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import {IncomingMessage, OutgoingHttpHeaders} from 'http';

import * as https from 'https';

import * as url from 'url';

/**

* Function to fetch a URL

* @param input_url

* @param auth_token

* @param redirect_count

export async function fetch(

input_url: string,

auth_token?: string,

redirect_count = 5

): Promise<Record<string, string>> {

const fetch_promise: Promise<Record<string, string>> = new Promise(

resolve => {

const url_object: url.UrlObject = new url.URL(input_url);

const headers: OutgoingHttpHeaders = {

'User-Agent': `Mozilla/5.0 (${process.platform} ${process.arch}) setup-php`

};

if (auth_token) {

headers.authorization = 'Bearer ' + auth_token;

}

const options: https.RequestOptions = {

hostname: url_object.hostname,

path: url_object.pathname,

headers: headers,

agent: new https.Agent({keepAlive: false})

};

const req = https.get(options, (res: IncomingMessage) => {

if (res.statusCode === 200) {

let body = '';

res.setEncoding('utf8');

res.on('data', chunk => (body += chunk));

res.on('end', () => resolve({data: `${body}`}));

} else if (

[301, 302, 303, 307, 308].includes(res.statusCode as number)

) {

if (redirect_count > 0 && res.headers.location) {

fetch(res.headers.location, auth_token, redirect_count--).then(

resolve

);

} else {

resolve({error: `${res.statusCode}: Redirect error`});

}

} else {

resolve({error: `${res.statusCode}: ${res.statusMessage}`});

}

});

req.end();

}

);

return await fetch_promise;

}