Thread: Request QueryString Value for CGI style app

Hello All,

I'm hoping this is not a stupid question but I am quite new to C, so If it is dumb, please humour me.

I am trying to write a function for use in my CGI style app.

The function is to return the value of the specified item in the QUERY_STRING environment variable. If the item does not exist it returns a blank string "".

This is what I have done but not working how I thought it would.

Code:

#include <stdio.h>
#include <string.h>
#include <ctype.h>
 
int main(){
 printf(QueryString("test"));
}
 
// ---- Return QueryString Value ---- //
QueryString(char *strobj){
 char *qs = getenv("QUERY_STRING");
 char *init_word;
 if (qs){
        if (strstr(qs, strobj)){
   char *word;
   char *strtype = "name";
   char *stropt = "false";
   word = strtok(qs, "&,=");
   while (word){
    if (strcmp(word, strobj)){
     if (strtype == "name"){
      stropt = "true";
     }
     else{
      if (stropt == "true"){
       return word;
       break;
      }
     }
    }
    if (strtype == "name"){
     strtype = "value";
    }
    else{
     strtype = "name";
    }
    word = strtok(NULL, "&,=");
   }
  }
  else{
   return "";
  }
 }
 else{
        return "";
 }
}

Could someone please give me a helping hand.

Also does anyone know of any good C CGI tutorials?

Thanks and any help is much appreciated.

Kind Regards,
Tarran