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feat(extension/transport-memory): config ctx (#1312)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,33 +1,138 @@ | ||
| /** | ||
| * This example shows how you can send requests against an in-memory GraphQL schema instead of one hosted over HTTP. | ||
| * | ||
| * Imagine this example as server code that receives HTTP requests and internally fulfills them with requests to a GraphQL schema. | ||
| * | ||
| * Included here is how to work with Graffle's lightweight client-forking model to create a request-scoped Graffle client. | ||
| * By having a Graffle instance per request, the context value that the GraphQL resolvers get during execution can reflect | ||
| * the user making the request. | ||
| */ | ||
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| import { Graffle } from 'graffle' | ||
| import { TransportMemory } from 'graffle/extensions/transport-memory' | ||
| import { GraphQLObjectType, GraphQLSchema, GraphQLString } from 'graphql' | ||
| import { showJson } from '../$/helpers.js' | ||
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| interface Context { | ||
| database: DatabaseClient | ||
| user: RequestingUser | ||
| } | ||
|
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| interface RequestingUser { | ||
| id: string | ||
| } | ||
|
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| interface DatabaseClient { | ||
| account: { | ||
| findUnique: (parameters: { where: { ownerId: string } }) => DatabaseModelAccount | undefined | ||
| } | ||
| user: { | ||
| findUnique: (parameters: { where: { id: string } }) => DatabaseModelUser | undefined | ||
| } | ||
| } | ||
|
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| interface DatabaseModelUser { | ||
| id: string | ||
| name: string | ||
| } | ||
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| interface DatabaseModelAccount { | ||
| id: string | ||
| ownerId: string | ||
| } | ||
|
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| const databaseData = { | ||
| accounts: [{ | ||
| id: `account_abc123`, | ||
| ownerId: `user_abc123`, | ||
| }], | ||
| users: [{ | ||
| id: `user_abc123`, | ||
| name: `Kenya Hara`, | ||
| }], | ||
| } | ||
|
|
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| const DatabaseClient = { | ||
| create: (): DatabaseClient => { | ||
| return { | ||
| account: { | ||
| findUnique: (parameters: { where: { ownerId: string } }) => | ||
| databaseData.accounts.find((account) => account.ownerId === parameters.where.ownerId), | ||
| }, | ||
| user: { | ||
| findUnique: (parameters: { where: { id: string } }) => | ||
| databaseData.users.find((user) => user.id === parameters.where.id), | ||
| }, | ||
| } | ||
| }, | ||
| } | ||
|
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| const schema = new GraphQLSchema({ | ||
| query: new GraphQLObjectType({ | ||
| name: `Query`, | ||
| fields: { | ||
| foo: { | ||
| account: { | ||
| type: GraphQLString, | ||
| resolve: () => `bar`, | ||
| resolve: (_, __, context: Context) => { | ||
| const account = context.database.account.findUnique({ where: { ownerId: context.user.id } }) | ||
| if (!account) throw new Error(`Account not found.`) | ||
| return account.id | ||
| }, | ||
| }, | ||
| }, | ||
| }), | ||
| }) | ||
|
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| const graffle = Graffle | ||
| interface Token { | ||
| userId: string | ||
| } | ||
|
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| const getAndValidateToken = (request: Request): Token => { | ||
| const tokenEncoded = request.headers.get(`authorization`)?.match(/^Bearer\s+(.+)$/)?.[1] | ||
| if (!tokenEncoded) throw new Error(`No token provided.`) | ||
| // ... decode token securely ... | ||
| return { | ||
| userId: tokenEncoded, | ||
| } | ||
| } | ||
|
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| const database = DatabaseClient.create() | ||
|
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| const baseGraffle = Graffle | ||
| .create() | ||
| .use(TransportMemory({ schema })) | ||
| .transport(`memory`) | ||
|
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| const data = await graffle.gql` | ||
| { | ||
| foo | ||
| const handleRequest = async (request: Request) => { | ||
| const user = { | ||
| id: getAndValidateToken(request).userId, | ||
| } | ||
|
|
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| const resolverContextValue = { | ||
| database, | ||
| user, | ||
| } | ||
| `.send() | ||
|
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| showJson(data) | ||
| // Create a copy of Graffle with transport configured | ||
| // with context data particular to this request. | ||
| const requestScopedGraffle = baseGraffle.transport({ | ||
| resolverValues: { | ||
| context: resolverContextValue, | ||
| }, | ||
| }) | ||
|
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| const data = await requestScopedGraffle.gql` | ||
| { | ||
| account | ||
| } | ||
| `.send() | ||
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| showJson(data) | ||
| } | ||
|
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| // Server receives a request... | ||
| await handleRequest( | ||
| new Request(`https://foo.com`, { | ||
| headers: new Headers({ authorization: `Bearer user_abc123` }), | ||
| }), | ||
| ) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,4 +1,4 @@ | ||
| ---------------------------------------- SHOW ---------------------------------------- | ||
| { | ||
| "foo": "bar" | ||
| "account": "account_abc123" | ||
| } |
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