Node.js, parse filename from URL

Question

How can I parse a url?

site.com:8080/someFile.txt?attr=100

or

site.com:8080/someFile.txt/?attr=100

I need to get someFile.txt, where is a file name I set by myself as the format (txt or some other).

UPDATE

I tried

var path = url.parse(req.url).path;

But I still cannot get the path (someFile.txt).

You should mention all the details from the beginning. - nodejs.org/docs/latest/api/url.html — Cheery
– Cheery, Commented Nov 18, 2014 at 23:50
Yes. It could be any file on server (i.e. Kitty.jpg or order.json). — Aaron
– Aaron, Commented Nov 18, 2014 at 23:54
Is the URL guaranteed to be in this format? Will there ever be a leading http:// — Cory Danielson
– Cory Danielson, Commented Nov 18, 2014 at 23:57

Cheery · Accepted Answer · 2014-11-19 00:00:27Z

95

Something like this..

var url = require("url");
var path = require("path");
var parsed = url.parse("http://example.com:8080/test/someFile.txt/?attr=100");
console.log(path.basename(parsed.pathname));

edited Nov 19, 2014 at 0:00

answered Nov 18, 2014 at 23:46

Cheery

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6 Comments

Aaron Over a year ago

I use node.js server. And I try to parse the code on server side.

Toolkit Over a year ago

i just did and it is /test/someFile.txt/

James Sullivan Over a year ago

path.posix.basename will return the filename on windows and linux, path.basename only returns filename on windows nodejs.org/api/path.html#path_windows_vs_posix

Luke Over a year ago

This prints escaped characters, this should be: console.log(decodeURIComponent(path.basename(parsed.pathname)));

Cheery Over a year ago

@LiamPillay this method is deprecated. use new URL("url here")

|

Alex G · Accepted Answer · 2021-05-14 01:52:06Z

10

here's my working code, hope it helps

import path from 'path'

const getBasenameFormUrl = (urlStr) => {
    const url = new URL(urlStr)
    return path.basename(url.pathname)
}

answered May 14, 2021 at 1:52

Alex G

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Comments

scientist strong · Accepted Answer · 2022-11-15 15:40:06Z

2

decodeURIComponent(path.basename('http://localhost/node-v18.12.1-x64.msi'))

node-v18.12.1-x64.msi

answered Nov 15, 2022 at 15:40

scientist strong

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Comments

dakab · Accepted Answer · 2016-06-18 13:42:36Z

Your example can easily be dealt with using Node.js’s url module:

var URL = require('url').parse('site.com:8080/someFile.txt?attr=100');
console.log(URL.pathname.replace(/(^\/|\/$)/g,'')); // "someFile.txt"

However, this doesn’t work with Node.js’s exemplary URL (’cause it’s got more path).

By truncanting the complete path starting at its rightmost slash, it’ll yield the file name:

var URL = require('url').parse('http://user:[email protected]:8080/p/a/t/h?query=string#hash');
console.log(URL.pathname.substring(URL.pathname.lastIndexOf('/')+1)); // "h"

And if that idea is considered safe enough for the appliance, we can do it plain:

var file = url.substring(url.lastIndexOf('/')+1).replace(/((\?|#).*)?$/,'');
                              /* hashes and query strings ----^  */

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