🐛 BUG: Import #5 module="env" error

[makorne]

What version of Wrangler are you using?

2.4.4

What operating system are you using?

Fedora 36

Describe the Bug

I add to rustwasm-worker-template the following:

In dependences:

serde = "1"
jsonwebtoken = "8"

In lib.rs:

use jsonwebtoken::{ encode, Header, EncodingKey };
use serde::{Deserialize, Serialize};

#[derive(Debug, Serialize, Deserialize)]
struct Claims {
    sub: String,
}

In main():

let my_claims = Claims {
      sub: "[email protected]".to_owned(),
};
let token = encode(&Header::default(), &my_claims, &EncodingKey::from_secret("secret".as_ref())).unwrap();

And get this error:

TypeError: WebAssembly.Instance(): Import cloudflare/wrangler2#5 module="env" error: module is not an object or function
    at /home/dan/cloudflare/rustwasm-worker-template/build/worker/shim.mjs:1:2975
    at SourceTextModule.evaluate (node:internal/vm/module:224:23)
    at VMScriptRunner.runAsModule (/home/dan/cloudflare/node_modules/wrangler/node_modules/@miniflare/runner-vm/src/index.ts:38:18)
    at VMScriptRunner.run (/home/dan/cloudflare/node_modules/wrangler/node_modules/@miniflare/runner-vm/src/index.ts:82:17)
    at Miniflare.#reload (/home/dan/cloudflare/node_modules/@miniflare/core/src/index.ts:775:13)
    at Miniflare.getPlugins (/home/dan/cloudflare/node_modules/@miniflare/core/src/index.ts:1017:5)
    at createServer (/home/dan/cloudflare/node_modules/wrangler/node_modules/@miniflare/http-server/src/index.ts:369:19)
✘ [ERROR] Miniflare process exited with code 1

[zebp]

This is because ring currently doesn't support WASM so it's trying to link some C that it compiles which doesn't work on the WASM target. You might have some luck with jwt-compact which seems to support WASM, I got a similar example to yours working without any issues. If that still doesn't work it might be time to try writing your Worker in TypeScript and use a library like workers-jwt.

[mikeumus]

I tried porting what I had over to jwt-compact and my routes stopped responding with anything. It was weird. Other get/post routes would but couldn't log even the beginning of a .post route (non-async nor async). It's sad that Workers is Javascript under the hood and not just Rust. I have to find some other cloud provider now 😢

[21eleven]

I tried jwt-compact and that worked for me 🎉