1 /*
2 This file is part of libmicrohttpd
3 Copyright (C) 2007, 2008 Christian Grothoff (and other contributing authors)
4
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with this library; if not, write to the Free Software
17 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 */
19 /**
20 * @file minimal_example.c
21 * @brief minimal example for how to generate an infinite stream with libmicrohttpd
22 * @author Christian Grothoff
23 */
24
25 #include "platform.h"
26 #include <microhttpd.h>
27
28 static ssize_t
data_generator(void * cls,uint64_t pos,char * buf,size_t max)29 data_generator (void *cls, uint64_t pos, char *buf, size_t max)
30 {
31 if (max < 80)
32 return 0;
33 memset (buf, 'A', max - 1);
34 buf[79] = '\n';
35 return 80;
36 }
37
38 static int
ahc_echo(void * cls,struct MHD_Connection * connection,const char * url,const char * method,const char * version,const char * upload_data,size_t * upload_data_size,void ** ptr)39 ahc_echo (void *cls,
40 struct MHD_Connection *connection,
41 const char *url,
42 const char *method,
43 const char *version,
44 const char *upload_data, size_t *upload_data_size, void **ptr)
45 {
46 static int aptr;
47 struct MHD_Response *response;
48 int ret;
49
50 if (0 != strcmp (method, "GET"))
51 return MHD_NO; /* unexpected method */
52 if (&aptr != *ptr)
53 {
54 /* do never respond on first call */
55 *ptr = &aptr;
56 return MHD_YES;
57 }
58 *ptr = NULL; /* reset when done */
59 response = MHD_create_response_from_callback (MHD_SIZE_UNKNOWN,
60 80,
61 &data_generator, NULL, NULL);
62 ret = MHD_queue_response (connection, MHD_HTTP_OK, response);
63 MHD_destroy_response (response);
64 return ret;
65 }
66
67 int
main(int argc,char * const * argv)68 main (int argc, char *const *argv)
69 {
70 struct MHD_Daemon *d;
71
72 if (argc != 2)
73 {
74 printf ("%s PORT\n", argv[0]);
75 return 1;
76 }
77 d = MHD_start_daemon (MHD_USE_THREAD_PER_CONNECTION | MHD_USE_DEBUG,
78 atoi (argv[1]),
79 NULL, NULL, &ahc_echo, NULL, MHD_OPTION_END);
80 if (d == NULL)
81 return 1;
82 (void) getc (stdin);
83 MHD_stop_daemon (d);
84 return 0;
85 }
86