func()

in oauth2/authorization_tokenretriever.go [282:321]

• 34 lines of code
• 12 McCabe index (conditional complexity)

func (ce *TokenRetriever) ExchangeDeviceCode(ctx context.Context, req DeviceCodeExchangeRequest) (*TokenResult, error) {
	for {
		request, err := ce.newDeviceCodeExchangeRequest(req)
		if err != nil {
			return nil, err
		}

		response, err := ce.transport.Do(request)
		if err != nil {
			return nil, err
		}
		token, err := ce.handleAuthTokensResponse(response)
		if err == nil {
			return token, nil
		}
		terr, ok := err.(*TokenError)
		if !ok {
			return nil, err
		}
		switch terr.ErrorCode {
		case "expired_token":
			// The user has not authorized the device quickly enough, so the device_code has expired.
			return nil, fmt.Errorf("the device code has expired")
		case "access_denied":
			// The user refused to authorize the device
			return nil, fmt.Errorf("the device was not authorized")
		case "authorization_pending":
			// Still waiting for the user to take action
		case "slow_down":
			// You are polling too fast
		}

		select {
		case <-time.After(req.PollInterval):
			continue
		case <-ctx.Done():
			return nil, errors.New("cancelled")
		}
	}
}