@sap/cds-dk/lib/util/axios.js

Command line client and development toolkit for the SAP Cloud Application Programming Model

module.exports = {
    pruneErrors
};

function pruneErrors() {
    function stacklessError(message) {
        const { stackTraceLimit } = Error;
        Error.stackTraceLimit = 0;
        const error = new Error(message);
        Error.stackTraceLimit = stackTraceLimit;
        return error;
    }

    require('axios').interceptors.response.use(
        response => response,
        axError => {
            const { inspect } = require('util');
            let { url, method } = axError.config ?? {};
            url = url?.replace(/(passcode|refreshToken|clientsecret|key)=[^&]+/g, '$1=...');
            const { errno, code, response = {}, message: axMessage } = axError;
            const prefix = (url && method ? `${method.toUpperCase()} ${url}` : 'Request') + ' failed';

            let error;
            if (errno) {
                // System error during request.
                const message = prefix
                    + `: ${errno} ${code}`
                    + (/\b(ENOTFOUND|EAI_AGAIN)\b/.test(code) ? `. Make sure the URL is correct and the server is running.` : '');
                error = stacklessError(message);
            } else {
                // Error after request has been made.
                const { status, statusText } = response;
                let { data } = response;
                if (Buffer.isBuffer(data)) {
                    data = data.toString();
                    try {
                        data = JSON.parse(data);
                    } catch (error) { /* unexpected; data will be included in error below */
                    }
                }
                const inspectData = data && !data.error_description;
                const reason = !inspectData && data?.error /* RFC 6749 */ && (typeof data.error === 'string' ? data.error : inspect(data.error));
                const details = inspectData ? inspect(data) : data?.error_description /* RFC 6749 */;
                const message = prefix + (
                    status || statusText || reason || details
                        ? (status || statusText ? ':' : '') +
                        (status ? ` ${status}` : '') +
                        (statusText ? ` ${statusText}` : '') +
                        (reason ? `. ${reason}` : '') +
                        (details ? `. Details: ${details}` : '')
                        : (axMessage ? `: ${axMessage}` : '')
                );

                error = stacklessError(message);
                if (status) {
                    error.status = status;
                }
                if (data?.passcode_url) {
                    error.auth = {
                        passcode_url: data.passcode_url
                    };
                }
            }

            if (require('../').debug('req')) {
                error.cause = axError;
            }
            return Promise.reject(error);
        }
    );
    return module.exports;
}