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app.js
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app.js
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'use strict';
const fs = require('fs');
const request = require('request');
const cheerio = require('cheerio');
const writeFile = (uri, fileName) => {
console.log('Will download', fileName);
const fileRequest = request(uri)
.pipe(
fs.createWriteStream(fileName)
);
fileRequest.on('error', function(err) {
console.log(err);
});
fileRequest.on('close', function(response){
console.log(`File ${fileName} was successfully downloaded!`);
});
}
//let url = 'http://pressbooks.com/sample-books/';
let url = process.env.URL;
let extension = process.env.EXTENSION;
request(url, (error, response, html) => {
if(!error){
let $ = cheerio.load(html);
let anchorTag = $('a');
let regex = new RegExp(extension+'$');
// Links
$(anchorTag).each((i, a) =>{
let fileUrl = $(a).attr('href');
if(regex.test(fileUrl)) {
let fileName = decodeURI(fileUrl).match(/[^/]*$/g)[0];
let isRemoteRoute = (/^http(?:s)?:\/\//).test($(a).attr('href'));
if(isRemoteRoute){
writeFile(fileUrl, fileName);
}else{
writeFile(url + fileUrl, fileName);
}
}
});
}else{
console.log(error);
}
});