Alamofire，会话管理器限制重试计数
Alamofire，会话管理器限制重试计数
提问于 2016-09-26 22:17:26
我正在使用Alamofire的SessionManager向我的API服务发出请求。
有没有办法限制阿拉莫火的重试次数？
我正在使用新的RequestAdapter和RequestTrier协议在Alamofire v4中提供重试机制。
我想限制重试最多5次。如果在5次之后重试，一个新的请求不应该被完成。
class VMRetrier: RequestAdapter, RequestRetrier {
public func adapt(_ urlRequest: URLRequest) throws -> URLRequest {
return urlRequest;
}
func should(_ manager: SessionManager, retry request: Request, with error: Error, completion: @escaping RequestRetryCompletion) {
if let response = request.task?.response as? HTTPURLResponse, response.statusCode == 401 {
VMLogger.shared.debug(message: "Trying to get a token")
let _ = AuthService.shared.login(email: "a@a.com", password: "test34")
.then(execute: { (response) in
completion(true, 0.0)
})
}
else {
completion(false, 0.0)
}
} }用法：
internal let sessionManager = SessionManager()
override init() {
super.init()
sessionManager.adapter = VMRequestAdapter()
sessionManager.retrier = VMRetrier()
}更新在alamofire中有一个新的提交以提供重试计数选项.阿拉莫火犯
回答 1
Stack Overflow用户
发布于 2016-10-08 10:35:57
我已经用Alamofire的RequestRetrier协议解决了这个问题：
class Retrier: RequestRetrier {
var defaultRetryCount = 4
private var requestsAndRetryCounts: [(Request, Int)] = []
private var lock = NSLock()
private func index(request: Request) -> Int? {
return requestsAndRetryCounts.index(where: { $0.0 === request })
}
func addRetryInfo(request: Request, retryCount: Int? = nil) {
lock.lock() ; defer { lock.unlock() }
guard index(request: request) == nil else { print("ERROR addRetryInfo called for already tracked request"); return }
requestsAndRetryCounts.append((request, retryCount ?? defaultRetryCount))
}
func deleteRetryInfo(request: Request) {
lock.lock() ; defer { lock.unlock() }
guard let index = index(request: request) else { print("ERROR deleteRetryInfo called for not tracked request"); return }
requestsAndRetryCounts.remove(at: index)
}
func should(_ manager: SessionManager, retry request: Request, with error: Error, completion: @escaping RequestRetryCompletion){
lock.lock() ; defer { lock.unlock() }
guard let index = index(request: request) else { completion(false, 0); return }
let (request, retryCount) = requestsAndRetryCounts[index]
if retryCount == 0 {
completion(false, 0)
} else {
requestsAndRetryCounts[index] = (request, retryCount - 1)
completion(true, 0.5)
}
}
}应以这种方式使用：
let manager = SessionManager()
let retrier = Retrier()
// ...
manager.retrier = retrier然后
let request = manager.request(urlString, method: method, parameters: parameters, encoding: JSONEncoding.default, headers: headers)
retrier.addRetryInfo(request: request)
request.response { r in
self.retrier.deleteRetryInfo(request: request)
}.responseApiJSON { (r: DataResponse<JSONObject>) in
// You code here
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/39713280
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