static int Main(string[] args)
{
long reply = Gwan.getReply(args[0]);
int nb_args = args.Length != 0 ? args.Length - 1 : 0;
// list all program arguments
String str = "<h3>main()'s argv[0-" + nb_args + "] listed:</h3>";
for (int i = 1; i < args.Length; i++)
{
str += "argv[" + i + "] '" + args[i] + "'<br>";
}
Gwan.xbufCat(reply, str);
return(200); // HTTP status (200:'OK')
}
public static int Main(string[] args)
{
Gwan.xbufCat(Gwan.getReply(args[0]), "Hello, C#!");
return(200); // HTTP status (200:'OK')
}
// ----------------------------------------------------------------------------
public static int Main(string[] args)
{
StringBuilder reply = new StringBuilder();
int nb_args = args.Length != 0 ? args.Length - 1 : 0;
// ---- no query parameters were provided, redirect client to "loan.html"
if (nb_args == 0)
{
reply.Append("HTTP/1.1 302 Found\r\nContent-type:text/html\r\n"
+ "Location: /csp_loan.html\r\n\r\n"
+ "<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\">"
+ "<html><head><title>Redirect</title></head>"
+ "<body>Click <a href=\"/csp_loan.html\">HERE</A> for redirect.</body></html>");
//lupus commented: Gwan.xbufCat(Gwan.getReply(args[0]), reply.ToString());
return(302); // HTTP status(302:'Redirect')
}
else // ---- if we have query parameters, we process a GET/POST form
{
string szName = "";
string[] Months = new string[] { "January", "February", "March", "April", "May", "June",
"July", "August", "September", "October", "November", "December" };
double amount, rate, term, payment, interest, principal, cost;
int month = 0, year = 1, lastpayment = 1;
// the form field "names" we want to find values for
string Name = "-", Amount = "0", Rate = "0", Term = "0";
DateTime start = DateTime.Now;
// ----------------------------------------------------------------------
// get the form field values from the URI parameters
// ----------------------------------------------------------------------
for (int i = 1; i < args.Length; ++i)
{
switch (args[i][0])
{
case 'a': Amount = GetArg(args[i]); break;
case 'n': Name = GetArg(args[i]); break;
case 'r': Rate = GetArg(args[i]); break;
case 't': Term = GetArg(args[i]); break;
}
}
// set default values if a parameter is missing
if (Name == null)
{
Name = "-";
}
if (Amount == null)
{
Amount = "100000.0";
}
if (Rate == null)
{
Rate = "3.5";
}
if (Term == null)
{
Term = "1.0";
}
// ----------------------------------------------------------------------
// all litteral strings provided by a client must be escaped this way
// if you inject them into an HTML page
// ----------------------------------------------------------------------
szName = HtmlEncode(Name);
// filter input data to avoid all the useless/nasty cases
amount = Double.Parse(Amount);
if (amount < 1)
{
amount = 1;
}
rate = Double.Parse(Rate);
if (rate > 19)
{
rate = 19;
}
else
if (rate > 1)
{
rate /= 100;
}
else
if (rate < 1)
{
rate = 1 / 100;
}
term = Double.Parse(Term);
if (term < 0.1)
{
term = 1 / 12;
}
else
if (term > 800)
{
term = 800;
}
// calculate the monthly payment amount
payment = amount * rate / 12 * Math.Pow(1 + rate / 12, term * 12)
/ (Math.Pow(1 + rate / 12, term * 12) - 1);
cost = (term * 12 * payment) - amount;
// build the top of our HTML page
reply.Append("<!DOCTYPE HTML>"
+ "<html lang=\"en\"><head><title>Loan Calculator</title><meta http-equiv"
+ "=\"Content-Type\" content=\"text/html; charset=utf-8\">"
+ "<link href=\"/imgs/style.css\" rel=\"stylesheet\" type=\"text/css\">"
+ "</head><body style=\"margin:16px;\"><h2>Dear ");
if (szName != "" && szName != "-")
{
reply.Append(szName);
}
else
{
reply.Append("client");
}
reply.Append(", your loan goes as follows:</h2>");
if (term >= 1)
{
term = Convert.ToInt32(term);
}
else
{
term = Math.Ceiling(12 * term);
}
reply.Append("<br><table class=\"clean\" width=240px>"
+ "<tr><th>loan</th><th>details</th></tr>");
reply.AppendFormat("<tr class=\"d1\"><td>Amount</td><td>{0:n}</td></tr>", amount);
reply.AppendFormat("<tr class=\"d0\"><td>Rate</td><td>{0:n}%</td></tr>", rate * 100);
reply.AppendFormat("<tr class=\"d1\"><td>Term</td><td>{0:n} ", term);
if (term >= 1)
{
reply.Append("year");
}
else
{
reply.Append("month");
}
reply.AppendFormat("(s)</td></tr><tr class=\"d0\"><td>Cost</td><td>{0:n}", cost);
reply.AppendFormat("({0:n}%)</td></tr></table>", 100 / (amount / cost));
reply.AppendFormat("<br><table class=\"clean\" width=112px><tr class=\"d1\"><td><b>YEAR {0:d}</b>", year);
reply.Append("</td></tr></table><table class=\"clean\" width=550px>"
+ "<tr><th>month</th><th>payment</th><th>interest</th>"
+ "<th>principal</th><th>balance</th></tr>");
for (;;) // output monthly payments
{
month++;
interest = (amount * rate) / 12;
if (amount > payment)
{
amount = (amount - payment) + interest;
principal = payment - interest;
}
else // calculate last payment
{
if (lastpayment > 0)
{
lastpayment = 0;
payment = amount;
principal = amount - interest;
amount = 0;
}
else // all payments are done, just padd the table
{
amount = 0;
payment = 0;
interest = 0;
principal = 0;
}
}
reply.AppendFormat("<tr class=\"d{0:d}\">", month & 1);
reply.Append("<td>" + Months[month - 1] + "</td>");
reply.AppendFormat("<td>{0:n}</td>", payment);
reply.AppendFormat("<td>{0:n}</td>", interest);
reply.AppendFormat("<td>{0:n}</td>", principal);
reply.AppendFormat("<td>{0:n}</td></tr>", amount);
if (month == 12)
{
if (amount > 0)
{
month = 0; year++;
reply.Append("</table><br><table class=\"clean\" width=112px>"
+ "<tr class=\"d1\"><td><b>YEAR ");
reply.Append(year);
reply.Append("</b>"
+ "</td></tr></table><table class=\"clean\" width=550px>"
+ "<tr><th>month</th><th>payment</th><th>interest</th>"
+ "<th>principal</th><th>balance</th></tr>");
}
else
{
break;
}
}
}
TimeSpan elapsed = DateTime.Now - start; // not counting code below
// time the process and close the HTML page
reply.Append("</table><br>This page was generated in ");
reply.Append(elapsed.TotalMilliseconds);
reply.Append(" ms.<br>(on a 3GHz CPU 1 ms = "
+ "3,000,000 cycles)<br></body></html>");
}
// -------------------------------------------------------------------------
// output result
// -------------------------------------------------------------------------
//Console.Write(reply.ToString());
Gwan.xbufCat(Gwan.getReply(args[0]), reply.ToString());
return(200); // HTTP status(200:'OK')
}
