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(*
This file is part of libmicrohttpd
Copyright (C) 2007 Christian Grothoff (and other contributing authors)
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*)
(**
* @file fileserver_example_dirs.pp (Original: fileserver_example_dirs.c)
* @brief example for how to use libmicrohttpd to serve files (with directory support)
* @author Christian Grothoff / Silvio Clécio
*)
program fileserver_example_dirs;
{$mode objfpc}{$H+}
uses
sysutils, BaseUnix, cutils, libmicrohttpd;
const
PAGE: Pcchar = '<html><head><title>File not found</title></head><body>File not found</body></html>';
function file_reader(cls: Pointer; pos: cuint64; buf: Pcchar;
max: size_t): ssize_t; cdecl;
var
&file: FILEptr;
begin
&file := cls;
fseek(&file, pos, SEEK_SET);
Result := fread(buf, 1, max, &file);
end;
procedure file_free_callback(cls: Pointer); cdecl;
var
&file: FILEptr;
begin
&file := cls;
fclose(&file);
end;
procedure dir_free_callback(cls: Pointer); cdecl;
var
dir: pDir;
begin
dir := cls;
if dir <> nil then
FpClosedir(dir^);
end;
function dir_reader(cls: Pointer; pos: cuint64; buf: Pcchar;
max: size_t): ssize_t; cdecl;
var
dir: pDir;
e: pDirent;
begin
dir := cls;
if max < 512 then
Exit(0);
repeat
e := FpReaddir(dir^);
if e = nil then
Exit(MHD_CONTENT_READER_END_OF_STREAM);
until not (e^.d_name[0] = '.');
Result := snprintf(buf, max, '<a href="/%s">%s</a><br>', e^.d_name,
e^.d_name);
end;
function ahc_echo(cls: Pointer; connection: PMHD_Connection; url: Pcchar;
method: Pcchar; version: Pcchar; upload_data: Pcchar;
upload_data_size: Psize_t; ptr: PPointer): cint; cdecl;
const
aptr: cint = 0;
var
response: PMHD_Response;
ret: cint;
&file: FILEptr;
dir: pDir;
buf: stat;
emsg: array[0..1023] of AnsiChar;
begin
if 0 <> strcomp(method, MHD_HTTP_METHOD_GET) then
Exit(MHD_NO); (* unexpected method *)
if @aptr <> ptr^ then
begin
(* do never respond on first call *)
ptr^ := @aptr;
Exit(MHD_YES);
end;
ptr^ := nil; (* reset when done *)
if (0 = FpStat(@url[1], buf)) and fpS_ISREG(buf.st_mode) then
&file := fopen(@url[1], fopenread)
else
&file := nil;
if &file = nil then
begin
dir := FpOpendir(PChar('.'));
if dir = nil then
begin
(* most likely cause: more concurrent requests than
available file descriptors / 2 *)
snprintf(emsg, SizeOf(emsg), 'Failed to open directory `.'': %s'#10,
strerror(errno^));
response := MHD_create_response_from_buffer(strlen(emsg), @emsg,
MHD_RESPMEM_MUST_COPY);
if response = nil then
Exit(MHD_NO);
ret := MHD_queue_response(connection, MHD_HTTP_SERVICE_UNAVAILABLE,
response);
MHD_destroy_response(response);
end
else
begin
response := MHD_create_response_from_callback(cuint64(MHD_SIZE_UNKNOWN),
32 * 1024, @dir_reader, dir, @dir_free_callback);
if response = nil then
begin
FpClosedir(dir^);
Exit(MHD_NO);
end;
ret := MHD_queue_response(connection, MHD_HTTP_OK, response);
MHD_destroy_response(response);
end;
end
else
begin
response := MHD_create_response_from_callback(buf.st_size, 32 * 1024, (* 32k page size *)
@file_reader, &file, @file_free_callback);
if response = nil then
begin
fclose(&file);
Exit(MHD_NO);
end;
ret := MHD_queue_response(connection, MHD_HTTP_OK, response);
MHD_destroy_response(response);
end;
Result := ret;
end;
var
d: PMHD_Daemon;
begin
if argc <> 2 then
begin
WriteLn(argv[0], ' PORT');
Halt(1);
end;
d := MHD_start_daemon(MHD_USE_THREAD_PER_CONNECTION or MHD_USE_DEBUG,
StrToInt(argv[1]), nil, nil, @ahc_echo, PAGE, MHD_OPTION_END);
if d = nil then
Halt(1);
ReadLn;
MHD_stop_daemon(d);
end.
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