Alamofire 5 token 刷新以及请求重试Alamofire是可用于iOS和Mac项目的流行框架。这里来讲一下

Alamofire是可用于iOS和Mac项目的流行框架。这里来讲一下如何使用Alamofire实现token的签名和在token过期刷新token后进行网络请求的重试。

创建RequestAdapter和RequestRetrier

final class RequestInterceptor: Alamofire.RequestInterceptor {

func adapt(_ urlRequest: URLRequest, for session: Session, completion: @escaping (Result<URLRequest, Error>) -> Void) {
    guard urlRequest.url?.absoluteString.hasPrefix(BaseURL) == true else {
        /// 如果这个请求不需要签名则直接进行请求
        return completion(.success(urlRequest))
    }
    var urlRequest = urlRequest

    /// 使用access token来进行签名
    urlRequest.setValue(你缓存的token, forHTTPHeaderField: "Authorization")

    urlRequest.setValue("在这里加一些服务器需要收集的设备信息的键值对", forHTTPHeaderField: "User-Agent")
    urlRequest.setValue("application/json", forHTTPHeaderField: "Content-Type")

    completion(.success(urlRequest))
}

func retry(_ request: Request, for session: Session, dueTo error: Error, completion: @escaping (RetryResult) -> Void) {
    guard let response = request.task?.response as? HTTPURLResponse, response.statusCode == 401 else {
        /// 这个请求没有因为401token过期
        /// 则进行原始请求，不重试
        return completion(.doNotRetryWithError(error))
    }
    /// 401token过期，则调用刷新请求的方法
    HpptClient.share.refreshToken { (complete) in
        if complete {
            /// 刷新token成功后过1秒进行重试请求
            completion(.retryWithDelay(1))
        } else {
            /// 刷新token失败放弃重试
            return completion(.doNotRetryWithError(error))
        }
    }
}

}

创建自定义Session

class SessionManager: NSObject { static let share: SessionManager = SessionManager()

var sessionManager: Session!
fileprivate let configuration = URLSessionConfiguration.default

override init() {
    super.init()
    configSession()
}

final func configSession() {
    configuration.timeoutIntervalForRequest = 15    // 15s超时
    sessionManager = Session(configuration: configuration, interceptor: RequestInterceptor())
}

}

使用配置好的Session进行网络请求

LDSessionManager.share.sessionManager.request("请求地址", method: 方法类型, parameters: 请求参数, encoding: JSONEncoding.default) .validate(statusCode: 200..<300) .validate(contentType: ["application/json"]) .responseData { response in switch response.result { case let .success(value): let dataJson = JSON(value) printD("response = (dataJson)") case let .failure(error): printD(error) } }

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