private bool ProxyRemoteConnectionFilter(ProxyServer.Client client)
{
int port = client.ProxyDestinationPort;
string host = client.ProxyDestinationHost;
bool redirect = false;
if (port == this.mSpecialProxyAuthPort && host.Equals(this.mSpecialProxyAuthHost, StringComparison.OrdinalIgnoreCase))
{
redirect = true;
}
else
{
bool sessionOK = (bool)client.ProxySessionTag;
if (!sessionOK)
{
if (80 == port)
{
redirect = true;
}
else
{
client.ProxyDestinationHost = null;
}
}
//
}
if (redirect)
{
client.ProxyDestinationHost = IPAddress.Loopback.ToString();
client.ProxyDestinationPort = this.mLocalAuthServerPort;
client.ProxyRemoteConnectionPostProcess = this.ProxyConnectionPostProcess;
}
return(true);
}
private void ProcessNewConn(Socket sock)
{
sock.NoDelay = true;
ProxyServer.Client client = new ProxyServer.Client(sock, true);
client.HttpRequestHeaderUserHandler = this.ProcessHttpRequestHeader;
client.HttpRequestDataUserHandler = this.ProcessHttpRequestData;
client.Start();
}
private bool ProxyConnectionPostProcess(ProxyServer.Client client)
{
Socket sock = client.ProxyRemoteSocket;
string localEndPoint = sock.LocalEndPoint.ToString();
ProxyInfo proxy = new ProxyInfo();
proxy.realIP = client.RemoteAddress;
proxy.proxyType = client.ProxyTypeName;
lock (this.mDicProxyInfoReverseLookup)
{
this.mDicProxyInfoReverseLookup[localEndPoint] = proxy;
}
return(true);
}
private bool ProxyClientConnectionFilter(ProxyServer.Client client)
{
DateTime now = DateTime.Now;
TimeSpan dt;
SessionInfo session = null;
bool sessionOK = false;
string clientIP = client.RemoteAddress;
if (!string.IsNullOrEmpty(clientIP))
{
lock (gDicIpSession)
{
if (!gDicIpSession.TryGetValue(clientIP, out session))
{
session = null;
}
if (session != null)
{
dt = now - session.lastUpdatedTime;
sessionOK = ((int)dt.TotalMinutes < session.aliveTimeInMinute);
if (sessionOK)
{
session.lastUpdatedTime = now;
}
else
{
gDicIpSession.Remove(clientIP);
}
//
}
//
}
//
}
client.ProxyRemoteConnectionFilter = this.ProxyRemoteConnectionFilter;
client.ProxySessionTag = sessionOK;
return(true);
}
private bool ProcessHttpRequestHeader(ProxyServer.Client client)
{
if (client.HttpRequestDataSize > 1024)
{
return(false);
}
string method = client.HttpRequestMethod;
if (string.IsNullOrEmpty(method))
{
return(false);
}
method = method.ToUpper();
if (!method.Equals("GET", StringComparison.Ordinal) && !method.Equals("POST", StringComparison.Ordinal))
{
return(false);
}
return(true);
}
private void PrepareLoginPageHTML(ProxyServer.Client client, StringBuilder sb, int currentSessionAliveTimeout)
{
string prefix = DateTime.Now.ToString(DateTimeSaltFormat);
Socket sock = client.ProxyLocalSocket;
ProxyInfo proxy = null;
string remoteEndPoint = sock.RemoteEndPoint.ToString();
lock (this.mDicProxyInfoReverseLookup)
{
if (!this.mDicProxyInfoReverseLookup.TryGetValue(remoteEndPoint, out proxy))
{
proxy = null;
}
this.mDicProxyInfoReverseLookup.Remove(remoteEndPoint);
}
string realIP = null;
string proxyType = null;
if (proxy != null)
{
realIP = proxy.realIP;
proxyType = proxy.proxyType;
}
if (null == realIP)
{
realIP = string.Empty;
}
string title = string.Empty;
if (!string.IsNullOrEmpty(proxyType))
{
title = (proxyType + " ");
}
title += "proxy version ";
title += ProxyServerVersion.ToString();
sb.AppendLine("<!DOCTYPE html>");
sb.AppendLine("<html lang=\"en\">");
sb.AppendLine("<head>");
sb.Append("<title>");
sb.Append(title);
sb.AppendLine("</title>");
sb.AppendLine("<meta charset=\"utf-8\" />");
sb.AppendLine("<style>");
#if HTML_INPUT_STYLE_FOR_SINGLE_TYPE
sb.AppendLine("input[type=text] { padding:0;margin:0;width:100%;height:40px;font-size:32px; }");
#endif
sb.AppendLine("body { padding:0;margin:0;width:100%;font-size:32px; }");
sb.AppendLine(".fullw { padding:0;margin:0;width:100%;height:40px;font-size:32px; }");
