Fetching an image from a website with Node.js - node.js

Question

I'm in the process of making my own Discord bot and I have no previous experience with JS. I'm making a feature that downloads and posts an image from this website: http://random.dog
I have successfully downloaded images from elsewhere when I know the exact link to the picture. Here's the relevant part of my code:
var download = function(uri, filename, callback){
request(uri).pipe(fs.createWriteStream(filename)).on('close', callback);}
download('http://random.dog/14769-27888-18622.jpg', 'dog.png',
I'm using this request module https://www.npmjs.com/package/reques , is it possible to get images without the exact URL, with that module?

Answer 1

this who you can fetch URL dynamicaly and download picture with name you need these two module request-promise, cheerio,
var app = require('express')();
var http = require('http').Server(app);
fs = require('fs');
var fs = require('fs'),
request = require('request');
//save image
var download = function(uri, filename, callback){
request.head(uri, function(err, res, body){
request(uri).pipe(fs.createWriteStream(filename)).on('close', callback);
});
};
//get URL
var Imgpath="";
var rp = require('request-promise'),
cheerio = require('cheerio'),
url = require('url'),
base = 'http://random.dog/';
var options = {
uri: base,
method: 'GET',
resolveWithFullResponse: true
};
rp(options)
.then (function (response) {
$ = cheerio.load(response.body);
var relativeLinks = $("img");
relativeLinks.each( function() {
var link = $(this).attr('src');
var fullImagePath = url.resolve(base, link); // should be absolute
//pass to download to download image link is file name and base is base url
download(base+link,link,function()
{
console.log("wao great we done this...THINK DIFFERENT")
})
});
});
app.listen(3000);
console.log("server start");
app.get('/',function(req,res){
res.sendfile(__dirname + '/a.html');
});