/// <summary>
/// Converts ContentTransferEncoding_enum to string. NOTE: Returns null for ContentTransferEncoding_enum.NotSpecified.
/// </summary>
/// <param name="encoding">ContentTransferEncoding_enum value to convert.</param>
/// <returns></returns>
public static string ContentTransferEncodingToString(ContentTransferEncoding_enum encoding)
{
if (encoding == ContentTransferEncoding_enum._7bit)
{
return("7bit");
}
else if (encoding == ContentTransferEncoding_enum.QuotedPrintable)
{
return("quoted-printable");
}
else if (encoding == ContentTransferEncoding_enum.Base64)
{
return("base64");
}
else if (encoding == ContentTransferEncoding_enum._8bit)
{
return("8bit");
}
else if (encoding == ContentTransferEncoding_enum.Binary)
{
return("binary");
}
else if (encoding == ContentTransferEncoding_enum.Unknown)
{
return("unknown");
}
else
{
return(null);
}
}
/// <summary>
/// Converts ContentTransferEncoding_enum to string. NOTE: Returns null for ContentTransferEncoding_enum.NotSpecified.
/// </summary>
/// <param name="encoding">ContentTransferEncoding_enum value to convert.</param>
/// <returns></returns>
public static string ContentTransferEncodingToString(ContentTransferEncoding_enum encoding)
{
if(encoding == ContentTransferEncoding_enum._7bit){
return "7bit";
}
else if(encoding == ContentTransferEncoding_enum.QuotedPrintable){
return "quoted-printable";
}
else if(encoding == ContentTransferEncoding_enum.Base64){
return "base64";
}
else if(encoding == ContentTransferEncoding_enum._8bit){
return "8bit";
}
else if(encoding == ContentTransferEncoding_enum.Binary){
return "binary";
}
else if(encoding == ContentTransferEncoding_enum.Unknown){
return "unknown";
}
else{
return null;
}
}
/// <summary>
/// Encodes data with specified content transfer encoding.
/// </summary>
/// <param name="data">Data to encode.</param>
/// <param name="encoding">Encoding with what to encode data.</param>
private byte[] EncodeData(byte[] data, ContentTransferEncoding_enum encoding)
{
// Allow only known Content-Transfer-Encoding (ContentTransferEncoding_enum value),
// otherwise we don't know how to encode data.
if (encoding == ContentTransferEncoding_enum.NotSpecified)
{
throw new Exception("Please specify Content-Transfer-Encoding first !");
}
if (encoding == ContentTransferEncoding_enum.Unknown)
{
throw new Exception(
"Not supported Content-Transfer-Encoding. If it's your custom encoding, encode data yourself and set it with DataEncoded property !");
}
if (encoding == ContentTransferEncoding_enum.Base64)
{
return Core.Base64Encode(data);
}
else if (encoding == ContentTransferEncoding_enum.QuotedPrintable)
{
return Core.QuotedPrintableEncode(data);
}
else
{
return data;
}
}
/// <summary>
/// Parses entity and it's child entities.
/// </summary>
internal void Parse(string text)
{
StringReader r = new StringReader(text);
r.ReadToFirstChar();
// If starts with ( then multipart/xxx, otherwise normal single part entity
if (r.StartsWith("("))
{
// Entities are (entity1)(entity2)(...) <SP> ContentTypeSubType
while (r.StartsWith("("))
{
IMAP_BODY_Entity entity = new IMAP_BODY_Entity();
entity.Parse(r.ReadParenthesized());
entity.m_pParentEntity = this;
m_pChildEntities.Add(entity);
r.ReadToFirstChar();
}
// Read multipart values. (nestedMimeEntries) contentTypeSubMediaType
string contentTypeSubMediaType = r.ReadWord();
m_pContentType = MimeUtils.ParseMediaType("multipart/" + contentTypeSubMediaType);
}
else
{
// Basic fields for non-multipart
// contentTypeMainMediaType contentTypeSubMediaType (conentTypeParameters) contentID contentDescription contentEncoding contentSize [envelope] [contentLine]
// Content-Type
string contentTypeMainMediaType = r.ReadWord();
string contentTypeSubMediaType = r.ReadWord();
if (contentTypeMainMediaType.ToUpper() != "NIL" && contentTypeSubMediaType.ToUpper() != "NIL")
{
m_pContentType =
MimeUtils.ParseMediaType(contentTypeMainMediaType + "/" + contentTypeSubMediaType);
}
// Content-Type header field parameters
// Parameters syntax: "name" <SP> "value" <SP> "name" <SP> "value" <SP> ... .
r.ReadToFirstChar();
string conentTypeParameters = "NIL";
if (r.StartsWith("("))
{
conentTypeParameters = r.ReadParenthesized();
StringReader contentTypeParamReader =
new StringReader(MimeUtils.DecodeWords(conentTypeParameters));
List <HeaderFieldParameter> parameters = new List <HeaderFieldParameter>();
while (contentTypeParamReader.Available > 0)
{
string parameterName = contentTypeParamReader.ReadWord();
string parameterValue = contentTypeParamReader.ReadWord();
parameters.Add(new HeaderFieldParameter(parameterName, parameterValue));
}
m_pContentTypeParams = parameters.ToArray();
}
else
{
// Skip NIL
r.ReadWord();
}
// Content-ID:
string contentID = r.ReadWord();
if (contentID.ToUpper() != "NIL")
{
m_ContentID = contentID;
}
// Content-Description:
string contentDescription = r.ReadWord();
if (contentDescription.ToUpper() != "NIL")
{
m_ContentDescription = contentDescription;
}
// Content-Transfer-Encoding:
string contentEncoding = r.ReadWord();
if (contentEncoding.ToUpper() != "NIL")
{
m_ContentEncoding = MimeUtils.ParseContentTransferEncoding(contentEncoding);
}
// Content Encoded data size in bytes
string contentSize = r.ReadWord();
if (contentSize.ToUpper() != "NIL")
{
m_ContentSize = Convert.ToInt32(contentSize);
}
// Only for ContentType message/rfc822
if (ContentType == MediaType_enum.Message_rfc822)
{
r.ReadToFirstChar();
// envelope
if (r.StartsWith("("))
{
m_pEnvelope = new IMAP_Envelope();
m_pEnvelope.Parse(r.ReadParenthesized());
}
else
{
// Skip NIL, ENVELOPE wasn't included
r.ReadWord();
}
// TODO:
// BODYSTRUCTURE
// contentLine
}
// Only for ContentType text/xxx
if (contentTypeMainMediaType.ToLower() == "text")
{
// contentLine
string contentLines = r.ReadWord();
if (contentLines.ToUpper() != "NIL")
{
m_ContentLines = Convert.ToInt32(contentLines);
}
}
}
}
/// <summary>
/// Parses entity and it's child entities.
