/// <summary>
/// Url解码
/// </summary>
/// <param name="bytes">字节组</param>
/// <param name="offset">偏移量</param>
/// <param name="count">数量</param>
/// <param name="encoding">编码</param>
/// <returns></returns>
public static string UrlDecode(byte[] bytes, int offset, int count, Encoding encoding)
{
UrlDecoder helper = new UrlDecoder(count, encoding);
// go through the bytes collapsing %XX and %uXXXX and appending
// each byte as byte, with exception of %uXXXX constructs that
// are appended as chars
for (int i = 0; i < count; i++)
{
int pos = offset + i;
byte b = bytes[pos];
// The code assumes that + and % cannot be in multibyte sequence
if (b == '+')
{
b = (byte)' ';
}
else if (b == '%' && i < count - 2)
{
if (bytes[pos + 1] == 'u' && i < count - 5)
{
int h1 = HttpUtility.HexToInt((char)bytes[pos + 2]);
int h2 = HttpUtility.HexToInt((char)bytes[pos + 3]);
int h3 = HttpUtility.HexToInt((char)bytes[pos + 4]);
int h4 = HttpUtility.HexToInt((char)bytes[pos + 5]);
if (h1 >= 0 && h2 >= 0 && h3 >= 0 && h4 >= 0)
{ // valid 4 hex chars
char ch = (char)((h1 << 12) | (h2 << 8) | (h3 << 4) | h4);
i += 5;
// don't add as byte
helper.AddChar(ch);
continue;
}
}
else
{
int h1 = HttpUtility.HexToInt((char)bytes[pos + 1]);
int h2 = HttpUtility.HexToInt((char)bytes[pos + 2]);
if (h1 >= 0 && h2 >= 0)
{ // valid 2 hex chars
b = (byte)((h1 << 4) | h2);
i += 2;
}
}
}
helper.AddByte(b);
}
return(helper.ToString());
}
/// <summary>
/// Url解码
/// </summary>
/// <param name="str">字符串</param>
/// <param name="encoding">编码</param>
/// <returns></returns>
public static string UrlDecode(string str, Encoding encoding)
{
if (str == null)
{
return(null);
}
int count = str.Length;
UrlDecoder helper = new UrlDecoder(count, encoding);
// go through the string's chars collapsing %XX and %uXXXX and
// appending each char as char, with exception of %XX constructs
// that are appended as bytes
for (int pos = 0; pos < count; pos++)
{
char ch = str[pos];
if (ch == '+')
{
ch = ' ';
}
else if (ch == '%' && pos < count - 2)
{
if (str[pos + 1] == 'u' && pos < count - 5)
{
int h1 = HttpUtility.HexToInt(str[pos + 2]);
int h2 = HttpUtility.HexToInt(str[pos + 3]);
int h3 = HttpUtility.HexToInt(str[pos + 4]);
int h4 = HttpUtility.HexToInt(str[pos + 5]);
if (h1 >= 0 && h2 >= 0 && h3 >= 0 && h4 >= 0)
{ // valid 4 hex chars
ch = (char)((h1 << 12) | (h2 << 8) | (h3 << 4) | h4);
pos += 5;
// only add as char
helper.AddChar(ch);
continue;
}
}
else
{
int h1 = HttpUtility.HexToInt(str[pos + 1]);
int h2 = HttpUtility.HexToInt(str[pos + 2]);
if (h1 >= 0 && h2 >= 0)
{ // valid 2 hex chars
byte b = (byte)((h1 << 4) | h2);
pos += 2;
// don't add as char
helper.AddByte(b);
continue;
}
}
}
if ((ch & 0xFF80) == 0)
{
helper.AddByte((byte)ch); // 7 bit have to go as bytes because of Unicode
}
else
{
helper.AddChar(ch);
}
}
return(helper.ToString());
}
/// <summary>
/// Url解码
/// </summary>
/// <param name="bytes">字节组</param>
/// <param name="offset">偏移量</param>
/// <param name="count">数量</param>
/// <param name="encoding">编码</param>
/// <returns></returns>
public static string UrlDecode(byte[] bytes, int offset, int count, Encoding encoding)
{
UrlDecoder helper = new UrlDecoder(count, encoding);
// go through the bytes collapsing %XX and %uXXXX and appending
// each byte as byte, with exception of %uXXXX constructs that
// are appended as chars
for (int i = 0; i < count; i++)
{
int pos = offset + i;
byte b = bytes[pos];
