Superstruct validator middleware for Hono

Validator middleware using Superstruct for Hono applications.

You can write a schema with Superstruct and validate the incoming values.

Usage

import { number, object, string } from "superstruct";
import { sValidator } from "hono-superstruct-validator";

const schema = object({
	name: string(),
	age: number()
});

app.post("/author", sValidator("json", schema), c => {
	const data = c.req.valid("json");
	return c.json({
		success: true,
		message: `${data.name} is ${data.age}`
	});
});

By default, if the incoming data does not match the given schema, a JSON object will be returned to the caller, with a status of 400. The response will have the following interface:

interface ResponseBody {
	message: string;
}

The message will, by default, be the message property of the relevant StructError.

If you wish to handle errors differently, you may include a callback function:

app.post(
	"/post",
	sValidator("json", schema, (result, c) => {
		return c.text("Invalid!", 400);
	})
	//...
);

At the moment, there is no opportunity to recover from the error. If the input data is bad, the middleware will fail out and respond to the caller.

Author

Average Helper https://git.average.name/AverageHelper

Much of this work is based on Yusuke Wada's wonderful work on @hono/zod-validator.

License

MIT

Contributing

This project lives primarily at git.average.name. Read-only mirrors also exist on Codeberg and GitHub. Issues or pull requests should be filed at git.average.name. You may sign in or create an account directly, or use one of several OAuth 2.0 providers.