mime lookup for application/json returns false

[pcgilday]

Passing "application/json" to the mime.lookup returns false. I am assuming this is a bug and that passing a valid mime-type to mime.lookup should return that same mime-type. Also, the README says this behaves similarly to the mime module which handles this type the way I would expect. Examples below.

Using mime-types

12:33 $ node
> const mime = require('mime-types')
> mime.lookup('application/json')
false
> mime.lookup('json')
'application/json'
>

Using mime

12:38 $ node
> const mime = require('mime')
> mime.lookup('application/json')
'application/json'
> mime.lookup('json')
'application/json'
>

If this is the intended behavior, then it should probably be mentioned as a difference between this and the mime package (along with the other differences called out) in the README.

Happy to help out with a PR if this is indeed a bug and not the intended behavior

[dougwilson]

You're encountering a bug in mime itself. You see, you're passing in application/json and that module incorrectly thing you're looking for the file json and then incorrectly things the file extension for that is json. You can see it's not echoing the type if you do

$ node
> const mime = require('mime')
> mime.lookup('text/plain')
'application/octet-stream'
>

[dougwilson]

This is the bug: broofa/mime#113

[dougwilson]

And this module fixed the bug (which is one of the purposes of this module: incorporate bug fixes that mime is not fixing :) ).

[dougwilson]

I updated the blurb in the README to note that there are bug fixes to the .lookup method compared to the mime module.

[pcgilday]

Thank you for clarifying, I misunderstood the use case for the lookup function initially.