Different action by prefix of URL

Question

Here is my situation: i\'m calling file locally on my ios application ( Running in Swift).

If the file is a jpg, one action happen, if the file is a mp4, another act

Answer 1

You can make a URL request for the url header using the httpMethod HEAD to check your url mime type without the need to download the data first:

let link = "https://www.dropbox.com/s/sk46eyglvijlrec/horse.jpg?dl=1"
let url = URL(string: link)!

var request = URLRequest(url: url)
request.httpMethod = "HEAD"
URLSession.shared.dataTask(with: request) { _ , response , _ in
    guard let response = response, (response as? HTTPURLResponse)?.statusCode == 200 else { return }
    DispatchQueue.main.async() {
        print("mimeType", response.mimeType ?? "nil")            // image/jpeg
        print("suggestedFilename:", response.suggestedFilename ?? "no suggestedFilename")   // horse.jpg
        print("expectedContentLength:", response.expectedContentLength ?? "nil")   // 352614
        print("textEncodingName:", response.textEncodingName ?? "nil")
        print("url:", response.url ?? "nil")                 // "https://dl.dropboxusercontent.com/content_link/RNrhGtvroTLU1Gww7eQo1N1ePRiix68zsqZJ1xWPjKm3pmOUNQwNVntbPuFG4jZ8/file?dl=1"
    }
}.resume()