// -------------------------- MessagePartSplitter -----------------------
// input is an array holding the unfolded lines of the message.
// Build and return a list of MimeMessagePart objects. Each part object holds the
// lines of a part of the message.
// ( a part is either the header part or the boundary string delimited content parts.
public static InMail.MimeMessagePartList MessagePartSplitter(string InStream)
{
InMail.MimeMessagePartList parts = new InMail.MimeMessagePartList( );
bool currentlyBetweenParts = false;
StringStack bdryStack = new StringStack( );
int Ex = -1;
string line = null;
MimeMessagePart.PartInProgress pip =
new MimeMessagePart.PartInProgress(MimePartCode.Top);
while (true)
{
// advance in string.
int lineBx = Ex + 1;
if (lineBx >= InStream.Length)
{
break;
}
// the next line in the stream. recognize folds depending on if currently within
// a part header or within the message lines of the part ( no folding there )
if (pip.CurrentlyAmoungPropertyLines == true)
{
IntStringPair rv = ScanEndUnfoldedLine(InStream, lineBx);
Ex = rv.a;
line = rv.b;
}
else
{
IntStringPair rv = ScanEndLine(InStream, lineBx);
Ex = rv.a;
line = rv.b;
}
// calc what kind of a line in the mime document we have here.
MimeLineCode lc = MimeParser.CalcLineCode(line, bdryStack.GetTop( ));
if ((lc == MimeLineCode.Property) &&
(pip.CurrentlyAmoungMessageLines == true))
{
lc = MimeLineCode.Text;
}
switch (lc)
{
case MimeLineCode.Property:
{
StringPair propPair = MimeParser.SplitPropertyLine(line);
// the content-type property. Could have an boundary="xxxxx" element.
// Boundary strings in a mime document have scope. That is, within one
// boundary ( section ) of the document, there can be sub boundaries
// ( sub sections )
if (propPair.a.ToLower( ) == "content-type")
{
PartProperty.ContentType ct =
MimeParser.ParseContentType(propPair.b);
if ((ct.Boundary != null) && (ct.Boundary != ""))
{
bdryStack.Push(ct.Boundary);
}
}
pip.AddLine(lineBx, line);
break;
}
// part boundary line. load the lines of the current part and reset the line
// counter of this new part.
case MimeLineCode.PartBdry:
if (pip.HasLines == true)
{
parts.AddNewPart(InStream, pip);
}
pip = new MimeMessagePart.PartInProgress(MimePartCode.Content);
currentlyBetweenParts = false;
break;
case MimeLineCode.PartEndBdry:
if (pip.HasLines == true)
{
parts.AddNewPart(InStream, pip);
}
pip = new MimeMessagePart.PartInProgress(MimePartCode.Content);
if (bdryStack.IsNotEmpty)
{
bdryStack.Pop( );
}
currentlyBetweenParts = true;
break;
// we have a line which is not a property line, not a boundary line.
default:
{
// just starting out. discard the "+OK" response sent by the server immed
// before the start of the message.
if ((pip.PartCode == MimePartCode.Top) &&
(pip.PartIsJustStarting == true) &&
(line.Length >= 3) &&
(line.Substring(0, 3) == "+OK"))
{
}
// currently handling property lines.
else if (pip.CurrentlyAmoungPropertyLines == true)
{
// a blank line switches from property lines to message lines.
if (line.Length == 0)
{
pip.CurrentlyAmoungPropertyLines = false;
pip.CurrentlyAmoungMessageLines = true;
}
// what is this text line doing amoung the property lines ??
// for now, just ignore it.
else
{
}
}
else if (currentlyBetweenParts == false)
{
pip.AddLine(lineBx, line);
}
break;
}
}
}
// load the lines of the final in progress part.
if (pip.HasLines == true)
{
parts.AddNewPart(InStream, pip);
}
return(parts);
}
// -------------------------- MessagePartSplitter -----------------------
// input is an array holding the unfolded lines of the message.
// Build and return a list of MimeMessagePart objects. Each part object holds the
// lines of a part of the message.
// ( a part is either the header part or the boundary string delimited content parts.
public static InMail.MimeMessagePartList MessagePartSplitter(string[] InLines)
{
InMail.MimeMessagePartList parts = new InMail.MimeMessagePartList( );
int curPartBx = -1;
int curPartCx = 0;
MimePartCode curPartCode = MimePartCode.Top;
bool currentlyBetweenParts = false;
bool partIsJustStarting = true;
StringStack bdryStack = new StringStack( );
for (int Ix = 0; Ix < InLines.Length; ++Ix)
{
string line = InLines[Ix];
MimeLineCode lc = MimeParser.CalcLineCode(line, bdryStack.GetTop( ));
switch (lc)
{
case MimeLineCode.Property:
{
StringPair propPair = MimeParser.SplitPropertyLine(line);
// the content-type property. Could have an boundary="xxxxx" element.
// Boundary strings in a mime document have scope. That is, within one
// boundary ( section ) of the document, there can be sub boundaries
// ( sub sections )
if (propPair.a.ToLower( ) == "content-type")
{
PartProperty.ContentType ct =
MimeParser.ParseContentType(propPair.b);
if ((ct.Boundary != null) && (ct.Boundary != ""))
{
bdryStack.Push(ct.Boundary);
}
}
break;
}
// part boundary line. load the lines of the current part and reset the line
// counter of this new part.
case MimeLineCode.PartBdry:
if (curPartBx != -1)
{
parts.AddNewPart(curPartCode)
.LoadLines(InLines, curPartBx, curPartCx);
}
curPartCx = 0;
curPartBx = -1;
curPartCode = MimePartCode.Content;
currentlyBetweenParts = false;
partIsJustStarting = true;
break;
case MimeLineCode.PartEndBdry:
if (curPartBx != -1)
{
parts.AddNewPart(curPartCode)
.LoadLines(InLines, curPartBx, curPartCx);
}
curPartCx = 0;
curPartBx = -1;
if (bdryStack.IsNotEmpty)
{
bdryStack.Pop( );
}
currentlyBetweenParts = true;
break;
default:
break;
}
// add to range of lines in the current part.
if ((currentlyBetweenParts == false) && (lc != MimeLineCode.PartBdry))
{
if ((partIsJustStarting == true) && (line == ""))
{
}
else
{
++curPartCx;
if (curPartBx == -1)
{
curPartBx = Ix;
}
}
partIsJustStarting = false;
}
}
// load the lines of the final in progress part.
if (curPartBx != -1)
{
parts.AddNewPart(curPartCode)
.LoadLines(InLines, curPartBx, curPartCx);
}
return(parts);
}