#include <net_config.h>

U8 http_get_session (void);

The http_get_session returns the current session number of the HTTP server running on TCPnet. The session number can be any value between 0 and HTTP_NUMSESS. You can customize the defined value of HTTP_NUMSESS in net_config.h.

The http_get_session function is a system function that is in the RL-TCPnet library. The prototype is defined in net_config.h.

note

• Storing the HTTP query string in a single global variable can result in the HTTP server sending the wrong reply to a client when several clients try to access a dynamic HTTP page at the same time. Hence it is better to have a separate variable for each session, for example an array of query strings.

The http_get_session function returns the current session number of the HTTP server.

cgi_func

/* Should be the same value as set in 'Net_Config.c' file. */
#define HTTP_NUMSESS 10

U32 answer[HTTP_NUMSESS];

U16 cgi_func (U8 *env, U8 *buf, U16 buflen, U32 *pcgi) {
  U16 len = 0;
  U32 http_session;

   ..
  http_session = http_get_session ();
  len += sprintf (buf+len,"Answer is: %d",answer[http_session]);
   ..
  return (len);
}