private long ParseHeader(string[] lines)
{
int numberOfLines = lines.Length;
long bodyStart = 0;
for (int i = 0; i < numberOfLines; i++)
{
string currentLine = lines[i].Replace("\n", "");
int lineType = GetHeaderLineType(currentLine);
switch (lineType)
{
// From:
case m_fromState:
m_from = Pop3Parse.From(currentLine);
break;
// Subject:
case m_subjectState:
m_subject = Pop3Parse.Subject(currentLine);
break;
// To:
case m_toState:
m_to = Pop3Parse.To(currentLine);
break;
// Content-Type
case m_contentTypeState:
m_contentType =
Pop3Parse.ContentType(currentLine);
m_isMultipart =
Pop3Parse.IsMultipart(m_contentType);
if (m_isMultipart)
{
// if boundary definition is on next
// line ... (maybe - must check for boundary keyword)
if (m_contentType
.Substring(m_contentType.Length - 1, 1).
Equals(";"))
{
do
{
// look for boundary keyword
++i;
if (0 <= lines[i].IndexOf("boundary", StringComparison.InvariantCultureIgnoreCase))
{
break;
}
} while (i < numberOfLines);
m_multipartBoundary
= Pop3Parse.
MultipartBoundary(lines[i].
Replace("\n", ""));
}
else
{
// boundary definition is on same
// line as "Content-Type" ...
m_multipartBoundary =
Pop3Parse
.MultipartBoundary(m_contentType);
}
}
break;
case m_endOfHeader:
bodyStart = i + 1;
break;
}
if (bodyStart > 0)
{
break;
}
}
return(bodyStart);
}
public Pop3MessageComponents(string[] lines, long startOfBody
, string multipartBoundary, string mainContentType)
{
long stopOfBody = lines.Length;
// if this email is a mixture of message
// and attachments ...
if (multipartBoundary == null)
{
StringBuilder sbText = new StringBuilder();
for (long i = startOfBody; i < stopOfBody; i++)
{
sbText.Append(lines[i]);
}
// create a new component ...
m_component.Add(
new Pop3Component(
mainContentType,
sbText.ToString()));
}
else
{
string boundary = multipartBoundary;
bool firstComponent = true;
// loop through whole of email ...
for (long i = startOfBody; i < stopOfBody;)
{
bool 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)
{
string 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 ...
else
{
++i;
}
}
}
// check to see whether multipart boundary
// was found ...
if (!boundaryFound)
{
throw new
Pop3MissingBoundaryException
("Missing multipart boundary: " + boundary);
}
bool endOfHeader = false;
// read header information ...
while ((i < stopOfBody))
{
string line =
lines[i].Replace("\n", "").Replace("\r", "");
int 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;
}
else
{
while (i < stopOfBody)
{
// if more lines to read for this line ...
if (line.Substring(line.Length - 1, 1).Equals(";"))
{
string 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;
}
}
}
}
boundaryFound = false;
StringBuilder sbText = new StringBuilder();
bool emailComposed = false;
// store the actual data ...
while (i < stopOfBody)
{
// get the next line ...
string line = lines[i].Replace("\n", "");
// if we've found the boundary ...
if (Pop3Parse.GetSubHeaderLineType(line, boundary) ==
Pop3Parse.MultipartBoundaryFound)
{
boundaryFound = true;
++i;
break;
}
else
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 ...
m_component.Add(
new Pop3Component(
contentType,
name,
filename,
contentTransferEncoding,
contentDescription,
contentDisposition,
data));
// if all multiparts have been
// composed then exit ..
if (emailComposed)
{
break;
}
}
}
}