forked from fluxcd/flux
/
gcp.go
52 lines (42 loc) · 1.11 KB
/
gcp.go
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package registry
import (
"encoding/json"
"fmt"
"net/http"
)
const (
gcpDefaultTokenURL = "http://metadata.google.internal/computeMetadata/v1/instance/service-accounts/default/token"
)
type gceToken struct {
AccessToken string `json:"access_token"`
ExpiresIn int `json:"expires_in"`
TokenType string `json:"token_type"`
}
func GetGCPOauthToken(host string) (creds, error) {
request, err := http.NewRequest("GET", gcpDefaultTokenURL, nil)
if err != nil {
return creds{}, err
}
request.Header.Add("Metadata-Flavor", "Google")
client := &http.Client{}
response, err := client.Do(request)
if err != nil {
return creds{}, err
}
if response.StatusCode != http.StatusOK {
return creds{}, fmt.Errorf("unexpected status from metadata service: %s", response.Status)
}
var token gceToken
decoder := json.NewDecoder(response.Body)
if err := decoder.Decode(&token); err != nil {
return creds{}, err
}
if err := response.Body.Close(); err != nil {
return creds{}, err
}
return creds{
registry: host,
provenance: "",
username: "oauth2accesstoken",
password: token.AccessToken}, nil
}