AFNetworking NSURLErrorDomain -1005

Question

我在应用程序中使用AFNetworking，然后执行以下POST代码 一切都很好（请求成功与服务器通信），但是当我在一个特定的动作上调用这个方法时，它会传递特定的参数（一个小的NSDictionary，有4个键和值），并且只有这个动作，我才会失败8次阻挡8次，很少我获得成功阻止。 问题变得更加棘手，因为即使我得到了故障块，服务器也会获得传递的参数。

为什么会这样？

  + (void)postToServerWithParameters:(NSDictionary *)parameters
                           andPostPath:(ServerOperation)operation
                           andCallback:(serverResponse)callback
    {
        if (retryTimes <= 0) {
            callback(0, 0, @"error in posting, number of retries is finished", nil);
            retryTimes = 3;
            return;
        }

    NSString *postPath = [self choosePostPathByServerOperation:operation];
    NSURL *url = [NSURL URLWithString:BASE_URL];

    NSLog(@"parameters recieved:\n %@", parameters);
    NSLog(@"base url to post:\n %@", url.absoluteString);


    [clientRequest setObject:parameters];


    AFHTTPClient *client = [[AFHTTPClient alloc] initWithBaseURL:url];
    [client registerHTTPOperationClass:[AFJSONRequestOperation class]];
    [client setParameterEncoding:AFJSONParameterEncoding];
    [client setDefaultHeader:@"Accept" value:@"application/json"];
    [client postPath:postPath
          parameters:[clientRequest dictionaryWithValuesForKeys:nil]

             success:^(AFHTTPRequestOperation *innerOperation, id responseObject) {

                 // init the retry counter
                 retryTimes = 3;

                 NSLog(@"post path: %@ response from AFNetworking: %@",postPath, responseObject);


                 int errorCode = [responseObject[@"mCode"] intValue];
                 BOOL isValidToken = [responseObject[@"mIsValidtoken"] boolValue];
                 NSString *msg = responseObject[@"mMessage"];
                 id object = responseObject[@"mData"];



                 // and if the callback is not nil,
                 // will will send the data to it.
                 if (callback) {
                     callback(errorCode, isValidToken, msg, object);

                 }
             }

             failure:^(AFHTTPRequestOperation *innerOperation, NSError *error) {

                 NSLog(@"AFclient:%@", client);

                 NSLog(@"request faild with AFNetworking\nerror: %@", error);
                 // handle comunication error with retries (till 3)
                 retryTimes--;
                 [self postToServerWithParameters:parameters andPostPath:operation andCallback:callback];

             }
     ];
}

错误是：

error: Error Domain=NSURLErrorDomain Code=-1005 "The network connection was lost." UserInfo=0x13423a80 {NSErrorFailingURLStringKey=http://www.some.url.com/something, NSErrorFailingURLKey=http://www.some.url.com/something, NSLocalizedDescription=The network connection was lost., NSUnderlyingError=0xb9a7030 "The network connection was lost."}

解决

问题出在服务器端。执行特定POST时，服务器在后台线程中执行了一个引发异常的操作。这解释了为什么POST成功并随机失败。