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      1 /*
      2      This file is part of libmicrohttpd
      3      Copyright (C) 2015 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 chunked_example.c
     21  * @brief example for generating chunked encoding with libmicrohttpd
     22  * @author Christian Grothoff
     23  */
     24 
     25 #include "platform.h"
     26 #include <microhttpd.h>
     27 
     28 
     29 static ssize_t
     30 callback (void *cls,
     31           uint64_t pos,
     32           char *buf,
     33           size_t max)
     34 {
     35   return MHD_CONTENT_READER_END_OF_STREAM;
     36 }
     37 
     38 
     39 
     40 static int
     41 ahc_echo (void *cls,
     42           struct MHD_Connection *connection,
     43           const char *url,
     44           const char *method,
     45           const char *version,
     46           const char *upload_data, size_t *upload_data_size, void **ptr)
     47 {
     48   static int aptr;
     49   struct MHD_Response *response;
     50   int ret;
     51 
     52   if (0 != strcmp (method, "GET"))
     53     return MHD_NO;              /* unexpected method */
     54   if (&aptr != *ptr)
     55     {
     56       /* do never respond on first call */
     57       *ptr = &aptr;
     58       return MHD_YES;
     59     }
     60   *ptr = NULL;                  /* reset when done */
     61   response = MHD_create_response_from_callback (MHD_SIZE_UNKNOWN,
     62                                                 1024,
     63                                                 &callback,
     64                                                 NULL,
     65                                                 NULL);
     66   ret = MHD_queue_response (connection, MHD_HTTP_OK, response);
     67   MHD_destroy_response (response);
     68   return ret;
     69 }
     70 
     71 int
     72 main (int argc, char *const *argv)
     73 {
     74   struct MHD_Daemon *d;
     75 
     76   if (argc != 2)
     77     {
     78       printf ("%s PORT\n", argv[0]);
     79       return 1;
     80     }
     81   d = MHD_start_daemon (// MHD_USE_SELECT_INTERNALLY | MHD_USE_DEBUG | MHD_USE_POLL,
     82 			MHD_USE_SELECT_INTERNALLY | MHD_USE_DEBUG,
     83 			// MHD_USE_THREAD_PER_CONNECTION | MHD_USE_DEBUG | MHD_USE_POLL,
     84 			// MHD_USE_THREAD_PER_CONNECTION | MHD_USE_DEBUG,
     85                         atoi (argv[1]),
     86                         NULL, NULL, &ahc_echo, NULL,
     87 			MHD_OPTION_CONNECTION_TIMEOUT, (unsigned int) 120,
     88 			MHD_OPTION_END);
     89   if (d == NULL)
     90     return 1;
     91   (void) getc (stdin);
     92   MHD_stop_daemon (d);
     93   return 0;
     94 }
     95