1 files changed, 73 insertions, 0 deletions
diff --git a/src/couch_inets/mod_head.erl b/src/couch_inets/mod_head.erl
new file mode 100644
index 00000000..3b78ff42
--- /dev/null
+++ b/src/couch_inets/mod_head.erl
@@ -0,0 +1,73 @@
+%% ``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 via the world wide web 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.
+%% 
+%% The Initial Developer of the Original Code is Ericsson Utvecklings AB.
+%% Portions created by Ericsson are Copyright 1999, Ericsson Utvecklings
+%% AB. All Rights Reserved.''
+%% 
+%%     $Id$
+%%
+-module(mod_head).
+-export([do/1]).
+
+-include("httpd.hrl").
+
+-define(VMODULE,"HEAD").
+
+%% do
+
+do(Info) ->
+    case Info#mod.method of
+	"HEAD" ->
+	    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_head(Info);
+			%% A response has been sent! Nothing to do about it!
+			{already_sent, _StatusCode, _Size} ->
+			    {proceed,Info#mod.data};
+			%% 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.