bodySchema

Creates a Zod schema that validates the body of a request. Supports JSON, FormData (multipart/form-data and application/x-www-form-urlencoded), and plain text bodies.

Signature

function bodySchema<
  T extends {
    json?: z.ZodTypeAny;
    formData?: z.ZodTypeAny;
    text?: z.ZodTypeAny;
  }
>(schemas: T): z.ZodType<{ body: BodyType }>;

Parameters

schemas (required): An object with one or more of:
- json: Zod schema for JSON request bodies
- formData: Zod schema for form data (multipart/form-data or application/x-www-form-urlencoded)
- text: Zod schema for plain text request bodies

Returns

A preprocessed Zod schema that validates the request body based on the Content-Type header.

JSON Body

import { bodySchema, requestSchema } from "@nicnocquee/zod-request";
import { z } from "zod";

const body = bodySchema({
  json: z.object({
    name: z.string(),
    age: z.number(),
  }),
});

export async function POST(request: Request) {
  const validated = await requestSchema({
    body,
  }).parseAsync(request);

  // bodyObject contains the validated body for direct property access
  const bodyObject = validated.bodyObject; // { name: string, age: number }
  const name = bodyObject.name; // string
  const age = bodyObject.age; // number
}

FormData Body

const body = bodySchema({
  formData: z.object({
    name: z.string(),
    email: z.string().email(),
  }),
});

Supports both multipart/form-data and application/x-www-form-urlencoded content types.

Text Body

const body = bodySchema({
  text: z.string().min(1),
});

Content-Type Detection

The function automatically detects the content type from the Content-Type header:

application/json → uses json schema
multipart/form-data or application/x-www-form-urlencoded → uses formData schema
Other content types → uses text schema (if provided)