Url Encode
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Pulse.Base
{
public class HttpUtility
{
public static string UrlEncode(byte[] bytes)
{
if (bytes == null)
{
return null;
}
return Encoding.ASCII.GetString(UrlEncodeToBytes(bytes));
}
public static string UrlEncode(string str)
{
if (str == null)
{
return null;
}
return UrlEncode(str, Encoding.UTF8);
}
public static string UrlEncode(string str, Encoding e)
{
if (str == null)
{
return null;
}
return Encoding.ASCII.GetString(UrlEncodeToBytes(str, e));
}
public static string UrlEncode(byte[] bytes, int offset, int count)
{
if (bytes == null)
{
return null;
}
return Encoding.ASCII.GetString(UrlEncodeToBytes(bytes, offset, count));
}
public static byte[] UrlEncodeToBytes(string str, Encoding e)
{
if (str == null)
{
return null;
}
byte[] bytes = e.GetBytes(str);
return UrlEncodeBytesToBytesInternal(bytes, 0, bytes.Length, false);
}
public static byte[] UrlEncodeToBytes(byte[] bytes)
{
if (bytes == null)
{
return null;
}
return UrlEncodeToBytes(bytes, 0, bytes.Length);
}
public static byte[] UrlEncodeToBytes(byte[] bytes, int offset, int count)
{
if ((bytes == null) && (count == 0))
{
return null;
}
if (bytes == null)
{
throw new ArgumentNullException("bytes");
}
if ((offset < 0) || (offset > bytes.Length))
{
throw new ArgumentOutOfRangeException("offset");
}
if ((count < 0) || ((offset + count) > bytes.Length))
{
throw new ArgumentOutOfRangeException("count");
}
return UrlEncodeBytesToBytesInternal(bytes, offset, count, true);
}
private static byte[] UrlEncodeBytesToBytesInternal(byte[] bytes, int offset, int count, bool alwaysCreateReturnValue)
{
int num = 0;
int num2 = 0;
for (int i = 0; i < count; i++)
{
char ch = (char)bytes[offset + i];
if (ch == ' ')
{
num++;
}
else if (!IsSafe(ch))
{
num2++;
}
}
if ((!alwaysCreateReturnValue && (num == 0)) && (num2 == 0))
{
return bytes;
}
byte[] buffer = new byte[count + (num2 * 2)];
int num4 = 0;
for (int j = 0; j < count; j++)
{
byte num6 = bytes[offset + j];
char ch2 = (char)num6;
if (IsSafe(ch2))
{
buffer[num4++] = num6;
}
else if (ch2 == ' ')
{
buffer[num4++] = 0x2b;
}
else
{
buffer[num4++] = 0x25;
buffer[num4++] = (byte)IntToHex((num6 >> 4) & 15);
buffer[num4++] = (byte)IntToHex(num6 & 15);
}
}
return buffer;
}
internal static bool IsSafe(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 '_':
case '!':
return true;
}
return false;
}
internal static char IntToHex(int n)
{
if (n <= 9)
{
return (char)(n + 0x30);
}
return (char)((n - 10) + 0x61);
}
}
}
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