Doesn't return error message

[kelvin-zhao]

Hi guys,

I'm using

return c.text( '${ err.message }', 500 )

to return an error message, but I don't see the message being returned, just a default internal error.
I did a console.log on my api, it does have an error message though.
How should I properly send the message back?

[linhub15]

My guess is that some code before that line is throwing the error, so by default 500 error will be returned to the browser with the internal error.

[kelvin-zhao]

The way I'm doing my code block is as follows, does the throw error in my try block doesn't hit the catch but sends the error back instantly?

app.post( '/', async ( c ) => {
	try {
		const { pin, campaign } = await c.req.json() as Payload

		If ( pin === 'xxx' ) {
			const openai = new OpenAI( { apiKey: c.env.API_KEY } )
			const result = await runOpenAI( openai, campaign, c.env.GPT_ID )

			return c.json( {
				'prediction': result.prediction,
				'summary': result.summary,
				'improvement': result.improvement,
			} )
		} else {
			throw new Error( 'wrong pin' )
		}
	} catch ( err ) {
		console.log( err.message )
		return c.text( `${ err.message }`, 500 )
	}
} )

My console.log was hit and I did get the message in my logs.

[linhub15]

Your code looks correct. Everything in the try block will be caught in your example above and returned as text the the client.

If you still see "Internal Server Error" it will be caused outside the try block.
I would need to see the stack trace in your console to see where it's coming from.

Here's a working example of returning the error message, based on your example.
https://dash.deno.com/playground/sad-rabbit-86

[kelvin-zhao]

Weirdly I removed everything on my end and leave the throw of wrong pin,
I see it being logged and still internal server error is sent back.
I'm so confused.

wrong pin
[wrangler:inf] POST / 500 Internal Server Error (3ms)

Is it the way I am taking in the response?

const res = await fetch( mode, {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
  },
    body: JSON.stringify( { pin: pin.value, campaign: campaign.value } ),
  } )
if ( !res.ok ) throw new Error( res.statusText )

When I check on res, there's no properties in there that logged the 'wrong pin' message.
Is there something else I should check on for the response text?

[linhub15]

Hard to dig any deeper without access to your code and the cloud environment settings...

Here's a few things I suggest you try to further debug this

• try running Hono locally without Wranger to find out if it's Hono, or Wrangler or your edge function provider
• remove all middleware, and then add them in one at a time to rule out if they are the cause