Hi Brian, sorry for the late reply on this.
A ContentMappingService isn't going to solve your problem here ... IIRC the list of content mapping services supported by the Swagger Service is hardcoded, I think. It probably ought to be extensible/pluggable, I suppose. One for the backlog... <sigh> However, if I understand your problem, what you want is some sort of hint as to how to interpret the "result.value" node, ie the format "My file name:application/pdf:[the binary content base64-encoded]" ? If so, then I think all the information you need is already in the representation, in that the "result.links[rel='urn:org.restfulobjects:rels/return-type'].ref indicates a domain type of " http://localhost:8080/project/restful/domain-types/org.apache.isis.applib.value.Blob";. To be truly HATEOAS, your client ought to follow this link and then the returned representation shows: { ... canonicalName: "org.apache.isis.applib.value.Blob", ... } In other words, the original value has a return type whose canonical name is "org.apache.isis.applib.value.Blob" . The RO spec then defines how to parse the three parts. In practical terms you might decide there's no need to actually follow the http://localhost:8080/project/restful/domain-types/org.apache.isis.applib.value.Blob link; you could check for the suffix " domain-types/org.apache.isis.applib.value.Blob <http://localhost:8080/project/restful/domain-types/org.apache.isis.applib.value.Blob> " and decide that's good enough. Hope that helps a little... Dan On Wed, 6 Mar 2019 at 19:18, Brian K <harvestmoon...@gmail.com> wrote: > Hi, > > I want to return a file from a REST operation. I have an action that > returns a pdf as a Blob. In the wicket viewer that causes the browser to > download a file. The REST operation returns an object with content like > this: > > ``` > { > "links" : [ ], > "resulttype" : "scalarvalue", > "result" : { > "value" : "My file name:application/pdf:[the binary content > base64-encoded]", > "links" : [ { > "rel" : "urn:org.restfulobjects:rels/return-type", > "href" : " > > http://localhost:8080/project/restful/domain-types/org.apache.isis.applib.value.Blob > ", > "method" : "GET", > "type" : > > "application/json;profile=\"urn:org.restfulobjects:repr-types/domain-type\"" > } ], > "extensions" : { } > } > } > ``` > > The swagger spec that is generated lists this operation as returning a data > type of "object". Is there another data type that I can use here that > would generate something a little more intuitive? Maybe a swagger 2.0 > "file" data type, or a type described with the following yaml: > ``` > type: object > properties: > name : > type : string > mimeType : > type : string > data : > type : string > format : byte > ``` > > Would an implementation of a ContentMappingService in my project would > allow me to dictate how to represent the Blob data type to the REST > viewer? > > Thanks! > Brian >
