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unnoq/orpc: Typesafe APIs Made Simple πŸͺ„

Typesafe APIs Made Simple πŸͺ„

oRPC is a powerful combination of RPC and OpenAPI, makes it easy to build APIs that are end-to-end type-safe and adhere to OpenAPI standards

You can find the full documentation here.

This is a quick overview of how to use oRPC. For more details, please refer to the documentation.

  1. Define your router:

    import type { IncomingHttpHeaders } from 'node:http'
    import { ORPCError, os } from '@orpc/server'
    import * as z from 'zod'
    
    const PlanetSchema = z.object({
      id: z.number().int().min(1),
      name: z.string(),
      description: z.string().optional(),
    })
    
    export const listPlanet = os
      .input(
        z.object({
          limit: z.number().int().min(1).max(100).optional(),
          cursor: z.number().int().min(0).default(0),
        }),
      )
      .handler(async ({ input }) => {
        // your list code here
        return [{ id: 1, name: 'name' }]
      })
    
    export const findPlanet = os
      .input(PlanetSchema.pick({ id: true }))
      .handler(async ({ input }) => {
        // your find code here
        return { id: 1, name: 'name' }
      })
    
    export const createPlanet = os
      .$context<{ headers: IncomingHttpHeaders }>()
      .use(({ context, next }) => {
        const user = parseJWT(context.headers.authorization?.split(' ')[1])
    
        if (user) {
          return next({ context: { user } })
        }
    
        throw new ORPCError('UNAUTHORIZED')
      })
      .input(PlanetSchema.omit({ id: true }))
      .handler(async ({ input, context }) => {
        // your create code here
        return { id: 1, name: 'name' }
      })
    
    export const router = {
      planet: {
        list: listPlanet,
        find: findPlanet,
        create: createPlanet
      }
    }
  2. Create your server:

    import { createServer } from 'node:http'
    import { RPCHandler } from '@orpc/server/node'
    import { CORSPlugin } from '@orpc/server/plugins'
    
    const handler = new RPCHandler(router, {
      plugins: [new CORSPlugin()]
    })
    
    const server = createServer(async (req, res) => {
      const result = await handler.handle(req, res, {
        context: { headers: req.headers }
      })
    
      if (!result.matched) {
        res.statusCode = 404
        res.end('No procedure matched')
      }
    })
    
    server.listen(
      3000,
      '127.0.0.1',
      () => console.log('Listening on 127.0.0.1:3000')
    )
  3. Create your client:

    import type { RouterClient } from '@orpc/server'
    import { createORPCClient } from '@orpc/client'
    import { RPCLink } from '@orpc/client/fetch'
    
    const link = new RPCLink({
      url: 'http://127.0.0.1:3000',
      headers: { Authorization: 'Bearer token' },
    })
    
    export const orpc: RouterClient<typeof router> = createORPCClient(link)
  4. Consume your API:

    import { orpc } from './client'
    
    const planets = await orpc.planet.list({ limit: 10 })
  5. Generate OpenAPI Spec:

    import { OpenAPIGenerator } from '@orpc/openapi'
    import { ZodToJsonSchemaConverter } from '@orpc/zod/zod4'
    
    const generator = new OpenAPIGenerator({
      schemaConverters: [new ZodToJsonSchemaConverter()]
    })
    
    const spec = await generator.generate(router, {
      info: {
        title: 'Planet API',
        version: '1.0.0'
      }
    })
    
    console.log(spec)

oRPC is inspired by existing solutions that prioritize type safety and developer experience. Special acknowledgments to:

Distributed under the MIT License. See LICENSE for more information.


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