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 querystring_example.c 21 * @brief example for how to get the query string from libmicrohttpd 22 * Call with an URI ending with something like "?q=QUERY" 23 * @author Christian Grothoff 24 */ 25 26 #include "platform.h" 27 #include <microhttpd.h> 28 29 #define PAGE "<html><head><title>libmicrohttpd demo</title></head><body>Query string for "%s" was "%s"</body></html>" 30 31 static int 32 ahc_echo (void *cls, 33 struct MHD_Connection *connection, 34 const char *url, 35 const char *method, 36 const char *version, 37 const char *upload_data, size_t *upload_data_size, void **ptr) 38 { 39 static int aptr; 40 const char *fmt = cls; 41 const char *val; 42 char *me; 43 struct MHD_Response *response; 44 int ret; 45 46 if (0 != strcmp (method, "GET")) 47 return MHD_NO; /* unexpected method */ 48 if (&aptr != *ptr) 49 { 50 /* do never respond on first call */ 51 *ptr = &aptr; 52 return MHD_YES; 53 } 54 *ptr = NULL; /* reset when done */ 55 val = MHD_lookup_connection_value (connection, MHD_GET_ARGUMENT_KIND, "q"); 56 me = malloc (snprintf (NULL, 0, fmt, "q", val) + 1); 57 if (me == NULL) 58 return MHD_NO; 59 sprintf (me, fmt, "q", val); 60 response = MHD_create_response_from_buffer (strlen (me), me, 61 MHD_RESPMEM_MUST_FREE); 62 if (response == NULL) 63 { 64 free (me); 65 return MHD_NO; 66 } 67 ret = MHD_queue_response (connection, MHD_HTTP_OK, response); 68 MHD_destroy_response (response); 69 return ret; 70 } 71 72 int 73 main (int argc, char *const *argv) 74 { 75 struct MHD_Daemon *d; 76 77 if (argc != 2) 78 { 79 printf ("%s PORT\n", argv[0]); 80 return 1; 81 } 82 d = MHD_start_daemon (MHD_USE_THREAD_PER_CONNECTION | MHD_USE_DEBUG, 83 atoi (argv[1]), 84 NULL, NULL, &ahc_echo, PAGE, MHD_OPTION_END); 85 if (d == NULL) 86 return 1; 87 (void) getc (stdin); 88 MHD_stop_daemon (d); 89 return 0; 90 } 91
