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https://github.com/mhchia/test-ws-stream-wasm
https://github.com/mhchia/test-ws-stream-wasm
Last synced: 20 days ago
JSON representation
- Host: GitHub
- URL: https://github.com/mhchia/test-ws-stream-wasm
- Owner: mhchia
- Created: 2023-09-06T10:37:56.000Z (about 1 year ago)
- Default Branch: main
- Last Pushed: 2023-09-06T11:46:43.000Z (about 1 year ago)
- Last Synced: 2024-10-13T15:03:52.705Z (about 1 month ago)
- Language: Rust
- Size: 134 KB
- Stars: 0
- Watchers: 2
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# test-ws-stream-wasm
This is a reproduction for `ws-stream-wasm` failing with nightly and rust rustflags `+atomics,+bulk-memory,+mutable-globals`.
## Issue
With the settings above, it fails when we try to write to a websocket (`io_stream`).
```bash
let ws_server_url = "ws://localhost:12345";
let (mut ws_meta, mut ws_stream) = WsMeta::connect(ws_server_url, None ).await
.expect_throw( "assume the client ws connection succeeds" );
let mut io_stream = ws_stream.into_io();
let message = b"Hello from browser".to_vec();
io_stream
.write(&message).await
.expect_throw( "Failed to write to websocket" );
```
My environment:
- OS: macOS 12.6
- cargo: 1.68.0-nightly (70898e522 2022-12-05)
- rustc: 1.68.0-nightly (bdb07a8ec 2022-12-11)
- Chrome: Version 116.0.5845.140 (Official Build) (x86_64)
## Reproduction
### Step 1: Clone the repo
```bash
git clone [email protected]:mhchia/test-ws-stream-wasm.git
```
### Step 2: Install wasm-pack
```bash
yarn global add wasm-pack
```
### Step 3: Use nightly rust
Creating a file `rust-toolchain` with the content `nightly-2022-12-12` under this project root.
```bash
echo "nightly-2022-12-12" > rust-toolchain
```
### Step 4: Use rustflags `+atomics,+bulk-memory,+mutable-globals`
Add a file `.cargo/config` under this project root with the following content, as wasm-bindgen-rayon [suggested](https://github.com/GoogleChromeLabs/wasm-bindgen-rayon#using-config-files).
```bash
[target.wasm32-unknown-unknown]
rustflags = ["-C", "target-feature=+atomics,+bulk-memory,+mutable-globals"]
[unstable]
build-std = ["panic_abort", "std"]
```
### Step 5: Start a websocket server
Open a terminal and run the following commands to start a websocket server, which prints the messages received from the client.
```bash
cd ws-server
yarn install
yarn start
```
### Step 6: Build wasm and run a web server
Open another terminal and run
```bash
yarn build-and-start
```
Open the page `http://localhost:8080` in your browser. A websocket from `ws-stream-wasm` then try sending a message to the websocket server from Step 5. It should **fail** with the following error message.
### Step 7: Remove the file `.cargo/config` and try again
Remove the file `.cargo/config`, run `yarn build-and-start` again, and open the page `http://localhost:8080` in your browser. It should **succeed**, and you can see `Successfully sent message to server` in your browser console.