500 Response with JSON Parser

Questions / Help
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1

Hello there,

I am currently trying to get a minimal webserver running with Cowboy and Plug. The purpose of it is to handle webhooks (JSON payloads on a POST endpoint) but I am struggling to get the JSON parsed. I’ve added the Parser plug with json to my module but as soon as I send a request to that endpoint (or any other endpoint) with a JSON payload, I receive an 500 error with no additionall logging.

Here’s my modules code: https://gist.github.com/Rukenshia/9688dca4d3af63188ae45185f1a65f4d

Thanks,

2

turns out I forgot to add poison to my dependencies.

1 Like
3

You do only allow text/* MIME-type while you send application/json. Try changing your :pass config or temporarily use another mediatype with curl.

4

I’m still surprised about the lack of useful error output. Does bare Plug do some error suppression here that Phoenix doesn’t or something?

5

Phoenix adds that whole fancy error reporting page by default in your error handler (only in dev), it is configured on/off by the option in your dev.exs file. :slight_smile: