Remove handler() function
Close the connection should be the work of another module.
Throw away bad code
Don't let me write code when I am tired.
Rewrite reply() being conscious
Add send()
No need to have everything uselessly complicated.
Add head()
The head() function replies to HEAD methods, and is used by
the future get() function.
Share make_path()
The make_path() function is needed out there.
Add get()
Change file existence test
Change F_OK in acces() to R_OK.
Proofreading.
It is actually better than the previous one.