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  1.   87598896ac8d29c19650bd12cbba2ccb93c9d95b
  2.   doc
  3.   examples
  4.   simplepost.c
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/* Feel free to use this example code in any way
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   you see fit (Public Domain) */
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#include <sys/types.h>
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#ifndef _WIN32
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#include <sys/select.h>
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#include <sys/socket.h>
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#else
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#include <winsock2.h>
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#endif
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#include <microhttpd.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#if defined(_MSC_VER) && _MSC_VER+0 <= 1800
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/* Substitution is OK while return value is not used */
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#define snprintf _snprintf
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#endif
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#define PORT            8888
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#define POSTBUFFERSIZE  512
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#define MAXNAMESIZE     20
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#define MAXANSWERSIZE   512
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#define GET             0
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#define POST            1
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struct connection_info_struct
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{
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  int connectiontype;
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  char *answerstring;
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  struct MHD_PostProcessor *postprocessor;
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};
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const char *askpage = "<html><body>\
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                       What's your name, Sir?
\
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                       <form action=\"/namepost\" method=\"post\">\
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                       <input name=\"name\" type=\"text\">\
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                       <input type=\"submit\" value=\" Send \"></form>\
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                       </body></html>";
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const char *greetingpage =
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  "<html><body>
Welcome, %s!</center>
</body></html>";
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const char *errorpage =
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  "<html><body>This doesn't seem to be right.</body></html>";
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static int
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send_page (struct MHD_Connection *connection, const char *page)
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{
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  int ret;
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  struct MHD_Response *response;
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  response =
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    MHD_create_response_from_buffer (strlen (page), (void *) page,
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				     MHD_RESPMEM_PERSISTENT);
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  if (!response)
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    return MHD_NO;
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  ret = MHD_queue_response (connection, MHD_HTTP_OK, response);
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  MHD_destroy_response (response);
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  return ret;
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}
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static int
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iterate_post (void *coninfo_cls, enum MHD_ValueKind kind, const char *key,
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              const char *filename, const char *content_type,
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              const char *transfer_encoding, const char *data, uint64_t off,
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              size_t size)
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{
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  struct connection_info_struct *con_info = coninfo_cls;
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  (void)kind;               /* Unused. Silent compiler warning. */
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  (void)filename;           /* Unused. Silent compiler warning. */
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  (void)content_type;       /* Unused. Silent compiler warning. */
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  (void)transfer_encoding;  /* Unused. Silent compiler warning. */
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  (void)off;                /* Unused. Silent compiler warning. */
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  if (0 == strcmp (key, "name"))
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    {
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      if ((size > 0) && (size <= MAXNAMESIZE))
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        {
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          char *answerstring;
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          answerstring = malloc (MAXANSWERSIZE);
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          if (!answerstring)
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            return MHD_NO;
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          snprintf (answerstring, MAXANSWERSIZE, greetingpage, data);
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          con_info->answerstring = answerstring;
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        }
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      else
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        con_info->answerstring = NULL;
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      return MHD_NO;
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    }
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  return MHD_YES;
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}
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static void
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request_completed (void *cls, struct MHD_Connection *connection,
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                   void **con_cls, enum MHD_RequestTerminationCode toe)
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{
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  struct connection_info_struct *con_info = *con_cls;
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  (void)cls;         /* Unused. Silent compiler warning. */
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  (void)connection;  /* Unused. Silent compiler warning. */
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  (void)toe;         /* Unused. Silent compiler warning. */
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  if (NULL == con_info)
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    return;
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  if (con_info->connectiontype == POST)
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    {
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      MHD_destroy_post_processor (con_info->postprocessor);
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      if (con_info->answerstring)
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        free (con_info->answerstring);
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    }
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  free (con_info);
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  *con_cls = NULL;
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}
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static int
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answer_to_connection (void *cls, struct MHD_Connection *connection,
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                      const char *url, const char *method,
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                      const char *version, const char *upload_data,
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                      size_t *upload_data_size, void **con_cls)
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{
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  (void)cls;               /* Unused. Silent compiler warning. */
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  (void)url;               /* Unused. Silent compiler warning. */
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  (void)version;           /* Unused. Silent compiler warning. */
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  if (NULL == *con_cls)
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    {
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      struct connection_info_struct *con_info;
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      con_info = malloc (sizeof (struct connection_info_struct));
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      if (NULL == con_info)
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        return MHD_NO;
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      con_info->answerstring = NULL;
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      if (0 == strcmp (method, "POST"))
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        {
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          con_info->postprocessor =
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            MHD_create_post_processor (connection, POSTBUFFERSIZE,
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                                       iterate_post, (void *) con_info);
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          if (NULL == con_info->postprocessor)
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            {
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              free (con_info);
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              return MHD_NO;
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            }
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          con_info->connectiontype = POST;
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        }
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      else
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        con_info->connectiontype = GET;
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      *con_cls = (void *) con_info;
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      return MHD_YES;
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    }
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  if (0 == strcmp (method, "GET"))
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    {
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      return send_page (connection, askpage);
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    }
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  if (0 == strcmp (method, "POST"))
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    {
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      struct connection_info_struct *con_info = *con_cls;
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      if (*upload_data_size != 0)
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        {
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          MHD_post_process (con_info->postprocessor, upload_data,
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                            *upload_data_size);
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          *upload_data_size = 0;
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          return MHD_YES;
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        }
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      else if (NULL != con_info->answerstring)
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        return send_page (connection, con_info->answerstring);
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    }
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  return send_page (connection, errorpage);
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}
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int
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main ()
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{
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  struct MHD_Daemon *daemon;
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  daemon = MHD_start_daemon (MHD_USE_AUTO | MHD_USE_INTERNAL_POLLING_THREAD, PORT, NULL, NULL,
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                             &answer_to_connection, NULL,
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                             MHD_OPTION_NOTIFY_COMPLETED, request_completed,
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                             NULL, MHD_OPTION_END);
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  if (NULL == daemon)
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    return 1;
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  (void) getchar ();
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  MHD_stop_daemon (daemon);
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  return 0;
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}

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