📄 getquery.cpp
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// Fig. 19.11: getquery.cpp
// Demonstrates GET method with XHTML form.
#include <iostream>
using std::cout;
#include <string>
using std::string;
#include <cstdlib>
using std::getenv;
int main()
{
string nameString = "";
string wordString = "";
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>Using GET with Forms</title></head><body>";
// output xhtml form
cout << "<p>Enter one of your favorite words here:</p>"
<< "<form method = \"get\" action = \"getquery.cgi\">"
<< "<input type = \"text\" name = \"word\"/>"
<< "<input type = \"submit\" value = \"Submit Word\"/></form>";
if ( query == "" ) // query is empty
cout << "<p>Please enter a word.</p>";
else // user entered query string
{
int wordLocation = query.find_first_of( "word=" ) + 5;
wordString = query.substr( wordLocation );
if ( wordString == "" ) // no word was entered
cout << "<p>Please enter a word.</p>";
else // word was entered
cout << "<p>Your word is: " << wordString << "</p>";
} // end else
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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