nsurlcache

I'm using NSURLSession to request a JSON resource from an HTTP server. The server uses Cache-Control to limit the time the resource is cached on clients. This works great, but I'd also like to cache a deserialized JSON object in memory as it is accessed quite often, while continuing to leverage the HTTP caching mechanisms built into NSURLSession. I'm thinking I can save a few HTTP response headers: Content-MD5 , Etag , and Last-Modified along with the deserialized JSON object (I'm using those 3 fields since I've noticed not all HTTP servers return Content-MD5 , otherwise that'd be sufficient

Does NSURLCache transparently handle ETags received by server? I mean: does it automatically store ETags for each URL request and then send the appropriate If-None-Match when a request to the same URL is submitted? Or do I have to manage it by myself? yes it does handle it transparently if you set its cache mode: NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:urlString] cachePolicy: NSURLRequestUseProtocolCachePolicy timeoutInterval:60]; note: you cannot see the header in the request at all and if a 304 response is returned by the server you will only

I set my cache as below var cacheSizeMemory = 20 * 1024 * 1024 var cacheSizeDisk = 100 * 1024 * 1024 var sharedCache = NSURLCache(memoryCapacity: cacheSizeMemory, diskCapacity: cacheSizeDisk, diskPath: "SOME_PATH") NSURLCache.setSharedURLCache(sharedCache) Create request with cache policy var request = NSMutableURLRequest(URL: NSURL(string: "\(baseUrl!)\(path)")!, cachePolicy: .ReturnCacheDataElseLoad, timeoutInterval: timeout) Make a request and get a response with following Cache-Control private, max-age=60 Then try to check the cache var cachedResponse = NSURLCache.sharedURLCache()

I have a test app setup and it successfully downloads content from the network even if the user switches apps while a download is in progress. Great, now I have background downloads in place. Now I want to add caching. There is no point to me downloading images more than once, b/c of system design, given an image URL I can tell you the content behind that URL will never change. So, now I want to cache the results of my download using apple's built in in-memory/on-disk cache that I've read so much about (as opposed to me saving the file manually in NSCachesDirectory and then checking there

Goal I'm trying to inject data/response from URLRequest into another URLRequest in my cache. Setup This is just a sample code. It's ready to be dumped into a project. What I'm trying to do is use the response + data retrieved from my landscapeURLString network request...store into my session's cache for my lizardURLString request. import UIKit class ViewController: UIViewController { lazy var defaultSession : URLSession = { let urlCache = URLCache(memoryCapacity: 500 * 1024 * 1024, diskCapacity: 500 * 1024 * 1024, diskPath: "something") let configuration = URLSessionConfiguration.default