct {
Flavor Flavor `mapstructure:"flavor"`
}
cfg := &mapstructure.DecoderConfig{
DecodeHook: defaulter,
Result: &result,
}
decoder, err := mapstructure.NewDecoder(cfg)
if err != nil {
return nil, err
}
err = decoder.Decode(gr.Body)
return &result.Flavor, err
}
// DecodeHeader is a function that decodes a header (usually of type map[string]interface{}) to
// another type (usually a struct). This function is used by the objectstorage package to give
// users access to response headers without having to query a map. A DecodeHookFunction is used,
// because OpenStack-based clients return header values as arrays (Go slices).
func DecodeHeader(from, to interface{}) error {
config := &mapstructure.DecoderConfig{
DecodeHook: func(from, to reflect.Kind, data interface{}) (interface{}, error) {
if from == reflect.Slice {
return data.([]string)[0], nil
}
return data, nil
},
Result: to,
WeaklyTypedInput: true,
}
decoder, err := mapstructure.NewDecoder(config)
if err != nil {
return err
}
if err := decoder.Decode(from); err != nil {
return err
}
return nil
}
// ExtractFlavors provides access to the list of flavors in a page acquired from the List operation.
func ExtractFlavors(page pagination.Page) ([]Flavor, error) {
casted := page.(FlavorPage).Body
var container struct {
Flavors []Flavor `mapstructure:"flavors"`
}
cfg := &mapstructure.DecoderConfig{
DecodeHook: defaulter,
Result: &container,
}
decoder, err := mapstructure.NewDecoder(cfg)
if err != nil {
return container.Flavors, err
}
err = decoder.Decode(casted)
if err != nil {
return container.Flavors, err
}
return container.Flavors, nil
}