Program CGI pentru a lista toate variabilele CGI

Configurare noua (How To)

Situatie

Solutie

#include <iostream>
#include <stdlib.h>
using namespace std;

const string ENV[ 24 ] = {
   "COMSPEC", "DOCUMENT_ROOT", "GATEWAY_INTERFACE",   
   "HTTP_ACCEPT", "HTTP_ACCEPT_ENCODING",             
   "HTTP_ACCEPT_LANGUAGE", "HTTP_CONNECTION",         
   "HTTP_HOST", "HTTP_USER_AGENT", "PATH",            
   "QUERY_STRING", "REMOTE_ADDR", "REMOTE_PORT",      
   "REQUEST_METHOD", "REQUEST_URI", "SCRIPT_FILENAME",
   "SCRIPT_NAME", "SERVER_ADDR", "SERVER_ADMIN",      
   "SERVER_NAME","SERVER_PORT","SERVER_PROTOCOL",     
   "SERVER_SIGNATURE","SERVER_SOFTWARE" };   

int main () {
   cout << "Content-type:text/htmlrnrn";
   cout << "<html>n";
   cout << "<head>n";
   cout << "<title>CGI Environment Variables</title>n";
   cout << "</head>n";
   cout << "<body>n";
   cout << "<table border = "0" cellspacing = "2">";

   for ( int i = 0; i < 24; i++ ) {
      cout << "<tr><td>" << ENV[ i ] << "</td><td>";
      
      // attempt to retrieve value of environment variable
      char *value = getenv( ENV[ i ].c_str() );  
      if ( value != 0 ) {
         cout << value;                                 
      } else {
         cout << "Environment variable does not exist.";
      }
      cout << "</td></tr>n";
   }
   
   cout << "</table><n";
   cout << "</body>n";
   cout << "</html>n";
   
   return 0;
}

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