public async Task<ParseResult> Parse(MessageReader reader, ContentType type = ContentType.Text,
ContentSubtype subtype = ContentSubtype.Plain, Boundary boundary = null)
{
headers = new Headers(entity, type, subtype);
if ((await headers.Parse(reader)) == ParseResult.Failed)
return ParseResult.Failed;
content = new Content(entity);
ParseResult result = await content.Parse(reader, headers.contentType, headers.contentSubtype,
(headers.boundary != null) ? headers.boundary : boundary);
return result;
}
public async Task<ParseResult> Parse(MessageReader reader)
{
// parse until empty line, which start the body
String line = "";
bool foundContentType = false;
bool boundaryRequired = false;
// could there be an empty line in FWS? I think just crlf is not allowed in FWS
// if starts with the blank line then there is no header
// ends with blank line
// there are empty lines before the headers start. how many?
bool first = true;
while ((line = await reader.ReadLineAsync()) != null && (first || !first && line != ""))
{
first = false;
if (line != "")
WriteWithCrlf(line);
else
continue;
// hack, could there be a header line not matching
if (!Regex.IsMatch(line, "^([^ :]+[ ]*:)|([ \t]+)"))
{
return ParseStatus(ParseResult.Failed, "invalid headers");
}
else if (foundContentType && boundaryRequired && boundary == null)
{
boundary = Boundary.Parse(line);
}
else if (foundContentType == false)
{
Match m = re_content.Match(line);
if (m.Success)
{
ContentType type = ContentType.Text;
ContentSubtype subtype = ContentSubtype.Plain;
String tp = m.Groups[1].Value.ToLower();
String sbtp = m.Groups[2].Value.ToLower();
if (types.TryGetValue(tp, out type) == true)
contentType = type;
else
contentType = ContentType.Other;
if (subtypes.TryGetValue(sbtp, out subtype) == true)
contentSubtype = subtype;
else
contentSubtype = ContentSubtype.Other;
contentTypeFullStr = (tp==""?"text":tp) + "/" + (sbtp==""?"plain":sbtp);
foundContentType = true;
if (contentType == ContentType.Multipart)
{
boundaryRequired = true;
boundary = Boundary.Parse(m.Groups[3].Value);
}
}
}
}
if (boundaryRequired)
{
if (boundary == null)
return ParseStatus(ParseResult.Failed, "multipart media part with no boundary");
else
Boundary.Add(boundary);
}
SetSize();
WriteCrlf(); // delimeter between headers and body, not part of the headers, so not included in size
if (line == null)
return ParseResult.Eof;
else
return ParseResult.Ok;
}
public async Task<ParseResult> Parse(MessageReader reader, ContentType type = ContentType.Text,
ContentSubtype subtype = ContentSubtype.Plain, Boundary boundary = null)
{
if (type == ContentType.Multipart)
{
dataType = DataType.Multipart;
while (true)
{
String line = await reader.ReadLineAsync();
if (line == null)
{
SetSize();
return ParseResult.Eof;
}
else if (EmailParser.IsPostmark(line))
{
// consumed too much, probably missing boundary?
reader.PushCacheLine(line);
SetSize();
return ParseResult.Postmark;
}
WriteWithCrlf(line);
// find open boundary
if (boundary.IsOpen(line))
{
Email email = null;
ParseResult res;
do
{
// consume all parts, consisting of header (optional) and content
// the boundary token delimets the part
// the close boundary completes multipart parsing
// content in the multipart is responsible for consuming it's delimeter (end)
// exception is the last part which is also multipart
email = new Email(entity);
Add(email);
} while ((res = await email.Parse(reader, type, subtype, boundary)) == ParseResult.OkMultipart); // Ok
// if the last part is a multipart or message? itself then it doesn't consume the close boundary
// or more parts, continue parsing until all parts and close boundary are consumed
/*if (Ok(res) && (data.Last<Email>().content.dataType == DataType.Multipart ||
data.Last<Email>().content.dataType == DataType.Message))*/
if (res == ParseResult.Ok && boundary.NotClosed())
continue;
if (res != ParseResult.Failed)
SetSize();
return res;
}
else if (boundary.IsClose(line, reader))
{
SetSize();
return ParseResult.Ok; // OkMultipart
}
}
}
else if (type == ContentType.Message)
{
dataType = DataType.Message;
Email email = new Email(entity);
Add(email);
ParseResult res = await email.Parse(reader, type, subtype, boundary);
if (res != ParseResult.Failed)
SetSize();
return res;
}
else
{
dataType = DataType.Data;
while (true)
{
String line = await reader.ReadLineAsync();
if (line == null)
{
SetSize();
return ParseResult.Eof;
}
else if (EmailParser.IsPostmark(line))
{
// consumed too much, probably closing boundary is missing ?
