# @fastify/swagger-ui [![NPM version](https://img.shields.io/npm/v/@fastify/swagger-ui.svg?style=flat)](https://www.npmjs.com/package/@fastify/swagger-ui) [![CI](https://github.com/fastify/fastify-swagger-ui/actions/workflows/ci.yml/badge.svg?branch=main)](https://github.com/fastify/fastify-swagger-ui/actions/workflows/ci.yml) [![neostandard javascript style](https://img.shields.io/badge/code_style-neostandard-brightgreen?style=flat)](https://github.com/neostandard/neostandard) A Fastify plugin for serving [Swagger UI](https://swagger.io/tools/swagger-ui/). ![Demo](https://user-images.githubusercontent.com/52195/228162405-c85ad0d1-900d-442a-b712-7108d98d621f.png) ## Install ``` npm i @fastify/swagger-ui ``` ### Compatibility | Plugin version | Fastify version | Swagger Plugin Version | | -------------- | --------------- | ---------------------- | | `^5.x` | `^5.x` | `^9.x` | | `^2.x` | `^4.x` | `^8.x` | | `^1.x` | `^4.x` | `^8.x` | Please note that if a Fastify version is out of support, then so are the corresponding versions of this plugin in the table above. See [Fastify's LTS policy](https://github.com/fastify/fastify/blob/main/docs/Reference/LTS.md) for more details. ## Usage Add it with `@fastify/swagger` to your project with `register`, pass it some options, call the `swagger` API, and you are done! ```js import fastify from 'fastify' const app = fastify() await app.register(import('@fastify/swagger')) await app.register(import('@fastify/swagger-ui'), { routePrefix: '/documentation', uiConfig: { docExpansion: 'full', deepLinking: false }, uiHooks: { onRequest: function (request, reply, next) { next() }, preHandler: function (request, reply, next) { next() } }, staticCSP: true, transformStaticCSP: (header) => header, transformSpecification: (swaggerObject, request, reply) => { return swaggerObject }, transformSpecificationClone: true }) app.put('/some-route/:id', { schema: { description: 'post some data', tags: ['user', 'code'], summary: 'qwerty', params: { type: 'object', properties: { id: { type: 'string', description: 'user id' } } }, body: { type: 'object', properties: { hello: { type: 'string' }, obj: { type: 'object', properties: { some: { type: 'string' } } } } }, response: { 201: { description: 'Successful response', type: 'object', properties: { hello: { type: 'string' } } }, default: { description: 'Default response', type: 'object', properties: { foo: { type: 'string' } } } }, security: [ { "apiKey": [] } ] } }, (req, reply) => {}) await app.ready() ``` ## API ### Register options #### Options | Option | Default | Description | | ------------------ | --------------- |---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | baseDir | undefined | Specify the directory where all spec files that are included in the main one using $ref will be located. By default, this is the directory where the main spec file is located. Provided value should be an absolute path without trailing slash. | | initOAuth | {} | Configuration options for [Swagger UI initOAuth](https://swagger.io/docs/open-source-tools/swagger-ui/usage/oauth2/). | | routePrefix | '/documentation' | Overwrite the default Swagger UI route prefix. | | indexPrefix | '' | Add an additional prefix. This is for when the Fastify server is behind path based routing. ex. NGINX | | staticCSP | false | Enable CSP header for static resources. | | transformStaticCSP | undefined | Synchronous function to transform CSP header for static resources if the header has been previously set. | | transformSpecification | undefined | Synchronous function to transform the swagger document. | | transformSpecificationClone| true | Provide a deepcloned swaggerObject to transformSpecification | | uiConfig | {} | Configuration options for [Swagger UI](https://github.com/swagger-api/swagger-ui/blob/master/docs/usage/configuration.md). | | uiHooks | {} | Additional hooks for the documentation's routes. You can provide the `onRequest` and `preHandler` hooks with the same [route's options](https://fastify.dev/docs/latest/Reference/Routes/#routes-options) interface. | | theme | {} | Add custom JavaScript and CSS to the Swagger UI web page | | logLevel | info | Allow to define route log level. | The plugin will expose the documentation with the following APIs: | URL | Description | | ----------------------- | ------------------------------------------ | | `'/documentation/json'` | The JSON object representing the API | | `'/documentation/yaml'` | The YAML object representing the API | | `'/documentation/'` | The swagger UI | | `'/documentation/*'` | External files that you may use in `$ref` | #### uiConfig To configure Swagger UI, you need to modify the `uiConfig` option. It's important to ensure that functions are self-contained. Keep in mind that you cannot modify the backend code within the `uiConfig` functions, as these functions are processed only by the browser. You can reference the Swagger UI element using `ui`, which is assigned to `window.ui`. ##### Example ```js const fastify = require('fastify')() await fastify.register(require('@fastify/swagger')) await fastify.register(require('@fastify/swagger-ui'), { uiConfig: { onComplete: function () { alert('ui has type of ' + typeof ui) // 'ui has type of object' alert('fastify has type of ' + typeof fastify) // 'fastify has type of undefined' alert('window has type of ' + typeof window) // 'window has type of object' alert('global has type of ' + typeof global) // 'global has type of undefined' } } }) ``` #### transformSpecification There can be use cases, where