在NSURLSession中使用NSURLProtocol

我的应用程序使用 NSURLConnection 以与服务器通信。我们使用https进行通信。为了在一个地方处理来自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 NSURL连接 。我正在努力 NSURL协议 使用 NSURLS会话 我创建了一个任务并使用 NSURL协议 通过

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];

CustomHTTPSProtocol 这是我的 NSURL协议 类看起来像这样

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

启动加载被调用,并且身份验证质询也被完成,但停止加载之后立即被调用。

一段时间后返回错误代码-999“已取消”。未调用didReceiveData。

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

我错过了什么??我的问题是

1. 正在注册[NSURLProtocol registerClass:[CustomHTTPSProtocol class]];与NSURLConnection配合良好,但如何使用NSURLSession在全球范围内抵抗NSURLProtocol?。

2. 为什么使用URLSession的NSURLProtocol(URL和逻辑与URLConnection相同)中的请求失败,以及如何使NSURLProtocol与URLSession一起工作?。

请帮助我,如果你想了解更多细节,请告诉我。