reader.PushCacheLine(line);
SetSize();
return ParseResult.Postmark;
}
else if (boundary != null && boundary.IsOpen(line))
{
SetSize();
RewindLastCrlfSize();
WriteWithCrlf(line);
return ParseResult.OkMultipart; //Ok
}
else if (boundary != null && boundary.IsClose(line, reader))
{
SetSize();
RewindLastCrlfSize();
WriteWithCrlf(line);
return ParseResult.Ok; //OkMultipart
}
else
WriteWithCrlf(line);
}
}
}
public static void Add(Boundary boundary)
{
boundaries.Add(boundary);
}
public Headers(MemoryStream entity, ContentType outerType = ContentType.Text, ContentSubtype outerSubtype = ContentSubtype.Plain):base(entity)
{
if (outerType == ContentType.Multipart && outerSubtype == ContentSubtype.Digest)
{
contentType = ContentType.Message;
contentSubtype = ContentSubtype.Rfc822;
contentTypeFullStr = "message/rfc822";
} else
{
contentType = ContentType.Text;
contentSubtype = ContentSubtype.Plain;
contentTypeFullStr = "text/plain";
}
boundary = null;
}
void RemoveBoundary(Boundary boundary)
{
// close boundary removes all boundaries up in the stack, handles missing close boundary
int i = boundaries.FindLastIndex(b => b.boundary == boundary.boundary);
if (i >= 0)
boundaries.RemoveRange(i, boundaries.Count - i);
}
public async Task <ParseResult> Parse(MessageReader reader, ContentType type = ContentType.Text,
ContentSubtype subtype = ContentSubtype.Plain, Boundary boundary = null)
{
headers = new Headers(entity, type, subtype);
if ((await headers.Parse(reader)) == ParseResult.Failed)
{
return(ParseResult.Failed);
}
content = new Content(entity);
ParseResult result = await content.Parse(reader, headers.contentType, headers.contentSubtype,
(headers.boundary != null)?headers.boundary : boundary);
return(result);
}
public async Task <ParseResult> Parse(MessageReader reader, ContentType type = ContentType.Text,
ContentSubtype subtype = ContentSubtype.Plain, Boundary boundary = null)
{
if (type == ContentType.Multipart)
{
dataType = DataType.Multipart;
while (true)
{
String line = await reader.ReadLineAsync();
if (line == null)
{
SetSize();
return(ParseResult.Eof);
}
else if (EmailParser.IsPostmark(line))
{
// consumed too much, probably missing boundary?
