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https://github.com/apollographql/apollo-link-rest
Use existing REST endpoints with GraphQL
https://github.com/apollographql/apollo-link-rest
Last synced: 3 months ago
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Use existing REST endpoints with GraphQL
- Host: GitHub
- URL: https://github.com/apollographql/apollo-link-rest
- Owner: apollographql
- License: mit
- Created: 2017-11-27T15:26:14.000Z (about 7 years ago)
- Default Branch: master
- Last Pushed: 2024-10-15T12:29:59.000Z (3 months ago)
- Last Synced: 2024-10-17T15:21:22.659Z (3 months ago)
- Language: TypeScript
- Size: 653 KB
- Stars: 790
- Watchers: 47
- Forks: 122
- Open Issues: 48
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- Contributing: CONTRIBUTING.md
- License: LICENSE
Awesome Lists containing this project
- awesome - apollo-link-rest - Use existing REST endpoints with GraphQL (TypeScript)
- awesome-list - apollo-link-rest
README
---
title: REST Link
---
## ⚠️ This library is under active development ⚠️
> The [Apollo Link Rest](https://github.com/apollographql/apollo-link-rest) library is maintained by Apollo community members and not an Apollo GraphQL maintained library. For information on progress check out [the issues](https://github.com/apollographql/apollo-link-rest/issues) or [the design](./designs/initial.md). We would love your help with writing docs, testing, anything! We would love for you, yes you, to be a part of the Apollo community!
## Purpose
An Apollo Link to easily try out GraphQL without a full server. It can be used to prototype, with third-party services that don't have a GraphQL endpoint or in a transition from REST to GraphQL.
## Installation
```bash
npm install apollo-link-rest @apollo/client graphql qs --save
or
yarn add apollo-link-rest @apollo/client graphql qs
```
`@apollo/client`, `graphql`, and `qs` are peer dependencies needed by `apollo-link-rest`.
## Usage
### Basics
```js
import { RestLink } from "apollo-link-rest";
// Other necessary imports...
// Create a RestLink for the REST API
// If you are using multiple link types, restLink should go before httpLink,
// as httpLink will swallow any calls that should be routed through rest!
const restLink = new RestLink({
uri: 'https://swapi.co/api/',
});
// Configure the ApolloClient with the default cache and RestLink
const client = new ApolloClient({
link: restLink,
cache: new InMemoryCache(),
});
// A simple query to retrieve data about the first person
const query = gql`
query luke {
person @rest(type: "Person", path: "people/1/") {
name
}
}
`;
// Invoke the query and log the person's name
client.query({ query }).then(response => {
console.log(response.data.person.name);
});
```
[](https://codesandbox.io/s/github/apollographql/apollo-link-rest/tree/master/examples/simple)
### Apollo Client & React Apollo
For an example of using REST Link with Apollo Client and React Apollo view this CodeSandbox:
[](https://codesandbox.io/s/github/apollographql/apollo-link-rest/tree/master/examples/advanced)
### TypeScript
For an example of using REST Link with Apollo Client, React Apollo and TypeScript view this CodeSandbox:
[](https://codesandbox.io/s/github/apollographql/apollo-link-rest/tree/master/examples/typescript)
## Options
REST Link takes an object with some options on it to customize the behavior of the link. The options you can pass are outlined below:
- `uri`: the URI key is a string endpoint (optional when `endpoints` provides a default)
- `endpoints`: root endpoint (uri) to apply paths to or a map of endpoints
- `customFetch`: a custom `fetch` to handle REST calls
- `headers`: an object representing values to be sent as headers on the request
- `credentials`: a string representing the credentials policy you want for the fetch call
- `fieldNameNormalizer`: function that takes the response field name and converts it into a GraphQL compliant name
## Context
REST Link uses the `headers` field on the context to allow passing headers to the HTTP request. It also supports the `credentials` field for defining credentials policy.
- `headers`: an object representing values to be sent as headers on the request
- `credentials`: a string representing the credentials policy you want for the fetch call
## Documentation
For a complete `apollo-link-rest` reference visit the documentation website at: https://www.apollographql.com/docs/link/links/rest.html
## Contributing
This project uses TypeScript to bring static types to JavaScript and uses Jest for testing. To get started, clone the repo and run the following commands:
```bash
npm install # or `yarn`
npm test # or `yarn test` to run tests
npm test -- --watch # run tests in watch mode
npm run check-types # or `yarn check-types` to check TypeScript types
```
To run the library locally in another project, you can do the following:
```bash
npm link
# in the project you want to run this in
npm link apollo-link-rest
```
## Related Libraries
- [JSON API Link](https://github.com/Rsullivan00/apollo-link-json-api/) provides
tooling for using GraphQL with JSON API compliant APIs.
- [apollo-type-patcher](https://github.com/mpgon/apollo-type-patcher) declarative type definitions for your REST API with zero dependencies.