fix unicode url 404 error

[newbienewbie]

When serving a static directory whose path string contains unicode codes , let's say

• url path string = blog/categories/大道/index.html
• physical file path string = blog/categories/大道/index.html

The DefaultFileMiddlware gets the directory by var dirContents = _fileProvider.GetDirectoryContents(subpath.Value); . And now when we check whether the path of blog/categories/大道/ exists as below :

StaticFiles/src/Microsoft.AspNetCore.StaticFiles/DefaultFilesMiddleware.cs

Line 69 in 4c8df8e

if (dirContents.Exists)

The result will be true .

However , when coming into the default index.html , the DefaultFileMiddlware checks the file path by :

var file = _fileProvider.GetFileInfo(subpath + defaultFile);

Here the subpath is often urlencoded , so the file path will be something as below :

"blog\\categories\\%E5%A4%A7%E9%81%93\\index.html"

As a result , file.Exists will return false .

[Tratcher]

Interesting find. Can you:
A) File an issue with these details, issues are easier to track.
B) Add a test for this scenario.
C) Rebase onto the release/2.2 branch, that's our upcoming release and this would be a good thing to include.

If you can't take care of these in a few days then we'll see about getting someone assigned to it.

[newbienewbie]

@Tratcher Hi, I've created a new issue here .
I'll add tests for this scenario .

[poke]

Superseded by #257.