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(* This file is part of libmicrohttpd Copyright (C) 2007, 2008 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_external_select.pp (Original: fileserver_example_external_select.c) * @brief minimal example for how to use libmicrohttpd to server files * @author Christian Grothoff / Silvio Clécio *) program fileserver_example_external_select; {$mode objfpc}{$H+} uses sysutils, BaseUnix, cutils, libmicrohttpd; const PAGE: Pcchar = 'File not foundFile not found'; 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 free_callback(cls: Pointer); cdecl; var &file: FILEptr; begin &file := cls; fclose(&file); 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; buf: stat; 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 response := MHD_create_response_from_buffer(strlen(PAGE), Pointer(PAGE), MHD_RESPMEM_PERSISTENT); ret := MHD_queue_response(connection, MHD_HTTP_NOT_FOUND, response); MHD_destroy_response(response); end else begin response := MHD_create_response_from_callback(buf.st_size, 32 * 1024, (* 32k page size *) @file_reader, &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; &end: time_t; t: time_t; tv: timeval; rs: TFDSet; ws: TFDSet; es: TFDSet; max: MHD_socket; mhd_timeout: MHD_UNSIGNED_LONG_LONG; begin if argc <> 3 then begin WriteLn(argv[0], ' PORT SECONDS-TO-RUN'); Halt(1); end; d := MHD_start_daemon(MHD_USE_DEBUG, StrToInt(argv[1]), nil, nil, @ahc_echo, PAGE, MHD_OPTION_END); if d = nil then Halt(1); &end := fptime + StrToInt(argv[2]); while True do begin t := fptime; if not (t < &end) then Break; tv.tv_sec := &end - t; tv.tv_usec := 0; max := 0; fpFD_ZERO(rs); fpFD_ZERO(ws); fpFD_ZERO(es); if MHD_YES <> MHD_get_fdset (d, @rs, @ws, @es, @max) then Break; (* fatal internal error *) if MHD_get_timeout(d, @mhd_timeout) = MHD_YES then begin if MHD_UNSIGNED_LONG_LONG(tv.tv_sec) < mhd_timeout div clonglong(1000) then begin tv.tv_sec := mhd_timeout div clonglong(1000); tv.tv_usec := (mhd_timeout - (tv.tv_sec * clonglong(1000))) * clonglong(1000); end; end; fpSelect(max + 1, @rs, @ws, @es, @tv); MHD_run(d); end; MHD_stop_daemon(d); end.