MTOM

MTOM（Message Transmission Optimization Mechanism），是W3C的MTOM的消息传输优化机制，有效地发送的二进制数据和从Web服务方法。将消息传输优化机制 (MTOM) 消息编码与WSHttpBinding 一起使用。MTOM是一种机制，用来以原始字节形式传输包含SOAP消息的较大二进制附件，从而使所传输的消息较小。

MIME-Version: 1.0
Content-Type: Multipart/Related;boundary=MIME_boundary;
type="application/xop+xml";
start="＜Service.xml@book.org＞";
start-info="text/xml"
Content-Description: An XML document with binary data in it
--MIME_boundary
Content-Type: application/xop+xml; 
charset=UTF-8; 
type="text/xml"
Content-Transfer-Encoding: 8bit
Content-ID: ＜Service.xml@book.org＞
＜env:Envelope xmlns:env="http://www.w3.org/2003/05/SOAP-envelope"＞ 
＜env:Header＞
＜/env:Header＞
<env:Body>
  <GetString xmlns="http://www.book.com/webservices">
    <attachment><xop:Include xmlns:xop='http://www.w3.org/2004/08/xop/include' 
      href='cid:http://www.book.com/attachment.png/>
    </attachment>
  </<GetString>
</env:Body>
＜/env:Envelope＞
-MIME_boundary
Content-Type: image/png
Content-Transfer-Encoding: binary
Content-ID: <http://www.book.com/attachment.png>
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