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%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 1997-2010. All Rights Reserved.
%%
%% 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.
%%
%% %CopyrightEnd%
%%
%%
-module(mod_head).
-export([do/1]).
-include("httpd.hrl").
-define(VMODULE,"HEAD").
%% do
do(Info) ->
case Info#mod.method of
"HEAD" ->
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_head(Info);
%% A response has been sent! Nothing to do about it!
{already_sent, _StatusCode, _Size} ->
{proceed,Info#mod.data};
{response, Header, _Body} -> %% New way
{proceed,
lists:keyreplace(response, 1, Info#mod.data,
{response, Header, nobody})};
%% A response has been generated!
{_StatusCode, _Response} ->
{proceed,Info#mod.data}
end
end;
%% Not a HEAD method!
_ ->
{proceed,Info#mod.data}
end.
do_head(Info) ->
Path = mod_alias:path(Info#mod.data,
Info#mod.config_db,
Info#mod.request_uri),
Suffix = httpd_util:suffix(Path),
%% Does the file exists?
case file:read_file_info(Path) of
{ok, FileInfo} ->
MimeType =
httpd_util:lookup_mime_default(Info#mod.config_db,
Suffix,"text/plain"),
Length = io_lib:write(FileInfo#file_info.size),
Head =
[{content_type, MimeType},
{content_length, Length}, {code,200}],
{proceed,[{response, {response, Head, nobody}} | Info#mod.data]};
{error, Reason} ->
Status = httpd_file:handle_error(Reason, "access", Info, Path),
{proceed,
[{status, Status} | Info#mod.data]}
end.
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