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