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Building Rust functions for Node.js to take advantage of Rust's performance, WebAssembly's security and portability, and JavaScript's ease-of-use. Demo code and recipes.

Home Page: https://www.secondstate.io/articles/getting-started-with-rust-function/

JavaScript 2.05% HTML 16.67% Rust 79.12% Dockerfile 0.07% TypeScript 0.09% Shell 0.65% Python 1.01% Go 0.17% WebAssembly 0.03% C 0.14%

wasm webassembly webassembly-tutorial rust javascript nodejs microservice tutorial getting-started beginner wasm-bindgen wasm-pack ssvm ssvmup

wasm-learning's Introduction

Learning WebAssembly, Rust, and Node.js

Brought to you by the Open source dev team at Second State. Follow us on Twitter, Facebook, LinkedIn, YouTube, or Medium.

On the server side in Node.js

Developers: Getting started building Rust + JavaScript hybrid apps for Node.js.

Rust's performance
WebAssembly's security and portability
JavaScript's ease-of-use

Quickstart: Fork this repository and start editing the source code files on GitHub. Learn more.

Hello World

Function input and return values

Passing and return values of arbitrary types from Node.js to Rust

Calling Node.js functions from Rust

RSA public key encryption

Machine learning with k-means

Inside the web browser

Those examples demonstrate how to access WASM programs from the JS engine inside web browsers.

A basic example to perform numeric computation in WASM

An example to manipulate strings in a WASM program

Learning Rust

Getting started

Command line input and output

wasm-learning's People

Contributors

Stargazers

Watchers

Forkers

pushkar-bharambe bombaybrothers ajpfoster styphoiz shusiner xdev200 mwoodpatrick itsrealaryan rendaardy kancurochat vagnihotri hedanielld mileyfu nmilenko mrmime95 prateekjaindev iamrishap vestigej chihiro2014 lambda-neko shadowkun rogervaas jianantian laodev1 viclzhu alabulei1 getong ujfj1986 darwin-systems actly coding-to-music positive-spaces-io r-asou frankswu l-jasmine plumlab dlcmh kele498 wasmerize javadoors byteshiva gudakes-h dattgoswami liushooter mjr-mu7 volland yangfan1018 satacker zouhuigang o3ol thefirstsunday katopz lux14zx tantan31418 zavalyshyn jamesatomc wijnaldum-eth davidpmahon lic17 t4v1 tieway59 kaleb47 soltrinox yuping322 metastable loxe jcjinchen mandacoin dinie nevermosby musistudio madou-sow 510mt guyoung airways tpiperatgod agongman shivaylamba danielqujun noahzweben keep-modest hammermeetnail nonumber1989 brimcg sebbiditaic srujan-nalam bamaao iq-scm imaguz shukisasakura wzymumon qianyiwen2019 guybrushtr1pw00d gyj0825 kmboyle lihqi nully0x battmdpkq guillermocalleja

wasm-learning's Issues

Issue while building the quadratic project.

I am using docker to build the quadratic project and getting this error. Need help to resolve this error.
use of undeclared type or module serde_json

issue

Where can I find "MobilenetV1/Predictions/Softmax"?

Issue while building the wasm bytecode

Hello world,

I am trying to run The k-means clustering example for machine learning
example, but while building the wasm bytecode, I am getting following error

Any idea on how to solve this?

issue2

When I run "let rect = Rect::at(x1, y1).of_size((x2 - x1) as u32 , (y2 - y1) as u32);"
errors comes:
width must be strictly positive
How can I fix it?

Add `rustup target add wasm32-wasi` into the `wasm-learning/cli/hello/` example

The hello file does not mention rustup target add wasm32-wasi before building as a beginner example. I believe it is better for newcomers.

$ rustup target add wasm32-wasi
$ cargo build --target wasm32-wasi

wasm-learning/cli/hello/README.md

Lines 11 to 16 in 191de35

 ## Build the WASM bytecode 

 ``` 

 $ cargo build --target wasm32-wasi 

 ```

The error log will be very confusing if someone forgets to add the target before building for the first time.

root@TW59:~/wasm-learning/cli/hello# cargo build --target wasm32-wasi
   Compiling hello v0.1.0 (/root/wasm-learning/cli/hello)
error[E0463]: can't find crate for `std`
  |
  = note: the `wasm32-wasi` target may not be installed
  = help: consider downloading the target with `rustup target add wasm32-wasi`

error[E0463]: can't find crate for `std`
 --> src/main.rs:1:5
  |
1 | use std::env;
  |     ^^^ can't find crate
  |
  = note: the `wasm32-wasi` target may not be installed
  = help: consider downloading the target with `rustup target add wasm32-wasi`

error: cannot find macro `println` in this scope
 --> src/main.rs:6:5
  |
6 |     println!("{}", argument);
  |     ^^^^^^^

error: cannot find macro `println` in this scope
 --> src/main.rs:4:3
  |
4 |   println!("hello");
  |   ^^^^^^^

error[E0433]: failed to resolve: use of undeclared crate or module `env`
 --> src/main.rs:5:19
  |
5 |   for argument in env::args().skip(1) {
  |                   ^^^ use of undeclared crate or module `env`

error: requires `sized` lang_item

Some errors have detailed explanations: E0433, E0463.
For more information about an error, try `rustc --explain E0433`.
error: could not compile `hello` due to 6 previous errors

Reference:

WASI-tutorial.md this file gives an shell example with add target.