reader.PushCacheLine(line);
SetSize();
return(ParseResult.Postmark);
}
WriteWithCrlf(line);
// find open boundary
if (boundary.IsOpen(line))
{
Email email = null;
ParseResult res;
do
{
// consume all parts, consisting of header (optional) and content
// the boundary token delimets the part
// the close boundary completes multipart parsing
// content in the multipart is responsible for consuming it's delimeter (end)
// exception is the last part which is also multipart
email = new Email(entity);
Add(email);
} while ((res = await email.Parse(reader, type, subtype, boundary)) == ParseResult.OkMultipart); // Ok
// if the last part is a multipart or message? itself then it doesn't consume the close boundary
// or more parts, continue parsing until all parts and close boundary are consumed
/*if (Ok(res) && (data.Last<Email>().content.dataType == DataType.Multipart ||
* data.Last<Email>().content.dataType == DataType.Message))*/
if (res == ParseResult.Ok && boundary.NotClosed())
{
continue;
}
if (res != ParseResult.Failed)
{
SetSize();
}
return(res);
}
else if (boundary.IsClose(line, reader))
{
SetSize();
return(ParseResult.Ok); // OkMultipart
}
}
}
else if (type == ContentType.Message)
{
dataType = DataType.Message;
Email email = new Email(entity);
Add(email);
ParseResult res = await email.Parse(reader, type, subtype, boundary);
if (res != ParseResult.Failed)
{
SetSize();
}
return(res);
}
else
{
dataType = DataType.Data;
while (true)
{
String line = await reader.ReadLineAsync();
if (line == null)
{
SetSize();
return(ParseResult.Eof);
}
else if (EmailParser.IsPostmark(line))
{
// consumed too much, probably closing boundary is missing ?
reader.PushCacheLine(line);
SetSize();
return(ParseResult.Postmark);
}
else if (boundary != null && boundary.IsOpen(line))
{
SetSize();
RewindLastCrlfSize();
WriteWithCrlf(line);
return(ParseResult.OkMultipart); //Ok
}
else if (boundary != null && boundary.IsClose(line, reader))
{
SetSize();
RewindLastCrlfSize();
WriteWithCrlf(line);
return(ParseResult.Ok); //OkMultipart
}
else
{
WriteWithCrlf(line);
}
}
}
}
public async Task <ParseResult> Parse(MessageReader reader)
{
// parse until empty line, which start the body
String line = "";
bool foundContentType = false;
bool boundaryRequired = false;
// could there be an empty line in FWS? I think just crlf is not allowed in FWS
// if starts with the blank line then there is no header
// ends with blank line
// there are empty lines before the headers start. how many?
bool first = true;
while ((line = await reader.ReadLineAsync()) != null && (first || !first && line != ""))
{
first = false;
if (line != "")
{
WriteWithCrlf(line);
}
else
{
continue;
}
// hack, could there be a header line not matching
if (!Regex.IsMatch(line, "^([^ :]+[ ]*:)|([ \t]+)"))
{
return(ParseStatus(ParseResult.Failed, "invalid headers"));
}
else if (foundContentType && boundaryRequired && boundary == null)
{
boundary = Boundary.Parse(line);
}
else if (foundContentType == false)
{
Match m = re_content.Match(line);
if (m.Success)
{
ContentType type = ContentType.Text;
ContentSubtype subtype = ContentSubtype.Plain;
String tp = m.Groups[1].Value.ToLower();
String sbtp = m.Groups[2].Value.ToLower();
if (types.TryGetValue(tp, out type) == true)
{
contentType = type;
}
else
{
contentType = ContentType.Other;
}
if (subtypes.TryGetValue(sbtp, out subtype) == true)
{
contentSubtype = subtype;
}
else
{
contentSubtype = ContentSubtype.Other;
}
contentTypeFullStr = (tp == ""?"text":tp) + "/" + (sbtp == ""?"plain":sbtp);
foundContentType = true;
if (contentType == ContentType.Multipart)
{
boundaryRequired = true;
boundary = Boundary.Parse(m.Groups[3].Value);
}
}
}
}
if (boundaryRequired)
{
if (boundary == null)
{
return(ParseStatus(ParseResult.Failed, "multipart media part with no boundary"));
}
else
{
Boundary.Add(boundary);
}
}
SetSize();
WriteCrlf(); // delimeter between headers and body, not part of the headers, so not included in size
if (line == null)
{
return(ParseResult.Eof);
}
else
{
return(ParseResult.Ok);
}
}
public static void Add(Boundary boundary)
{
boundaries.Add(boundary);
}