aboutsummaryrefslogtreecommitdiff
path: root/src/examples/refuse_post_example.c
blob: 9241ce43a49c46c74de9a7f6f4fd912c8ed82ff3 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
/*
     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 refuse_post_example.c
 * @brief example for how to refuse a POST request properly
 * @author Christian Grothoff and Sebastian Gerhardt
 */
#include "platform.h"
#include <microhttpd.h>

const char *askpage =
  "<html><body>\n\
                       Upload a file, please!<br>\n\
                       <form action=\"/filepost\" method=\"post\" enctype=\"multipart/form-data\">\n\
                       <input name=\"file\" type=\"file\">\n\
                       <input type=\"submit\" value=\" Send \"></form>\n\
                       </body></html>";

#define BUSYPAGE \
  "<html><head><title>Webserver busy</title></head><body>We are too busy to process POSTs right now.</body></html>"

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)
{
  static int aptr;
  const char *me = cls;
  struct MHD_Response *response;
  int ret;
  (void) cls;               /* Unused. Silent compiler warning. */
  (void) url;               /* Unused. Silent compiler warning. */
  (void) version;           /* Unused. Silent compiler warning. */
  (void) upload_data;       /* Unused. Silent compiler warning. */
  (void) upload_data_size;  /* Unused. Silent compiler warning. */

  if ((0 != strcmp (method, "GET")) && (0 != strcmp (method, "POST")))
    return MHD_NO;              /* unexpected method */

  if (&aptr != *ptr)
  {
    *ptr = &aptr;

    /* always to busy for POST requests */
    if (0 == strcmp (method, "POST"))
    {
      response = MHD_create_response_from_buffer (strlen (BUSYPAGE),
                                                  (void *) BUSYPAGE,
                                                  MHD_RESPMEM_PERSISTENT);
      ret =
        MHD_queue_response (connection, MHD_HTTP_SERVICE_UNAVAILABLE,
                            response);
      MHD_destroy_response (response);
      return ret;
    }
  }

  *ptr = NULL;                  /* reset when done */
  response = MHD_create_response_from_buffer (strlen (me),
                                              (void *) me,
                                              MHD_RESPMEM_PERSISTENT);
  ret = MHD_queue_response (connection, MHD_HTTP_OK, response);
  MHD_destroy_response (response);
  return ret;
}

int
main (int argc, char *const *argv)
{
  struct MHD_Daemon *d;

  if (argc != 2)
  {
    printf ("%s PORT\n", argv[0]);
    return 1;
  }
  d = MHD_start_daemon (MHD_USE_THREAD_PER_CONNECTION
                        | MHD_USE_INTERNAL_POLLING_THREAD | MHD_USE_ERROR_LOG,
                        atoi (argv[1]),
                        NULL, NULL, &ahc_echo, (void *) askpage,
                        MHD_OPTION_END);
  if (d == NULL)
    return 1;
  (void) getc (stdin);
  MHD_stop_daemon (d);
  return 0;
}

/* end of refuse_post_example.c */