Fix iOS webserver

[saschal-j5int]

This Pull requests contains the following fixes for iOS webserver:

• The path property is actually on the dataRequest object not on dataRequest.url

• convert the request content into base64 otherwise we cannot handle binary requests. On the javascript side you can do something like this

   const body = request.body && request.bodyIsBase64 ? base64Utils.decode(request.body) : request.body

  with base64Util coming from https://github.com/niklasvh/base64-arraybuffer. This is a breaking change but since the webserver couldn't have worked that might be fine?

• Change the logic to not use an infinite loop but rather save the request locally and wait until the javascript plugin sends a response, then respond to the request with that

[saschal-j5int]

@bykof I finally manage to create a Pull request for our fixes that we applied to get the iOS webserver to work in our application.

[bykof]

Thank you for contributing @saschal-j5int 🙏