Read zip file from URL to ArrayBuffer with Javascript

Question

I have a front end javascript library into which I'm attempting to load a zip file. The libraries documentation suggests that if I wish to be loading a zip file from a URL (I do) then I need to have the data in an arraybuffer.

As I'm not a Javascript person I'm having some trouble discerning how I might be able to do this.

The code I believe that I ultimately need to use is the following, where I assume buffer is the name of my buffer:

shp(buffer).then(function(geojson){});
//or
shp.parseZip(buffer)->returns zip

So the question is, if I have a file at example.com/myfile.zip how do I use vanilla javascript to get that into an ArrayBuffer? I assume once that is done I'll have what I need to feed into that code snippet above.

Plenty of googleing keeps getting me results that don't seem relevant. The File_API docs by Mozilla don't provide an example that I can see.

Unmitigated · Accepted Answer · 2021-07-09 13:40:12Z

1

You can use fetch.

fetch('example.com/myfile.zip').then(res => res.arrayBuffer()).then(arrayBuffer => {
    // use ArrayBuffer
});

edited Jul 9, 2021 at 13:40

answered Jul 9, 2021 at 0:13

Unmitigated

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1 Comment

Unmitigated Over a year ago

@anakaine Happy to help.

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