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metadata: Make JSON parser more robust

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Make sure the type conversions are OK.

Signed-off-by: Rolf Neugebauer <rolf.neugebauer@docker.com>
This commit is contained in:
Rolf Neugebauer 2017-04-12 13:53:14 +01:00
parent 626f02def2
commit b0a0b4ceb7
1 changed files with 14 additions and 2 deletions
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16
pkg/metadata/main.go
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@ -144,16 +144,28 @@ func processUserData(data []byte) error {
// This is not an error
return nil
}
cm := fd.(map[string]interface{})
cm, ok := fd.(map[string]interface{})
if !ok {
log.Printf("Could convert JSON to desired format: %s", fd)
return nil
}
for d, val := range cm {
dir := path.Join(ConfigPath, d)
if err := os.Mkdir(dir, 0755); err != nil {
log.Printf("Failed to create %s: %s", dir, err)
continue
}
files := val.(map[string]interface{})
files, ok := val.(map[string]interface{})
if !ok {
log.Printf("Could convert JSON for files: %s", val)
continue
}
for f, i := range files {
fi := i.(map[string]interface{})
if !ok {
log.Printf("Could convert JSON for items: %s", i)
continue
}
if _, ok := fi["perm"]; !ok {
log.Printf("No permission provided %s:%s", f, fi)
continue