cgi_process_var

#include <net_config.h>

void cgi_process_var (
    U8* qs );    /* Pointer to QUERY_STRING returned from the GET method. */

The cgi_process_var function processes the environmental variable QUERY_STRING that is returned from the CGI form GET method. The HTTP server calls this function when a user presses the SUBMIT button on the input form, using a web browser.

The argument qs points to the QUERY_STRING that is returned from the GET method.

The cgi_process_var function is part of RL-TCPnet. The prototype is defined in net_config.h. You can customize the function in http_cgi.c.

note

• The querry string qs is terminated by the space character.
• The HTTP server calls the cgi_process_var function only if the input form, in HTML source, is created with attribute METHOD=GET. For example:

  <FORM ACTION=index.htm METHOD=GET NAME=CGI>
   .
   .
  </FORM>
  

void cgi_process_var (U8 *qs) {
   U8 var[40];

   do {
      /* Loop through all the parameters. */
      qs = http_get_var (qs, var, 40);
      /* Check the returned string, 'qs' now points to the next. */
      if (var[0] != 0) {
         /* Returned string is non 0-length. */
         if (str_scomp (var, "ip=") == __TRUE) {
            /* My IP address parameter. */
            sscanf (&var[3], "%bd.%bd.%bd.%bd",&LocM.IpAdr[0],&LocM.IpAdr[1],
                                               &LocM.IpAdr[2],&LocM.IpAdr[3]);
         }
         else if (str_Scomp (var, "msk=") == __TRUE) {
            /* Net mask parameter. */
            sscanf (&var[4], "%bd.%bd.%bd.%bd",&LocM.NetMask[0],&LocM.NetMask[1],
                                               &LocM.NetMask[2],&LocM.NetMask[3]);
         }
         else if (str_scomp (var, "gw=") == __TRUE) {
          .
          .
         }
      }
   }while (qs);
}