[英]Swift 4 - Alamofire - How to disable cache on request
I have this Alamofire request like so:我有这样的 Alamofire 请求:
func loginUser(_ username: String, password: String, completion: @escaping (_ result: Bool) -> Void)
{
let user = username
let password = password
let url = webservice
let credential = URLCredential(user: user, password: password, persistence: .none)
let headers = ["Accept": "application/json;odata=verbose", "Content-type": "application/json;odata=verbose"]
Alamofire.request(url, method: .get, headers: headers).authenticate(usingCredential: credential).responseJSON {
(response) in
print(response.result)
switch response.result {
case .success:
if let value = response.result.value {
completion(true)
}else{
print("There is error in the server response")
completion(false)
}
case .failure (let error):
print("The NTLM request error is: ", error.localizedDescription)
completion(false)
}
}
}
My problem with it is it works when I use invalid credentials after using valid credentials, instead of spitting out an error.我的问题是当我在使用有效凭据后使用无效凭据时它会起作用,而不是吐出错误。 I have been told this maybe a caching issue, so my question is how do I disable cache for this request?有人告诉我这可能是缓存问题,所以我的问题是如何禁用此请求的缓存?
I have tried adding this to the top of my request:我曾尝试将此添加到我的请求的顶部:
URLCache.shared.removeAllCachedResponses()
But that didn't work但这没有用
I also saw this:我也看到了这个:
urlRequest.cachePolicy = .reloadIgnoringCacheData
But I have no idea where to apply it.但我不知道在哪里应用它。
Please help!请帮忙!
UPDATE更新
I have tried the following:我尝试了以下方法:
func loginUser(_ username: String, password: String, completion: @escaping (_ result: Bool) -> Void)
{
let user = username
let password = password
let url = webservice
let credential = URLCredential(user: user, password: password, persistence: .none)
var urlRequest = URLRequest(url: URL(string: url)!)
urlRequest.cachePolicy = NSURLRequest.CachePolicy.reloadIgnoringCacheData
urlRequest.httpMethod = "get"
urlRequest.setValue("application/json;odata=verbose", forHTTPHeaderField: "Content-type")
urlRequest.setValue("application/json;odata=verbose", forHTTPHeaderField: "Accept")
Alamofire.request(urlRequest).authenticate(usingCredential: credential).responseJSON {
(response) in
switch response.result {
case .success:
if let value = response.result.value {
completion(true)
}else{
print("There is error in the server response")
completion(false)
}
case .failure (let error):
print("The NTLM request error is: ", error.localizedDescription)
completion(false)
}
}
}
But that did not work, same result.但这不起作用,结果相同。
You can instantiate a Alamofire.SessionManager
with a specific URLSessionConfiguration
.您可以实例化一个Alamofire.SessionManager
与特定URLSessionConfiguration
。 In the configuration you can set the cachePolicy.在配置中你可以设置cachePolicy。 This could look like this:这可能是这样的:
let configuration = URLSessionConfiguration.default
configuration.requestCachePolicy = .useProtocolCachePolicy // or whatever you want
configuration.urlCache = nil
let mySessionManager = Alamofire.SessionManager(configuration: configuration)
and then use it as follows:然后按如下方式使用它:
mySessionManager.request(urlRequest)
.... mySessionManager.request(urlRequest)
....
Note that you have to use mySessionManager
to do requests instead of using Alamofire.request
if you follow this.请注意,如果您遵循此操作,则必须使用mySessionManager
来执行请求,而不是使用Alamofire.request
。
To make a request using mySessionManager it is basically the same instead of Alamofire.request(urlRequest)
... you use mySessionManager.request(urlRequest)
...要使用 mySessionManager 发出请求,它基本上是相同的,而不是Alamofire.request(urlRequest)
...你使用mySessionManager.request(urlRequest)
...
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