Rust examples for WasmEdge

Simple Rust applications that run in WasmEdge. They also serve as a good learning resource for the Rust language.

Prerequisites

You can just install Docker Desktop.

Or, you could install Rust and WasmEdge as follows.

curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
source "$HOME/.cargo/env"
rustup target add wasm32-wasi

curl -sSf https://raw.githubusercontent.com/WasmEdge/WasmEdge/master/utils/install.sh | sudo bash -s -- -p /usr/local

Note: Running cargo build in any package directory the output will get stored at parent directory of folder because of Cargo Workspace.

├── Cargo.lock
├── Cargo.toml
├── control
├── function
├── hello
├── move
├── README.md
├── server
├── string
├── struct
├── target # Your Build files
└── wasi

Standalone examples

This set of examples demonstrate Rust apps that each has a main() function and can be started and executed a standalone app.

The standalone applications are dockerized so that you can get started easily.

• Hello world
• Working with strings
• Ownership and move
• Control flows
• Data types and structures
• Functions and return values
• Use OS system libraries
• Create an HTTP server

Library examples

This set of examples demonstrate Rust library functions that can be called from outside of the WasmEdge Runtime (i.e., in a host application).

• Add two numbers
• Pass a string to the function
• Parse JSON

More examples

For Rust apps that compile to Wasm and run inside WasmEdge.

• High-performance HTTP services using the hyper_wasi crate
• HTTP clients using the reqwest_wasi crate
• HTTPS clients using the http_req_wasi crate
• Database applications
• An HTTP microservice with a MySQL backend
• A Kafka service with a MySQL backend
• ETL functions for databases
• Complex microservices with Dapr
• Tensorflow, Pytorch and OpenVINO apps

For Rust apps that embed WasmEdge apps and provide host functions to WasmEdge.

• WasmEdge Rust SDK examples