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@connectrpc/connect-node

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@connectrpc/connect-node

Connect is a family of libraries for building and consuming APIs on different languages and platforms, and [@connectrpc/connect](https://www.npmjs.com/package/@connectrpc/connect) brings type-safe APIs with Protobuf to TypeScript.

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@connectrpc/connect-node

Connect is a family of libraries for building and consuming APIs on different languages and platforms, and @connectrpc/connect brings type-safe APIs with Protobuf to TypeScript.

@connectrpc/connect-node provides the following adapters for Node.js:

createConnectTransport()

Lets your clients running on Node.js talk to a server with the Connect protocol:

import { createClient } from "@connectrpc/connect";
+ import { createConnectTransport } from "@connectrpc/connect-node";
import { ElizaService } from "./gen/eliza_connect.js";

+ // A transport for clients using the Connect protocol with Node.js `http` module
+ const transport = createConnectTransport({
+   baseUrl: "https://demo.connectrpc.com",
+   httpVersion: "1.1"
+ });

const client = createClient(ElizaService, transport);
const { sentence } = await client.say({ sentence: "I feel happy." });
console.log(sentence) // you said: I feel happy.

createGrpcTransport()

Lets your clients running on Node.js talk to a server with the gRPC protocol:

import { createClient } from "@connectrpc/connect";
+ import { createGrpcTransport } from "@connectrpc/connect-node";
import { ElizaService } from "./gen/eliza_connect.js";

+ // A transport for clients using the gRPC protocol with Node.js `http2` module
+ const transport = createGrpcTransport({
+   baseUrl: "https://demo.connectrpc.com",
+   httpVersion: "2"
+ });

const client = createClient(ElizaService, transport);
const { sentence } = await client.say({ sentence: "I feel happy." });
console.log(sentence) // you said: I feel happy.

createGrpcWebTransport()

Lets your clients running on Node.js talk to a server with the gRPC-web protocol:

import { createClient } from "@connectrpc/connect";
+ import { createGrpcWebTransport } from "@connectrpc/connect-node";
import { ElizaService } from "./gen/eliza_connect.js";

+ // A transport for clients using the Connect protocol with Node.js `http` module
+ const transport = createGrpcWebTransport({
+   baseUrl: "https://demo.connectrpc.com",
+   httpVersion: "1.1"
+ });

const client = createClient(ElizaService, transport);
const { sentence } = await client.say({ sentence: "I feel happy." });
console.log(sentence) // you said: I feel happy.

connectNodeAdapter()

Run your Connect RPCs on the Node.js http, https, or http2 modules.

// connect.ts
import { ConnectRouter } from "@connectrpc/connect";

export default function (router: ConnectRouter) {
  // implement rpc Say(SayRequest) returns (SayResponse)
  router.rpc(ElizaService, ElizaService.methods.say, async (req) => ({
    sentence: `you said: ${req.sentence}`,
  }));
}
// server.ts
import * as http2 from "http2";
+ import routes from "connect";
+ import { connectNodeAdapter } from "@connectrpc/connect-node";

http2.createServer(
+ connectNodeAdapter({ routes }) // responds with 404 for other requests
).listen(8080);

With that server running, you can make requests with any gRPC, gRPC-Web, or Connect client.

buf curl with the gRPC protocol:

buf curl --schema buf.build/connectrpc/eliza \
  --protocol grpc --http2-prior-knowledge \
  -d '{"sentence": "I feel happy."}' \
  http://localhost:8080/connectrpc.eliza.v1.ElizaService/Say

curl with the Connect protocol:

curl \
    --header "Content-Type: application/json" \
    --data '{"sentence": "I feel happy."}' \
     --http2-prior-knowledge \
    http://localhost:8080/connectrpc.eliza.v1.ElizaService/Say

Node.js with the gRPC protocol:

import { createClient } from "@connectrpc/connect";
import { createGrpcTransport } from "@connectrpc/connect-node";
import { ElizaService } from "./gen/eliza_connect.js";

const transport = createGrpcTransport({
  baseUrl: "http://localhost:8080",
  httpVersion: "2",
});

const client = createClient(ElizaService, transport);
const { sentence } = await client.say({ sentence: "I feel happy." });
console.log(sentence); // you said: I feel happy.

A client for the web browser actually looks identical to this example - it would simply use createConnectTransport from @connectrpc/connect-web instead.

Getting started

To get started with Connect, head over to the docs for a tutorial, or take a look at our example.

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Package last updated on 11 Oct 2024

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