xcode Alamofire：[结果]：失败：错误域=NSURLErrorDomain 代码=-999“已取消”
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Alamofire: [Result]: FAILURE: Error Domain=NSURLErrorDomain Code=-999 "cancelled"
提问by Sami M'Barek
The service I'm connecting to is using a self signed certificate. For dev purposes I do not want to validate that chain.
我要连接的服务正在使用自签名证书。出于开发目的，我不想验证该链。
Using swift 3 with Alamofire 4. Fixed the ATS accordingly:
在 Alamofire 4 中使用 swift 3。相应地修复了 ATS：
<key>NSAppTransportSecurity</key>
<dict>
<key>NSExceptionDomains</key>
<dict>
<key>url.com</key>
<dict>
<key>NSExceptionAllowsInsecureHTTPLoads</key>
<true/>
<key>NSExceptionRequiresForwardSecrecy</key>
<false/>
<key>NSIncludesSubdomains</key>
<true/>
</dict>
</dict>
</dict>
Code to connect and disable evaluation.
用于连接和禁用评估的代码。
let serverTrustPolicies: [String: ServerTrustPolicy] = [
"example.domain.com": .pinCertificates(
certificates: ServerTrustPolicy.certificates(),
validateCertificateChain: false,
validateHost: true
),
"sub.url.com": .disableEvaluation
]
let sessionManager = Alamofire.SessionManager(
serverTrustPolicyManager: ServerTrustPolicyManager(policies: serverTrustPolicies)
)
let headers = ["Authorization": "Basic /*...*/"]
sessionManager.request("https://sub.url.com/path", headers: headers).responseJSON { response in
print(response.request) // original URL request
print(response.response) // HTTP URL response
print(response.data) // server data
print(response.result) // result of response serialization
debugPrint(response)
if let JSON = response.result.value {
print("JSON: \(JSON)")
}
}
Error log from dumpPrint
来自 dumpPrint 的错误日志
[Result]: FAILURE: Error Domain=NSURLErrorDomain Code=-999 "cancelled" UserInfo={NSErrorFailingURLKey=https://sub.url.com/path, NSLocalizedDescription=cancelled, NSErrorFailingURLStringKey=https://sub.url.com/path}
[结果]: FAILURE: Error Domain=NSURLErrorDomain Code=-999 "cancelled" UserInfo={NSErrorFailingURLKey= https://sub.url.com/path, NSLocalizedDescription=cancelled, NSErrorFailingURLStringKey= https://sub.url.com/路径}
URL has been masked.
网址已被屏蔽。
回答by mixel
To retain SessionManagerinstance you need to capture it in closure passed to responseJSON:
要保留SessionManager实例，您需要在传递给的闭包中捕获它responseJSON：
sessionManager.request("https://sub.url.com/path", headers: headers).responseJSON { response in
let _ = sessionManager // retain
// ...
}
Otherwise sessionManageris deallocated shortly it goes out of scope and any executing requests are cancelled.
否则sessionManager很快就会被释放，它会超出范围并且任何正在执行的请求都会被取消。
回答by Jatin Nandwani
Please add this statement to the end of responseJson block:
请将此语句添加到 responseJson 块的末尾：
manager.session.invalidateAndCancel()
It happens if the object of the manager is not retained till execution of the block completes, so this would ensure its retention.
如果管理器的对象直到块的执行完成才保留，就会发生这种情况，因此这将确保其保留。
Cheers!
干杯!
回答by Rajukumar Patel
self.getSessionManager().request(urlstring, method: methods, parameters: parameters, encoding: JSONEncoding.prettyPrinted, headers: Header).responseJSON(queue: nil, options: JSONSerialization.ReadingOptions.allowFragments) { (responseObject) in ... .... }.session.finishTasksAndInvalidate()
Just put the method of invalidate after task finish, means session.finishTasksAndInvalidate()
把任务完成后invalidate的方法就行了，意思是 session.finishTasksAndInvalidate()
回答by john7ric
Please check in sessiondidReceiveChallenge:delegate implementation of NSURLSession. Chances are NSURLSessionAuthChallengeCancelAuthenticationChallengeis getting executed somewhere.
请检查sessiondidReceiveChallenge:委托执行的NSURLSession。有NSURLSessionAuthChallengeCancelAuthenticationChallenge可能在某处被处决。
回答by Jon Shier
You need to properly manage the lifetime of your SessionManagerinstance. Most commonly this is done by making a singleton instance. Otherwise, when your manager goes out of scope and is deinited, all outstanding requests will be cancelled.
您需要正确管理SessionManager实例的生命周期。最常见的是，这是通过制作单例实例来完成的。否则，当您的经理超出范围并被deinited 时，所有未完成的请求都将被取消。
