private int ParseHeader(string[] lines)
{
var bodyStart = 0;
for (var i = 0; i < lines.Length; i++)
{
var currentLine = lines[i].Replace("\n", "");
var lineType = GetHeaderLineType(currentLine);
switch (lineType)
{
// From:
case FromState:
From = Pop3Parse.From(currentLine);
break;
// Subject:
case SubjectState:
Subject = Pop3Parse.Subject(currentLine);
break;
// To:
case ToState:
To = Pop3Parse.To(currentLine);
break;
// Content-Type
case ContentTypeState:
_contentType =
Pop3Parse.ContentType(currentLine);
IsMultipart =
Pop3Parse.IsMultipart(_contentType);
if (IsMultipart)
{
// if boundary definition is on next
// line ...
if (_contentType
.Substring(_contentType.Length - 1, 1).
Equals(";"))
{
++i;
_multipartBoundary
= Pop3Parse.
MultipartBoundary(lines[i].
Replace("\n", ""));
}
else
{
// boundary definition is on same
// line as "Content-Type" ...
_multipartBoundary =
Pop3Parse
.MultipartBoundary(_contentType);
}
}
break;
case EndOfHeader:
bodyStart = i + 1;
break;
}
if (bodyStart > 0)
{
break;
}
}
return(bodyStart);
}
internal Pop3MessageComponents(string[] lines, int startOfBody, string multipartBoundary, string mainContentType)
{
var stopOfBody = lines.Length;
// if this email is a mixture of message
// and attachments ...
if (multipartBoundary == null)
{
string contentTransferEncoding = null;
var sbText = new StringBuilder();
for (long i = 0; i < startOfBody; i++)
{
var line = lines[i].Replace("\n", "").Replace("\r", "");
var lineType = Pop3Parse.GetSubHeaderLineType(line);
switch (lineType)
{
case Pop3Parse.ContentTypeType:
Pop3Parse.ContentType(line);
break;
case Pop3Parse.ContentTransferEncodingType:
contentTransferEncoding = Pop3Parse.ContentTransferEncoding(line);
break;
case Pop3Parse.ContentDispositionType:
Pop3Parse.ContentDisposition(line);
break;
case Pop3Parse.ContentDescriptionType:
Pop3Parse.ContentDescription(line);
break;
}
}
for (var i = startOfBody; i < stopOfBody; i++)
{
sbText.Append(lines[i]); //.Replace("\n","").Replace("\r",""));
}
// create a new component ...
_component.Add(new Pop3Component(mainContentType, contentTransferEncoding, sbText.ToString()));
}
else
{
var boundary = multipartBoundary;
var firstComponent = true;
// loop through whole of email ...
for (var i = startOfBody; i < stopOfBody;)
{
var boundaryFound = true;
string contentType = null;
string name = null;
string filename = null;
string contentTransferEncoding = null;
string contentDescription = null;
string contentDisposition = null;
string data = null;
// if first block of multipart data ...
if (firstComponent)
{
boundaryFound = false;
firstComponent = false;
while (i < stopOfBody)
{
var line = lines[i].Replace("\n", "").Replace("\r", "");
// if multipart boundary found then
// exit loop ...
if (Pop3Parse.GetSubHeaderLineType(line, boundary) == Pop3Parse.MultipartBoundaryFound)
{
boundaryFound = true;
++i;
break;
}
// ... else read next line ...
++i;
}
}
// check to see whether multipart boundary
// was found ...
if (!boundaryFound)
{
throw new Pop3MissingBoundaryException("Missing multipart boundary: " + boundary);
}
var endOfHeader = false;
// read header information ...
while ((i < stopOfBody))
{
var line = lines[i].Replace("\n", "").Replace("\r", "");
var lineType = Pop3Parse.GetSubHeaderLineType(line, boundary);
switch (lineType)
{
case Pop3Parse.ContentTypeType:
contentType = Pop3Parse.ContentType(line);
break;
case Pop3Parse.ContentTransferEncodingType:
contentTransferEncoding = Pop3Parse.ContentTransferEncoding(line);
break;
case Pop3Parse.ContentDispositionType:
contentDisposition = Pop3Parse.ContentDisposition(line);
break;
case Pop3Parse.ContentDescriptionType:
contentDescription = Pop3Parse.ContentDescription(line);
break;
case Pop3Parse.EndOfHeader:
endOfHeader = true;
break;
}
++i;
if (endOfHeader)
{
break;
}
while (i < stopOfBody)
{
// if more lines to read for this line ...
if (line.Substring(line.Length - 1, 1).Equals(";"))
{
var nextLine = lines[i].Replace("\r", "").Replace("\n", "");
switch (Pop3Parse.GetSubHeaderNextLineType(nextLine))
{
case Pop3Parse.NameType:
name = Pop3Parse.Name(nextLine);
break;
case Pop3Parse.FilenameType:
filename = Pop3Parse.Filename(nextLine);
break;
case Pop3Parse.EndOfHeader:
endOfHeader = true;
break;
}
if (!endOfHeader)
{
// point line to current line ...
line = nextLine;
++i;
}
else
{
break;
}
}
else
{
break;
}
}
}
var sbText = new StringBuilder();
var emailComposed = false;
// store the actual data ...
while (i < stopOfBody)
{
// get the next line ...
var line = lines[i].Replace("\n", "");
// if we've found the boundary ...
if (Pop3Parse.GetSubHeaderLineType(line, boundary) == Pop3Parse.MultipartBoundaryFound)
{
++i;
break;
}
if (Pop3Parse.GetSubHeaderLineType(line, boundary) == Pop3Parse.ComponetsDone)
{
emailComposed = true;
break;
}
// add this line to data ...
sbText.Append(lines[i]);
++i;
}
if (sbText.Length > 0)
{
data = sbText.ToString();
}
// create a new component ...
_component.Add(new Pop3Component(contentType, name, filename, contentTransferEncoding,
contentDescription, contentDisposition, data));
// if all multiparts have been
// composed then exit ..
if (emailComposed)
{
break;
}
}
}
}