%%
%% %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_get).
-export([do/1]).
-include("httpd.hrl").
%% do
do(Info) ->
?DEBUG("do -> entry",[]),
case Info#mod.method of
"GET" ->
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_get(Info);
%% A response has been generated or sent!
_Response ->
{proceed,Info#mod.data}
end
end;
%% Not a GET method!
_ ->
{proceed,Info#mod.data}
end.
do_get(Info) ->
?DEBUG("do_get -> Request URI: ~p",[Info#mod.request_uri]),
Path = mod_alias:path(Info#mod.data, Info#mod.config_db,
Info#mod.request_uri),
send_response(Info#mod.socket,Info#mod.socket_type, Path, Info).
%% The common case when no range is specified
send_response(_Socket, _SocketType, Path, Info)->
%% Send the file!
%% Find the modification date of the file
case file:open(Path,[raw,binary]) of
{ok, FileDescriptor} ->
{FileInfo, LastModified} = get_modification_date(Path),
?DEBUG("do_get -> FileDescriptor: ~p",[FileDescriptor]),
Suffix = httpd_util:suffix(Path),
MimeType = httpd_util:lookup_mime_default(Info#mod.config_db,
Suffix,"text/plain"),
%% FileInfo = file:read_file_info(Path),
Size = integer_to_list(FileInfo#file_info.size),
Headers = case Info#mod.http_version of
"HTTP/1.1" ->
[{content_type, MimeType},
{etag, httpd_util:create_etag(FileInfo)},
{content_length, Size}|LastModified];
%% OTP-4935
_ ->
%% i.e http/1.0 and http/0.9
[{content_type, MimeType},
{content_length, Size}|LastModified]
end,
send(Info, 200, Headers, FileDescriptor),
file:close(FileDescriptor),
{proceed,[{response,{already_sent,200,
FileInfo#file_info.size}},
{mime_type,MimeType}|Info#mod.data]};
{error, Reason} ->
Status = httpd_file:handle_error(Reason, "open", Info, Path),
{proceed,
[{status, Status}| Info#mod.data]}
end.
%% send
send(#mod{socket = Socket, socket_type = SocketType} = Info,
StatusCode, Headers, FileDescriptor) ->
?DEBUG("send -> send header",[]),
httpd_response:send_header(Info, StatusCode, Headers),
send_body(SocketType,Socket,FileDescriptor).
send_body(SocketType,Socket,FileDescriptor) ->
case file:read(FileDescriptor,?FILE_CHUNK_SIZE) of
{ok,Binary} ->
?DEBUG("send_body -> send another chunk: ~p",[size(Binary)]),
case httpd_socket:deliver(SocketType,Socket,Binary) of
socket_closed ->
?LOG("send_body -> socket closed while sending",[]),
socket_close;
_ ->
send_body(SocketType,Socket,FileDescriptor)
end;
eof ->
?DEBUG("send_body -> done with this file",[]),
eof
end.
get_modification_date(Path)->
{ok, FileInfo0} = file:read_file_info(Path),
LastModified =
case catch httpd_util:rfc1123_date(FileInfo0#file_info.mtime) of
Date when is_list(Date) -> [{last_modified, Date}];
_ -> []
end,
{FileInfo0, LastModified}.
