How to check if a payload is attached with a Post call?

[maxtrunk]

Hi, I am new to HonoJs, and trying to figure out how to check if a post request has json payload attached. Hope someone can help me out. Thanks in advance. So here is my code:

const factory = createFactory()

export const addClient = factory.createHandlers(async (c: Context) => {
	try {		
		const data =  c.req.json()
		
		return c.json({ "msg": "Success" }, 200)
	} catch (e) {
		return c.json({ "error": e ? e.toString() : "Unknown error on token debugging" }, 401)
	}

So, If I call my api via a POST request without a payload, then I am getting this error " SyntaxError: Unexpected end of JSON input"

I've tried the following solution, but none of them works:

// Method 1:
	const data =  c.req.json()
	if(!data){
		return c.json({ "msg": "Vaild payload is required" }, 401)
	} // the if never triggered, because the error occurred in c.req.json()
// Method 2:
	const data = c.req.valid('json')
        // "data" always return "undefined" even I pass in json payload 

So how did u guy check the payload exists in Hono?

[NicoPlyley]

c.req.json() is a asynchronous you just need to await it.

Hono will throw an error as well if there was no json sent, and you can customize the error on app.onError

You will still need to check is an empty json object was sent.

[maxtrunk]

app.onError work!!! Thank you

[NicoPlyley]

Perfect, you can go ahead and close this out