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authorErlang/OTP <[email protected]>2009-11-20 14:54:40 +0000
committerErlang/OTP <[email protected]>2009-11-20 14:54:40 +0000
commit84adefa331c4159d432d22840663c38f155cd4c1 (patch)
treebff9a9c66adda4df2106dfd0e5c053ab182a12bd /lib/inets/src/http_server/mod_alias.erl
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The R13B03 release.OTP_R13B03
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+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 1997-2009. All Rights Reserved.
+%%
+%% The contents of this file are subject to the Erlang Public License,
+%% Version 1.1, (the "License"); you may not use this file except in
+%% compliance with the License. You should have received a copy of the
+%% Erlang Public License along with this software. If not, it can be
+%% retrieved online at http://www.erlang.org/.
+%%
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and limitations
+%% under the License.
+%%
+%% %CopyrightEnd%
+%%
+%%
+-module(mod_alias).
+
+-export([do/1,
+ real_name/3,
+ real_script_name/3,
+ default_index/2,
+ load/2,
+ store/2,
+ path/3]).
+
+-include("httpd.hrl").
+
+-define(VMODULE,"ALIAS").
+
+%% do
+
+do(Info) ->
+ case proplists:get_value(status, Info#mod.data) of
+ %% A status code has been generated!
+ {_StatusCode, _PhraseArgs, _Reason} ->
+ {proceed,Info#mod.data};
+ %% No status code has been generated!
+ undefined ->
+ case proplists:get_value(response, Info#mod.data) 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) ->
+ {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 /= $/ ->
+ 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",
+ "<HTML>\n<HEAD>\n<TITLE>",ReasonPhrase,
+ "</TITLE>\n</HEAD>\n"
+ "<BODY>\n<H1>",ReasonPhrase,
+ "</H1>\n", Message,
+ "\n</BODY>\n</HTML>\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 inets_regexp:match(RequestURI, "^" ++ FakeName) of
+ {match, _, _} ->
+ {ok, ActualName, _} = inets_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 inets_regexp:match(RequestURI,"^"++FakeName) of
+ {match,_,_} ->
+ {ok,ActualName,_}=inets_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 proplists:get_value(real_name, Data) 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("DirectoryIndex " ++ DirectoryIndex, []) ->
+ {ok, DirectoryIndexes} = inets_regexp:split(DirectoryIndex," "),
+ {ok,[], {directory_index, DirectoryIndexes}};
+load("Alias " ++ Alias,[]) ->
+ case inets_regexp:split(Alias," ") of
+ {ok, [FakeName, RealName]} ->
+ {ok,[],{alias,{FakeName,RealName}}};
+ {ok, _} ->
+ {error,?NICE(httpd_conf:clean(Alias)++" is an invalid Alias")}
+ end;
+load("ScriptAlias " ++ ScriptAlias, []) ->
+ case inets_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.
+
+store({directory_index, Value} = Conf, _) when is_list(Value) ->
+ case is_directory_index_list(Value) of
+ true ->
+ {ok, Conf};
+ false ->
+ {error, {wrong_type, {directory_index, Value}}}
+ end;
+store({directory_index, Value}, _) ->
+ {error, {wrong_type, {directory_index, Value}}};
+store({alias, {Fake, Real}} = Conf, _) when is_list(Fake),
+ is_list(Real) ->
+ {ok, Conf};
+store({alias, Value}, _) ->
+ {error, {wrong_type, {alias, Value}}};
+store({script_alias, {Fake, Real}} = Conf, _) when is_list(Fake),
+ is_list(Real) ->
+ {ok, Conf};
+store({script_alias, Value}, _) ->
+ {error, {wrong_type, {script_alias, Value}}}.
+
+is_directory_index_list([]) ->
+ true;
+is_directory_index_list([Head | Tail]) when is_list(Head) ->
+ is_directory_index_list(Tail);
+is_directory_index_list(_) ->
+ false.
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