关于ios：将NSURLProtocol与NSURLSession一起使用

Using NSURLProtocol with NSURLSession

我的应用程序使用NSURLConnection与服务器通信。我们使用https进行通信。为了在一个地方处理所有请求的身份验证，我使用了NSURLProtocol并在该类的委托中处理身份验证。现在，我决定使用NSURLSession而不是NSURLConnection。我正在尝试让NSURLProtocol与NSURLSession一起工作
我创建了一个任务，并由

使用了NSURLProtocol

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NSMutableURLRequest *sampleRequest = [[NSMutableURLRequest alloc]initWithURL:someURL];
NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
configuration.protocolClasses = @[[CustomHTTPSProtocol class]];
NSURLSession *session = [NSURLSession sessionWithConfiguration:configuration delegate:self delegateQueue:nil];
NSURLSessionDataTask *task = [session dataTaskWithRequest:checkInInfoRequest];
[task resume];

我的NSURLProtocol类的

CustomHTTPSProtocol看起来像这样

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static NSString * const CustomHTTPSProtocolHandledKey = @"CustomHTTPSProtocolHandledKey";

@interface CustomHTTPSProtocol () <NSURLSessionDataDelegate,NSURLSessionTaskDelegate,NSURLSessionDelegate>

@property (nonatomic, strong) NSURLSessionDataTask *connection;
@property (nonatomic, strong) NSMutableData *mutableData;

@end

@implementation CustomHTTPSProtocol

+ (BOOL)canInitWithRequest:(NSURLRequest *)request {
if ([NSURLProtocol propertyForKey:CustomHTTPSProtocolHandledKey inRequest:request]) {
return NO;
}
return [[[[request URL]scheme]lowercaseString]isEqualToString:@"https"];
}

+ (NSURLRequest *)canonicalRequestForRequest:(NSURLRequest *)request {
return request;
}

- (void) startLoading {
NSMutableURLRequest *newRequest = [self.request mutableCopy];
[NSURLProtocol setProperty:@YES forKey:CustomHTTPSProtocolHandledKey inRequest:newRequest];

NSURLSession*session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration] delegate:self delegateQueue:nil];
self.connection = [session dataTaskWithRequest:newRequest];
[self.connection resume];
self.mutableData = [[NSMutableData alloc] init];
}

- (void) stopLoading {
[self.connection cancel];
self.mutableData = nil;
}

-(void)URLSession:(NSURLSession *)session didReceiveChallenge:(NSURLAuthenticationChallenge *)challenge completionHandler:(void (^)(NSURLSessionAuthChallengeDisposition disposition, NSURLCredential *credential))completionHandler {
NSLog(@"challenge..%@",challenge.protectionSpace.authenticationMethod);
if ([challenge.protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticationMethodServerTrust]) {
[challenge.sender useCredential:[NSURLCredential credentialForTrust:challenge.protectionSpace.serverTrust] forAuthenticationChallenge:challenge];
}
else {
[challenge.sender continueWithoutCredentialForAuthenticationChallenge:challenge];
}
}

- (void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveData:(NSData *)data {
[self.client URLProtocol:self didLoadData:data];
NSLog(@"data ...%@ ",data); //handle data here
[self.mutableData appendData:data];
}

- (void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didCompleteWithError:(NSError *)error {
if (!error) {
[self.client URLProtocolDidFinishLoading:self];
}
else {
NSLog(@"error ...%@ ",error);
[self.client URLProtocol:self didFailWithError:error];
}
}

@end

调用开始加载，也执行身份验证质询，但此后立即调用停止加载。

Error code -999"Cancelled" is returned after some time. didReceiveData is not called.

Note:NSURLProtocol and the Authentication Process worked fine with NSURLConnection.

我想念什么？我的问题是

Registering [NSURLProtocol registerClass:[CustomHTTPSProtocol class]]; worked fine with NSURLConnection but how to Resister for NSURLProtocol Globally with NSURLSession ?.

Why are the requests getting failed in NSURLProtocol(same URL and logic worked withURLConnection) with URLSession and how to get NSURLProtocol working with URLSession ?.

请帮助我，如果您需要更多详细信息，请告诉我。