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%% ``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_get.erl,v 1.1 2008/12/17 09:53:35 mikpe Exp $
-module(mod_get).
-export([do/1]).
-include("httpd.hrl").
%% do
do(Info) ->
?DEBUG("do -> entry",[]),
case Info#mod.method of
"GET" ->
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_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),
{FileInfo, LastModified} =get_modification_date(Path),
send_response(Info#mod.socket,Info#mod.socket_type,Path,Info,FileInfo,LastModified).
%%The common case when no range is specified
send_response(Socket,SocketType,Path,Info,FileInfo,LastModified)->
%% Send the file!
%% Find the modification date of the file
case file:open(Path,[raw,binary]) of
{ok, FileDescriptor} ->
?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),
Date = httpd_util:rfc1123_date(),
Size = integer_to_list(FileInfo#file_info.size),
Header=case Info#mod.http_version of
"HTTP/1.1" ->
[httpd_util:header(200, MimeType, Info#mod.connection),
"Last-Modified: ", LastModified, "\r\n",
"Etag: ",httpd_util:create_etag(FileInfo),"\r\n",
"Content-Length: ",Size,"\r\n\r\n"];
"HTTP/1.0" ->
[httpd_util:header(200, MimeType, Info#mod.connection),
"Last-Modified: ", LastModified, "\r\n",
"Content-Length: ",Size,"\r\n\r\n"]
end,
send(Info#mod.socket_type, Info#mod.socket,
Header, FileDescriptor),
file:close(FileDescriptor),
{proceed,[{response,{already_sent,200,
FileInfo#file_info.size}},
{mime_type,MimeType}|Info#mod.data]};
{error, Reason} ->
{proceed,
[{status,open_error(Reason,Info,Path)}|Info#mod.data]}
end.
%% send
send(SocketType,Socket,Header,FileDescriptor) ->
?DEBUG("send -> send header",[]),
case httpd_socket:deliver(SocketType,Socket,Header) of
socket_closed ->
?LOG("send -> socket closed while sending header",[]),
socket_close;
_ ->
send_body(SocketType,Socket,FileDescriptor)
end.
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.
%% open_error - Handle file open failure
%%
open_error(eacces,Info,Path) ->
open_error(403,Info,Path,"");
open_error(enoent,Info,Path) ->
open_error(404,Info,Path,"");
open_error(enotdir,Info,Path) ->
open_error(404,Info,Path,
": A component of the file name is not a directory");
open_error(emfile,_Info,Path) ->
open_error(500,none,Path,": To many open files");
open_error({enfile,_},_Info,Path) ->
open_error(500,none,Path,": File table overflow");
open_error(_Reason,_Info,Path) ->
open_error(500,none,Path,"").
open_error(StatusCode,none,Path,Reason) ->
{StatusCode,none,?NICE("Can't open "++Path++Reason)};
open_error(StatusCode,Info,Path,Reason) ->
{StatusCode,Info#mod.request_uri,?NICE("Can't open "++Path++Reason)}.
get_modification_date(Path)->
case file:read_file_info(Path) of
{ok, FileInfo0} ->
{FileInfo0, httpd_util:rfc1123_date(FileInfo0#file_info.mtime)};
_ ->
{#file_info{},""}
end.
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