📄 post.cpp
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// Fig. 19.12: post.cpp
// Demonstrates POST method with XHTML form.
#include <iostream>
using std::cout;
using std::cin;
#include <string>
using std::string;
#include <cstdlib>
using std::getenv;
using std::atoi;
int main()
{
char postString[ 1024 ] = ""; // variable to hold POST data
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;
} // end if
cout << "Content-Type: text/html\n\n"; // output 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 XHTML element and some of its contents
cout << "<html xmlns = \"http://www.w3.org/1999/xhtml\">"
<< "<head><title>Using POST with Forms</title></head><body>";
// output XHTML form
cout << "<p>Enter one of your favorite words here:</p>"
<< "<form method = \"post\" action = \"post.cgi\">"
<< "<input type = \"text\" name = \"word\" />"
<< "<input type = \"submit\" value = \"Submit Word\" /></form>";
// 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 );
if ( wordString == "" ) // no data was entered in text field
cout << "<p>Please enter a word.</p>";
else // output word
cout << "<p>Your word is: " << wordString << "</p>";
} // end if
else // no data was sent
cout << "<p>Please enter a word.</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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