usps-webtools-promise/dist/utils/request.js

API wrapper for the USPS Web-Tools, with Promises!

import { request } from "node:https";
import { stringify } from "node:querystring";
import { create } from "xmlbuilder2";
const makeRequest = async (options) => new Promise((resolve, reject) => {
    const innerRequest = request(options, (response) => {
        let body = "";
        response.on("data", (chunk) => (body += chunk));
        response.on("end", () => {
            try {
                const xml = create(body);
                resolve(xml.end({ format: "object" }));
            }
            catch (error) {
                reject(new Error(error));
            }
        });
    });
    innerRequest.on("error", (error) => {
        reject(error);
    });
    innerRequest.end();
});
export default async (api, method, property, config, parameters) => {
    const requestName = `${method}Request`;
    const responseName = `${method}Response`;
    const xmlObject = {
        [requestName]: {
            ...parameters,
            "@USERID": config.userId,
        },
    };
    const xml = create(xmlObject).end();
    const qs = stringify({
        API: api,
        XML: xml,
    });
    const staging = config.staging ?? false;
    const options = {
        hostname: staging
            ? "stg-secure.shippingapis.com"
            : "secure.shippingapis.com",
        method: "GET",
        path: `/ShippingAPI.dll?${qs}`,
    };
    let uspsResponse;
    try {
        uspsResponse = await makeRequest(options);
    }
    catch (error) {
        return error;
    }
    if (uspsResponse.Error) {
        const error = uspsResponse.Error;
        throw new Error(error.Description.trim());
    }
    let specificResult;
    if (uspsResponse?.[responseName]?.[property]) {
        specificResult = uspsResponse[responseName][property];
        if (specificResult.Error) {
            throw new Error(specificResult.Error.Description.trim());
        }
        return specificResult;
    }
    throw new Error("Can't find result");
};