Problem with whisper.wasm on local browser

[jake1271]

Was wondering if you guys could help with getting whisper.wasm working properly on my local browser.
Everything seems to work fine except when loading the model. When I select a model from my local machine I get the following error in the console:

(index):262 Uncaught TypeError: Module.FS_createDataFile is not a function
at storeFS ((index):262:24)
at reader.onload ((index):283:21)

When I select an audio file it seems to load fine and only cuts the first 120 seconds.

Any ideas on what the issue could be?

[andreineamtu]

I have the same problem running the stream.wasm on my local machine.
After it finishes loading the model I get the same error.

[sscotti]

I have not done much coding for a few months now, but this like a very interesting project now. Getting it to run in a browser locally using .wasm could have some great applications. Are you still having issues with this ? Also, can the project otherwise run locally on an M1 MacBook Pro and also locally on an older iMac 2014 with an Intel Chip ?

I occasionally communicate with some person in China who seems like a C++ NInja. Maybe he could help if he has not already contributed to this project.

[damoncrockett]

Ok I just worked through this. I was using the "stream.wasm" example, but I think it applies to all the examples here. First, yeah, I had to download the model file locally. Just dropped it in the same directory I run my http server (I use python http.server). That avoids CORS issues (because the file and the server requesting it have the same origin).

However, that doesn't fix a different error, which happens first: "Uncaught ReferenceError: SharedArrayBuffer is not defined at stream.js:1:11511". Stream.js is the file that contains all the compiled WASM code and initializes a bunch of emscripten stuff like "Module" and adds a bunch of methods to it, including "FS_createDataFile". Because the SharedArrayBuffer error happens first, it prevents all the other stuff in the script from loading, and you get the Module.FS_createDataFile error.

The SharedArrayBuffer error is a security thing related to the Spectre vulnerability. Gerganov himself talks about it in another issue thread here.

In any case, I fixed this by modifying my python http server to enable cross-origin isolation by adding a couple HTTP response headers to my local server. I dropped this in a python script and ran it instead of running python -m http.server:

import http.server
import socketserver

class CORSHTTPRequestHandler(http.server.SimpleHTTPRequestHandler):
    def end_headers(self):
        self.send_header('Cross-Origin-Embedder-Policy', 'require-corp')
        self.send_header('Cross-Origin-Opener-Policy', 'same-origin')
        super().end_headers()

if __name__ == '__main__':
    PORT = 8000
    with socketserver.TCPServer(("", PORT), CORSHTTPRequestHandler) as httpd:
        print(f"Serving at port {PORT}")
        httpd.serve_forever()

Now everything works! Hope this helps, and happy to answer any follow-ups.