问fetch:无法加载资源: net::ERR_EMPTY_RESPONSE (但对于大多数用户来说，它可以工作)

EN

Failed to load resource: net::ERR_EMPTY_RESPONSE 
TypeError: Failed to fetch

function fetchWrapper(url, data, options, noModals) {
    var body;
    if (data instanceof FormData) {
        body = data;
    } elseif (data !== null) {
        body = JSON.stringify(data);
    }
    options.body = body;
    if (!options.method) {
        options.method = "POST";
    }

    return fetch(url, options).then(response => {
        if (!response.ok) {
            return response.json().then(json => {
                var error = (json && json.error) || response.statusText;
                var message = "";
                if (json.error && errors[json.error]) {
                    error = errors[json.error];
                }
                if (json.error && messages[json.error]) {
                    message = messages[json.error];
                }
                // Bad request - show the error message to the user
                if (response.status >= 400 && response.status < 500) {
                    return handleError(noModals, error, message);
                } else { // server error
                    error = errors.wrong;
                    message = messages.wrong;

                    return handleError(noModals, error, message, json ? json.error : "Unknown error");
                }
            })
        }
        return response.json().then(json => {
            // the response returned a success code but there is an error message
            if (json.error) {
                return handleError(noModals, json.error);
            }
            return json;
        });
    }).catch(reason => { // JavaScript or network error
        console.log(reason); // this is where the TypeError is printed
        // not showing an error to the user
    });
}