func GetServiceAccountTokenFromMetadataServer()

in images/controller/pkg/util.go [97:125]

• 25 lines of code
• 4 McCabe index (conditional complexity)

func GetServiceAccountTokenFromMetadataServer(sa string) (string, error) {
	token := ""
	url := fmt.Sprintf("http://metadata.google.internal/computeMetadata/v1/instance/service-accounts/%s/token", sa)
	type saTokenResponse struct {
		AccessToken string `json:"access_token"`
		ExpiresIn   int    `json:"expires_in"`
		TokenType   string `json:"token_type"`
	}

	client := &http.Client{}
	req, err := http.NewRequest("GET", url, nil)
	req.Header.Add("Metadata-Flavor", "Google")
	resp, err := client.Do(req)
	if err != nil {
		return sa, err
	}

	body, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		return sa, err
	}

	var tokenResp saTokenResponse
	if err := json.Unmarshal(body, &tokenResp); err != nil {
		return token, err
	}

	return tokenResp.AccessToken, nil
}