(*
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 querystring_example.pp (Original: querystring_example.c)
* @brief example for how to get the query string from libmicrohttpd
* Call with an URI ending with something like "?q=QUERY"
* @author Christian Grothoff / Silvio Clécio
*)
program querystring_example;
{$mode objfpc}{$H+}
uses
sysutils, cmem, ctypes, cutils, libmicrohttpd;
const
PAGE: Pcchar = '<html><head><title>libmicrohttpd demo</title></head><body>Query string for "%s" was "%s"</body></html>';
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
fmt: Pcchar;
val: Pcchar;
me: Pcchar;
response: PMHD_Response;
ret: cint;
begin
fmt := cls;
if 0 <> strcomp(method, 'GET') then
Exit(MHD_NO);
if @aptr <> ptr^ then
begin
ptr^ := @aptr;
Exit(MHD_YES);
end;
ptr^ := nil;
val := MHD_lookup_connection_value(connection, MHD_GET_ARGUMENT_KIND, 'q');
me := Malloc(snprintf(nil, 0, fmt, Pcchar('q'), val) + 1);
if me = nil then
Exit(MHD_NO);
sprintf(me, fmt, Pcchar('q'), val);
response := MHD_create_response_from_buffer(strlen(me), Pointer(me),
MHD_RESPMEM_MUST_FREE);
if response = nil then
begin
Free(me);
Exit(MHD_NO);
end;
ret := MHD_queue_response(connection, MHD_HTTP_OK, response);
MHD_destroy_response(response);
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.
