120 lines
3.9 KiB
Markdown
120 lines
3.9 KiB
Markdown
# @astrojs/node 🔲
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This adapter allows Astro to deploy your SSR site to Node targets.
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- <strong>[Why Astro Node](#why-astro-node)</strong>
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- <strong>[Installation](#installation)</strong>
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- <strong>[Usage](#usage)</strong>
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- <strong>[Configuration](#configuration)</strong>
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- <strong>[Troubleshooting](#troubleshooting)</strong>
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- <strong>[Contributing](#contributing)</strong>
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- <strong>[Changelog](#changelog)</strong>
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## Why Astro Node
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If you're using Astro as a static site builder—its behavior out of the box—you don't need an adapter.
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If you wish to [use server-side rendering (SSR)](https://docs.astro.build/en/guides/server-side-rendering/), Astro requires an adapter that matches your deployment runtime.
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[Node](https://nodejs.org/en/) is a JavaScript runtime for server-side code. Frameworks like [Express](https://expressjs.com/) are built on top of it and make it easier to write server applications in Node. This adapter provides access to Node's API and creates a script to run your Astro project that can be utilized in Node applications.
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## Installation
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Add the Node adapter to enable SSR in your Astro project with the following `astro add` command. This will install the adapter and make the appropriate changes to your `astro.config.mjs` file in one step.
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```bash
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npx astro add node
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```
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If you prefer to install the adapter manually instead, complete the following two steps:
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1. Install the Node adapter to your project’s dependencies using your preferred package manager. If you’re using npm or aren’t sure, run this in the terminal:
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```bash
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npm install @astrojs/node
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```
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1. Add two new lines to your `astro.config.mjs` project configuration file.
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```js title="astro.config.mjs" ins={2, 5-6}
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import { defineConfig } from 'astro/config';
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import node from '@astrojs/node';
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export default defineConfig({
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output: 'server',
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adapter: node(),
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});
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```
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## Usage
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After [performing a build](https://docs.astro.build/en/guides/deploy/#building-your-site-locally) there will be a `dist/server/entry.mjs` module that exposes a `handler` function. This works like a [middleware](https://expressjs.com/en/guide/using-middleware.html) function: it can handle incoming requests and respond accordingly.
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### Using a middleware framework
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You can use this `handler` with any framework that supports the Node `request` and `response` objects.
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For example, with Express:
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```js
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import express from 'express';
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import { handler as ssrHandler } from './dist/server/entry.mjs';
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const app = express();
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app.use(express.static('dist/client/'))
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app.use(ssrHandler);
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app.listen(8080);
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```
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### Using `http`
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This output script does not require you use Express and can work with even the built-in `http` and `https` node modules. The handler does follow the convention calling an error function when either
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- A route is not found for the request.
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- There was an error rendering.
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You can use these to implement your own 404 behavior like so:
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```js
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import http from 'http';
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import { handler as ssrHandler } from './dist/server/entry.mjs';
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http.createServer(function(req, res) {
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ssrHandler(req, res, err => {
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if(err) {
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res.writeHead(500);
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res.end(err.toString());
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} else {
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// Serve your static assets here maybe?
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// 404?
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res.writeHead(404);
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res.end();
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}
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});
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}).listen(8080);
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```
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## Configuration
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This adapter does not expose any configuration options.
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## Troubleshooting
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For help, check out the `#support-threads` channel on [Discord](https://astro.build/chat). Our friendly Support Squad members are here to help!
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You can also check our [Astro Integration Documentation][astro-integration] for more on integrations.
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## Contributing
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This package is maintained by Astro's Core team. You're welcome to submit an issue or PR!
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## Changelog
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See [CHANGELOG.md](CHANGELOG.md) for a history of changes to this integration.
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[astro-integration]: https://docs.astro.build/en/guides/integrations-guide/
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