?? querystring.cpp
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// Fig. 19.9: querystring.cpp
// Demonstrating QUERY_STRING.
#include <iostream>
using std::cout;
#include <string>
using std::string;
#include <cstdlib>
using::getenv;
int main()
{
string query = "";
if ( getenv( "QUERY_STRING" ) ) // QUERY_STRING variable exists
query = getenv( "QUERY_STRING" ); // retrieve QUERY_STRING value
cout << "Content-Type: text/html\n\n"; // output http header
// output XML declaration and DOCTYPE
cout << "<?xml version = \"1.0\"?>"
<< "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.1//EN\" "
<< "\"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd\">";
// output html element and some of its contents
cout << "<html xmlns = \"http://www.w3.org/1999/xhtml\">"
<< "<head><title>Name/Value Pairs</title></head><body>";
cout << "<h2>Name/Value Pairs</h2>";
// if query contained no data
if ( query == "" )
cout << "Please add some name-value pairs to the URL above.<br/> Or"
<< " try <a href=\"querystring.cgi?name=Joe&age=29\">this</a>.";
else // user entered query string
cout << "<p>The query string is: " << query << "</p>";
cout << "</body></html>";
return 0;
} // end main
/**************************************************************************
* (C) Copyright 1992-2005 by Deitel & Associates, Inc. and *
* Pearson Education, Inc. 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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