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77 lines
3.1 KiB
Markdown
77 lines
3.1 KiB
Markdown
---
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title: Koa
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description: Setting up Apollo Server with Koa
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---
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[](https://badge.fury.io/js/apollo-server-core) [](https://travis-ci.org/apollographql/apollo-server) [](https://coveralls.io/github/apollographql/apollo-server?branch=master) [](https://www.apollographql.com/#slack)
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This is the Koa integration of Apollo Server. Apollo Server is a community-maintained open-source Apollo Server that works with all Node.js HTTP server frameworks: Express, Connect, Hapi, Koa and Restify. [Read the docs](https://www.apollographql.com/docs/apollo-server/).
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```sh
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npm install apollo-server-koa
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```
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## Usage
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```js
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import koa from 'koa'; // koa@2
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import koaRouter from 'koa-router';
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import koaBody from 'koa-bodyparser';
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import { graphqlKoa } from 'apollo-server-koa';
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const app = new koa();
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const router = new koaRouter();
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const PORT = 3000;
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// koaBody is needed just for POST.
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app.use(koaBody());
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router.post('/graphql', graphqlKoa({ schema: myGraphQLSchema }));
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router.get('/graphql', graphqlKoa({ schema: myGraphQLSchema }));
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app.use(router.routes());
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app.use(router.allowedMethods());
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app.listen(PORT);
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```
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### GraphiQL
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You can also use `apollo-server-koa` for hosting the [GraphiQL](https://github.com/graphql/graphiql) in-browser IDE. Note the difference between `graphqlKoa` and `graphiqlKoa`.
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```js
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import { graphiqlKoa } from 'apollo-server-koa';
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// Setup the /graphiql route to show the GraphiQL UI
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router.get(
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'/graphiql',
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graphiqlKoa({
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endpointURL: '/graphql', // a POST endpoint that GraphiQL will make the actual requests to
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}),
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);
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```
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In case your GraphQL endpoint is protected via authentication, or if you need to pass other custom headers in the request that GraphiQL makes, you can use the [`passHeader`](https://github.com/apollographql/apollo-server/blob/v1.0.2/packages/apollo-server-module-graphiql/src/renderGraphiQL.ts#L17) option – a string that will be added to the request header object.
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For example:
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```js
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import { graphiqlKoa } from 'apollo-server-koa';
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router.get(
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'/graphiql',
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graphiqlKoa({
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endpointURL: '/graphql',
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passHeader: `'Authorization': 'Bearer lorem ipsum'`,
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}),
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);
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```
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## Principles
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Apollo Server is built with the following principles in mind:
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* **By the community, for the community**: Apollo Server's development is driven by the needs of developers
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* **Simplicity**: by keeping things simple, Apollo Server is easier to use, easier to contribute to, and more secure
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* **Performance**: Apollo Server is well-tested and production-ready - no modifications needed
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Anyone is welcome to contribute to Apollo Server, just read [CONTRIBUTING.md](https://github.com/apollographql/apollo-server/blob/master/CONTRIBUTING.md), take a look at the [roadmap](https://github.com/apollographql/apollo-server/blob/master/ROADMAP.md) and make your first PR!
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