/// <summary>
/// Parses MIME header from the specified stream.
/// </summary>
/// <param name="stream">MIME header stream.</param>
/// <exception cref="ArgumentNullException">Is raised when <b>stream</b> is null.</exception>
public void Parse(SmartStream stream)
{
//TODO: ���� ��������� �������! �������� ����! �� ��� ���� �������� � utf8 �����
if (stream == null)
{
throw new ArgumentNullException("stream");
}
var headers = new List <KeyValuePair <string, byte[]> >();
var currentMemStream = new MemoryStream();
SmartStream.ReadLineAsyncOP readLineOP = new SmartStream.ReadLineAsyncOP(new byte[Workaround.Definitions.MaxStreamLineLength],
SizeExceededAction.
ThrowException);
while (true)
{
stream.ReadLine(readLineOP, false);
if (readLineOP.Error != null)
{
throw readLineOP.Error;
}
// We reached end of stream.
if (readLineOP.BytesInBuffer == 0)
{
if (currentMemStream.Length > 0)
{
AddToBinaryDict(headers, currentMemStream);
}
m_IsModified = false;
break;
}
// We got blank header terminator line.
if (readLineOP.LineBytesInBuffer == 0)
{
if (currentMemStream.Length > 0)
{
AddToBinaryDict(headers, currentMemStream);
}
m_IsModified = false;
break;
}
string line = Encoding.UTF8.GetString(readLineOP.Buffer, 0, readLineOP.BytesInBuffer);
var realBuffer = new List <byte>();
if ((line.StartsWith("From: \"") || line.StartsWith("To: \"")) && !line.EndsWith(">\r\n"))
{
var tmpArr = new byte[readLineOP.BytesInBuffer];
Array.Copy(readLineOP.Buffer, 0, tmpArr, 0, readLineOP.BytesInBuffer);
realBuffer.AddRange(tmpArr);
do
{
stream.ReadLine(readLineOP, false);
if (readLineOP.LineBytesInBuffer == 0)
{
break;
}
line = Encoding.UTF8.GetString(readLineOP.Buffer, 0, readLineOP.BytesInBuffer);
tmpArr = new byte[readLineOP.BytesInBuffer];
Array.Copy(readLineOP.Buffer, 0, tmpArr, 0, readLineOP.BytesInBuffer);
realBuffer.AddRange(tmpArr);
} while (!line.EndsWith(">\r\n"));
if (realBuffer.Count > 0)
{
line = Encoding.UTF8.GetString(realBuffer.ToArray());
}
}
// New header field starts.
if (currentMemStream.Length == 0)
{
currentMemStream.Write(readLineOP.Buffer, 0, readLineOP.BytesInBuffer);
}
// Header field continues.
else if (char.IsWhiteSpace(line[0]))
{
currentMemStream.Write(readLineOP.Buffer, 0, readLineOP.BytesInBuffer);
}
// Current header field closed, new starts.
else
{
AddToBinaryDict(headers, currentMemStream);
currentMemStream = new MemoryStream();
if (realBuffer.Count > 0)
{
currentMemStream.Write(realBuffer.ToArray(), 0, realBuffer.Count);
}
else
{
currentMemStream.Write(readLineOP.Buffer, 0, readLineOP.BytesInBuffer);
}
}
}
//Process dictionary
//Find content type
var contentTypeHeader =
headers
.Where(x => x.Value != null)
.Where(x => "content-type".Equals(x.Key, StringComparison.OrdinalIgnoreCase))
.Select(x => Encoding.UTF8.GetString(x.Value))
.SingleOrDefault();
var encoding = Encoding.UTF8;
if (contentTypeHeader != null)
{
var mime = MIME_h_ContentType.Parse(contentTypeHeader);
if (!string.IsNullOrEmpty(mime.Param_Charset))
{
encoding = EncodingTools.GetEncodingByCodepageName(mime.Param_Charset) ?? Encoding.UTF8;
}
else
{
//Join headers
var subjectRaw =
headers
.Where(x => x.Value != null)
.Where(x => "subject".Equals(x.Key, StringComparison.OrdinalIgnoreCase))
.Select(x => x.Value)
.SingleOrDefault();
//Try to detect hueristic
encoding = subjectRaw != null?EncodingTools.DetectInputCodepage(subjectRaw) : Encoding.UTF8;
}
}
foreach (var keyValuePair in headers)
{
Add(encoding.GetString(keyValuePair.Value));
}
}
