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image: stream img JSON & Decode in LoadImage

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Docker-DCO-1.1-Signed-off-by: Cristian Staretu <cristian.staretu@gmail.com> (github: unclejack)
This commit is contained in:
unclejack 2014-11-04 15:45:46 +02:00
parent 4bc28f4e6b
commit 4dbbe4f51a
1 changed files with 8 additions and 4 deletions
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12
image/image.go
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@ -38,14 +38,18 @@ type Image struct {
} }
func LoadImage(root string) (*Image, error) { func LoadImage(root string) (*Image, error) {
// Load the json data // Open the JSON file to decode by streaming
jsonData, err := ioutil.ReadFile(jsonPath(root)) jsonSource, err := os.Open(jsonPath(root))
if err != nil { if err != nil {
return nil, err return nil, err
} }
img := &Image{} defer jsonSource.Close()
if err := json.Unmarshal(jsonData, img); err != nil { img := &Image{}
dec := json.NewDecoder(jsonSource)
// Decode the JSON data
if err := dec.Decode(img); err != nil {
return nil, err return nil, err
} }
if err := utils.ValidateID(img.ID); err != nil { if err := utils.ValidateID(img.ID); err != nil {