https://github.com/kleisauke/cf-worker-wasm-vips

Experiment with running wasm-vips on Cloudflare Workers.
https://github.com/kleisauke/cf-worker-wasm-vips

Last synced: 18 days ago
JSON representation

Experiment with running wasm-vips on Cloudflare Workers.

• Host: GitHub
• URL: https://github.com/kleisauke/cf-worker-wasm-vips
• Owner: kleisauke
• License: mit
• Created: 2022-06-08T19:38:31.000Z (over 2 years ago)
• Default Branch: main
• Last Pushed: 2023-08-17T10:44:07.000Z (about 1 year ago)
• Last Synced: 2024-10-10T00:13:28.453Z (about 1 month ago)
• Language: TypeScript
• Size: 33.2 KB
• Stars: 8
• Watchers: 6
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# cf-worker-wasm-vips

An experiment with running [wasm-vips](https://github.com/kleisauke/wasm-vips)

on [Cloudflare Workers](https://workers.cloudflare.com/).

> [!WARNING]

> wasm-vips in its current form can never run on Cloudflare workers.  

> See https://github.com/kleisauke/wasm-vips/issues/2#issuecomment-1187416552

> for details.

## Status

This experiment currently fails with:

```

worker.js onmessage() captured an uncaught exception: RuntimeError: memory access out of bounds

RuntimeError: memory access out of bounds

   at g_thread_proxy (wasm://wasm/0281634a:wasm-function[6132]:0x3c2b79)

   at h.invokeEntryPoint (polyfill.js:1816:23)

   at onmessage (polyfill.js:4353:35)

   at callFun (polyfill.js:4404:9)

   at Worker2.runPostMessage (polyfill.js:4410:7)

```

Since the `WebAssembly.Memory` in [the Web Worker polyfill](

lib/polyfill.ts) is not shared with the worker that instantiated

wasm-vips. See this `FIXME`:

https://github.com/kleisauke/cf-worker-wasm-vips/blob/9f0c4c837a7ca85b54ddeb26d97325c70bebda1b/lib/polyfill.ts#L60

Cloudflare only allows to pass a string or binary data via

[WebSocket connections](

https://github.com/cloudflare/workerd/blob/cae438f99d3e070e5530dbf42f338ee3392e68ae/src/workerd/api/web-socket.h#L62),

which won't work for [Emscripten's pthread](

https://emscripten.org/docs/porting/pthreads.html) integration.

It requires an API that allows sharing Wasm memory between workers.