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package auth
import (
"encoding/json"
"golang.org/x/oauth2"
"io/ioutil"
"os"
)
func FileSource(path string, token *oauth2.Token, conf *oauth2.Config) oauth2.TokenSource {
return &fileSource{
tokenPath: path,
tokenSource: conf.TokenSource(oauth2.NoContext, token),
}
}
type fileSource struct {
tokenPath string
tokenSource oauth2.TokenSource
}
func (self *fileSource) Token() (*oauth2.Token, error) {
token, err := self.tokenSource.Token()
if err != nil {
return token, err
}
// Save token to file
SaveToken(self.tokenPath, token)
return token, nil
}
func ReadFile(path string) ([]byte, bool, error) {
if !fileExists(path) {
return nil, false, nil
}
content, err := ioutil.ReadFile(path)
if err != nil {
return nil, true, err
}
return content, true, nil
}
func ReadToken(path string) (*oauth2.Token, bool, error) {
content, exists, err := ReadFile(path)
if err != nil {
return nil, exists, err
}
token := &oauth2.Token{}
return token, exists, json.Unmarshal(content, token)
}
func SaveToken(path string, token *oauth2.Token) error {
data, err := json.MarshalIndent(token, "", " ")
if err != nil {
return err
}
if err = mkdir(path); err != nil {
return err
}
// Write to temp file first
tmpFile := path + ".tmp"
err = ioutil.WriteFile(tmpFile, data, 0600)
if err != nil {
os.Remove(tmpFile)
return err
}
// Move file to correct path
return os.Rename(tmpFile, path)
}
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