Mime Type error when setting up Draco Wasm module

Help & Support
#1

Hi,
I’m trying to load a draco compressed GLB file. I’m using the 'DRACO GLB" example (from githug) as an example.

But when I do this:

pc.WasmModule.setConfig("DracoDecoderModule", {
    glueUrl: "../javascript/lib/draco/draco.wasm.js",
    wasmUrl: "../javascript/lib/draco/draco.wasm.wasm",
    fallbackUrl: "../javascript/lib/draco/draco.js",
});
pc.WasmModule.getInstance("DracoDecoderModule", demo);

(note that I double checked that the files are present on the indicated locations)

I get this error:

image
image1426×190 15.5 KB

Something wrong with Mime Type. I have no ideas what that means. I learned a lot last weeks, but this is new for me. And I could not find it out by googling yet.

How can I solve that?

#2

MIME type is how the browser identifies the resource or file being served by the server. That error looks like your server isn’t configured to serve WASM files as a WASM.

See here: Self-hosting for beginners | Learn PlayCanvas

You will need to configure your server to serve that file with the correct MIME type

#3

The error is given for the draco.wasm.js file. Which is a javascript file. And other javascript files are loaded just fine.

I’m using the ‘Live Server’ plugin for Visual Studio Code. I looked in the settings and googled for a solution how to configure this server for wasm file. But I can not find it.

#4

Oh I see. I would double check the paths in which case and check if they are correct relative to the HTML file

#5

I’m confused.
The paths are ok.
It does work when I use a phyton based server!
But I really would like to use the Live-server plugin.
Any idea why it does not accept the access, while other javascript files are read correctly?

#6

Relative to HTML or relative to the javascript file with the code?

#7

I’m completely confused now because it works now both with:

pc.WasmModule.setConfig("DracoDecoderModule", {
    glueUrl: "../javascript/lib/draco/draco.wasm.js",
    wasmUrl: "../javascript/lib/draco/draco.wasm.wasm",
    fallbackUrl: "../javascript/lib/draco/draco.js",
});

or

pc.WasmModule.setConfig("DracoDecoderModule", {
    glueUrl: "./javascript/lib/draco/draco.wasm.js",
    wasmUrl: "./javascript/lib/draco/draco.wasm.wasm",
    fallbackUrl: "./javascript/lib/draco/draco.js",
});

(note the single or double dots at the beginning of the paths)

How can that be possible?
Are the files cached? I closed both server and browser in between.

#8

Possibly. You do a force refresh (Shift + Cmd + R) or open devtools and under the network tab, tick ‘Disable Cache’

#9

Nope, looks like a Live Server plugin issue that you are using. You may want to reach out to the author