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•Created by doc on 7/4/2023 in #❓-help

trpc + fastify POST request not working

I have a trpc mutation like this:

create: publicProcedure
    .input(z.object({ title: z.string() }))
    .mutation(({ input, ctx }) => {
      const id = db.posts.length + 1;
      const post = { id, title: input.title };
      db.posts.push(post);
      return post;
    }),

create: publicProcedure
    .input(z.object({ title: z.string() }))
    .mutation(({ input, ctx }) => {
      const id = db.posts.length + 1;
      const post = { id, title: input.title };
      db.posts.push(post);
      return post;
    }),

I am trying to call it via HTTP:

curl --request POST \
  --url http://localhost:2022/trpc/posts.create \
  --header 'Content-Type: application/json' \
  --data '{
    "title": "hello"
}'

curl --request POST \
  --url http://localhost:2022/trpc/posts.create \
  --header 'Content-Type: application/json' \
  --data '{
    "title": "hello"
}'

it errors with:

"code": -32600, "data": { "code": "BAD_REQUEST", "httpStatus": 400, .....}

Not sure whats going on or why is it erroring. Any help is appreciated 🙂

"dependencies": {
    "@fastify/websocket": "^7.1.2",
    "@trpc/client": "^10.33.0",
    "@trpc/server": "^10.33.0",
    "fastify": "^4.13.0",
    "node-fetch": "^3.3.1",
    "superjson": "^1.12.4",
    "tslib": "^2.5.0",
    "ws": "^8.0.0",
    "zod": "^3.0.0"
  },

"dependencies": {
    "@fastify/websocket": "^7.1.2",
    "@trpc/client": "^10.33.0",
    "@trpc/server": "^10.33.0",
    "fastify": "^4.13.0",
    "node-fetch": "^3.3.1",
    "superjson": "^1.12.4",
    "tslib": "^2.5.0",
    "ws": "^8.0.0",
    "zod": "^3.0.0"
  },

3 replies

TtRPC

•Created by doc on 1/27/2023 in #❓-help

TRPCClientError: Unexpected end of JSON input

Hey I am running into this issue when calling a mutateAsync in production in Vercel (the error does not appear in localhost dev mode).

TRPCClientError: Unexpected end of JSON input

My code base is so large that I am not sure where do I start to debug. Are there any best practices that I should follow to avoid this error? It is similar to this issue: https://github.com/trpc/trpc/discussions/1847#discussioncomment-4244990

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