// The code assumes that + and % cannot be in multibyte sequence
if (b == '+')
{
b = (byte)' ';
}
else if (b == '%' && i < count - 2)
{
if (bytes[pos + 1] == 'u' && i < count - 5)
{
int h1 = HttpUtility.HexToInt((char)bytes[pos + 2]);
int h2 = HttpUtility.HexToInt((char)bytes[pos + 3]);
int h3 = HttpUtility.HexToInt((char)bytes[pos + 4]);
int h4 = HttpUtility.HexToInt((char)bytes[pos + 5]);
if (h1 >= 0 && h2 >= 0 && h3 >= 0 && h4 >= 0)
{ // valid 4 hex chars
char ch = (char)((h1 << 12) | (h2 << 8) | (h3 << 4) | h4);
i += 5;
// don't add as byte
helper.AddChar(ch);
continue;
}
}
else
{
int h1 = HttpUtility.HexToInt((char)bytes[pos + 1]);
int h2 = HttpUtility.HexToInt((char)bytes[pos + 2]);
if (h1 >= 0 && h2 >= 0)
{ // valid 2 hex chars
b = (byte)((h1 << 4) | h2);
i += 2;
}
}
}
helper.AddByte(b);
}
return helper.ToString();
}
/// <summary>
/// Url解码
/// </summary>
/// <param name="str">字符串</param>
/// <param name="encoding">编码</param>
/// <returns></returns>
public static string UrlDecode(string str, Encoding encoding)
{
if (str == null)
{
return null;
}
int count = str.Length;
UrlDecoder helper = new UrlDecoder(count, encoding);
// go through the string's chars collapsing %XX and %uXXXX and
// appending each char as char, with exception of %XX constructs
// that are appended as bytes
for (int pos = 0; pos < count; pos++)
{
char ch = str[pos];
if (ch == '+')
{
ch = ' ';
}
else if (ch == '%' && pos < count - 2)
{
if (str[pos + 1] == 'u' && pos < count - 5)
{
int h1 = HttpUtility.HexToInt(str[pos + 2]);
int h2 = HttpUtility.HexToInt(str[pos + 3]);
int h3 = HttpUtility.HexToInt(str[pos + 4]);
int h4 = HttpUtility.HexToInt(str[pos + 5]);
if (h1 >= 0 && h2 >= 0 && h3 >= 0 && h4 >= 0)
{ // valid 4 hex chars
ch = (char)((h1 << 12) | (h2 << 8) | (h3 << 4) | h4);
pos += 5;
// only add as char
helper.AddChar(ch);
continue;
}
}
else
{
int h1 = HttpUtility.HexToInt(str[pos + 1]);
int h2 = HttpUtility.HexToInt(str[pos + 2]);
if (h1 >= 0 && h2 >= 0)
{ // valid 2 hex chars
byte b = (byte)((h1 << 4) | h2);
pos += 2;
// don't add as char
helper.AddByte(b);
continue;
}
}
}
if ((ch & 0xFF80) == 0)
helper.AddByte((byte)ch); // 7 bit have to go as bytes because of Unicode
else
helper.AddChar(ch);
}
return helper.ToString();
}
/// <summary>
/// Url解码
/// </summary>
/// <param name="str">字符串</param>
/// <param name="encoding">编码</param>
/// <returns></returns>
private static string UrlDecode(string str, Encoding encoding)
{
if (str == null)
{
return(null);
}
var count = str.Length;
var helper = new UrlDecoder(count, encoding);
for (var pos = 0; pos < count; pos++)
{
var ch = str[pos];
if (ch == '+')
{
ch = ' ';
}
else if (ch == '%' && pos < count - 2)
{
if (str[pos + 1] == 'u' && pos < count - 5)
{
var h1 = HexToInt(str[pos + 2]);
var h2 = HexToInt(str[pos + 3]);
var h3 = HexToInt(str[pos + 4]);
var h4 = HexToInt(str[pos + 5]);
if (h1 >= 0 && h2 >= 0 && h3 >= 0 && h4 >= 0)
{ // valid 4 hex chars
ch = (char)((h1 << 12) | (h2 << 8) | (h3 << 4) | h4);
pos += 5;
// only add as char
helper.AddChar(ch);
continue;
}
}
else
{
var h1 = HexToInt(str[pos + 1]);
var h2 = HexToInt(str[pos + 2]);
if (h1 >= 0 && h2 >= 0)
{ // valid 2 hex chars
var b = (byte)((h1 << 4) | h2);
pos += 2;
// don't add as char
helper.AddByte(b);
continue;
}
}
}
if ((ch & 0xFF80) == 0)
{
helper.AddByte((byte)ch); // 7 bit have to go as bytes because of Unicode
}
else
{
helper.AddChar(ch);
}
}
return(helper.ToString());
}
