Deploy your app or API on Deta Micros

A Deta Micro is a micro server where you can deploy your Python or Node web app without worrying about ops.

Python#

Most Python micro frameworks are supported, like FastAPI and Flask. Deta should run both pure WSGI & ASGI apps without any issue. Full frameworks like Django are not fully supported yet, as they require various other commands.

For Deta to be able to run your code, you need to call your app instance app and it has to be in a file called main.py, which is the only required file for a Python Micro. Of course you could add more files and folders.

No need to use a server like uvicorn, Deta has its own global server. Make sure you have the framework in your requirements.txt.

Example code#

FastAPI#

from fastapi import FastAPI

app = FastAPI()  # notice that the app instance is called `app`, this is very important.

@app.get("/")
async def read_root():
    return {"Hello": "World"}

Bottlepy#

from bottle import Bottle

app = Bottle()  # notice that the app instance is called `app`, this is very important.

@app.route('/')
def home():
    return 'Hello, World!'

Flask#

from flask import Flask

app = Flask(__name__)  # notice that the app instance is called `app`, this is very important.

@app.route("/")
def hello_world():
    return "<p>Hello, World!</p>"

Starlette#

from starlette.applications import Starlette
from starlette.responses import JSONResponse
from starlette.routing import Route


async def homepage(request):
    return JSONResponse({'hello': 'world'})


# notice that the app instance is called `app`, this is very important.
app = Starlette(debug=True, routes=[
    Route('/', homepage),
])

Node.js#

Most Node.js micro frameworks are supported, like Express, Koa, etc.

For Deta to be able to run your code, you need to call your app instance app and it has to be in a file called index.js, which is the only required file for a Node Micro. You also need to export app. Of course you could add more files and folders.

Make sure you have the framework in your package.json.

Example code#

Express.js#

const express = require('express');
const app = express(); // notice that the app instance is called `app`, this is very important.

app.get('/', (req, res) => {
  res.send('Hello World!');
});

// no need for `app.listen()` on Deta, we run the app automatically.
module.exports = app; // make sure to export your `app` instance.

Koa.js#

const Koa = require('koa');
const app = new Koa();

app.use(async ctx => {
  ctx.body = 'Hello World';
});

// no need for `app.listen()` on Deta, we run the app automatically.
module.exports = app; // make sure to export your `app` instance.

Fastify.js#

const app = require('fastify')();

// Declare a route
app.get('/', async (request, reply) => {
  return { hello: 'world' };
});

// no need for `app.listen()` on Deta, we run the app automatically.
module.exports = app; // make sure to export your `app` instance.

Issues#

If you run into any issues, consider reporting them in our Github Discussions.