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@connectrpc/connect-express
Advanced tools
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.
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-express
provides a middleware for Express, the fast,
unopinionated, minimalist web framework for Node.js
Adds your Connect RPCs to an Express server.
// 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 http from "http";
import express from "express";
+ import routes from "connect";
+ import { expressConnectMiddleware } from "@connectrpc/connect-express";
const app = express();
+ app.use(expressConnectMiddleware({
+ routes
+ }));
http.createServer(app).listen(8080);
With that server running, you can make requests with any gRPC-web or Connect client.
curl
with the Connect protocol:
curl \
--header "Content-Type: application/json" \
--data '{"sentence": "I feel happy."}' \
http://localhost:8080/connectrpc.eliza.v1.ElizaService/Say
Node.js with the gRPC-web protocol (using a transport from @connectrpc/connect-node):
import { createPromiseClient } from "@connectrpc/connect";
import { createGrpcWebTransport } from "@connectrpc/connect-node";
import { ElizaService } from "./gen/eliza_connect.js";
const transport = createGrpcWebTransport({
baseUrl: "http://localhost:8080",
httpVersion: "1.1",
});
const client = createPromiseClient(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.
Note that support for gRPC is limited, since many gRPC clients require HTTP/2,
and Express does not support the Node.js http2
module.
To get started with Connect, head over to the docs for a tutorial, or take a look at our example.
FAQs
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.
The npm package @connectrpc/connect-express receives a total of 22,117 weekly downloads. As such, @connectrpc/connect-express popularity was classified as popular.
We found that @connectrpc/connect-express demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 6 open source maintainers collaborating on the project.
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