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nitro src nitro_static.erl
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src/nitro_static.erl

-module(nitro_static).
-description('NITRO Static bridge for MAD containers').
-author('Maxim Sokhatsky').
-compile(export_all).
-include_lib("kernel/include/file.hrl").
init(_, _, _) -> {upgrade, protocol, cowboy_rest}.
rest_init(Req, {dir, Path, Extra}) when is_binary(Path) -> rest_init(Req, {dir, binary_to_list(Path), Extra});
rest_init(Req, {dir, Path, Extra}) ->
{PathInfo, Req2} = cowboy_req:path_info(Req),
Info = {ok, #file_info{type=regular,size=0}},
FileName = filename:join([Path|PathInfo]),
{ok, Req2, {FileName, Info, Extra}}.
malformed_request(Req, State) -> {State =:= error, Req, State}.
forbidden(Req, State={_, {ok, #file_info{type=directory}}, _}) -> {true, Req, State};
forbidden(Req, State={_, {error, eacces}, _}) -> {true, Req, State};
forbidden(Req, State={_, {ok, #file_info{access=Access}}, _}) when Access =:= write; Access =:= none -> {true, Req, State};
forbidden(Req, State) -> {false, Req, State}.
fixpath(Path) -> {Module,Fun} = application:get_env(n2o,fixpath,{nitro_static,fix}),
Module:Fun(Path).
fix(A) -> A.
content_types_provided(Req, State={Path, _, Extra}) ->
case lists:keyfind(mimetypes, 1, Extra) of
false -> {[{cow_mimetypes:web(Path), get_file}], Req, State};
{mimetypes, Module, Function} ->
{[{Module:Function(fixpath(Path)), get_file}], Req, State};
{mimetypes, Type} -> {[{Type, get_file}], Req, State}
end.
resource_exists(Req, State={_, {ok, #file_info{type=regular}}, _}) -> {true, Req, State};
resource_exists(Req, State) -> {false, Req, State}.
generate_etag(Req, State={Path, {ok, #file_info{size=Size, mtime=Mtime}}, Extra}) ->
case lists:keyfind(etag, 1, Extra) of
false -> {generate_default_etag(Size, Mtime), Req, State};
{etag, Module, Function} -> {Module:Function(Path, Size, Mtime), Req, State};
{etag, false} -> {undefined, Req, State}
end.
generate_default_etag(Size, Mtime) ->
{strong, list_to_binary(integer_to_list(erlang:phash2({Size, Mtime}, 16#ffffffff)))}.
last_modified(Req, State={_, {ok, #file_info{mtime=Modified}}, _}) -> {Modified, Req, State}.
get_file(Req, State={P, {ok, #file_info{size=_Size}}, _}) ->
Path = fixpath(P),
StringPath = nitro:to_list(unicode:characters_to_binary(Path,utf8,utf8)),
[_Type,Name|RestPath] = filename:split(StringPath),
FileName = filename:absname(StringPath),
Raw = case file:read_file(FileName) of
{ok,Bin} -> Bin;
{error,_} ->
case mad_repl:load_file(StringPath) of
{ok,ETSFile} -> ETSFile;
{error,_} ->
case file:read_file(filename:join([ code:lib_dir(list_to_atom(Name))|RestPath])) of
{ok,ReleaseFile} -> ReleaseFile;
{error,_} -> <<>> end end end,
Sendfile = fun (Socket, Transport) -> Transport:send(Socket, Raw) end,
{{stream, size(Raw), Sendfile}, Req, State}.