Workers で Turso データベースに接続してクエリする

# On macOS or Linux with Homebrew
brew install chiselstrike/tap/turso

# Manual scripted installation
curl -sSfL <https://get.tur.so/install.sh> | bash

turso --version

# This should output your current Turso CLI version (your installed version may be higher):
turso version v0.51.0

turso auth login

Waiting for authentication...
✔  Success! Logged in as <your GitHub username>

turso db create my-db

# Example:
[===>                ]
Creating database my-db in Los Angeles, California (US) (lax)
# Once succeeded:
Created database my-db in Los Angeles, California (US) (lax) in 34 seconds.

turso db shell my-db

create table example_users (email text);
insert into example_users values ('[email protected]');

cd worker-turso-ts

turso db show my-db --url

libsql://my-db-<your-github-username>.turso.io

turso db tokens create my-db -e none
# Will output a long text string (an encoded JSON Web Token)

LIBSQL_DB_AUTH_TOKEN="<YOUR_AUTH_TOKEN>"

# Ensure you specify the secret name exactly: your Worker will need to reference it later.
npx wrangler secret put LIBSQL_DB_AUTH_TOKEN

? Enter a secret value: › <paste your token here>

import { Client as LibsqlClient, createClient } from "@libsql/client/web";
import { Router, RouterType } from "itty-router";

export interface Env {
	// The environment variable containing your the URL for your Turso database.
	LIBSQL_DB_URL?: string;
	// The Secret that contains the authentication token for your Turso database.
	LIBSQL_DB_AUTH_TOKEN?: string;

	// These objects are created before first use, then stashed here
	// for future use
	router?: RouterType;
}

export default {
	async fetch(request, env): Promise<Response> {
		if (env.router === undefined) {
			env.router = buildRouter(env);
		}

		return env.router.fetch(request);
	},
} satisfies ExportedHandler<Env>;

function buildLibsqlClient(env: Env): LibsqlClient {
	const url = env.LIBSQL_DB_URL?.trim();
	if (url === undefined) {
		throw new Error("LIBSQL_DB_URL env var is not defined");
	}

	const authToken = env.LIBSQL_DB_AUTH_TOKEN?.trim();
	if (authToken === undefined) {
		throw new Error("LIBSQL_DB_AUTH_TOKEN env var is not defined");
	}

	return createClient({ url, authToken });
}

function buildRouter(env: Env): RouterType {
	const router = Router();

	router.get("/users", async () => {
		const client = buildLibsqlClient(env);
		const rs = await client.execute("select * from example_users");
		return Response.json(rs);
	});

	router.get("/add-user", async (request) => {
		const client = buildLibsqlClient(env);
		const email = request.query.email;
		if (email === undefined) {
			return new Response("Missing email", { status: 400 });
		}
		if (typeof email !== "string") {
			return new Response("email must be a single string", { status: 400 });
		}
		if (email.length === 0) {
			return new Response("email length must be > 0", { status: 400 });
		}

		try {
			await client.execute({
				sql: "insert into example_users values (?)",
				args: [email],
			});
		} catch (e) {
			console.error(e);
			return new Response("database insert failed");
		}

		return new Response("Added");
	});

	router.all("*", () => new Response("Not Found.", { status: 404 }));

	return router;
}

npx wrangler dev

Your worker has access to the following bindings:
- Vars:
  - LIBSQL_DB_URL: "your-url"
⎔ Starting a local server...
╭─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╮
│ [b] open a browser, [d] open Devtools, [l] turn off local mode, [c] clear console, [x] to exit                                                                  	│
╰─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╯
Debugger listening on ws://127.0.0.1:61918/1064babd-bc9d-4bed-b171-b35dab3b7680
For help, see: https://nodejs.org/en/docs/inspector
Debugger attached.
[mf:inf] Worker reloaded! (40.25KiB)
[mf:inf] Listening on 0.0.0.0:8787
[mf:inf] - http://127.0.0.1:8787
[mf:inf] - http://192.168.1.136:8787
[mf:inf] Updated `Request.cf` object cache!

{
	"columns": ["email"],
	"rows": [{ "email": "[email protected]" }],
	"rowsAffected": 0
}

npx wrangler deploy

Your worker has access to the following bindings:
- Vars:
  - LIBSQL_DB_URL: "your-url"
...
Published worker-turso-ts (0.19 sec)
  https://worker-turso-ts.<your-Workers-subdomain>.workers.dev
Current Deployment ID: f9e6b48f-5aac-40bd-8f44-8a40be2212ff