Add res.json(...) support - /w work around

[bpetty-formfast]

Almost all of my controllers return res.json(...).
run-middleware does not appear to correctly support this.

In express/lib/response.js it tries to see if Content-Type is set as a header, eventually through the getHeader(...) call.
getHeader is implemented a little poorly, expecting "this[kOutHeaders]" to equal null, but instead it is undefined.

That means all res.json(...) calls will fail. I haven't looked at your code, but is your response not extending OutgoingMessage ?

As a workaround, after I did runMiddleware(app), I added this little gem:

app.response.getHeader = (name) => { 
    return null; 
};`

[Aminadav]

If you wish the create a fix, I will review and merge it.

[customautosys]

Facing same problem due to undefined content-type. I tried to add a content-type to the headers in createRes but that didn't work either. Also I'm having a problem where the IP cannot be passed to the other middleware that I'm calling even though I have passed in {ip:...} in the options of runMiddleware.

TypeError: Cannot read properties of undefined (reading 'startsWith')
    at getIPFromReq (/home/walfin/Dokumentujo/Gitlab/quasar_upgrade/caswebsite/node_modules/directus/dist/utils/get-ip-from-req.js:22:15)
    at handler (/home/walfin/Dokumentujo/Gitlab/quasar_upgrade/caswebsite/node_modules/directus/dist/middleware/authenticate.js:25:48)
    at /home/walfin/Dokumentujo/Gitlab/quasar_upgrade/caswebsite/node_modules/directus/dist/utils/async-handler.js:3:66
    at Layer.handle [as handle_request] (/home/walfin/Dokumentujo/Gitlab/quasar_upgrade/caswebsite/node_modules/express/lib/router/layer.js:95:5)
    at trim_prefix (/home/walfin/Dokumentujo/Gitlab/quasar_upgrade/caswebsite/node_modules/express/lib/router/index.js:328:13)
    at /home/walfin/Dokumentujo/Gitlab/quasar_upgrade/caswebsite/node_modules/express/lib/router/index.js:286:9
    at Function.process_params (/home/walfin/Dokumentujo/Gitlab/quasar_upgrade/caswebsite/node_modules/express/lib/router/index.js:346:12)
    at next (/home/walfin/Dokumentujo/Gitlab/quasar_upgrade/caswebsite/node_modules/express/lib/router/index.js:280:10)
    at extractToken (/home/walfin/Dokumentujo/Gitlab/quasar_upgrade/caswebsite/node_modules/directus/dist/middleware/extract-token.js:30:5)
    at Layer.handle [as handle_request] (/home/walfin/Dokumentujo/Gitlab/quasar_upgrade/caswebsite/node_modules/express/lib/router/layer.js:95:5)
node:_http_outgoing:654
  const entry = headers[StringPrototypeToLowerCase(name)];
                       ^

TypeError: Cannot read properties of undefined (reading 'content-type')
    at ServerResponse.getHeader (node:_http_outgoing:654:24)
    at ServerResponse.res.get (/home/walfin/Dokumentujo/Gitlab/quasar_upgrade/caswebsite/node_modules/express/lib/response.js:812:15)
    at ServerResponse.json (/home/walfin/Dokumentujo/Gitlab/quasar_upgrade/caswebsite/node_modules/express/lib/response.js:274:13)
    at /home/walfin/Dokumentujo/Gitlab/quasar_upgrade/caswebsite/node_modules/directus/dist/middleware/error-handler.js:93:20
    at processTicksAndRejections (node:internal/process/task_queues:96:5)