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(* Feel free to use this example code in any way
you see fit (Public Domain) *)
// Original example: https://gnunet.org/svn/libmicrohttpd/doc/examples/responseheaders.c
program responseheaders;
{$mode objfpc}{$H+}
uses
BaseUnix, SysUtils, libmicrohttpd;
const
PORT = 8888;
FILENAME = 'picture.png';
MIMETYPE = 'image/png';
function AnswerToConnection(ACls: Pointer; AConnection: PMHD_Connection;
AUrl: Pcchar; AMethod: Pcchar; AVersion: Pcchar; AUploadData: Pcchar;
AUploadDataSize: Psize_t; AConCls: PPointer): cint; cdecl;
const
errorstr: Pcchar = '<html><body>An internal server error has occurred!</body></html>';
var
VFd: cint;
VReturn: cint;
VResponse: PMHD_Response;
VSbuf: TStat;
begin
if StrComp(AMethod, 'GET') <> 0 then
Exit(MHD_NO);
VFd := FpOpen(FILENAME, O_RDONLY);
VSbuf := Default(TStat);
if (VFd = -1) or (FpFStat(VFd, VSbuf) <> 0) then
begin
(* error accessing file *)
if VFd <> -1 then
FpClose(VFd);
VResponse := MHD_create_response_from_buffer(Length(errorstr),
Pointer(errorstr), MHD_RESPMEM_PERSISTENT);
if Assigned(VResponse) then
begin
VReturn := MHD_queue_response(AConnection,
MHD_HTTP_INTERNAL_SERVER_ERROR, VResponse);
MHD_destroy_response(VResponse);
Exit(VReturn);
end
else
Exit(MHD_NO);
end;
VResponse := MHD_create_response_from_fd_at_offset64(VSbuf.st_size, VFd, 0);
MHD_add_response_header(VResponse, 'Content-Type', MIMETYPE);
VReturn := MHD_queue_response(AConnection, MHD_HTTP_OK, VResponse);
MHD_destroy_response(VResponse);
Result := VReturn;
end;
var
VDaemon: PMHD_Daemon;
begin
VDaemon := MHD_start_daemon(MHD_USE_SELECT_INTERNALLY, PORT, nil,
nil, @AnswerToConnection, nil, MHD_OPTION_END);
if not Assigned(VDaemon) then
Halt(1);
ReadLn;
MHD_stop_daemon(VDaemon);
end.
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