upspinGet.swift

// With appropriate values for userName, keyNetAddr, storeNetAddr, dirNetAddr, proquint, and fileName
let client = SpinnerNewClient(userName, keyNetAddr, storeNetAddr, dirNetAddr, proquint)

var contents: Data

do {
    try contents = upspin.client.get(fileName)
} catch {
    fatalError("failed to get file: \(error)")
}

if let contentsString = String(data: contents, encoding: .utf8) {
    print(contentsString)
} else {
    fatalError("unable to convert data into a string for display")
}