43 lines
1,009 B
C#
43 lines
1,009 B
C#
/*
|
|
* Copyright (c) 2019 ETH Zürich, Educational Development and Technology (LET)
|
|
*
|
|
* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
|
|
*/
|
|
|
|
using System;
|
|
using System.Text;
|
|
|
|
namespace SafeExamBrowser.UserInterface.Shared.Utilities
|
|
{
|
|
public static class UrlRandomizer
|
|
{
|
|
private const string DIGITS = "0123456789";
|
|
private const string LETTERS = "abcdefghijklmnopqrstuvwxyz";
|
|
|
|
public static string Randomize(string url)
|
|
{
|
|
var generator = new Random();
|
|
var result = new StringBuilder();
|
|
|
|
foreach (var character in url)
|
|
{
|
|
if (Char.IsDigit(character))
|
|
{
|
|
result.Append(DIGITS[generator.Next(DIGITS.Length)]);
|
|
}
|
|
else if (Char.IsLetter(character))
|
|
{
|
|
result.Append(LETTERS[generator.Next(LETTERS.Length)]);
|
|
}
|
|
else
|
|
{
|
|
result.Append(character);
|
|
}
|
|
}
|
|
|
|
return result.ToString();
|
|
}
|
|
}
|
|
}
|