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feat: allows registering multiple wasm instances

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This commit is contained in:
Nicolas Lepage
2025-11-21 00:57:18 +01:00
parent 9ff6ec615a
commit 9ae9f3c443
23 changed files with 300 additions and 145 deletions
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27
docs/hello-multiple/api.go Normal file
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package main
import (
"encoding/json"
"fmt"
"net/http"
"os"
wasmhttp "github.com/nlepage/go-wasm-http-server/v2"
)
var binaryName = ""
func main() {
http.HandleFunc("/hello", func(res http.ResponseWriter, req *http.Request) {
res.Header().Add("Content-Type", "application/json")
if err := json.NewEncoder(res).Encode(map[string]string{
"message": fmt.Sprintf("Hello from %s at path %s", binaryName, os.Getenv("WASM_HTTP_PATH")),
}); err != nil {
panic(err)
}
})
wasmhttp.Serve(nil)
select {}
}

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docs/hello-multiple/api1.wasm Executable file
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docs/hello-multiple/api2.wasm Executable file
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3
docs/hello-multiple/build.sh Executable file
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#!/bin/sh
GOOS=js GOARCH=wasm go build -o api1.wasm --ldflags="-X 'main.binaryName=api1.wasm'" .
GOOS=js GOARCH=wasm go build -o api2.wasm --ldflags="-X 'main.binaryName=api2.wasm'" .

29
docs/hello-multiple/index.html Normal file
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<!DOCTYPE html>
<html>
<head>
<title>go-wasm-http-server hello demo</title>
<script>
navigator.serviceWorker.register('sw.js');
async function hello() {
const api = document.querySelector('#api').value;
const res = await fetch(`${api}/hello`);
const { message } = await res.json();
alert(message);
}
</script>
</head>
<body>
<label for="api">API: </label
><select id="api">
<option value="api1/1">api1.wasm first instance</option>
<option value="api1/2">api1.wasm second instance</option>
<option value="api2/1">api2.wasm first instance</option>
<option value="api2/2">api2.wasm second instance</option>
</select>
<button onclick="hello()">Hello</button>
</body>
</html>

15
docs/hello-multiple/sw.js Normal file
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importScripts('https://cdn.jsdelivr.net/gh/golang/go@go1.25.1/lib/wasm/wasm_exec.js');
importScripts('https://cdn.jsdelivr.net/gh/nlepage/go-wasm-http-server@master/sw.js');
addEventListener('install', (event) => {
event.waitUntil(caches.open('examples').then((cache) => cache.addAll(['api1.wasm', 'api2.wasm'])));
});
addEventListener('activate', (event) => {
event.waitUntil(clients.claim());
});
registerWasmHTTPListener('api1.wasm', { base: 'api1/1/' });
registerWasmHTTPListener('api1.wasm', { base: 'api1/2/' });
registerWasmHTTPListener('api2.wasm', { base: 'api2/1/' });
registerWasmHTTPListener('api2.wasm', { base: 'api2/2/' });