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<  Erlyweb mailing list  ~  bug: annoying double slash in function a/? when app root is
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Posted: Sun Aug 03, 2008 10:42 pm Reply with quote
Guest
Haha, the output should also be reversed Razz.

On Aug 4, 12:40 am, Buggaboo <buggas...@gmail.com> wrote:
> Hi,
>
> My get_app_root patch could be simplified if one doesn't use the
> lists:split/? function.
>
> Just do this:
>
> get_app_root (A) ->
> ServerPath = yaws_arg:server_path(A)
> , AppModData = yaws_arg:appmoddata(A)
> , ServerPath -- AppModData.
>
> This has a major problem.
>
> Suppose the approot contains the string "abcd". Suppose there's a
> component also called "abcd".
>
> "/abcdtest/abcd" -- "abcd". Guess which one gets removed. The intended
> effect is to remove the 2nd instance of "abcd" from left to right.
>
> One could reverse both appmoddata and server_path, then subtract the
> reversed appmoddata from the server_path. That would solve the
> abovementioned problem. I think it could be cheaper and easier than
> the present solution provided by Yariv.
>
> get_app_root (A) ->
> ServerPath = yaws_arg:server_path(A)
> , AppModData = yaws_arg:appmoddata(A)
> , lists:reverse(ServerPath) -- lists:reverse(AppModData).
>
> The cheapest solution would be to store this value somewhere
> permanently... magically, like the magic model and magic controller.
> Yariv what do you think?
>
> For instance:
>
> erlyweb_<project>:get_constant()... like app_root, app_name etc.
>
> Compute constants only once.
>
> Bye.
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