public static async Task<StorageFile> SaveAttachmentToTempAsync(Attachment attachment)
{
StorageFile file = await ApplicationData.Current.LocalFolder.CreateFileAsync(attachment.Filename, CreationCollisionOption.ReplaceExisting);
IRandomAccessStream randomStream = await file.OpenAsync(FileAccessMode.ReadWrite);
Stream writeStream = randomStream.AsStream();
attachment.Save(writeStream);
writeStream.Close();
return file;
}
public void Attachment_SavesWithMessage()
{
var msg = new WinPhone.Mail.Protocols.MailMessage()
{
From = new MailAddress("*****@*****.**"),
Scope = Scope.HeadersAndBody,
};
var firstAttachmentContents = "This is a test.";
var attachment = new Attachment()
{
Body = Convert.ToBase64String(Encoding.Default.GetBytes(firstAttachmentContents)),
ContentTransferEncoding = "base64",
Encoding = Encoding.ASCII,
Scope = Scope.HeadersAndBody,
};
attachment.Headers.Add("Content-Type", new HeaderValue(@"text/plain; filename=""Readme.txt"""));
msg.Attachments.Add(attachment);
var rnd = new Random();
var secondAttachmentContents = new byte[rnd.Next(10, 1000)];
rnd.NextBytes(secondAttachmentContents);
attachment = new Attachment()
{
Body = Convert.ToBase64String(secondAttachmentContents),
ContentTransferEncoding = "base64",
Encoding = Encoding.ASCII,
Scope = Scope.HeadersAndBody,
};
attachment.Headers.Add("Content-Type", new HeaderValue(@"application/binary; filename=""Data.bin"""));
msg.Attachments.Add(attachment);
var reparsed = Reparse(msg);
reparsed.Attachments.Count.ShouldBe(2);
reparsed.Attachments.First().Filename.ShouldBe("Readme.txt");
reparsed.Attachments.First().Body.ShouldBe(firstAttachmentContents);
reparsed.Attachments.Last().Filename.ShouldBe("Data.bin");
Convert.FromBase64String(reparsed.Attachments.Last().Body).ShouldBe(secondAttachmentContents);
}
public virtual void Add(Attachment viewOrAttachment)
{
if (viewOrAttachment.IsAttachment)
{
Attachments.Add(viewOrAttachment);
}
else
{
AlternateViews.Add(viewOrAttachment);
}
}
public async Task OpenAttachmentAsync(MailMessage message, Attachment attachment)
{
// Lazy load
if (attachment.Scope < Scope.HeadersAndBody)
{
// Check local storage
if (MailStorage.HasMessagePart(message.GetThreadId(), message.GetMessageId(), attachment.BodyId))
{
// TODO: Can we open the attachment directly from isolated storage?
attachment.Body = await MailStorage.GetMessagePartAsync(message.GetThreadId(), message.GetMessageId(), attachment.BodyId);
}
else
{
// Download from the network
await GmailImap.GetBodyPartAsync(message.Uid, attachment, async () =>
{
if (ActiveLabel.Info.StoreMessages && ActiveLabel.Info.StoreAttachments)
{
await MailStorage.StoreMessagePartAsync(message.GetThreadId(), message.GetMessageId(), attachment.BodyId, attachment.Body);
}
}, CancellationToken.None);
}
}
StorageFile file = await MailStorage.SaveAttachmentToTempAsync(attachment);
// http://architects.dzone.com/articles/lap-around-windows-phone-8-sdk
await Launcher.LaunchFileAsync(file);
// TODO: Delete temp files on app close?
}
private static string ParseMime(Stream reader, string boundary, ref int maxLength, ICollection<Attachment> attachments, Encoding encoding, char? termChar, Scope scope)
{
var maxLengthSpecified = maxLength > 0;
string data = null,
bounderInner = "--" + boundary,
bounderOuter = bounderInner + "--";
var n = 0;
var body = new System.Text.StringBuilder();
do
{
if (maxLengthSpecified && maxLength <= 0)
return body.ToString();
if (data != null)
{
body.Append(data);
}
data = reader.ReadLine(ref maxLength, encoding, termChar);
n++;
} while (data != null && !data.StartsWith(bounderInner));
while (data != null && !data.StartsWith(bounderOuter) && !(maxLengthSpecified && maxLength == 0))
{
data = reader.ReadLine(ref maxLength, encoding, termChar);
if (data == null) break;
var a = new Attachment { Encoding = encoding };
var part = new StringBuilder();
// read part header
while (!data.StartsWith(bounderInner) && data != string.Empty && !(maxLengthSpecified && maxLength == 0))
{
part.AppendLine(data);
data = reader.ReadLine(ref maxLength, encoding, termChar);
if (data == null) break;
}
a.RawHeaders = part.ToString();
// header body
// check for nested part
var nestedboundary = a.Headers.GetBoundary();
if (!string.IsNullOrEmpty(nestedboundary))
{
ParseMime(reader, nestedboundary, ref maxLength, attachments, encoding, termChar, scope);
while (!data.StartsWith(bounderInner))
data = reader.ReadLine(ref maxLength, encoding, termChar);
}
else
{
data = reader.ReadLine(ref maxLength, a.Encoding, termChar);
if (data == null) break;
var nestedBody = new StringBuilder();
while (!data.StartsWith(bounderInner) && !(maxLengthSpecified && maxLength == 0))
{
nestedBody.AppendLine(data);
data = reader.ReadLine(ref maxLength, a.Encoding, termChar);
if (data == null)
{
throw new EndOfStreamException("Unexpected end of file");
}
}
if (scope > Scope.HeadersAndMime)
{
a.SetBody(nestedBody.ToString());
}
attachments.Add(a);
}
}
return body.ToString();
}
