ios - 刷新令牌的正确方法
问题描述
getUser
在 my中RequestManager class
调用了一个函数VC
。
func getUser(onCompletion: @escaping (_ result: User?, error: String?) -> Void) {
Alamofire.request(Router.getUser).responseJSON { (response) in
// here is the work with response
}
}
如果此请求返回403
,则表示access_token
已过期。我需要刷新令牌并重复来自我的VC
.
现在的问题。
如何刷新令牌并以正确的方式重复请求?
在MyViewController
orgetUser
方法中处理错误和刷新令牌并不是一个好主意,因为我有很多VCs
and request methods
。
我需要类似的东西:VC
调用该方法并获取User
即使令牌已过期并且refreshToken
不能在所有请求方法中。
编辑
refreshToken
方法
func refreshToken(onCompletion: @escaping (_ result: Bool?) -> Void) {
Alamofire.request(Router.refreshToken).responseJSON { (response) in
print(response)
if response.response?.statusCode == 200 {
guard let data = response.data else { return onCompletion(false) }
let token = try? JSONDecoder().decode(Token.self, from: data)
token?.setToken()
onCompletion(true)
} else {
onCompletion(false)
}
}
}
解决方案
为了解决这个问题,我创建了一个类,我们将从中调用每个 API,比如BaseService.swift
.
BaseService.swift :
import Foundation
import Alamofire
import iComponents
struct AlamofireRequestModal {
var method: Alamofire.HTTPMethod
var path: String
var parameters: [String: AnyObject]?
var encoding: ParameterEncoding
var headers: [String: String]?
init() {
method = .get
path = ""
parameters = nil
encoding = JSONEncoding() as ParameterEncoding
headers = ["Content-Type": "application/json",
"X-Requested-With": "XMLHttpRequest",
"Cache-Control": "no-cache"]
}
}
class BaseService: NSObject {
func callWebServiceAlamofire(_ alamoReq: AlamofireRequestModal, success: @escaping ((_ responseObject: AnyObject?) -> Void), failure: @escaping ((_ error: NSError?) -> Void)) {
// Create alamofire request
// "alamoReq" is overridden in services, which will create a request here
let req = Alamofire.request(alamoReq.path, method: alamoReq.method, parameters: alamoReq.parameters, encoding: alamoReq.encoding, headers: alamoReq.headers)
// Call response handler method of alamofire
req.validate(statusCode: 200..<600).responseJSON(completionHandler: { response in
let statusCode = response.response?.statusCode
switch response.result {
case .success(let data):
if statusCode == 200 {
Logs.DLog(object: "\n Success: \(response)")
success(data as AnyObject?)
} else if statusCode == 403 {
// Access token expire
self.requestForGetNewAccessToken(alaomReq: alamoReq, success: success, failure: failure)
} else {
let errorDict: [String: Any] = ((data as? NSDictionary)! as? [String: Any])!
Logs.DLog(object: "\n \(errorDict)")
failure(errorTemp as NSError?)
}
case .failure(let error):
Logs.DLog(object: "\n Failure: \(error.localizedDescription)")
failure(error as NSError?)
}
})
}
}
extension BaseService {
func getAccessToken() -> String {
if let accessToken = UserDefaults.standard.value(forKey: UserDefault.userAccessToken) as? String {
return "Bearer " + accessToken
} else {
return ""
}
}
// MARK: - API CALL
func requestForGetNewAccessToken(alaomReq: AlamofireRequestModal, success: @escaping ((_ responseObject: AnyObject?) -> Void), failure: @escaping ((_ error: NSError?) -> Void) ) {
UserModal().getAccessToken(success: { (responseObj) in
if let accessToken = responseObj?.value(forKey: "accessToken") {
UserDefaults.standard.set(accessToken, forKey: UserDefault.userAccessToken)
}
// override existing alaomReq (updating token in header)
var request: AlamofireRequestModal = alaomReq
request.headers = ["Content-Type": "application/json",
"X-Requested-With": "XMLHttpRequest",
"Cache-Control": "no-cache",
"X-Authorization": self.getAccessToken()]
self.callWebServiceAlamofire(request, success: success, failure: failure)
}, failure: { (_) in
self.requestForGetNewAccessToken(alaomReq: alaomReq, success: success, failure: failure)
})
}
}
为了从此调用调用 API,我们需要创建一个对象AlamofireRequestModal
并用必要的参数覆盖它。
例如,我创建了一个文件APIService.swift
,其中我们有一个getUserProfileData
.
APIService.swift :
import Foundation
let GET_USER_PROFILE_METHOD = "user/profile"
struct BaseURL {
// Local Server
static let urlString: String = "http://192.168.10.236: 8084/"
// QAT Server
// static let urlString: String = "http://192.171.286.74: 8080/"
static let staging: String = BaseURL.urlString + "api/v1/"
}
class APIService: BaseService {
func getUserProfile(success: @escaping ((_ responseObject: AnyObject?) -> Void), failure: @escaping ((_ error: NSError?) -> Void)) {
var request: AlamofireRequestModal = AlamofireRequestModal()
request.method = .get
request.path = BaseURL.staging + GET_USER_PROFILE_METHOD
request.headers = ["Content-Type": "application/json",
"X-Requested-With": "XMLHttpRequest",
"Cache-Control": "no-cache",
"X-Authorization": getAccessToken()]
self.callWebServiceAlamofire(request, success: success, failure: failure)
}
}
解释:
在代码块中:
else if statusCode == 403 {
// Access token expire
self.requestForGetNewAccessToken(alaomReq: alamoReq, success: success, failure: failure)
}
我用请求调用 getNewAccessToken API(在你的情况下说是刷新令牌)(它可以是基于 APIService.swift 的任何请求)。
当我们获得新令牌时,我将其保存为用户默认值,然后我将更新请求(我在 refresh-token API 调用中作为参数获取的请求),并将按原样传递成功和失败块。
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