//
// ConsoleHost.cs
//
// Jason Diamond <jason@injektilo.org>
//
// example: ConsoleHost test.aspx foo=bar baz=quux
//

using System;
using System.Diagnostics;
using System.IO;
using System.Text;
using System.Web;
using System.Web.Hosting;

public class ConsoleHost : MarshalByRefObject
{
	static void Main(string[] arguments)
	{
		if (arguments.Length == 0)
		{
			Console.Error.WriteLine("Usage: ConsoleHost page (name=value)*");
		}
		else
		{
			string page = arguments[0];

			// Build a query string using the command line arguments.

			string query = String.Empty;

			for (int i = 1; i < arguments.Length; ++i)
			{
				if (query != String.Empty)
				{
					query += "&";
				}

				int indexOfEquals = arguments[i].IndexOf('=');

				if (indexOfEquals != -1)
				{
					string name = arguments[i].Substring(0, indexOfEquals);
					string value = arguments[i].Substring(indexOfEquals + 1);
					query += name + "=" + EscapeValue(value);
				}
			}

			// CreateApplicationHost requires this assembly be in a
			// subdirectory called bin so copy this assembly there if it
			// doesn't already exist or is out of date.

			if (! Directory.Exists("bin"))
			{
				Directory.CreateDirectory("bin");
			}

			string mainModuleFileName = Process.GetCurrentProcess().MainModule.FileName;
			string binFileName = "bin\\" + Path.GetFileName(mainModuleFileName);

			if (! File.Exists(binFileName) || File.GetLastWriteTime(mainModuleFileName) > File.GetLastWriteTime(binFileName))
			{
				File.Copy(mainModuleFileName, binFileName, true);
			}

			// Create the host and process the request.

			ConsoleHost host = (ConsoleHost)ApplicationHost.CreateApplicationHost(typeof(ConsoleHost), "/", Directory.GetCurrentDirectory());
			host.ProcessRequest(page, query);
		}
	}

	void ProcessRequest(string page, string query)
	{
		HttpRuntime.ProcessRequest(new SimpleWorkerRequest(page, query, Console.Out));
	}

	// See RFC2396 for the details on why we need to do this.

	static string EscapeValue(string value)
	{
		StringBuilder result = new StringBuilder();

		foreach (char c in value)
		{
			if (c == ';' ||
				c == '/' ||
				c == '?' ||
				c == ':' ||
				c == '@' ||
				c == '&' ||
				c == '=' ||
				c == '+' ||
				c == '$' ||
				c == ',' ||
				c == '%')
			{
				result.AppendFormat("%{0:X2}", (int)c);
			}
			else if (c == ' ')
			{
				result.Append('+');
			}
			else
			{
				result.Append(c);
			}
		}

		return result.ToString();
	}
}