Compile and Upload Tinygo WASM to Val Town Using Deno

Make a Go program like so:

package main

import (
	"fmt"
	"net/http"
	gotown "github.com/maxmcd/go-town"
)

func main() {
	gotown.ListenAndServe(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		fmt.Fprintf(w, "Hello World")
	}))
}

Make sure you have tinygo (and optionally wasm-strip) installed. Then run this command with Deno to invoke this script:

 deno run --allow-net --allow-run --allow-read \
    "https://esm.town/v/maxm/compileAndUploadTinygoWasm?v=58"

That will print out the following:

Running tinygo build -o main.wasm -target=wasi .
Compliation complete
Running wasm-strip main.wasm

Copy the following into a val town HTTP val:

import { wasmHandler } from "https://esm.town/v/maxm/tinygoHttp";
const resp = await fetch("https://maxm-wasmBlobHost.web.val.run/jpxqvyy5tphiwehzklmioklpkpz4gpzs.wasm");
const handler = await wasmHandler(new Uint8Array(await resp.arrayBuffer()));
export default async function(req: Request): Promise<Response> {
  return handler(req);
}

Copy that into a Val and you have a working Go http handler! View that example here: https://www.val.town/v/maxm/crimsonMacaw

Migrated from folder: wasm/compileAndUploadTinygoWasm