@lxfriday/nodejs-file-downloader/makeRequest.js

A file downloader for NodeJs

const { http, https } = require('follow-redirects');
const { Readable } = require('stream')


function makeRequest(url, config = {}) {

    let cancelPromiseReject;

    let responsePromiseReject;

    let request;


    const responsePromise = new Promise((resolve, reject) => {
        responsePromiseReject = reject;
        const protocol = url.trim().startsWith('https') ? https : http;

        request = protocol.request(url, config, (res) => {
            resolve(res)
        });
        request.end()
        request.on('error',(e)=>{

            responsePromiseReject(e)
        })

    });
    const timeoutPromise = new Promise((resolve, reject) => {
        if (config.timeout) {
            request.setTimeout(config.timeout, () => {
                const customError = new Error('Request timed out')
                customError.code = 'ERR_REQUEST_TIMEDOUT'
                reject(customError)
            });
        }
    });

    const cancelPromise = new Promise((resolve, reject) => {
        cancelPromiseReject = reject;
    })

    
    async function makeRequestIter() {

        const response = await Promise.race([
            responsePromise,
            cancelPromise,
            timeoutPromise
        ]);

        const responseIter = response[Symbol.asyncIterator]();

        const data = (async function* () {
            try {
                while (true) {

                    const item = await Promise.race([
                        responseIter.next(),
                        cancelPromise,
                        timeoutPromise
                    ]);
                    if (item.done) {
                        break;
                    }
                    yield item.value;
                }

            } catch (error) {

                abort(request._currentRequest);
                throw error
            }
        })();
        return {
            dataStream: Readable.from(data),
            originalResponse: response, // The original
        };
    }

    return {
        makeRequestIter,
        cancel() {
            const customError = new Error('Request cancelled')
            customError.code = 'ERR_REQUEST_CANCELLED'
            cancelPromiseReject(customError)
        }
    }
}




module.exports = makeRequest;



/**
 * 
 * @param {ClientRequest} request 
 */
function abort(request) {
    const majorNodeVersion = process.versions.node.split('.')[0];
    // debugger
    if (!majorNodeVersion || majorNodeVersion < 14) {
        request.abort()

    } else {
        request.destroy()
    }
}