Default headers are not applied with configuration type 5

[obust]

Hi, I am trying to configure the aurelia-api plugin to communicate with an API that communicate with the JSON API SPEC.
There are two ways to configure defaults for the fetch client https://aurelia-api.spoonx.org/configuration.html (configuration 3 and 5) but only the configuration 3 works with me.

// configuration type 3
aurelia.use
    .standardConfiguration()
    .feature('resources')
    .plugin('aurelia-api', config => {
      config
        .registerEndpoint('api', `${environment.apiBaseUrl}/`, {
          headers: {
            'Content-Type': 'application/vnd.api+json',
            'Accept': 'application/vnd.api+json'
          }
        })
        .setDefaultEndpoint('api');
    });

// configuration type 5
aurelia.use
    .standardConfiguration()
    .feature('resources')
    .plugin('aurelia-api', config => {
      config
        .registerEndpoint('api', fetchConfig => {
          fetchConfig
            .withBaseUrl(`${environment.apiBaseUrl}/`)
            .withDefaults({
              'headers': {
                'Content-Type': 'application/vnd.api+json',
                'Accept': 'application/vnd.api+json'
              }
            });
          })
        .setDefaultEndpoint('api');
    })

If I run my request with configuration 3, the headers are defined properly, however if I run my request with configuration 5 the Content-Type and Accept headers are set to the classic application/json and thus my request fail.

If I log the HttpClient to the console before the request is made, we can see that the defaults are properly saved, but apparently they are not used

HttpClient {activeRequestCount: 0, isRequesting: false, isConfigured: true, baseUrl: "http://localhost:8000/", defaults: Object…}
activeRequestCount : 0
baseUrl : "http://localhost:8000/"
defaults : Object
  headers : Object
    Accept : "application/vnd.api+json"
    Content-Type : "application/vnd.api+json"
    __proto__ : Object
  __proto__ : Object
interceptors : Array(1)
isConfigured : true
isRequesting : false

I would rather use the configuration 5 because it allows me to easily add custom interceptors (for example, automatically parse the request to json which is not done by default with this content-type).

I am doing something wrong or is there really a bug hiding there ?

[RWOverdijk]

There might be a bug hidden. The whole content-type part was written poorly in my opinion.

https://github.com/SpoonX/aurelia-api/blob/master/src/rest.js#L75

The options should be there. Could you figure this out and fix it? Otherwise, could you perhaps create a repository (with a tiny simple server) so I can reproduce and fix it? I'm very limited in time now (that seems to be the new fashion).

[RWOverdijk]

Closing this for now. If this is still relevant, feel free to reopen the issue.

Note: this is a copy-paste comment to clean up the issues. It's not personal, and I didn't review the issue before posting this. They're all outdated and I need a way to figure out what's still relevant.

Thank you for understanding :)