Method withRetry

internal/codespaces/api/api.go:1205–1217

withRetry takes a generic function that sends an http request and retries only when the returned response has a >=500 status code.

(f func() (*http.Response, error))

// withRetry takes a generic function that sends an http request and retries
// only when the returned response has a >=500 status code.
func (a *API) withRetry(f func() (*http.Response, error)) (*http.Response, error) {
	bo := backoff.NewConstantBackOff(a.retryBackoff)
	return backoff.RetryWithData(func() (*http.Response, error) {
		resp, err := f()
		if err != nil {
			return nil, backoff.Permanent(err)
		}
		if resp.StatusCode < 500 {
			return resp, nil
		}
		return nil, fmt.Errorf("received response with status code %d", resp.StatusCode)
	}, backoff.WithMaxRetries(bo, 3))
}

// ExternalHTTPClient returns an HTTP client for requests to non-GitHub hosts.
// It must not carry GitHub authentication credentials.