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<H1>[99s-extend] Rewriting URLs</H1>
<B>Paul Dickson</B>
<A HREF="mailto:extend%40lists.ninenines.eu?Subject=Re%3A%20%5B99s-extend%5D%20Rewriting%20URLs&In-Reply-To=%3C1422366254.30127.15.camel%40gmail.com%3E"
TITLE="[99s-extend] Rewriting URLs">pdtwonotes at gmail.com
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<I>Tue Jan 27 14:44:14 CET 2015</I>
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<PRE>Ok, here is all the code in bz_libmap.erl
execute(Req, Env) ->
Path = cowboy_req:path(Req),
Parts = filename:split(Path),
case cowboy_req:method(Req) of
<<"GET">> ->
% Check for "/music/" requests
rewrite( Parts, Req, Env );
_Other ->
{ok, Req, Env}
end.
rewrite( [<<"/">>, <<"music">>, LibName | UrlParts], Req, Env ) ->
% We want URLs of the form "/music/LIBNAME/everythingelse"
% Get library definition. If we do not know that name, then they
% are asking for something that does not exist.
case bz_db:get_library( LibName ) of
[] ->
io:format("No such library '~s'~n", [LibName] ),
{stop, cowboy_req:reply(404, Req)};
L when is_record(L,library) ->
% Replace the library name with the library base.
% This will be the head of an absolute file path.
LibBase = L#library.base,
NewPath = filename:join([LibBase | UrlParts]),
NewInfo = filename:split(NewPath),
Req2 = cowboy_req:set( [
{path_info,[NewPath]},
{path, [NewPath]}], Req),
{ok, Req2, Env}
end;
rewrite( _AnythingElse, Req, Env ) ->
{ok, Req, Env}.
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