Method do

api.go:617–655

do - execute http request.

(req *http.Request)

// do - execute http request.
func (c *Client) do(req *http.Request) (resp *http.Response, err error) {
	defer func() {
		if IsNetworkOrHostDown(err, false) {
			c.markOffline()
		}
	}()

	resp, err = c.httpClient.Do(req)
	if err != nil {
		// Handle this specifically for now until future Golang versions fix this issue properly.
		if urlErr, ok := err.(*url.Error); ok {
			if strings.Contains(urlErr.Err.Error(), "EOF") {
				return nil, &url.Error{
					Op:  urlErr.Op,
					URL: urlErr.URL,
					Err: errors.New("Connection closed by foreign host " + urlErr.URL + ". Retry again."),
				}
			}
		}
		return nil, err
	}

	// Response cannot be non-nil, report error if thats the case.
	if resp == nil {
		msg := "Response is empty. " + reportIssue
		return nil, errInvalidArgument(msg)
	}

	// If trace is enabled, dump http request and response,
	// except when the traceErrorsOnly enabled and the response's status code is ok
	if c.isTraceEnabled && (!c.traceErrorsOnly || resp.StatusCode != http.StatusOK) {
		err = c.dumpHTTP(req, resp)
		if err != nil {
			return nil, err
		}
	}

	return resp, nil
}

// List of success status.
var successStatus = set.CreateIntSet(