public static void Decode(HttpContext context)
{
ParserMode mode = ParserMode.FirstLine;
var body = new StringBuilder();
var reader = new StreamReader(context.Channel.InputStream);
string line;
while ((line = reader.ReadLine()) != null)
{
switch (mode)
{
case ParserMode.FirstLine:
reader.SkipWhiteSpace();
string[] requestLine = line.Split(new char[] { ' ' }, 3);
if (requestLine.Length != 3)
{
throw new Exception("Expected first line to contain three words in accordance HTTP specification.");
}
if (!requestLine[2].ToLower().StartsWith("http/"))
{
throw new Exception($"Status line for requests should end with the HTTP version. Your line ended with { requestLine[2] }.");
}
context.Request.Method = requestLine[0];
context.Request.Path = requestLine[1];
if (requestLine[1].Contains("?"))
{
var parameters = requestLine[1].Split('?')[1];
var parsed = QueryValue.TryParseList(parameters, out ArrayList result);
if (parsed)
{
context.Request.Query = new QueryCollection(result);
}
else
{
context.Request.Query = QueryCollection.Empty;
}
context.Request.Path = requestLine[1].Split('?')[0];
}
else
{
context.Request.Path = requestLine[1];
}
context.Request.Path = requestLine[1].Split('?')[0];
if (requestLine.Length >= 3)
{
context.Request.Protocol = requestLine[2];
}
else
{
context.Request.Protocol = HttpProtocol.Http11;
}
mode = ParserMode.Headers;
break;
case ParserMode.Headers:
if (string.IsNullOrEmpty(line))
{
mode = ParserMode.Body;
continue;
}
int seperatorIndex = line.IndexOf(": ");
if (seperatorIndex > 1)
{
var name = line.Substring(0, seperatorIndex);
var value = line.Substring(seperatorIndex + 1);
context.Request.Headers.Add(name, value);
}
break;
case ParserMode.Body:
// TODO: Improve performace by not reading every body line
//Stream req = context.Session.InputStream;
//req.Seek(0, System.IO.SeekOrigin.Begin);
//string body = new StreamReader(req).ReadToEnd();
body.AppendLine(line);
break;
}
}
var bytes = Encoding.UTF8.GetBytes(body.ToString());
if (bytes.Length > 0)
{
context.Request.Body = new MemoryStream(bytes);
context.Request.Body.Position = 0;
}
var cookieParser = new HttpCookieParser();
var cookies = context.Request.Headers.Cookie;
if (cookies != null)
{
context.Request.Cookies = cookieParser.Parse(cookies);
}
}
