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 refuse_post_example.c
21 * @brief example for how to refuse a POST request properly
22 * @author Christian Grothoff and Sebastian Gerhardt
23 */
24 #include "platform.h"
25 #include <microhttpd.h>
26
27 const char *askpage = "<html><body>\n\
28 Upload a file, please!<br>\n\
29 <form action=\"/filepost\" method=\"post\" enctype=\"multipart/form-data\">\n\
30 <input name=\"file\" type=\"file\">\n\
31 <input type=\"submit\" value=\" Send \"></form>\n\
32 </body></html>";
33
34 #define BUSYPAGE "<html><head><title>Webserver busy</title></head><body>We are too busy to process POSTs right now.</body></html>"
35
36 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)37 ahc_echo (void *cls,
38 struct MHD_Connection *connection,
39 const char *url,
40 const char *method,
41 const char *version,
42 const char *upload_data, size_t *upload_data_size, void **ptr)
43 {
44 static int aptr;
45 const char *me = cls;
46 struct MHD_Response *response;
47 int ret;
48
49 if ((0 != strcmp (method, "GET")) && (0 != strcmp (method, "POST")))
50 return MHD_NO; /* unexpected method */
51
52 if (&aptr != *ptr)
53 {
54 *ptr = &aptr;
55
56 /* always to busy for POST requests */
57 if (0 == strcmp (method, "POST"))
58 {
59 response = MHD_create_response_from_buffer (strlen (BUSYPAGE),
60 (void *) BUSYPAGE,
61 MHD_RESPMEM_PERSISTENT);
62 ret =
63 MHD_queue_response (connection, MHD_HTTP_SERVICE_UNAVAILABLE,
64 response);
65 MHD_destroy_response (response);
66 return ret;
67 }
68 }
69
70 *ptr = NULL; /* reset when done */
71 response = MHD_create_response_from_buffer (strlen (me),
72 (void *) me,
73 MHD_RESPMEM_PERSISTENT);
74 ret = MHD_queue_response (connection, MHD_HTTP_OK, response);
75 MHD_destroy_response (response);
76 return ret;
77 }
78
79 int
main(int argc,char * const * argv)80 main (int argc, char *const *argv)
81 {
82 struct MHD_Daemon *d;
83
84 if (argc != 2)
85 {
86 printf ("%s PORT\n", argv[0]);
87 return 1;
88 }
89 d = MHD_start_daemon (MHD_USE_THREAD_PER_CONNECTION | MHD_USE_DEBUG,
90 atoi (argv[1]),
91 NULL, NULL, &ahc_echo, (void *) askpage,
92 MHD_OPTION_END);
93 if (d == NULL)
94 return 1;
95 (void) getc (stdin);
96 MHD_stop_daemon (d);
97 return 0;
98 }
99
100 /* end of refuse_post_example.c */
101