How to disable caching in Alamofire

Question

When I send a GET request twice with Alamofire I get the same response but I'm expecting a different one. I was wondering if it was because of the cache, and if so I'd like to know how to disable it.

Answer 1

You have a few options.

Disabling the URLCache Completely

let manager: Manager = {
    let configuration = NSURLSessionConfiguration.defaultSessionConfiguration()
    configuration.URLCache = nil
    return Manager(configuration: configuration)
}()

Configuring the Request Cache Policy

let manager: Manager = {
    let configuration = NSURLSessionConfiguration.defaultSessionConfiguration()
    configuration.requestCachePolicy = .ReloadIgnoringLocalCacheData
    return Manager(configuration: configuration)
}()

Both approaches should do the trick for you. For more information, I'd suggest reading through the documentation for NSURLSessionConfiguration and NSURLCache. Another great reference is NSHipster article on NSURLCache.

Answer 2

This is what worked for me.

NSURLCache.sharedURLCache().removeAllCachedResponses()

Swift 3

URLCache.shared.removeAllCachedResponses()

Answer 3

swift 3, alamofire 4

My solution was:

creating extension for Alamofire:

extension Alamofire.SessionManager{
    @discardableResult
    open func requestWithoutCache(
        _ url: URLConvertible,
        method: HTTPMethod = .get,
        parameters: Parameters? = nil,
        encoding: ParameterEncoding = URLEncoding.default,
        headers: HTTPHeaders? = nil)// also you can add URLRequest.CachePolicy here as parameter
        -> DataRequest
    {
        do {
            var urlRequest = try URLRequest(url: url, method: method, headers: headers)
            urlRequest.cachePolicy = .reloadIgnoringCacheData // <<== Cache disabled
            let encodedURLRequest = try encoding.encode(urlRequest, with: parameters)
            return request(encodedURLRequest)
        } catch {
            // TODO: find a better way to handle error
            print(error)
            return request(URLRequest(url: URL(string: "http://example.com/wrong_request")!))
        }
    }
}

and using it:

Alamofire.SessionManager.default
            .requestWithoutCache("https://google.com/").response { response in
                print("Request: \(response.request)")
                print("Response: \(response.response)")
                print("Error: \(response.error)")
        }