sb.AppendLine(".sep1 { padding:0;margin:0;overflow:hidden;width:100%;height:8px; }");
sb.Append("input { ");
sb.Append("margin:0;padding:5px;");
sb.Append("width:100%;height:40px;font-size:32px;");
sb.Append("color:#999da0;background-color:white;");
sb.Append("border-radius:10px;border:1px solid #999da0;");
sb.AppendLine(" }");
sb.AppendLine("</style>");
sb.AppendLine("</head>");
sb.AppendLine("<body style=\"color:#454545;background-color:white;font-family:Verdana;\" >");
this.PrepareHeadJs(sb);
sb.AppendLine("<div class=\"fullw\" >");
sb.AppendLine("<div style=\"float:left;width:1%;overflow:hidden;\" > </div>");
sb.AppendLine("<div style=\"float:left;width:97.8%;\" >");
sb.AppendLine("<div class=\"fullw\" >Password</div>");
sb.AppendLine("<div><input id=\"Passwd\" type=\"password\" /></div>");
sb.AppendLine("<div style=\"display:none;\" ><iframe id=\"HdnLoginFrame\" name=\"HdnLoginFrame\" onload=\"LoginCompleted()\" ></iframe></div>");
sb.Append("<div><form id=\"form1\" method=\"POST\" target=\"HdnLoginFrame\" ");
sb.Append("action=\"/api/v1/sessions\"");
sb.AppendLine(" >");
sb.AppendLine("<div><input id=\"PasswdSALT\" name=\"PasswdSALT\" type=\"hidden\" value=\"" + prefix + "\" /></div>");
sb.AppendLine("<div><input id=\"HashedPasswd\" name=\"HashedPasswd\" type=\"hidden\" /></div>");
sb.AppendLine("<div class=\"fullw\" >IP address</div>");
sb.AppendLine("<div><input name=\"IpAddress\" type=\"text\" value=\"" + realIP + "\" /></div>");
sb.AppendLine("<div class=\"fullw\" >Session Alive Time ( minutes )</div>");
sb.AppendLine("<div><input name=\"SessionAliveTime\" type=\"text\" value=\"" + currentSessionAliveTimeout.ToString() + "\" /></div>");
sb.AppendLine("<div class=\"sep1\" > </div>");
sb.Append("<div><input id=\"BtnLogin\" type=\"submit\" value=\"Login\" class=\"fullw\" style=\"");
sb.Append("margin:5px;height:60px;color:white;background-color:#007aff;border-color:#007aff;\"");
sb.AppendLine("onclick=\"BeforeSubmit();\" /></div>");
sb.AppendLine("</form></div>");
sb.AppendLine("<div class=\"sep1\" > </div>");
sb.Append("<div id=\"DivErrMsg\" class=\"fullw\" style=\"color:#ff4555;\" ></div>");
this.PrepareTailJS(sb);
sb.AppendLine("</div>");
sb.AppendLine("<div style=\"float:right;width:1%;overflow:hidden;\" > </div>");
sb.AppendLine("</div>");
sb.AppendLine("</body>");
sb.AppendLine("</html>");
}
private bool ProcessHttpRequestData(ProxyServer.Client client)
{
StringBuilder sb = new StringBuilder();
string clientIP = client.RemoteAddress;
string method = client.HttpRequestMethod.ToUpper();
string host = client.HttpRequestHost;
SessionInfo session = null;
int currentSessionAliveTimeout = 0;
if (method.Equals("GET", StringComparison.Ordinal))
{
int pos = host.IndexOf(':');
if (pos >= 0)
{
host = host.Substring(0, pos);
}
if (host.Equals(this.mSpecialProxyAuthHost, StringComparison.OrdinalIgnoreCase))
{
if (!string.IsNullOrEmpty(clientIP))
{
lock (gDicIpSession)
{
if (!gDicIpSession.TryGetValue(clientIP, out session))
{
session = null;
}
//
}
//
}
if (session != null)
{
currentSessionAliveTimeout = session.aliveTimeInMinute;
}
else
{
if (currentSessionAliveTimeout <= 0)
{
currentSessionAliveTimeout = 480;
}
//
}
this.PrepareLoginPageHTML(client, sb, currentSessionAliveTimeout);
}
else
{
this.PrepareWelcomePage(sb);
}
}
else
{
byte[] postDataBuf = client.HttpRequestData;
if (null == postDataBuf)
{
return(false);
}
string postData = Encoding.ASCII.GetString(postDataBuf);
if (this.ProxyLogin(postData))
{
sb.AppendLine(GetJsonStringResponse(0, "Login OK !"));
}
else
{
sb.AppendLine(GetJsonStringResponse(5, "Login failed"));
}
//
}
string html = sb.ToString();
byte[] htmlBuf = Encoding.UTF8.GetBytes(html);
client.HttpResponseData = htmlBuf;
return(true);
}
