%% ``Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
%% You may obtain a copy of the License at
%%
%% http://www.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing, software
%% distributed under the License is distributed on an "AS IS" BASIS,
%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
%% See the License for the specific language governing permissions and
%% limitations under the License.
%%
%% The Initial Developer of the Original Code is Ericsson Utvecklings AB.
%% Portions created by Ericsson are Copyright 1999, Ericsson Utvecklings
%% AB. All Rights Reserved.''
%%
%% $Id: mod_alias.erl,v 1.1 2008/12/17 09:53:34 mikpe Exp $
%%
-module(mod_alias).
-export([do/1,real_name/3,real_script_name/3,default_index/2,load/2,path/3]).
-include("httpd.hrl").
%% do
do(Info) ->
?DEBUG("do -> entry",[]),
case httpd_util:key1search(Info#mod.data,status) of
%% A status code has been generated!
{StatusCode,PhraseArgs,Reason} ->
{proceed,Info#mod.data};
%% No status code has been generated!
undefined ->
case httpd_util:key1search(Info#mod.data,response) of
%% No response has been generated!
undefined ->
do_alias(Info);
%% A response has been generated or sent!
Response ->
{proceed,Info#mod.data}
end
end.
do_alias(Info) ->
?DEBUG("do_alias -> Request URI: ~p",[Info#mod.request_uri]),
{ShortPath,Path,AfterPath} =
real_name(Info#mod.config_db,Info#mod.request_uri,
httpd_util:multi_lookup(Info#mod.config_db,alias)),
%% Relocate if a trailing slash is missing else proceed!
LastChar = lists:last(ShortPath),
case file:read_file_info(ShortPath) of
{ok,FileInfo} when FileInfo#file_info.type == directory,LastChar /= $/ ->
?LOG("do_alias -> ~n"
" ShortPath: ~p~n"
" LastChar: ~p~n"
" FileInfo: ~p",
[ShortPath,LastChar,FileInfo]),
ServerName = httpd_util:lookup(Info#mod.config_db,server_name),
Port = port_string(httpd_util:lookup(Info#mod.config_db,port,80)),
URL = "http://"++ServerName++Port++Info#mod.request_uri++"/",
ReasonPhrase = httpd_util:reason_phrase(301),
Message = httpd_util:message(301,URL,Info#mod.config_db),
{proceed,
[{response,
{301, ["Location: ", URL, "\r\n"
"Content-Type: text/html\r\n",
"\r\n",
"\n\n",ReasonPhrase,
"\n\n"
"\n",ReasonPhrase,
"
\n", Message,
"\n\n\n"]}}|
[{real_name,{Path,AfterPath}}|Info#mod.data]]};
NoFile ->
{proceed,[{real_name,{Path,AfterPath}}|Info#mod.data]}
end.
port_string(80) ->
"";
port_string(Port) ->
":"++integer_to_list(Port).
%% real_name
real_name(ConfigDB, RequestURI,[]) ->
DocumentRoot = httpd_util:lookup(ConfigDB, document_root, ""),
RealName = DocumentRoot++RequestURI,
{ShortPath, _AfterPath} = httpd_util:split_path(RealName),
{Path, AfterPath}=httpd_util:split_path(default_index(ConfigDB,RealName)),
{ShortPath, Path, AfterPath};
real_name(ConfigDB, RequestURI, [{FakeName,RealName}|Rest]) ->
case regexp:match(RequestURI, "^"++FakeName) of
{match, _, _} ->
{ok, ActualName, _} = regexp:sub(RequestURI,
"^"++FakeName, RealName),
{ShortPath, _AfterPath} = httpd_util:split_path(ActualName),
{Path, AfterPath} =
httpd_util:split_path(default_index(ConfigDB, ActualName)),
{ShortPath, Path, AfterPath};
nomatch ->
real_name(ConfigDB,RequestURI,Rest)
end.
%% real_script_name
real_script_name(ConfigDB,RequestURI,[]) ->
not_a_script;
real_script_name(ConfigDB,RequestURI,[{FakeName,RealName}|Rest]) ->
case regexp:match(RequestURI,"^"++FakeName) of
{match,_,_} ->
{ok,ActualName,_}=regexp:sub(RequestURI,"^"++FakeName,RealName),
httpd_util:split_script_path(default_index(ConfigDB,ActualName));
nomatch ->
real_script_name(ConfigDB,RequestURI,Rest)
end.
%% default_index
default_index(ConfigDB, Path) ->
case file:read_file_info(Path) of
{ok, FileInfo} when FileInfo#file_info.type == directory ->
DirectoryIndex = httpd_util:lookup(ConfigDB, directory_index, []),
append_index(Path, DirectoryIndex);
_ ->
Path
end.
append_index(RealName, []) ->
RealName;
append_index(RealName, [Index|Rest]) ->
case file:read_file_info(filename:join(RealName, Index)) of
{error,Reason} ->
append_index(RealName, Rest);
_ ->
filename:join(RealName,Index)
end.
%% path
path(Data, ConfigDB, RequestURI) ->
case httpd_util:key1search(Data,real_name) of
undefined ->
DocumentRoot = httpd_util:lookup(ConfigDB, document_root, ""),
{Path,AfterPath} =
httpd_util:split_path(DocumentRoot++RequestURI),
Path;
{Path,AfterPath} ->
Path
end.
%%
%% Configuration
%%
%% load
load([$D,$i,$r,$e,$c,$t,$o,$r,$y,$I,$n,$d,$e,$x,$ |DirectoryIndex],[]) ->
{ok, DirectoryIndexes} = regexp:split(DirectoryIndex," "),
{ok,[], {directory_index, DirectoryIndexes}};
load([$A,$l,$i,$a,$s,$ |Alias],[]) ->
case regexp:split(Alias," ") of
{ok, [FakeName, RealName]} ->
{ok,[],{alias,{FakeName,RealName}}};
{ok, _} ->
{error,?NICE(httpd_conf:clean(Alias)++" is an invalid Alias")}
end;
load([$S,$c,$r,$i,$p,$t,$A,$l,$i,$a,$s,$ |ScriptAlias],[]) ->
case regexp:split(ScriptAlias," ") of
{ok, [FakeName, RealName]} ->
%% Make sure the path always has a trailing slash..
RealName1 = filename:join(filename:split(RealName)),
{ok, [], {script_alias,{FakeName, RealName1++"/"}}};
{ok, _} ->
{error, ?NICE(httpd_conf:clean(ScriptAlias)++
" is an invalid ScriptAlias")}
end.