public static string Read(Stream stream, byte[] delimiterBytes)
{
var dataString = string.Empty;
var byteBag = new List <byte>();
do
{
var boyerMoore = new BoyerMoore(delimiterBytes);
var startIndex = stream.Position;
var buffer4 = new byte[1024 * 1024];
var count = stream.Read(buffer4, 0, buffer4.Length);
if (count >= delimiterBytes.Length)
{
var searchIndex = boyerMoore.IndexOf(buffer4.Take(count).ToArray());
if (searchIndex == -1)
{
byteBag.AddRange(buffer4.Take(count - (delimiterBytes.Length - 1)));
stream.Seek(1 - delimiterBytes.Length, SeekOrigin.Current);
}
else
{
if (byteBag.Count > 0)
{
dataString = Encoding.UTF8.GetString(byteBag.ToArray());
byteBag.Clear();
}
dataString += Encoding.UTF8.GetString(buffer4.Take(searchIndex).ToArray());
stream.Seek(startIndex + searchIndex + delimiterBytes.Length, SeekOrigin.Begin);
break;
}
}
}while (stream.Position < stream.Length);
return(dataString);
}
public static void ProcessStream(HttpRequest httpRequest, Stream stream, string boundaryString, string session)
{
var headerBytes = Encoding.UTF8.GetBytes("--" + boundaryString + Environment.NewLine);
var trailerBytes = Encoding.UTF8.GetBytes(Environment.NewLine + boundaryString + "--" + Environment.NewLine);
var boundaryBytes = Encoding.UTF8.GetBytes(Environment.NewLine + "--" + boundaryString + Environment.NewLine);
var delimiterBytes = Encoding.UTF8.GetBytes(Environment.NewLine + "--" + boundaryString);
stream.Seek(headerBytes.Length, SeekOrigin.Begin);
using (var binaryReader = new BinaryReader(stream))
{
var contentLength = stream.Length;
while (stream.Position < contentLength - trailerBytes.Length)
{
var dataString = DelimiterHelper.Read(stream);
if (dataString.StartsWith("Content-Disposition: form-data;"))
{
var dataSegments = dataString.Split(';');
if (dataSegments.Length > 1)
{
var name = string.Empty;
var stringPair = dataSegments[1].Split('=');
if (stringPair.Length == 2 && string.Compare(stringPair[0], "name") != 0)
{
name = stringPair[1];
}
if (dataSegments.Length > 2)
{
stringPair = dataSegments[2].Split('=');
if (stringPair.Length == 2 && string.Compare(stringPair[0], "filename") != 0)
{
var httpFile = new HttpFile();
httpFile.Name = name;
httpFile.FileName = stringPair[1].Trim('"');
dataString = DelimiterHelper.Read(stream);
if (dataString.StartsWith("Content-Type:"))
{
httpFile.ContentType = dataString.Substring("Content-Type:".Length + 1);
httpRequest.Files.Add(httpFile);
}
//read binary data;
if (DelimiterHelper.Next(stream))
{
var startIndex = stream.Position;
var boyerMoore = new BoyerMoore(boundaryBytes);
do
{
var buffer2 = binaryReader.ReadBytes(1024 * 1024);
var searchIndex = boyerMoore.IndexOf(buffer2);
if (searchIndex == -1)
{
stream.Seek(1 - boundaryBytes.Length, SeekOrigin.Current);
}
else
{
if (searchIndex > 0)
{
var memoryMappedFile = MemoryMappedFile.OpenExisting(session);
httpFile.Stream = memoryMappedFile.CreateViewStream(startIndex, searchIndex);
}
stream.Seek(startIndex + searchIndex + boundaryBytes.Length, SeekOrigin.Begin);
break;
}
} while (stream.Position < contentLength - trailerBytes.Length);
}
}
}
else if (dataSegments.Length == 2)
{
if (dataSegments[1].Trim().StartsWith("name=\""))
{
name = dataSegments[1].TrimEnd('"').Substring(" name=\"".Length);
if (DelimiterHelper.Next(stream))
{
httpRequest.Form[name] = DelimiterHelper.Read(stream, delimiterBytes);
stream.Seek(2, SeekOrigin.Current);
}
}
}
}
}
}
}
}
