Network Deployment (Distributed operating systems), v8.0 > Administer applications and their environment > Administer web services - Bus enabled web services > Enable web services through the service integration bus > Pass SOAP messages with attachments through the service integration bus
SOAP Messages with Attachments: WSDL examples
Use this task to see an example and explanation of a WSDL file with an attachment.
Example
The following example WSDL illustrates a simple operation that has one attachment called attch:
<binding name="MyBinding" type="tns:abc" > <soap:binding style="rpc" transport="http://schemas.xmlsoap.org/soap///publib.boulder.ibm.com/infocenter/wasinfo/v8r0/index.jsp?topic=/ "/> <operation name="MyOperation"> <soap:operation soapAction=""/> <input> <mime:multipartRelated> <mime:part> <soap:body parts="part1 part2 ..." use="encoded" namespace="http://mynamespace" encodingStyle="http://schemas.xmlsoap.org/soap/encoding"/> </mime:part> <mime:part> <mime:content part="attch" type="text/html"/> </mime:part> </mime:multipartRelated> </input> </operation> </binding>In this type of WSDL extension:
- There must be a part attribute (in this example attch) on the input message for the operation (in this example MyOperation). There can be other input parts to MyOperation that are not attachments.
- In the binding input there must either be a <soap:body> tag or a <mime:multipartRelated> tag, but not both.
- For MIME messages, the <soap:body> tag is inside a <mime:part> tag. There must only be one <mime:part> tag that contains a <soap:body> tag in the binding input and that must not contain a <mime:content> tag as well, because a content type of text/xml is assumed for the <soap:body> tag.
- There can be multiple attachments in a MIME message, each described by a <mime:part> tag.
- Each <mime:part> tag that does not contain a <soap:body> tag contains a <mime:content> tag that describes the attachment itself. The type attribute inside the <mime:content> tag is not checked or used by the service integration bus. It is there to suggest, to the application that uses the service integration bus, what the attachment contains . Multiple <mime:content> tags inside a single <mime:part> tag means that the back end service expects a single attachment with a type specified by one of the <mime:content> tags inside that <mime:part> tag.
- The parts="..." attribute inside the <soap:body> tag is assumed to contain the names of all the SOAP parts in the message, but not the attachment parts. If there are only attachment parts, specify parts="" (empty string). If you omit the parts attribute altogether, then the service integration bus assumes ALL parts including the attachments - which causes the attachments to appear twice.
In your WSDL you might have defined a schema for the attachment (for instance as a binary[]). The service integration technologies silently ignore this mapping and treat the attachment as a Data Handler.
You do not have to mention unreferenced attachments in the WSDL bindings.
SOAP with attachments: A definition
Related
Map of SDO data graphs for web services messages