Using POST with Forms

// Fig. 16.12: post.cpp // Demonstrates POST method with XHTML form. #include using std::cout; using std::cin; #include using std::string; #include int main() { char postString[ 1024 ] = ""; // variable to hold query string string dataString = ""; string nameString = ""; string wordString = ""; int contentLength = 0; // content was submitted if ( getenv( "CONTENT_LENGTH" ) ) contentLength = atoi( getenv( "CONTENT_LENGTH" ) ); cin.read( postString, contentLength ); dataString = postString; // output header cout << "Content-type: text/html\n\n"; // output XML declaration and DOCTYPE cout << "" << ""; // output html element and some of its contents cout << "" << "Using POST with Forms" << ""; // output xhtml form cout << "

Enter one of your favorite words here:

" << ""; // data was sent using POST if ( contentLength > 0 ) { int nameLocation = dataString.find_first_of( "word=" ) + 5; int endLocation = dataString.find_first_of( "&" ) - 1; // retrieve entered word wordString = dataString.substr( nameLocation, endLocation - nameLocation ); // no data was entered in text field if ( wordString == "" ) cout << "

Please enter a word.

"; // output word else cout << "

Your word is: " << wordString << "

"; } // end if // no data was sent else cout << "

Please enter a word.

"; cout << ""; 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. * *************************************************************************/