rembAWS Lambda adapter
The AWS Lambda adapter is supported for API Gateway Rest API(v1) and HTTP API(v2) use cases.
Example app
Description
Links
API Gateway with NodeJS client.
How to add tRPC
1. Install deps
bash
yarn add @trpc/server
2. Create a tRPC router
Implement your tRPC router. A sample router is given below:
server.ts
ts
import { initTRPC } from '@trpc/server';
import { z } from 'zod';
export const t = initTRPC.create();
const appRouter = t.router({
getUser: t.procedure.input(z.string()).query((opts) => {
`opts.input; // string`
`return { id: opts.input, name: 'Bilbo' };`
}),
});
// export type definition of API
export type AppRouter = typeof appRouter;
3. Use the Amazon API Gateway adapter
tRPC includes an adapter for API Gateway out of the box. This adapter lets you run your routes through the API Gateway handler.
server.ts
ts
import { CreateAWSLambdaContextOptions, awsLambdaRequestHandler } from '@trpc/server/adapters/aws-lambda';
const appRouter = /* ... */;
// created for each request
const createContext = ({
event,
context,
}: CreateAWSLambdaContextOptions<APIGatewayProxyEventV2>) => ({}) // no context
type Context = Awaited<ReturnType<typeof createContext>>;
export const handler = awsLambdaRequestHandler({
router: appRouter,
createContext,
})
Build & deploy your code, now use your API Gateway URL to call your function.
Endpoint
HTTP URI
getUser
GET https://<execution-api-link>/getUser?input=INPUT
where INPUT is a URI-encoded JSON string.
A word about payload format version
API Gateway has two different event data formats when it invokes a Lambda. For REST APIs they should be version "1.0"(APIGatewayProxyEvent), but you can choose which for HTTP APIs by stating either version "1.0" or "2.0".
- Version 1.0:
APIGatewayProxyEvent - Version 2.0:
APIGatewayProxyEventV2
To infer what version you might have, supply the context as following:
ts
function createContext({
event,
context,
}: CreateAWSLambdaContextOptions<APIGatewayProxyEvent>) {
...
}
// CreateAWSLambdaContextOptions<APIGatewayProxyEvent> or CreateAWSLambdaContextOptions<APIGatewayProxyEventV2>