public async Task<List<Body>> GetBodies(IByteStreamReader streamReader, ContentTypeFieldValue contentType, string transportEncoding)
{
var reader = new BufferedByteReader(streamReader);
switch (contentType.Type)
{
case "multipart":
var bodyPartReader = new BodyReader(ContentType, Header.ContentTransferEncoding);
var bodies = await bodyPartReader.ReadBody(reader);
break;
case "text":
var textString = "";
using (var memstream = await streamReader.GetMemoryStreamAsync())
{
using (var unEncoded = await MailMethods.UnEncode(memstream, Header.ContentTransferEncoding))
{
using (var textReader = new StreamReader(unEncoded, Encoding.GetEncoding(Header.ContentType.Charset)))
{
textString = await textReader.ReadToEndAsync();
}
}
}
var textBody = new Body();
textBody.Content = (new MemoryStream(Encoding.Unicode.GetBytes(textString)));
break;
case "image":
case "audio":
case "video":
case "application":
var binaryBody = new Body();
binaryBody.Content = await streamReader.GetMemoryStreamAsync());
break;
}
}
public static async Task <MemoryStream> UnEncode(MemoryStream encodedContent, string transferEncoding)
{
var unEncodedContent = new MemoryStream();
try
{
switch (transferEncoding.ToLower())
{
case "7bit":
case "8bit":
case "binary":
unEncodedContent = encodedContent;
break;
case "quoted-printable":
unEncodedContent = MailMethods.FromQuotedPrintable(encodedContent);
break;
case "base64":
var base64String = Encoding.ASCII.GetString(encodedContent.ToArray());
var bytes = Convert.FromBase64String(base64String);
await unEncodedContent.WriteAsync(bytes, 0, bytes.Length);
break;
default:
using (var writer = new StreamWriter(unEncodedContent, Encoding.ASCII))
{
writer.WriteLine("Unknown 'Content-transfer-encoding' encounterd: {0}", transferEncoding);
writer.WriteLine("------Encoded Content-------");
await writer.FlushAsync();
await encodedContent.CopyToAsync(unEncodedContent);
}
break;
}
return(unEncodedContent);
}
catch (Exception ex)
{
using (var writer = new StreamWriter(unEncodedContent, Encoding.ASCII))
{
writer.WriteLine(ex.Message);
writer.WriteLine("------Encoded Content-------");
await writer.FlushAsync();
await encodedContent.CopyToAsync(unEncodedContent);
return(unEncodedContent);
}
}
}
