[MIME] Expand default extension map

[NickNevzorov]

I am using packages, that depends on mime (for example, DropTarget). I need to add my file extension to default map, but it is Const

I propose change to Final, now my code is:

import 'package:mime/mime.dart' as mime;
mime.defaultExtensionMap['wxo'] = 'application/wxo';

This will give the opportunity to add own extension types in standard resolver

[lrhn]

I don't think a global mutable shared map is a good idea. Anyone can add anything to it, but they can also delete from it.

I'd rather do something more local, like a zone based override of the map.

[NickNevzorov]

I don't think a global mutable shared map is a good idea. Anyone can add anything to it, but they can also delete from it.

I'd rather do something more local, like a zone based override of the map.

I am using drop_terget, witch using mime. In my code:

if (file.mimeType == "application/wxo") ...

How can I add my custom file type to mime package ?

No i write:

if (file.name.contains('.wxo'))

But is looking not good

[lrhn]

I don't definitely agree that it's not looking as good. Maybe it's on princple.

Doing mime.defaultExtensionMap['wxo'] = 'application/wxo'; and then recognizing that the file.mimeType being application/wxo is just doing the same thing with more steps.

It's getting some other code to do your extension(file) == 'wxo' for you, but it's the same test.

But if you are otherwise using mimeType to recognize things, I can see how it's easier to do everything the same way.

(Probably should use file.name.endsWith('.wxo') just to be safe.)

This package should get a policy/process for how to get mappings added to the map.
It's clearly possible (mappings have been added in the past).
But requests for adding mappings have also been open for a long time, so it's not automatic.
(So I agree something should be done, but this isn't it.)