在我的 apolly-server-lambda 应用程序中启动 Playground 时出现此错误:
Playground.tsx:289 SyntaxError: Unexpected end of JSON input
at JSON.parse (<anonymous>)
at index.js:40
该应用程序只有一个测试解析器。我使用 type-graphql 来定义架构:
@Resolver()
export class InviteResolver {
@Query(() => String)
hello() {
return 'test';
}
}
然后我用生成的模式配置了 apollo 服务器:
async function createHandler() {
const schema = await buildSchema({
resolvers: [InviteResolver]
});
const server = new ApolloServer({
schema,
playground: {
endpoint: "/dev/graphql"
}
})
return server.createHandler({
cors: {
origin: '*',
methods: '*',
allowedHeaders: '*',
credentials: true,
},
});
}
export const handler = async function(event: APIGatewayProxyEvent, context: LambdaContext, callback: APIGatewayProxyCallback) {
context.callbackWaitsForEmptyEventLoop = false;
return await createHandler()
.then(handler => handler(event, context, callback));
};
最后,我用无服务器设置了这一切:
service: app
provider:
name: aws
runtime: nodejs12.x
region: us-east-1
apiGateway:
shouldStartNameWithService: true
functions:
graphql:
handler: src/app.handler
events:
- http:
path: /graphql
method: post
cors: true
- http:
path: /graphql
method: get
cors: true
plugins:
- serverless-dotenv-plugin
- serverless-plugin-typescript
- serverless-offline
正如您在配置中看到的那样,我使用 serverless-offline 进行开发,我从以下内容开始:
serverless offline start
它似乎成功启动:
┌───────────────────────────────────────────────────────────────────────────┐
│ │
│ POST | http://localhost:3000/dev/graphql │
│ POST | http://localhost:3000/2015-03-31/functions/graphql/invocations │
│ GET | http://localhost:3000/dev/graphql │
│ POST | http://localhost:3000/2015-03-31/functions/graphql/invocations │
│ │
└───────────────────────────────────────────────────────────────────────────┘
我可以在 上访问 Playground UI http://localhost:3000/dev/graphql
,但我立即开始在控制台中一遍又一遍地看到上面的错误。我看不到架构或文档选项卡(基本上所有轮询都失败了),并且没有查询到达该解析器。
你们看到我的接线方式有什么问题吗?