file_size_url is a simple Node.js library for fetching the size of a file from a given URL using either HTTP or HTTPS protocols. It returns the file size in a human-readable format such as "1.23 MB".
0 dependencies.
You can install the library via npm:
npm install file_size_urlAlternatively, if you have the source code, you can directly use the function in your Node.js project:
# Simply copy the source code file to your project directoryimport fileSizeUrl from 'file_size_url';
fileSizeUrl("https://example.com/file.zip")
.then(size => console.log(`File size: ${size}`))
.catch(error => console.error(`Error: ${error.message}`));You can integrate file_size_url with telegraf to fetch and display file sizes in your Telegram bot:
import { Telegraf } from 'telegraf';
import fileSizeUrl from 'file_size_url';
const bot = new Telegraf('<YOUR_BOT_TOKEN>');
bot.command('filesize', async (ctx) => {
const url = ctx.message.text.split(' ')[1];
if (!url) return ctx.reply('Please provide a URL.');
try {
const size = await fileSizeUrl(url);
ctx.reply(`File size: ${size}`);
} catch (error) {
ctx.reply(`Error: ${error.message}`);
}
});
bot.launch();You can use file_size_url in an express.js server to get file sizes via an API:
import express from 'express';
import fileSizeUrl from 'file_size_url';
const app = express();
app.get('/filesize', (req, res) => {
const { url } = req.query;
if (!url) return res.status(400).send('URL parameter is required');
fileSizeUrl(url)
.then(size => res.send(`File size: ${size}`))
.catch(error => res.status(500).send(`Error: ${error.message}`));
});
app.listen(3000, () => {
console.log('Server is running on port 3000');
});You can easily use file_size_url inside a loop to fetch file sizes from multiple URLs:
import fileSizeUrl from './file_size_url.js';
const urls = [
'https://example.com/file1.zip',
'https://example.com/file2.zip',
'https://example.com/file3.zip'
];
urls.forEach(async (url) => {
try {
const size = await fileSizeUrl(url);
console.log(`File size for ${url}: ${size}`);
} catch (error) {
console.error(`Error fetching size for ${url}: ${error.message}`);
}
});Fetch file sizes concurrently for multiple URLs using Promise.all:
import fileSizeUrl from './file_size_url.js';
const urls = [
'https://example.com/file1.zip',
'https://example.com/file2.zip',
'https://example.com/file3.zip'
];
Promise.all(urls.map(url => fileSizeUrl(url)))
.then(sizes => {
sizes.forEach((size, index) => {
console.log(`File size for ${urls[index]}: ${size}`);
});
})
.catch(error => console.error(`Error: ${error.message}`));Fetches the file size from a given URL.
- url (
string): The URL of the file.
- Promise: Resolves with the file size as a formatted string (e.g., "1.23 MB"). If an error occurs, the promise is rejected with an error message.
fileSizeUrl("https://example.com/file.zip")
.then(size => console.log(`File size: ${size}`))
.catch(error => console.error(`Error: ${error.message}`));Invalid URL: If the URL is invalid or missing.The address should be http or https: If the protocol is not supported.Failed to get file size, status code: <statusCode>: If the HTTP status code is not 200.Couldn't retrieve file size from headers: If thecontent-lengthheader is missing or invalid.
Formats bytes into a human-readable string.
- bytes (
number): The number of bytes.
- string: The formatted size string (e.g., "1.23 MB").
console.log(formatBytes(12345678)); // Output: "11.77 MB"- Make sure the URL starts with
http://orhttps://. - The library is designed to work only in Node.js environments that support the native
httpandhttpsmodules.
This library is available under the MIT License.