Alamofire.download() method: Where is the file and did it save successfully?

Question

The example for using Alamofire.download() works just fine, but there isn't any detail in how to access the resulting downloaded file. I can figure out where the file is and what it was named based on the destination I set and the original file request I made, but I would assume that there is a value I should be able to access to get the full final download path and file name in the response.

How do I access the name of the file and how do I know if it saved successfully? I can see delegate methods in the actual Alamofire code that appear to handle the delegate completion calls for the downloading process, but how do I / can I access the file details in the .response block?

Answer 1

Swift 2.1 and a little simpler:

var localPath: NSURL? Alamofire.download(.GET,     "http://jplayer.org/video/m4v/Big_Buck_Bunny_Trailer.m4v",     destination: { (temporaryURL, response) in     let directoryURL = NSFileManager.defaultManager().URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask)[0]     let pathComponent = response.suggestedFilename                  localPath = directoryURL.URLByAppendingPathComponent(pathComponent!)         return localPath!     })     .response { (request, response, _, error) in         print(response)         print("Downloaded file to \(localPath!)")     } ) 

Still hard to understand why they are using closures to set the destination path...

Answer 2

The example on the Alamofire readme file actually has the file path in it, so I grab it with a separate variable to use elsewhere in my code. It is not very elegant and I am hoping there is a way to get that info in the response, but for now, this is getting the job done:

var fileName: String? var finalPath: NSURL?  Alamofire.download(.GET, urlToCall, { (temporaryURL, response) in      if let directoryURL = NSFileManager.defaultManager().URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask)[0] as? NSURL {              fileName = response.suggestedFilename!         finalPath = directoryURL.URLByAppendingPathComponent(fileName!)         return finalPath!     }      return temporaryURL })     .response { (request, response, data, error) in          if error != nil {             println("REQUEST: \(request)")             println("RESPONSE: \(response)")         }           if finalPath != nil {             doSomethingWithTheFile(finalPath!, fileName: fileName!)         }  }