From 058165ca1c90cb07bc294c17ab5fb08ed111f5e1 Mon Sep 17 00:00:00 2001
From: syumai <syumai@gmail.com>
Date: Sun, 30 Apr 2023 11:54:32 +0900
Subject: [PATCH] add worker-go template

---
 _templates/cloudflare/worker-go/.gitignore    |  1 +
 _templates/cloudflare/worker-go/Makefile      | 12 ++++
 _templates/cloudflare/worker-go/README.md     | 58 +++++++++++++++++++
 _templates/cloudflare/worker-go/main.go       | 24 ++++++++
 _templates/cloudflare/worker-go/wrangler.toml |  9 +++
 5 files changed, 104 insertions(+)
 create mode 100644 _templates/cloudflare/worker-go/.gitignore
 create mode 100644 _templates/cloudflare/worker-go/Makefile
 create mode 100644 _templates/cloudflare/worker-go/README.md
 create mode 100644 _templates/cloudflare/worker-go/main.go
 create mode 100644 _templates/cloudflare/worker-go/wrangler.toml

diff --git a/_templates/cloudflare/worker-go/.gitignore b/_templates/cloudflare/worker-go/.gitignore
new file mode 100644
index 0000000..c795b05
--- /dev/null
+++ b/_templates/cloudflare/worker-go/.gitignore
@@ -0,0 +1 @@
+build
\ No newline at end of file
diff --git a/_templates/cloudflare/worker-go/Makefile b/_templates/cloudflare/worker-go/Makefile
new file mode 100644
index 0000000..fe89215
--- /dev/null
+++ b/_templates/cloudflare/worker-go/Makefile
@@ -0,0 +1,12 @@
+.PHONY: dev
+dev:
+	wrangler dev
+
+.PHONY: build
+build:
+	go run github.com/syumai/workers/cmd/workers-assets-gen@latest -mode=go
+	GOOS=js GOARCH=wasm go build -o ./build/app.wasm .
+
+.PHONY: publish
+publish:
+	wrangler publish
diff --git a/_templates/cloudflare/worker-go/README.md b/_templates/cloudflare/worker-go/README.md
new file mode 100644
index 0000000..2a03f91
--- /dev/null
+++ b/_templates/cloudflare/worker-go/README.md
@@ -0,0 +1,58 @@
+# worker-template-go
+
+- A template for starting a Cloudflare Worker project with Go.
+- This template uses [`workers`](https://github.com/syumai/workers) package to run an HTTP server.
+
+## Notice
+
+- A free plan Cloudflare Workers only accepts ~1MB sized workers.
+  - Go Wasm binaries easily exceeds this limit, so **you'll need to use a paid plan of Cloudflare Workers** (which accepts ~5MB sized workers).
+
+## Usage
+
+- `main.go` includes simple HTTP server implementation. Feel free to edit this code and implement your own HTTP server.
+
+## Requirements
+
+- Node.js
+- [wrangler](https://developers.cloudflare.com/workers/wrangler/)
+  - just run `npm install -g wrangler`
+- Go
+
+## Getting Started
+
+```
+$ wrangler generate my-app syumai/workers/_templates/cloudflare/worker-go
+$ cd my-app
+$ go mod init
+$ go mod tidy
+$ make dev # start running dev server
+$ curl http://localhost:8787/hello
+Hello!
+```
+
+- To change worker name, please edit `name` property in `wrangler.toml`.
+
+## Development
+
+### Commands
+
+```
+make dev     # run dev server
+make build   # build Go Wasm binary
+make publish # publish worker
+```
+
+### Testing dev server
+
+- Just send HTTP request using some tools like curl.
+
+```
+$ curl http://localhost:8787/hello
+Hello!
+```
+
+```
+$ curl -X POST -d "test message" http://localhost:8787/echo
+test message
+```
diff --git a/_templates/cloudflare/worker-go/main.go b/_templates/cloudflare/worker-go/main.go
new file mode 100644
index 0000000..2e2326c
--- /dev/null
+++ b/_templates/cloudflare/worker-go/main.go
@@ -0,0 +1,24 @@
+package main
+
+import (
+	"bytes"
+	"io"
+	"net/http"
+
+	"github.com/syumai/workers"
+)
+
+func main() {
+	http.HandleFunc("/hello", func(w http.ResponseWriter, req *http.Request) {
+		msg := "Hello!"
+		w.Write([]byte(msg))
+	})
+	http.HandleFunc("/echo", func(w http.ResponseWriter, req *http.Request) {
+		b, err := io.ReadAll(req.Body)
+		if err != nil {
+			panic(err)
+		}
+		io.Copy(w, bytes.NewReader(b))
+	})
+	workers.Serve(nil) // use http.DefaultServeMux
+}
diff --git a/_templates/cloudflare/worker-go/wrangler.toml b/_templates/cloudflare/worker-go/wrangler.toml
new file mode 100644
index 0000000..7e68af0
--- /dev/null
+++ b/_templates/cloudflare/worker-go/wrangler.toml
@@ -0,0 +1,9 @@
+name = "go-worker"
+main = "./build/worker.mjs"
+compatibility_date = "2022-11-19"
+compatibility_flags = [
+    "streams_enable_constructors"
+]
+
+[build]
+command = "make build"