如何读取 HEAD 请求的 http 状态码

Question

我正在使用 AFNetworking 4.3.1 和 Http 方法 GET 和 HEAD 请求 API。它可以 return 不同的 http 状态代码（100、200、402、..）

我的 get 函数请求工作正常。

-(void) getApiV2:(NSString *)url
      parameters:(NSDictionary *)param
         success:(successBlock)mSuccessBlock
         failure:(failureBlock)mfailureBlock{

    NSMutableDictionary *httpHeader =[NSMutableDictionary dictionary];
    if(TOKEN !=nil){
        [httpHeader setObject:TOKEN forKey:@"Token"];
    }

    AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
    [manager
        GET:url
        parameters:param
        headers:httpHeader
        progress:nil
        success: ^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject){
            int statusCode = [[responseObject objectForKey:@"code"] intValue];
            NSArray *data = [responseObject objectForKey:@"data"];
            BLOCK_SAFE_RUN(mSuccessBlock,data,statusCode);
        }
        failure: ^(NSURLSessionDataTask * dataTask, NSError * error){
            BLOCK_SAFE_RUN(mfailureBlock,error);
        }
    ];
};

但是我的 head 函数抛出错误。

-(void) head:(NSString *)url success:(successBlock)mSuccessBlock failure:(failureBlock)mfailureBlock{

    NSMutableDictionary *httpHeader =[NSMutableDictionary dictionary];
    if(TOKEN !=nil){
        [httpHeader setObject:TOKEN forKey:@"Token"];
    }

    AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
    [manager
        HEAD:url
        parameters:nil
        headers:httpHeader
        success: ^(id _Nullable responseObject){
            int statusCode = [[responseObject objectForKey:@"code"] intValue];
            BLOCK_SAFE_RUN(mSuccessBlock,responseObject,statusCode);
        }
        failure: ^(NSURLSessionDataTask * dataTask, NSError * error){
            BLOCK_SAFE_RUN(mfailureBlock,error);
        }
    ];
};

在运行的时候，我在int statusCode = [[responseObject objectForKey:@"code"] intValue];

行出现了这个错误

[__NSCFLocalDataTask objectForKey:]: unrecognized selector sent to instance 0x110f88860

服务器正确处理请求并完成工作。

我尝试其他语法：

int statusCode = (int) [responseObject statusCode];

'NSInvalidArgumentException', reason: '-[__NSCFLocalDataTask statusCode]: unrecognized selector sent to instance 0x145731af0'

来自

            NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *)responseObject;
            int statusCode = (int) httpResponse.statusCode;

[__NSCFLocalDataTask statusCode]: unrecognized selector sent to instance 0x129665ed0

使用 AFNetworking 获取 HEAD 请求的 http 状态代码的好方法是什么？

Answer 1

根据@Larme 的建议并由 source code of AFNetworking、HEAD:parameters:headers:success:failure: return a NSURLSessionDataTask

确认

所以我需要检索 NSHTTPURLResponse 才能获得 statusCode。

NSURLSessionTask *task = (NSURLSessionTask *)responseObject;
NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *)[task response];
int statusCode = (int) httpResponse.statusCode;
NSLog(@"Status code: %d", statusCode);

如何读取 HEAD 请求的 http 状态码

How to read http status code for HEAD request

objective-c

ios

afnetworking