Provide optional URL prefix to generated spec json

[VersBinarii]

Description of the feature

Would you consider adding an option to pass in url prefix into the generated spec?

"paths" : {
    "/my_prefix/rest/of/my/path" : {
      "get" : {
        "parameters" : [
          {
            "name" : "X-Customheader",
            "in" : "header",
            "required" : true,
            "schema" : {
              "type" : "string"
             }
           }
         ]
      }
    ... snip ...
 

Code example (if possible)

Maybe something like that:

let spec_options = SpecOptions::default().with_url_prefix("/my_prefix");
let my_api_schema = my_api.spec_endpoint_with_options(options);

[sunli829]

Maybe it can be solved with prefix_path attribute.

poem/poem-openapi/tests/api.rs

Line 88 in 7ada5b6

#[OpenApi(prefix_path = "/hello", tag = "MyTags::CommonOperations")]

[VersBinarii]

Unfortunately not. This prefix comes from config file and additionally we have abstraction over the handlers so the prefix is dynamic.

I could have a go at implementing it if you would be ok with it

[sunli829]

Welcome to PR😁