Run nodejs example with c api

Hello, I‘d like to ask if I can use the official c-api to run the wasm module compiled in this project(e.g. k-means), or maybe I need some other things？

Issue running npm express on docker WSL 2

On some examples in server.js the following line does not work, missing express package in docker as well
app.use(express.static('public'));
it works when i change it to
app.use(express.static(__dirname + "/public"));

I am using WSL 2 ubuntu and i ran the following

cd /mnt/c/.../wasm-learning/
docker run -p 8080:8080 --rm -it -v $(pwd):/app ssvm-nodejs:v1
cd app
npm install express
cd quadratic
ssvmup build
node node/server.js

Update new TensorFlow API

We should use wasmedge_tensorflow_interface to replace the old ssvm_tensorflow_interface for TensorFlow functions.

Why .\wasmedge.exe --reactor .\add.wasm add -10 1 results in 4294967287?

While trying https://wasmedge.org/book/en/quick_start/run_cli.html#call-a-webassembly-function-compiled-from-rust on Windows 10 as:

.\wasmedge.exe --reactor .\add.wasm add -10 1

It returned an unexpected value of:

4294967287

Is this expected? From what I understood, the rust add example uses a rust i32 (signed integer), so this result is unexpected to me.

ocr issue

Problem:
Interpretation of the code:
"let mut host_temp_input_filename = String::from("/tmp/");"?

Roots not ready on quadratic equation example

Hi :)

I've been following the examples from the free Raspberry Pi page, and got to the quadratic equations example.

Everything seems to install and update correctly, and running the 'node test.js' example works perfectly. When I run the 'node server.js' command, it starts to go wrong though. I get the 'Listening at http://localhost:8080' message, but as soon as I open the calculator I get a 'The roots are not ready' error, and when I enter any values into the calculator and press Solve, nothing happens on the calculator page, but on the Visual Studio page, the terminal gives me a long error message. I can't copy and paste it, so I've attached a screenshot.

Do we have yolov4-tflite result parse code?

wasm-learning/faas/yolov4-tflite/src/lib.rs

Line 43 in 48f0545

// Parse results.

Here, the commented code is for tflite-ssd. So, do we have yolov4-tflite result parse code?

Live demoes not working

Tried running the live demo referenced in this article.
The demo is here: https://second-state.github.io/wasm-learning/faas/regex/html/index.html
Received:
{"return_value":"Error executing this function, please check function name, input parameters, return parameter for correctness"}
Same with this demo: https://second-state.github.io/wasm-learning/faas/hello/html/index.html

Fails to compile with go run but succeeds with go build

concerning /reactr/hello

 go run -tags wasmedge main.go
# github.com/suborbital/reactr/rwasm/runtime/wasmedge
/home/korny/go/pkg/mod/github.com/suborbital/[email protected]/rwasm/runtime/wasmedge/builder.go:43:17: undefined: wasmedge.NewWasiImportObject
/home/korny/go/pkg/mod/github.com/suborbital/[email protected]/rwasm/runtime/wasmedge/builder.go:50:20: store.FindFunction undefined (type *wasmedge.Store has no field or method FindFunction)
/home/korny/go/pkg/mod/github.com/suborbital/[email protected]/rwasm/runtime/wasmedge/builder.go:52:39: cannot use "_start" (type string) as type *wasmedge.Function in argument to executor.Invoke
/home/korny/go/pkg/mod/github.com/suborbital/[email protected]/rwasm/runtime/wasmedge/builder.go:56:15: store.FindFunction undefined (type *wasmedge.Store has no field or method FindFunction)
/home/korny/go/pkg/mod/github.com/suborbital/[email protected]/rwasm/runtime/wasmedge/builder.go:58:39: cannot use "init" (type string) as type *wasmedge.Function in argument to executor.Invoke
/home/korny/go/pkg/mod/github.com/suborbital/[email protected]/rwasm/runtime/wasmedge/builder.go:72:40: undefined: wasmedge.ImportObject
/home/korny/go/pkg/mod/github.com/suborbital/[email protected]/rwasm/runtime/wasmedge/builder.go:100:13: undefined: wasmedge.NewImportObject
/home/korny/go/pkg/mod/github.com/suborbital/[email protected]/rwasm/runtime/wasmedge/host_function.go:27:26: undefined: wasmedge.ImportObject
/home/korny/go/pkg/mod/github.com/suborbital/[email protected]/rwasm/runtime/wasmedge/wasmedge.go:13:11: undefined: wasmedge.ImportObject
/home/korny/go/pkg/mod/github.com/suborbital/[email protected]/rwasm/runtime/wasmedge/wasmedge.go:19:44: cannot use fn (type string) as type *wasmedge.Function in argument to w.executor.Invoke
/home/korny/go/pkg/mod/github.com/suborbital/[email protected]/rwasm/runtime/wasmedge/wasmedge.go:19:44: too many errors

a simple go build on the other hand compiles a binary that runs my rust-wasm code successfully.

go version go1.17.1 linux/amd64
wasmedge version 0.10.0
arch linux

	## Build the WASM bytecode

	```
	$ cargo build --target wasm32-wasi
	```