/// </summary>
internal void Parse(string text)
{
StringReader r = new StringReader(text);
r.ReadToFirstChar();
// If starts with ( then multipart/xxx, otherwise normal single part entity
if (r.StartsWith("("))
{
// Entities are (entity1)(entity2)(...) <SP> ContentTypeSubType
while (r.StartsWith("("))
{
IMAP_BODY_Entity entity = new IMAP_BODY_Entity();
entity.Parse(r.ReadParenthesized());
entity.m_pParentEntity = this;
m_pChildEntities.Add(entity);
r.ReadToFirstChar();
}
// Read multipart values. (nestedMimeEntries) contentTypeSubMediaType
string contentTypeSubMediaType = r.ReadWord();
m_pContentType = MimeUtils.ParseMediaType("multipart/" + contentTypeSubMediaType);
}
else
{
// Basic fields for non-multipart
// contentTypeMainMediaType contentTypeSubMediaType (conentTypeParameters) contentID contentDescription contentEncoding contentSize [envelope] [contentLine]
// Content-Type
string contentTypeMainMediaType = r.ReadWord();
string contentTypeSubMediaType = r.ReadWord();
if (contentTypeMainMediaType.ToUpper() != "NIL" && contentTypeSubMediaType.ToUpper() != "NIL")
{
m_pContentType =
MimeUtils.ParseMediaType(contentTypeMainMediaType + "/" + contentTypeSubMediaType);
}
// Content-Type header field parameters
// Parameters syntax: "name" <SP> "value" <SP> "name" <SP> "value" <SP> ... .
r.ReadToFirstChar();
string conentTypeParameters = "NIL";
if (r.StartsWith("("))
{
conentTypeParameters = r.ReadParenthesized();
StringReader contentTypeParamReader =
new StringReader(MimeUtils.DecodeWords(conentTypeParameters));
List<HeaderFieldParameter> parameters = new List<HeaderFieldParameter>();
while (contentTypeParamReader.Available > 0)
{
string parameterName = contentTypeParamReader.ReadWord();
string parameterValue = contentTypeParamReader.ReadWord();
parameters.Add(new HeaderFieldParameter(parameterName, parameterValue));
}
m_pContentTypeParams = parameters.ToArray();
}
else
{
// Skip NIL
r.ReadWord();
}
// Content-ID:
string contentID = r.ReadWord();
if (contentID.ToUpper() != "NIL")
{
m_ContentID = contentID;
}
// Content-Description:
string contentDescription = r.ReadWord();
if (contentDescription.ToUpper() != "NIL")
{
m_ContentDescription = contentDescription;
}
// Content-Transfer-Encoding:
string contentEncoding = r.ReadWord();
if (contentEncoding.ToUpper() != "NIL")
{
m_ContentEncoding = MimeUtils.ParseContentTransferEncoding(contentEncoding);
}
// Content Encoded data size in bytes
string contentSize = r.ReadWord();
if (contentSize.ToUpper() != "NIL")
{
m_ContentSize = Convert.ToInt32(contentSize);
}
// Only for ContentType message/rfc822
if (ContentType == MediaType_enum.Message_rfc822)
{
r.ReadToFirstChar();
// envelope
if (r.StartsWith("("))
{
m_pEnvelope = new IMAP_Envelope();
m_pEnvelope.Parse(r.ReadParenthesized());
}
else
{
// Skip NIL, ENVELOPE wasn't included
r.ReadWord();
}
// TODO:
// BODYSTRUCTURE
// contentLine
}
// Only for ContentType text/xxx
if (contentTypeMainMediaType.ToLower() == "text")
{
// contentLine
string contentLines = r.ReadWord();
if (contentLines.ToUpper() != "NIL")
{
m_ContentLines = Convert.ToInt32(contentLines);
}
}
}
}
/// <summary>
/// Converts ContentTransferEncoding_enum to string.
/// </summary>
/// <param name="encoding">Encoding value to convert.</param>
/// <returns></returns>
private string ContentTransferEncoding_ToString(ContentTransferEncoding_enum encoding)
{
string retVal = "";
if(encoding == ContentTransferEncoding_enum._7bit){
retVal = "7bit";
}
else if(encoding == ContentTransferEncoding_enum.QuotedPrintable){
retVal = "quoted-printable";
}
else if(encoding == ContentTransferEncoding_enum.Base64){
retVal = "base64";
}
else if(encoding == ContentTransferEncoding_enum._8bit){
retVal = "8bit";
}
else if(encoding == ContentTransferEncoding_enum.Binary){
retVal = "binary";
}
return retVal;
}
