A practical example sanitizing user input by removing script tags and normalizing excess whitespace in a single pass.

ID: 1145

See: Transform(string) 
				
					using uCalcSoftware;

var uc = new uCalc();
using (var t = new uCalc.Transformer()) {
   // Rule 1: Remove script tags and their content (case-insensitive, multi-line)
   t.FromTo("<script>{content}</script>", "");
   t.DefaultRuleSet.SetCaseSensitive(false).SetStatementSensitive(false);

   // Rule 2: Normalize one or more whitespace characters to a single space
   t.FromTo("{@Whitespace:ws}", " ");

   string userInput = "  Welcome!  <SCRIPT>alert('bad');</SCRIPT>Please enjoy.  ";

   // Transform the input in one go and print the result
   Console.WriteLine($"Sanitized: '{t.Transform(userInput)}'");
}
				
			
Sanitized: ' Welcome! Please enjoy. '
Explore 600+ other examples
				
					#include <iostream>
#include "uCalc.h"

using namespace std;
using namespace uCalcSoftware;

int main() {
   uCalc uc;
   {
      uCalc::Transformer t;
      t.Owned(); // Causes t to be released when it goes out of scope
      // Rule 1: Remove script tags and their content (case-insensitive, multi-line)
      t.FromTo("<script>{content}</script>", "");
      t.DefaultRuleSet().SetCaseSensitive(false).SetStatementSensitive(false);

      // Rule 2: Normalize one or more whitespace characters to a single space
      t.FromTo("{@Whitespace:ws}", " ");

      string userInput = "  Welcome!  <SCRIPT>alert('bad');</SCRIPT>Please enjoy.  ";

      // Transform the input in one go and print the result
      cout << "Sanitized: '" << t.Transform(userInput) << "'" << endl;
   }
}
				
			
Sanitized: ' Welcome! Please enjoy. '
Explore 600+ other examples
				
					Imports System
Imports uCalcSoftware
Public Module Program
   Public Sub Main()
      Dim uc As New uCalc()
      Using t As New uCalc.Transformer()
         '// Rule 1: Remove script tags and their content (case-insensitive, multi-line)
         t.FromTo("<script>{content}</script>", "")
         t.DefaultRuleSet.SetCaseSensitive(false).SetStatementSensitive(false)
         
         '// Rule 2: Normalize one or more whitespace characters to a single space
         t.FromTo("{@Whitespace:ws}", " ")
         
         Dim userInput As String = "  Welcome!  <SCRIPT>alert('bad');</SCRIPT>Please enjoy.  "
         
         '// Transform the input in one go and print the result
         Console.WriteLine($"Sanitized: '{t.Transform(userInput)}'")
      End Using
   End Sub
End Module
				
			
Sanitized: ' Welcome! Please enjoy. '
Explore 600+ other examples