HttpEncoderUtility.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / xsp / System / Web / Util / HttpEncoderUtility.cs / 1305376 / HttpEncoderUtility.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

/* 
 * 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;
        } 

    } 
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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