Connect to local mac server from device - ios

Question

Im trying to connect to a ruby sinatra server that im running locally on my mac from an app using the following code:
func load(finished: #escaping ()->()) {
// Create destination URL
let destinationFileUrl = documentsUrl.appendingPathComponent("Images.zip")
//Create URL to the source file you want to download
let fileURL = URL(string: "http://waynerumble.local~waynerumble:4567/download")
//Create Session
let sessionConfig = URLSessionConfiguration.default
let session = URLSession(configuration: sessionConfig)
let request = URLRequest(url:fileURL!)
let task = session.downloadTask(with: request) { (tempLocalUrl, response, error) in
if let tempLocalUrl = tempLocalUrl, error == nil {
// Success
if let statusCode = (response as? HTTPURLResponse)?.statusCode {
print("Successfully downloaded. Status code: \(statusCode)")
}
do {
try FileManager.default.copyItem(at: tempLocalUrl, to: destinationFileUrl)
} catch (let writeError) {
print("Error creating a file \(destinationFileUrl) : \(writeError)")
}
finished()
} else {
print("Error took place while downloading a file. Error description: %#", (error?.localizedDescription)! as String);
finished()
}
}
task.resume()
}
If i test the app from the simulator and set the fileURL to "http://127.0.0.1:4567/download" it works fine but from device i understand this has to be different so far I've tried:
From running ifconig in terminal i get 192.168.1.254 at en1 so i tried "http://192.168.1.255:4567/download" which gave me:
[] nw_socket_connect connectx failed: [13] Permission denied
Error took place while downloading a file. Error description: %# Could not connect to the server.
Ive also tried:
"http://waynerumble.local:4567/download" which gives:
Error took place while downloading a file. Error description: %# Could not connect to the server.
"http://waynerumble.local.~waynerumble:4567/download"(waynerumble is my computer name and username) which gives:
Error took place while downloading a file. Error description: %# A server with the specified hostname could not be found.
I also have wifi internet sharing on from both ethernet and iphone. Im not sure what else to try

Answer 1

192.168.1.255 is a brodcast adress for your network and you should not use it.
Why dont you connect to your real IP 192.168.1.254?
To bind Sinatra app to every interface try:
class MyApp < Sinatra::Base
set :bind, '0.0.0.0'
Then http://192.168.1.254:4567/download should work.
Also remember about opening desired port in the firewall.