Understanding SOAP Attachments
Some people tend to forget that HTTP is a transport mechanism only—HTTP doesn’t define the content of the message that it carries. That’s why we can use HTTP to transport SOAP messages from one place to another. Likewise, SOAP, which vendors have based on XML, only defines one potential type of message within the HTTP envelope. Just as bill collectors commonly place advertising in your billing statement, vendors can place other materials within the HTTP envelope that carries a SOAP message. In fact, that’s precisely what this section of the chapter talks about.
The secret to SOAP attachments is using the Multipurpose Internet Mail Extensions (MIME). This is the same magic used to send attachments in mail. Anyone ...
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