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//------------------------------------------------------------------------------
// <copyright file="HttpEncoderUtility.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
/*
* Helper class for common encoding routines
*
* Copyright (c) 2009 Microsoft Corporation
*/
namespace System.Web.Util {
using System;
using System.Web;
internal static class HttpEncoderUtility {
public static int HexToInt(char h) {
return (h >= '0' && h <= '9') ? h - '0' :
(h >= 'a' && h <= 'f') ? h - 'a' + 10 :
(h >= 'A' && h <= 'F') ? h - 'A' + 10 :
-1;
}
public static char IntToHex(int n) {
Debug.Assert(n < 0x10);
if (n <= 9)
return (char)(n + (int)'0');
else
return (char)(n - 10 + (int)'a');
}
// Set of safe chars, from RFC 1738.4 minus '+'
public static bool IsUrlSafeChar(char ch) {
if ((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') || (ch >= '0' && ch <= '9'))
return true;
switch (ch) {
case '-':
case '_':
case '.':
case '!':
case '*':
case '(':
case ')':
return true;
}
return false;
}
// Helper to encode spaces only
internal static String UrlEncodeSpaces(string str) {
if (str != null && str.IndexOf(' ') >= 0)
str = str.Replace(" ", "%20");
return str;
}
}
}
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