you want to modify the swagger definition on request. E.g. you want to modify the server definition based on the hostname of the request object. In such a case you can utilize the transformSpecification-option. ##### Example ```js const fastify = require('fastify')() await fastify.register(require('@fastify/swagger')) await fastify.register(require('@fastify/swagger-ui'), { transformSpecification: (swaggerObject, req, reply) => { swaggerObject.host = req.hostname return swaggerObject } }) ``` By default fastify.swagger() will be deepcloned and passed to the transformSpecification-function, as fastify.swagger() returns a mutatable Object. You can disable the deepcloning by setting transformSpecificationClone to false. This is useful, if you want to handle the deepcloning in the transformSpecification function. ##### Example with caching ```js const fastify = require('fastify')() const LRU = require('tiny-lru').lru const rfdc = require('rfdc')() await fastify.register(require('@fastify/swagger')) const swaggerLru = new LRU(1000) await fastify.register(require('@fastify/swagger-ui'), { transformSpecificationClone: false, transformSpecification: (swaggerObject, req, reply) => { if (swaggerLru.has(req.hostname)) { return swaggerLru.get(req.hostname) } const clonedSwaggerObject = rfdc(swaggerObject) clonedSwaggerObject.host = req.hostname swaggerLru.set(req.hostname, clonedSwaggerObject) return clonedSwaggerObject } }) ``` #### theme You can add custom JavaScript and CSS to the Swagger UI web page by using the theme option. ##### Example ```js const fastify = require('fastify')() await fastify.register(require('@fastify/swagger')) await fastify.register(require('@fastify/swagger-ui'), { theme: { title: 'My custom title', js: [ { filename: 'special.js', content: 'alert("client javascript")' } ], css: [ { filename: 'theme.css', content: '* { border: 1px red solid; }' } ], favicon: [ { filename: 'favicon.png', rel: 'icon', sizes: '16x16', type: 'image/png', content: Buffer.from('iVBOR...', 'base64') } ] } }) ``` You can add custom JavaScript and CSS to the Swagger UI web page by using the theme option. #### logo It's possible to override the logo displayed in the top bar by specifying: ```js await fastify.register(require('@fastify/swagger-ui'), { logo: { type: 'image/png', content: Buffer.from('iVBOR...', 'base64'), href: '/documentation', target: '_blank' }, theme: { favicon: [ { filename: 'favicon.png', rel: 'icon', sizes: '16x16', type: 'image/png', content: Buffer.from('iVBOR...', 'base64') } ] } }) ``` #### Protect your documentation routes You can protect your documentation by configuring an authentication hook. Here is an example using the [`@fastify/basic-auth`](https://github.com/fastify/fastify-basic-auth) plugin: ##### Example ```js const fastify = require('fastify')() const crypto = require('node:crypto') await fastify.register(require('@fastify/swagger')) // perform constant-time comparison to prevent timing attacks function compare (a, b) { a = Buffer.from(a) b = Buffer.from(b) if (a.length !== b.length) { // Delay return with cryptographically secure timing check. crypto.timingSafeEqual(a, a) return false } return crypto.timingSafeEqual(a, b) } await fastify.register(require('@fastify/basic-auth'), { validate (username, password, req, reply, done) { let result = true result = compare(username, validUsername) && result result = compare(password, validPassword) && result if (result) { done() } else { done(new Error('Access denied')) } }, authenticate: true }) await fastify.register(require('@fastify/swagger-ui', { uiHooks: { onRequest: fastify.basicAuth } }) ``` #### Rendering models at the bottom of the page To ensure that models are correctly rendered at the bottom of the Swagger UI page, it's important to define your schemas using $refs through [fastify.addSchema](https://fastify.dev/docs/latest/Reference/Validation-and-Serialization/#adding-a-shared-schema). Directly embedding JSON schemas within the schema property of your route definitions in Fastify may lead to them not being displayed in Swagger UI. #### validatorUrl [SwaggerUI](https://github.com/swagger-api/swagger-ui/) can automatically validate the given specification using an online validator. To enable this behavior you can pass the [`validatorUrl`](https://github.com/swagger-api/swagger-ui/blob/master/docs/usage/configuration.md) option to this plugin which will be forwarded to SwaggerUI. ```js await fastify.register('@fastify/swagger-ui', { validatorUrl: 'https://validator.swagger.io/validator' }) ``` Note that this behavior is disabled by default in `@fastify/swagger-ui`. ### Bundling To bundle Swagger UI with your application, the swagger-ui static files need to be copied to the server and the `baseDir` option set to point to the file directory.

Copy files with esbuild

```js import { build } from 'esbuild' import { copy } from 'esbuild-plugin-copy' await build({ // ... plugins: [ copy({ resolveFrom: 'cwd', assets: { from: ['node_modules/@fastify/swagger-ui/static/*'], to: ['dist/static'], }, }), ], }) ```

Copy files with docker

```Dockerfile COPY ./node_modules/@fastify/swagger-ui/static /app/static ```

#### Configure Swagger UI to use a custom baseDir Set the `baseDir` option to point to your folder. ```js await fastify.register(require('@fastify/swagger-ui'), { baseDir: isDev ? undefined : path.resolve('static'), }) ``` ## License Licensed under [MIT](./LICENSE).

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@fastify/swagger-ui	295,766	163	2.38 MB	7	5日前	MIT