Devcontainer WASM-Go

Simple devcontainer for Go development

Usage

Github Codespaces

Just click the button:

Visual Studio Code

Note this assumes that you have the VS code support for remote containers and docker installed on your machine.

git clone https://github.com/dev-wasm/dev-wasm-go
cd dev-wasm-go
code ./

Visual studio should prompt you to see if you want to relaunch the workspace in a container, you do.

Building and Running

Simple example

# Build with TinyGo
tinygo build -target=wasi -o main.wasm main.go
# Or Build with Golang native
GOOS=wasip1 GOARCH=wasm go build -o main.wasm main.go

# Run it
wasmtime --dir .::/ main.wasm

WASM Web serving with WASI-HTTP

There is an example of web serving via the WASI-HTTP API in webserver/wasi-http.

To build:

# Install the wit interface files, this only needs to be done once.
cd lib/wasi
make wasi-http

# Return to root
cd ../../

# Build the wasm component
cd webserver/wasi-http
make clean
make default
make run

Once it is running you can connect to it via http://localhost:8080

WASM CGI web serving with lighttpd

There is an example of web serving via WebAssembly + CGI (WAGI) in the webserver/wagi directory. It uses the lighttpd web server and mod_cgi. See the webserver/lighttpd.conf file for more details.

tinygo build -target=wasi -o wagi.wasm webserver/wagi.go
lighttpd -D -f webserver/lighttpd.conf

Once the server is running, VS Code or Codespaces should prompt you to connect to the open port.

HTTP Client Example

There is a more complicated example in the http directory which shows an example of making an HTTP client call using the experimental wasi-http support in wasmtime.