Adjust file handling to handle loading from bundles

[drekka]

I was trying to load files from a bundle of files passed to a test suite. In my server setup I had this middleware:

let configuration = HBApplication.Configuration()
let server = HBApplication(configuration: configuration)
server.middleware.add(HBFileMiddleware(Bundle.testData.filePath.absoluteString, application: server))
try server.start()

However whenever I requested a file from the testData bundle HBFileMiddleware failed to find it.

I debugged through and found that the string based root folder was being set to a file:///... path which was not understood by the file code attempting to load the file.

This PR:

• Converts rootFolder to be a file URL instead of a string.
• Updates usage of rootFolder based on it now being a URL. ie. rootFolder.relativePath.
• Removes checking for a trailing / which is no longer needed.

Testing

After the code change all Hummingbird test ran green without change.

[codecov]

Codecov Report

Merging #131 (e6a04b5) into main (9eff305) will increase coverage by 0.02%.
The diff coverage is 83.33%.

@@            Coverage Diff             @@
##             main     #131      +/-   ##
==========================================
+ Coverage   78.36%   78.38%   +0.02%     
==========================================
  Files          71       71              
  Lines        3046     3040       -6     
==========================================
- Hits         2387     2383       -4     
+ Misses        659      657       -2     

Impacted Files	Coverage Δ
...s/HummingbirdFoundation/Files/FileMiddleware.swift	87.41% <81.81%> (+0.83%)	⬆️
Sources/HummingbirdFoundation/Cookies/Cookie.swift	75.75% <100.00%> (ø)

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[adam-fowler]

You need Nick Lockwood's swiftformat installed. And then you should run ./script/validate.sh
Otherwise this is good

[drekka]

Yep. I think my settings for SwiftFormat might be slightly different to yours as when I originally ran it here it changed a bunch of lines. Anyway, :-) Ran scripts/validate.sh which changed 3 files and committed the results.

[adam-fowler]

This is released in v0.16.1