120 lines
4.9 KiB
Markdown
120 lines
4.9 KiB
Markdown
# @astrojs/cloudflare
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An SSR adapter for use with Cloudflare Pages Functions targets. Write your code in Astro/Javascript and deploy to Cloudflare Pages.
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## Install
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Add the Cloudflare 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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```sh
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# Using NPM
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npx astro add cloudflare
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# Using Yarn
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yarn astro add cloudflare
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# Using PNPM
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pnpm astro add cloudflare
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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. Add the Cloudflare 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/cloudflare
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```
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2. Add the following to your `astro.config.mjs` 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 cloudflare from '@astrojs/cloudflare';
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export default defineConfig({
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output: 'server',
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adapter: cloudflare()
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});
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```
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## Options
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### Mode
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`mode: "advanced" | "directory"`
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default `"advanced"`
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Cloudflare Pages has 2 different modes for deploying functions, `advanced` mode which picks up the `_worker.js` in `dist`, or a directory mode where pages will compile the worker out of a functions folder in the project root.
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For most projects the adaptor default of `advanced` will be sufficient; the `dist` folder will contain your compiled project. Switching to directory mode allows you to use [pages plugins](https://developers.cloudflare.com/pages/platform/functions/plugins/) such as [Sentry](https://developers.cloudflare.com/pages/platform/functions/plugins/sentry/) or write custom code to enable logging.
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In directory mode the adaptor will compile the client side part of you app the same way, but moves the worker script into a `functions` folder in the project root. The adaptor will only ever place a `[[path]].js` in that folder, allowing you to add additional plugins and pages middleware which can be checked into version control. Cloudflare documentation contains more information about [writing custom functions](https://developers.cloudflare.com/pages/platform/functions/).
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```ts
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// directory mode
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export default defineConfig({
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adapter: cloudflare({ mode: "directory" }),
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});
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```
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## Enabling Preview
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In order for preview to work you must install `wrangler`
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```sh
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$ pnpm install wrangler --save-dev
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```
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It's then possible to update the preview script in your `package.json` to `"preview": "wrangler pages dev ./dist"`.This will allow you run your entire application locally with [Wrangler](https://github.com/cloudflare/wrangler2), which supports secrets, environment variables, KV namespaces, Durable Objects and [all other supported Cloudflare bindings](https://developers.cloudflare.com/pages/platform/functions/#adding-bindings).
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## Access to the Cloudflare runtime
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You can access all the Cloudflare bindings and environment variables from Astro components and API routes through the adapter API.
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```js
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import { getRuntime } from "@astrojs/cloudflare/runtime";
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getRuntime(Astro.request);
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```
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Depending on your adapter mode (advanced = worker, directory = pages), the runtime object will look a little different due to differences in the Cloudflare API.
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## Streams
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Some integrations such as [React](https://github.com/withastro/astro/tree/main/packages/integrations/react) rely on web streams. Currently Cloudflare Pages Functions require enabling a flag to support Streams.
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To do this:
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- go to the Cloudflare Pages project
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- click on Settings in the top bar, then Functions in the sidebar
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- scroll down to Compatibility Flags, click Configure Production Compatibility Flags, and add `streams_enable_constructors`
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- do this for both the Production Compatibility Flags and Preview Compatibility Flags
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## Environment Variables
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As Cloudflare Pages Functions [provides environment variables per request](https://developers.cloudflare.com/pages/platform/functions/#adding-environment-variables-locally), you can only access private environment variables when a request has happened. Usually, this means moving environment variable access inside a function.
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```js
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// pages/[id].json.js
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export function get({ params }) {
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// Access environment variables per request inside a function
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const serverUrl = import.meta.env.SERVER_URL;
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const result = await fetch(serverUrl + "/user/" + params.id);
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return {
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body: await result.text(),
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};
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}
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```
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## Troubleshooting
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For help, check out the `#support` 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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[astro-integration]: https://docs.astro.build/en/guides/integrations-guide/
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