Empty Content-Type when using attach_file

[darthdeus]

When I attach a file via attach_file and then check the content type in the file in the params, it's empty.

However if I upload the same file in the same form manually and check the same way, I'll get a proper content type.

[darthdeus]

So I've traced this issue down to the mime-types gem, which is internally being used by rack-test to detect the content type of the file. Unfortunately it only does detection by extension name, which isn't there for the file I'm uploading (.p12)

[jnicklas]

Yeah, mime-types is not going to be perfect, unfortunately.

[phansch]

I just came across the same problem today. Trying to upload an .ics file via attach_file, it does not set the content type. However, when manually uploading the file, the content type is being set just fine (to text/calendar). Also, the mime-types gem seems to support text/calendar files: text.yaml#22

Any idea, why attach_file is not setting the content_type in this case?

[darthdeus]

@phansch I'm not sure, in my case the file type was completely missing in the mime-types, but seems you're having a different issue.

[jsgarvin]

Sorry to comment here on something that's clearly not capybara's problem, but this is the only place I've found anyone else that has run into this.

Is there a workaround? Registering the new mime-type with Mime::Type.register_alias doesn't seem to have any effect for me. I can't find anything in the mime-type gem docs regarding adding custom mime-types. Not sure what else to try. I hope I'm overlooking something obvious.