📄 writecookie.cpp

📁 《c＋＋大学教程》源码
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// Fig. 16.16: writecookie.cpp
// Program to write a cookie to a client's machine.
#include <iostream>

using std::cout;
using std::cin;

#include <cstdlib>
#include <string>

using std::string;

int main()
{
   char query[ 1024 ] = "";
   string dataString = "";
   string nameString = "";
   string ageString = "";
   string colorString = "";
   
   int contentLength = 0;
   
   // expiration date of cookie
   string expires = "Friday, 14-MAY-04 16:00:00 GMT";
   
   // data was entered
   if ( getenv( "CONTENT_LENGTH" ) ) {
      contentLength = atoi( getenv( "CONTENT_LENGTH" ) );

      // read data from standard input
      cin.read( query, contentLength );
      dataString = query;

      // search string for data and store locations
      int nameLocation = dataString.find( "name=" ) + 5;
      int endName = dataString.find( "&" );
      
      int ageLocation = dataString.find( "age=" ) + 4;
      int endAge = dataString.find( "&color" );
      
      int colorLocation = dataString.find( "color=" ) + 6;
      int endColor = dataString.find( "&button" );
      
      // get value for user's name
      nameString = dataString.substr( nameLocation, endName - 
         nameLocation );
      
      // get value for user's age      
      if ( ageLocation > 0 )
         ageString = dataString.substr( ageLocation, endAge - 
            ageLocation );
      
      // get value for user's favorite color
      if ( colorLocation > 0 )
         colorString = dataString.substr( colorLocation, 
            endColor - colorLocation );

      // set cookie
      cout << "Set-cookie: Name=" << nameString << "age:"
           << ageString << "color:" << colorString 
           << "; expires=" << expires << "; path=\n";
   
   } // end if
      
   // 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>Cookie Saved</title></head>"
        << "<body>";
   
   // output user's information
   cout << "<p>The cookies have been set with the following"
        << " data:</p>"
        << "<p>Name: " << nameString  << "<br/></p>"
        << "<p>Age:"   << ageString   << "<br/></p>"
        << "<p>Color:" << colorString << "<br/></p>"
        << "<p>Click <a href=\"/cgi-bin/readcookie.cgi\">"
        << "here</a> to read saved cookie data:</p>"
        << "</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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