/// <summary>
/// 取 X-Forwarded-For 头
/// <para>X-Forwarded-For: client,proxy1,proxy2</para>
/// </summary>
/// <param name="httpRequest"></param>
public static String GetForwardedFor(HttpRequest httpRequest)
{
try {
if (httpRequest == null)
{
return("::");
}
IHeaderDictionary headers = httpRequest.Headers;
if (!headers.ContainsKey("X-Forwarded-For"))
{
return("::");
}
String xForwardedFor = headers["X-Forwarded-For"];
if (String.IsNullOrWhiteSpace(xForwardedFor))
{
return("::");
}
String[] xForwardedForArray = xForwardedFor.Replace(" ", String.Empty).Split(',', StringSplitOptions.RemoveEmptyEntries);//移除所有空格并按','来分组
if (xForwardedForArray == null || xForwardedForArray.GetLength(0) < 1)
{
return("::");
}
String clientIp = xForwardedForArray[0];
if (String.IsNullOrWhiteSpace(clientIp))
{
return("::");
}
if (RegexIPv6.IsMatch(clientIp))
{
return(clientIp);
}
else if (RegexIPv4.IsMatch(clientIp))
{
Boolean b1 = IPAddress.TryParse(clientIp, out IPAddress ipAddress);
if (!b1 || ipAddress == null)
{
return("::ffff:" + clientIp);
}
else
{
return(ipAddress.MapToIPv6().ToString());
}
}
else
{
return("::");
}
} catch {
//这里可能会抛 HttpRequest 已经被释放的异常
return("::");
}
}
/// <summary>
/// 取 X-Real-Ip 头
/// </summary>
/// <param name="httpRequest"></param>
public static String GetRealIp(HttpRequest httpRequest)
{
try {
if (httpRequest == null)
{
return("::");
}
IHeaderDictionary headers = httpRequest.Headers;
if (!headers.ContainsKey("X-Real-IP"))
{
return("::");
}
String xRealIP = headers["X-Real-IP"];
if (String.IsNullOrWhiteSpace(xRealIP))
{
return("::");
}
if (RegexIPv6.IsMatch(xRealIP))
{
return(xRealIP);
}
else if (RegexIPv4.IsMatch(xRealIP))
{
Boolean b1 = IPAddress.TryParse(xRealIP, out IPAddress ipAddress);
if (!b1 || ipAddress == null)
{
return("::ffff:" + xRealIP);
}
else
{
return(ipAddress.MapToIPv6().ToString());
}
}
else
{
return("::");
}
}catch {
//这里可能会抛 HttpRequest 已经被释放的异常
return("::");
}
}