Wrangler Has a Free API That Most Developers Dont Know About

#cloudflare #serverless #devtools #webdev

Wrangler is the CLI for Cloudflare Workers. Deploy serverless functions, manage KV storage, R2 buckets, D1 databases, and more from the command line.

Quick Start

npm create cloudflare@latest my-worker
cd my-worker
npx wrangler dev  # Local development
npx wrangler deploy  # Deploy to edge

Worker Code

// src/index.ts
export default {
  async fetch(request: Request, env: Env): Promise<Response> {
    const url = new URL(request.url);

    if (url.pathname === "/api/kv") {
      const value = await env.MY_KV.get("key");
      return Response.json({ value });
    }

    if (url.pathname === "/api/d1") {
      const { results } = await env.DB.prepare("SELECT * FROM users LIMIT 10").all();
      return Response.json(results);
    }

    return new Response("Hello from the edge!");
  }
};

CLI Commands

# KV Storage
wrangler kv namespace create MY_KV
wrangler kv key put --binding MY_KV "key" "value"
wrangler kv key get --binding MY_KV "key"

# D1 Database
wrangler d1 create my-db
wrangler d1 execute my-db --command "CREATE TABLE users (id INTEGER PRIMARY KEY, name TEXT)"

# R2 Storage
wrangler r2 bucket create my-bucket
wrangler r2 object put my-bucket/file.txt --file ./local-file.txt

# Secrets
wrangler secret put API_KEY