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add browser-go template
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‎_templates/browser/browser-go/.gitignore‎

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build
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node_modules
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.wrangler

‎_templates/browser/browser-go/README.md‎

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# browser-go
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- A template for starting a browser-based HTTP server with Go.
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- This template uses Cloudflare Workers to just serve a static page.
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- This template uses [`workers`](https://github.com/syumai/workers) package to run an HTTP server.
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## Usage
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- `main.go` includes simple HTTP server implementation. Feel free to edit this code and implement your own HTTP server.
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## Requirements
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- Node.js
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- Go 1.24.0 or later
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## Getting Started
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- Create a new worker project using this template.
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```console
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npm create cloudflare@latest -- --template github.com/syumai/workers/_templates/browser/browser-go
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```
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- Initialize a project.
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```console
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cd my-app
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go mod init
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go mod tidy
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npm start # start running dev server
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```
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Then, open http://localhost:8787 in your browser.
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## Development
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### Commands
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```
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npm start # run dev server
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npm run build # build Go Wasm binary
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npm run deploy # deploy static assets
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```

‎_templates/browser/browser-go/main.go‎

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package main
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import (
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"bytes"
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"fmt"
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"io"
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"net/http"
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"github.com/syumai/workers"
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)
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func main() {
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http.HandleFunc("/hello", func(w http.ResponseWriter, req *http.Request) {
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name := req.URL.Query().Get("name")
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if name == "" {
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name = "World"
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}
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msg := fmt.Sprintf("Hello, %s!", name)
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w.Write([]byte(msg))
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})
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http.HandleFunc("/echo", func(w http.ResponseWriter, req *http.Request) {
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b, err := io.ReadAll(req.Body)
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if err != nil {
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panic(err)
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}
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io.Copy(w, bytes.NewReader(b))
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})
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workers.Serve(nil) // use http.DefaultServeMux
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}

‎_templates/browser/browser-go/package.json‎

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{
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"name": "<TBD>",
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"version": "0.0.0",
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"private": true,
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"scripts": {
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"build": "go run github.com/syumai/workers/cmd/workers-assets-gen -mode=go -runtime=browser -o ./public/build && GOOS=js GOARCH=wasm go build -o ./public/build/app.wasm .",
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"deploy": "wrangler deploy",
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"dev": "wrangler dev",
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"start": "wrangler dev"
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},
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"devDependencies": {
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"wrangler": "^4.9.1"
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}
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}

‎_templates/browser/browser-go/public/index.html‎

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<!doctype html>
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<html>
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<head>
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<title>Go HTTP Server in the Browser</title>
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</head>
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<body>
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<h1>Go HTTP Server in the Browser</h1>
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<form id="app">
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<div>
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<label>
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Path
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<select name="path">
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<option value="hello">/hello</option>
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<option value="echo">/echo</option>
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</select>
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</label>
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</div>
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<div>
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<label>
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Name (for hello)
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<input type="text" name="name" value="Name" />
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</label>
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</div>
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<div>
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<label>
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<label>
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Message (for echo)
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<input type="text" name="message" value="Message" />
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</label>
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</div>
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<button type="submit">Send</button>
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</form>
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<h2>Result</h2>
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<div id="result"></div>
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<script src="./index.mjs" type="module"></script>
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</body>
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</html>

‎_templates/browser/browser-go/public/index.mjs‎

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import handlers from "./build/worker.mjs";
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const appForm = document.getElementById("app");
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const resultContainer = document.getElementById("result");
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const paths = {
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hello: "/hello",
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echo: "/echo",
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};
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const methods = {
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hello: "GET",
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echo: "POST",
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};
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appForm.addEventListener("submit", async (e) => {
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e.preventDefault();
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const formData = new FormData(e.target);
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const path = formData.get("path");
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const message = formData.get("message");
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const name = formData.get("name");
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let url = paths[path];
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if (path === "hello") {
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url = `${url}?name=${encodeURIComponent(name)}`;
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}
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const req = new Request(url, {
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method: methods[path],
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body: path === "echo" ? message : undefined,
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});
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const res = await handlers.fetch(req);
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const text = await res.text();
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resultContainer.textContent = text;
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});

‎_templates/browser/browser-go/wrangler.jsonc‎

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{
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"$schema": "node_modules/wrangler/config-schema.json",
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"name": "<TBD>",
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"compatibility_date": "<TBD>",
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"build": {
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"command": "npm run build"
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},
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/**
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* Static Assets
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* https://developers.cloudflare.com/workers/static-assets/binding/
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*/
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"assets": {
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"directory": "./public",
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"html_handling": "drop-trailing-slash"
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}
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}

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