IOS application with HTML, need to download data from a third party server?

Question

JavaScript

Situation:
You have a simple wrapper iOS application with HTML. You need to download an XML file from a third party server. Possible options and why they have disappeared:
1. AJAX - Access-Control-Allow-Origin cannot be set on the server
2. Websockets - there is no support for ws: / on the server
3. iframe - "impossible".
4. Through the shell - "no."
5. Server-layer (the application knocks on the server with cross-domain AJAX, the server, in turn, takes the data from the source and sends them) - “no”.
6. Flash - no support on iOS

In general, you cannot enter some intermediate nodes and change something on the server. There is html, there is a server, you need to link them directly.

Are there any other ways?

Answer 1

If you can't/don't want to change the wrapper, then there is no other way.

Answer 2

Third party server - under your control? Use JSONP