Support for data URLs and object URLs

[qwerasd205]

Data URLs and Object URLs (generally of blobs) are frequently used to dynamically create Workers -- support for these is missing in Deno which presents a compatibility issue with existing web code, and is an issue when trying to create workers from strings in Deno.

What's missing:

• Support for the data: scheme for URLs
• Support for object URLs and URL.createObjectURL() (Solved by Implement Blob url support for worker #2729)

[Fenzland]

This feature also need for importing.
The follow codes work in browsers but dosn't in deno yet.

import value from 'data:application/javascript,export%20default%201%3B';

import (`data:application/javascript,${encodeURIComponent('export default 1;')}`).then(x=>console.log(x.default));

dynamic import with data-url is a good way to take place of eval(). So it's a essential feature.

[kitsonk]

Here is the relevant discussion in Node.js: nodejs/node#28614. There are some security concerns with allowing this, but I guess the same applies for doing it with web workers.

[Fenzland]

@kitsonk It does not bring new security problems. We can write the code to a file and import it to do the same thing. The only difference is slowness. An --allow-*** flag will be OK.

[dsseng]

It can be implemented using https://docs.rs/data-url/0.1.0/data_url/

[EliteScientist]

My product is having the same issue. we need to dynamically create Workers and support dynamic imports from blob or object urls.

I'm using 1.4.5