无法使用AFNetworking 3进行JSON和XML响应的单例 [英] Cannot make singleton for JSON and XML response using AFNetworking 3

问题描述

我正在为网络建立JSON和XML响应

Hi I'm Making a singleton for networking for JSON and XML response

我的ApiClient.h

my ApiClient.h

+ (ApiClient *)sharedInstance;

-(instancetype)initWithBaseURL:(NSURL *)url sessionConfiguration:(NSURLSessionConfiguration *)configuration;

我的ApiClient.m

My ApiClient.m

+ (ApiClient *)sharedInstance {
    static ApiClient *sharedInstance = nil;

    static dispatch_once_t oncePredicate;
    dispatch_once(&oncePredicate, ^{
        NSURLSessionConfiguration *sessionConfiguration = [NSURLSessionConfiguration defaultSessionConfiguration];
        sharedInstance = [[self alloc] initWithBaseURL:[NSURL URLWithString:SINGPOST_BASE_URL] sessionConfiguration:sessionConfiguration];

        [sharedInstance setDataTaskWillCacheResponseBlock:^NSCachedURLResponse *(NSURLSession *session, NSURLSessionDataTask *dataTask, NSCachedURLResponse *proposedResponse)
         {
             NSHTTPURLResponse *resp = (NSHTTPURLResponse*)proposedResponse.response;
             NSMutableDictionary *newHeaders = [[resp allHeaderFields] mutableCopy];
             if (newHeaders[@"Cache-Control"] == nil) {
                 newHeaders[@"Cache-Control"] = @"max-age=120, public";
             }
             NSURLResponse *response2 = [[NSHTTPURLResponse alloc] initWithURL:resp.URL statusCode:resp.statusCode HTTPVersion:nil headerFields:newHeaders];
             NSCachedURLResponse *cachedResponse2 = [[NSCachedURLResponse alloc] initWithResponse:response2
                                                                                             data:[proposedResponse data]
                                                                                         userInfo:[proposedResponse userInfo]
                                                                                    storagePolicy:NSURLCacheStorageAllowed];
             return cachedResponse2;
         }]; 
    });
    return sharedInstance;
}
-(instancetype)initWithBaseURL:(NSURL *)url sessionConfiguration:(NSURLSessionConfiguration *)configuration {
    self = [super initWithBaseURL:url sessionConfiguration:configuration];
        if (self) {
        }
    return self;
}

问题是单例无法同时处理XML和JSON响应.它可以成功解析JSON和XML一次.但是当再次调用以再次解析时(成功解析XML之后)，结果将无法正确解析(给出十六进制字符串响应)

The problem is the singleton cannot handle both XML and JSON response. It can successfully parse the JSON and XML for 1 time. But when call again to parse again) (after successfully parse XML) result will not be parse properly (give hex string response)

我的JSON阻止请求

- (void)sendJSONRequest:(NSMutableURLRequest *)request
                success:(void (^)(NSURLResponse *response, id responseObject))success
                failure:(void (^)(NSError *error))failure {

    self.responseSerializer.acceptableContentTypes = [AFHTTPResponseSerializer serializer].acceptableContentTypes;

    NSURLSessionDataTask *dataTask = [self dataTaskWithRequest:request completionHandler:^(NSURLResponse *response, id responseObject, NSError *error) {
        if (error) {
            NSLog(@"Error URL: %@",request.URL.absoluteString);
            NSLog(@"Error: %@", error);
            failure(error);
        } else {
            NSDictionary *jsonDict  = (NSDictionary *) responseObject;
            success(response,jsonDict);
            NSLog(@"Success URL: %@",request.URL.absoluteString);
            NSLog(@"Success %@",jsonDict);
        }
    }];
    [dataTask resume];

}

我的XML阻止请求

- (void)sendXMLRequest:(NSMutableURLRequest *)request
               success:(void (^)(NSURLResponse *response, RXMLElement *responseObject))success
               failure:(void (^)(NSError *error))failure {

    self.requestSerializer = [AFHTTPRequestSerializer serializer];
    self.responseSerializer = [AFHTTPResponseSerializer serializer];
    [self.responseSerializer.acceptableContentTypes setByAddingObject:@"application/xml"];
    NSURLSessionDataTask *dataTask = [self dataTaskWithRequest:request completionHandler:^(NSURLResponse *response, id responseObject, NSError *error) {
        if (error) {
            NSLog(@"Error URL: %@",request.URL.absoluteString);
            NSLog(@"Error: %@", error);
            failure(error);
        } else {
            RXMLElement *rootXml = [RXMLElement elementFromXMLData:responseObject];
            success(response, rootXml);
            NSLog(@"Success URL: %@",request.URL.absoluteString);
            NSLog(@"Success %@",rootXml);

        }
    }];
    [dataTask resume];
}

我的十六进制字符串失败共鸣:

My hex string fail resonse:

无论如何要使单例正常工作，还是需要为JSON和XML响应设置2个单例?任何帮助都将不胜感激.谢谢！

Anyway to make the singleton work properly or I need to make 2 singleton for JSON and XML response? Any help is much appreciate. Thanks!

推荐答案

您的错误可能告诉您，它期望Content-Type为application/xml，而您可能拥有application/json.很难说出来，因为您没有分享完整的错误，但是很可能是这样的.

Your error is likely telling you that it was expecting a Content-Type of application/xml, and you may of had an application/json. It's hard to tell because you didn't share the full error, but it's likely something like that.

有两种逻辑方法.要么

1. 只有一个AFHTTPSessionManager接受XML和JSON.因此，使用AFHTTPResponseSerializer的responseSerializer以及application/xml和application/json的acceptableContentTypes(或者两个Web服务返回的特定特定Content-Type)，然后在收到NSData响应对象时，可以根据需要解析XML或JSON.

1. Have single AFHTTPSessionManager accept both XML and JSON. So, with a responseSerializer of AFHTTPResponseSerializer and an acceptableContentTypes of both application/xml and application/json (or whatever specific Content-Type your two web services return), and then when you receive the NSData response object, either parse the XML or JSON as appropriate.

具有单独的AFHTTPSessionManager对象，一个用于XML(AFXMLResponseSerializer的responseSerializer)和一个用于JSON(AFJSONResponseSerializer的responseSerializer)的对象.请注意，如果您这样做，则完全不需要调整acceptableContentTypes.

Have separate AFHTTPSessionManager objects, one for XML (with responseSerializer of AFXMLResponseSerializer) and one for JSON (with responseSerializer of AFJSONResponseSerializer). Note, if you do this, you don't have to adjust acceptableContentTypes at all.

这篇关于无法使用AFNetworking 3进行JSON和XML响应的单例的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！