Why is this URLSession.datatask not working in Swift 5 for macos - swift

Question

I am trying to make my own DynamicIP updater as a command line tool so I can set it up to run as a launch agent. I thought this would be a pretty simple thing to do, but I am not getting anything when I run this bit of code.
main.swift:
import AppKit
let userName = "yourUserName"
let password = "yourPassword"
let domain = "yourDomainName"
let ftp = "ftp"
let www = "www"
let checkIPURL = URL(string: "https://svc.joker.com/nic/checkip")
let domainUpdateURL = URL(string: "https://svc.joker.com/nic/update?username=\(userName)&password=\(password)&hostname=\(domain)")
let ftpUpdateURL = URL(string: "https://svc.joker.com/nic/update?username=\(userName)&password=\(password)&hostname=\(ftp).\(domain)")
let wwwUpdateURL = URL(string: "https://svc.joker.com/nic/update?username=\(userName)&password=\(password)&hostname=\(www).\(domain)")
var ipAddress = ""
if let url = checkIPURL {
print("1 - \(url)")
var request = URLRequest(url: url)
print("2 - \(request.url!)")
request.httpMethod = "POST"
print("3")
let session = URLSession.shared
print("4")
session.dataTask(with: request) { data, response, error in
print("4.1")
guard error == nil else {
print("Error:", error ?? "")
return
}
print("4.2")
guard (response as? HTTPURLResponse)?
.statusCode == 200 else {
print("down")
return
}
print("4.3")
if let data = data {
if let dataString = String(decoding: data, as: UTF8.self).removeHtmlTags() {
if let startIndex = dataString.lastIndex(of: " ") {
let chars = dataString.distance(from: startIndex, to: dataString.endIndex)-1
ipAddress = String(dataString.suffix(chars))
}
}
print(ipAddress)
} else {
print("No data")
}
print("up - \(response!)")
}.resume()
print("Done.")
}
extension String {
// Credit - Andrew - https://stackoverflow.com/questions/25983558/stripping-out-html-tags-from-a-string
func removeHtmlTags() -> String? {
do {
guard let data = self.data(using: .utf8) else {
return nil
}
let attributed = try NSAttributedString(data: data, options: [.documentType: NSAttributedString.DocumentType.html, .characterEncoding: String.Encoding.utf8.rawValue], documentAttributes: nil)
return attributed.string
} catch {
return nil
}
}
}
Everything outside of the session prints, but nothing inside of it prints (4.x statements).
I deleted the AppSandbox because when I have AppSandbox as a Capability and turn on Outgoing Connections I get a crash with EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subcode=0x0).
But even with AppSandbox deleted it does not work.
The strange thing is this works fine in a playground (with a slight modification turning the String extension into a function within the playground), which really makes this a head scratcher for me.
Here's my playground code:
import AppKit
let userName = "yourUserName"
let password = "yourPassword"
let domain = "yourDomainName"
let ftp = "ftp"
let www = "www"
let checkIPURL = URL(string: "https://svc.joker.com/nic/checkip")
let domainUpdateURL = URL(string: "https://svc.joker.com/nic/update?username=\(userName)&password=\(password)&hostname=\(domain)")
let ftpUpdateURL = URL(string: "https://svc.joker.com/nic/update?username=\(userName)&password=\(password)&hostname=\(ftp).\(domain)")
let wwwUpdateURL = URL(string: "https://svc.joker.com/nic/update?username=\(userName)&password=\(password)&hostname=\(www).\(domain)")
var ipAddress = ""
if let url = checkIPURL {
print("1 - \(url)")
var request = URLRequest(url: url)
print("2 - \(request.url!)")
request.httpMethod = "POST"
print("3")
let session = URLSession.shared
print("4")
session.dataTask(with: request) { data, response, error in
print("4.1")
guard error == nil else {
print("Error:", error ?? "")
return
}
print("4.2")
guard (response as? HTTPURLResponse)?
.statusCode == 200 else {
print("down")
return
}
print("4.3")
if let data = data {
//if let dataString = String(decoding: data, as: UTF8.self).removeHtmlTags() {
if let dataString = removeHtmlTags(data: data) {
if let startIndex = dataString.lastIndex(of: " ") {
let chars = dataString.distance(from: startIndex, to: dataString.endIndex)-1
ipAddress = String(dataString.suffix(chars))
}
}
print(ipAddress)
} else {
print("No data")
}
print("up - \(response!)")
}.resume()
print("Done.")
}
func removeHtmlTags(data: Data) -> String? {
do {
let attributed = try NSAttributedString(data: data, options: [.documentType: NSAttributedString.DocumentType.html, .characterEncoding: String.Encoding.utf8.rawValue], documentAttributes: nil)
return attributed.string
} catch {
return nil
}
}
Is there something else I need to do to get this to work within the command line tool app I am trying to build?