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47 lines
1.5 KiB
Markdown
47 lines
1.5 KiB
Markdown
[](https://deploy.now.sh/?repo=https://github.com/zeit/next.js/tree/master/examples/with-strict-csp)
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# Strict CSP example
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## How to use
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### Using `create-next-app`
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Execute [`create-next-app`](https://github.com/segmentio/create-next-app) with [Yarn](https://yarnpkg.com/lang/en/docs/cli/create/) or [npx](https://github.com/zkat/npx#readme) to bootstrap the example:
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```bash
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npx create-next-app --example with-strict-csp with-strict-csp-app
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# or
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yarn create next-app --example with-strict-csp with-strict-csp-app
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```
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### Download manually
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Download the example:
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```bash
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curl https://codeload.github.com/zeit/next.js/tar.gz/canary | tar -xz --strip=2 next.js-canary/examples/with-strict-csp
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cd with-strict-csp
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```
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Install it and run:
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```bash
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npm install
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npm run dev
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# or
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yarn
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yarn dev
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```
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Deploy it to the cloud with [now](https://zeit.co/now) ([download](https://zeit.co/download))
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```bash
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now
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```
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## The idea behind the example
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If you want to implement a CSP, the most effective way is to follow the [strict CSP](https://csp.withgoogle.com/docs/strict-csp.html) approach. For it to work, we need to generate a nonce on every request.
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This example uses [Helmet](https://github.com/helmetjs/helmet) to configure the CSP and add the appropriate headers to all server responses. The nonce is generated with [uuid](https://github.com/kelektiv/node-uuid). Then we can pass the nonce to `<Head>` and `<NextScript>` in the custom `<Document>`.
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