Refactor _static_request_handler

[ChihweiLHBird]

1. Wrap logics that processes file path to a method.
2. Use built in update method to merge two dictionaries.
3. Fixed an issue that when if-modified-since in request header is larger than the file modified time, 200 is still responded. 304 might be more appropriate.

[codecov]

Codecov Report

Base: 88.425% // Head: 88.430% // Increases project coverage by +0.005% 🎉

Coverage data is based on head (81336f0) compared to base (1650331).
Patch coverage: 100.000% of modified lines in pull request are covered.

Additional details and impacted files

@@              Coverage Diff              @@
##              main     #2533       +/-   ##
=============================================
+ Coverage   88.425%   88.430%   +0.005%     
=============================================
  Files           78        78               
  Lines         6471      6474        +3     
  Branches      1247      1246        -1     
=============================================
+ Hits          5722      5725        +3     
  Misses         517       517               
  Partials       232       232               

Impacted Files	Coverage Δ
sanic/mixins/routes.py	93.822% <100.000%> (+0.072%)	⬆️

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[ahopkins]

Not sure that this adds much.

[ChihweiLHBird]

Not sure that this adds much.

Just added some, lol

[Tronic]

Seems useful to me and it doesn't add much code, so that is also good. Header dict update is much faster than Python loop. Should keep an eye out for such loops that are better done with C builtins (perhaps there are static analyser tools that could pick up such patterns in the whole codebase?).

[ChihweiLHBird]

Seems useful to me and it doesn't add much code, so that is also good. Header dict update is much faster than Python loop. Should keep an eye out for such loops that are better done with C builtins (perhaps there are static analyser tools that could pick up such patterns in the whole codebase?).

Thanks for the feedback. I never heard about a such tool. Let me do a search for it.