private void Parse(Stream stream)
{
this.Success = false;
if (!stream.CanRead)
{
return;
}
// Read the stream into a byte array
byte[] data = MultipartParser.ToByteArray(stream);
if (data.Length < 1)
{
return;
}
// finding the delimiter (the string in the beginning and end of the file
int delimeterIndex = MultipartParser.SimpleBoyerMooreSearch(data, Encoding.UTF8.GetBytes("\r\n")); // here we got delimeter index
if (delimeterIndex == -1)
{
return;
}
byte[] delimeterBytes = new byte[delimeterIndex];
Array.Copy(data, delimeterBytes, delimeterIndex);
// removing the very first couple of lines, till we get the beginning of the JPG file
byte[] newLineBytes = Encoding.UTF8.GetBytes("\r\n\r\n");
int startIndex = 0;
startIndex = MultipartParser.SimpleBoyerMooreSearch(data, newLineBytes);
if (startIndex == -1)
{
return;
}
int startIndexWith2Lines = startIndex + 4; // 4 is the bytes of "\r\n\r\n"
int newLength = data.Length - startIndexWith2Lines;
byte[] newByteArray = new byte[newLength];
Array.Copy(data, startIndex + 4, newByteArray, 0, newLength - 1);
// check for the end of the stream, is ther same delimeter
int isThereDelimeterInTheEnd = MultipartParser.SimpleBoyerMooreSearch(newByteArray, delimeterBytes);
if (isThereDelimeterInTheEnd == -1)
{
return; // the file corrupted so
}
int endIndex = isThereDelimeterInTheEnd - delimeterBytes.Length;
byte[] lastArray = new byte[endIndex];
Array.Copy(newByteArray, 0, lastArray, 0, endIndex);
this.FileContents = lastArray;
this.Success = true;
}
