📄 environment.cpp
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// Fig. 16.8: environment.cpp
// Program to display CGI environment variables.
#include <iostream>
using std::cout;
#include <string>
using std::string;
#include <cstdlib>
int main()
{
string environmentVariables[ 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" };
// output header
cout << "Content-type: text/html\n\n";
// output XML declaration and DOCTYPE
cout << "<?xml version = \"1.0\"?>"
<< "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 "
<< "Transitional//EN\" \"http://www.w3.org/TR/xhtml1"
<< "/DTD/xhtml1-transitional.dtd\">";
// output html element and some of its contents
cout << "<html xmlns = \"http://www.w3.org/1999/xhtml\">"
<< "<head><title>Environment Variables</title></head>"
<< "<body>";
// begin outputting table
cout << "<table border = \"0\" cellspacing = \"2\">";
// iterate through environment variables
for ( int i = 0; i < 24; i++ )
cout << "<tr><td>" << environmentVariables[ i ]
<< "</td><td>"
<< getenv( environmentVariables[ i ].data() )
<< "</td></tr>";
cout << "</table></body></html>";
return 0;
} // end main
/**************************************************************************
* (C) Copyright 1992-2003 by Deitel & Associates, Inc. and Prentice *
* Hall. All Rights Reserved. *
* *
* DISCLAIMER: The authors and publisher of this book have used their *
* best efforts in preparing the book. These efforts include the *
* development, research, and testing of the theories and programs *
* to determine their effectiveness. The authors and publisher make *
* no warranty of any kind, expressed or implied, with regard to these *
* programs or to the documentation contained in these books. The authors *
* and publisher shall not be liable in any event for incidental or *
* consequential damages in connection with, or arising out of, the *
* furnishing, performance, or use of these programs. *
*************************************************************************/
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