发送邮件请求在mime数据上失败

Question

我在一个基于C#的ActiveSync客户端上工作，在尝试将Sendmail命令发送到服务器时遇到了问题。我使用以下格式的mime数据进行测试：

    var testMsg = @"From: a@b.com
To: a@b.com
Cc:
Bcc:
Subject: From NSync
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: base64
VGhpcyBpcyB0aGUgYm9keSB0ZXh0Lg==";

    var data = UTF8Encoding.UTF8.GetBytes(testMsg);

当服务器获取数据时，我在Exchange客户端日志中收到以下异常：

Command_WorkerThread_Exception : 
--- Exception start ---
Exception type: Microsoft.Exchange.AirSync.Wbxml.WbxmlException
Exception message: Invalid WBXML code/codepage from client
Exception level: 0
Exception stack trace:    at Microsoft.Exchange.AirSync.Wbxml.WbxmlReader.ReadXmlDocument()
   at Microsoft.Exchange.AirSync.AirSyncRequest.get_XmlDocument()
   at Microsoft.Exchange.AirSync.Command.get_XmlRequest()
   at Microsoft.Exchange.AirSync.Command.WorkerThread()
Inner exception follows...
Exception type: System.IndexOutOfRangeException
Exception message: Index was outside the bounds of the array.
Exception level: 1
Exception stack trace:    at Microsoft.Exchange.AirSync.Wbxml.WbxmlSchema30.GetName(Int32 tag)
   at Microsoft.Exchange.AirSync.Wbxml.WbxmlReader.FillXmlElement(XmlElement elem, Int32 depth, Boolean elemIsSecureData, Boolean elemIsBlobData)
   at Microsoft.Exchange.AirSync.Wbxml.WbxmlReader.FillXmlElement(XmlElement elem, Int32 depth, Boolean elemIsSecureData, Boolean elemIsBlobData)
   at Microsoft.Exchange.AirSync.Wbxml.WbxmlReader.ReadXmlDocument()
--- Exception end ---

Answer 1

我发现我的问题与发送的消息无关。这个问题与我们序列化到WBXML的方式有关。

在写入不透明数据时，对于MIME内容，首先需要放入数据长度，然后放入字节数组。我写数据长度的代码关闭了，这导致了这个问题。