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< Erlyweb mailing list ~ Calculating a module/function/params URL |
| Guest |
 Posted: Mon Jan 28, 2008 11:21 pm |
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Guest
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make_url/4 calculates a URL with out the protocol://host:port/ prefix it
returns the form /base/module/function/params given a yaws arg record A,
a module name M, a function name F, and a list of parameters Params.
There may be errors in this code as it was copy and pasted from else
where and modififed here. It may also be be possible to get rid of one
of the reverses or make other optimisations. Consider this a first cut.
Todo: find protocol, host, and port used by client and include in url
add when-clauses to function
Jeff.
------
base(A) ->
L = length(yaws_arg:appmoddata(A)),
lists:reverse(lists:nthtail(L,lists:reverse(yaws_arg:server_path(A)))).
make_url(A, M, F, Params) ->
PStr = lists:foldl(fun(P, Acc) ->
PL = erlydb_base:field_to_iolist(P),
[["/" | PL] | Acc]
end,
[],
lists:reverse(Params)),
io:format("PStr ~p~n", [PStr]),
MStr = erlydb_base:field_to_iolist(M),
FStr = erlydb_base:field_to_iolist(F),
lists:flatten(base(A) ++ "/" ++ MStr ++ "/" ++ FStr ++ PStr).
test_make_url() ->
make_url(A, module, function, [1,2,3]).
--~--~---------~--~----~------------~-------~--~----~
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| Guest |
| Posted: Tue Jan 29, 2008 8:04 pm |
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Guest
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I like this functionality. I tend to hardcode my urls as strings in
the view templates, but this is a better solution because it lets you
change your URL scheme later without modifying a bunch of templates.
This could be very useful in making your URLs work both in and out of
Facebook, which annoyingly prepends all relative urls with
/[app-name]/.
A comment: if you create the url so it can be sent through a socket as
an iolist, this line is inefficient:
lists:flatten(base(A) ++ "/" ++ MStr ++ "/" ++ FStr ++ PStr).
I would rewrite it as
[base(A), $/, MStr, $/, Fstr, Pstr].
Yariv
On Jan 28, 2008 3:22 PM, jm <jeffm@ghostgun.com> wrote:
>
>
> make_url/4 calculates a URL with out the protocol://host:port/ prefix it
> returns the form /base/module/function/params given a yaws arg record A,
> a module name M, a function name F, and a list of parameters Params.
> There may be errors in this code as it was copy and pasted from else
> where and modififed here. It may also be be possible to get rid of one
> of the reverses or make other optimisations. Consider this a first cut.
>
> Todo: find protocol, host, and port used by client and include in url
> add when-clauses to function
>
> Jeff.
> ------
>
> base(A) ->
> L = length(yaws_arg:appmoddata(A)),
> lists:reverse(lists:nthtail(L,lists:reverse(yaws_arg:server_path(A)))).
>
> make_url(A, M, F, Params) ->
> PStr = lists:foldl(fun(P, Acc) ->
> PL = erlydb_base:field_to_iolist(P),
> [["/" | PL] | Acc]
> end,
> [],
> lists:reverse(Params)),
> io:format("PStr ~p~n", [PStr]),
> MStr = erlydb_base:field_to_iolist(M),
> FStr = erlydb_base:field_to_iolist(F),
> lists:flatten(base(A) ++ "/" ++ MStr ++ "/" ++ FStr ++ PStr).
>
>
> test_make_url() ->
> make_url(A, module, function, [1,2,3]).
>
> >
>
--~--~---------~--~----~------------~-------~--~----~
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| dmitriid |
| Posted: Wed Jan 30, 2008 7:34 am |
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User
Joined: 17 Aug 2006
Posts: 213
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I would also like a function without A, because A is not always available (especially in the views). Most of the time (especially in the production environment) a "/module/function/params" url is more than enough
Quote: I like this functionality. I tend to hardcode my urls as strings in the view templates, but this is a better solution because it lets you change your URL scheme later without modifying a bunch of templates. This could be very useful in making your URLs work both in and out of Facebook, which annoyingly prepends all relative urls with /[app-name]/. A comment: if you create the url so it can be sent through a socket as an iolist, this line is inefficient: lists:flatten(base(A) ++ "/" ++ MStr ++ "/" ++ FStr ++ PStr). I would rewrite it as [base(A), $/, MStr, $/, Fstr, Pstr]. Yariv On Jan 28, 2008 3:22 PM, jm <jeffm@ghostgun.com> (jeffm@ghostgun.com) wrote: [/code] Quote: make_url/4 calculates a URL with out the protocol://host:port/ prefix it returns the form /base/module/function/params given a yaws arg record A, a module name M, a function name F, and a list of parameters Params. There may be errors in this code as it was copy and pasted from else where and modififed here. It may also be be possible to get rid of one of the reverses or make other optimisations. Consider this a first cut. Todo: find protocol, host, and port used by client and include in url add when-clauses to function Jeff. ------ base(A) -> L = length(yaws_arg:appmoddata(A)), lists:reverse(lists:nthtail(L,lists:reverse(yaws_arg:server_path(A)))). make_url(A, M, F, Params) -> PStr = lists:foldl(fun(P, Acc) -> PL = erlydb_base:field_to_iolist(P), [["/" | PL] | Acc] end, [], lists:reverse(Params)), io:format("PStr ~p~n", [PStr]), MStr = erlydb_base:field_to_iolist(M), FStr = erlydb_base:field_to_iolist(F), lists:flatten(base(A) ++ "/" ++ MStr ++ "/" ++ FStr ++ PStr). test_make_url() -> make_url(A, module, function, [1,2,3]). [/code] [/code]
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