在故障块 AFNetworking 3.0 上获取 responseObject

Posted 2023-02-23

【中文标题】在故障块 AFNetworking 3.0 上获取 responseObject

【英文标题】：get responseObject on failure block AFNetworking 3.0

【发布时间】：2016-01-29 11:21:36

【问题描述】：

如何从 AFNetworking 3.x 中的故障块中获取响应字符串，

在 2.x 版本中，这样做的方法是：

[manager GET:path parameters:parameters success:^(AFHTTPRequestOperation *operation, id responseObject) 
    NSDictionary *dictionary_FetchResult = responseObject;
 failure:^(AFHTTPRequestOperation *operation, NSError *error) 
    NSDictionary *dictionary_FetchResult = operation.responseObject;
];

但在3.x版本中，返回块的参数中没有操作如下图：

[manager POST:path parameters:parameters progress:^(NSProgress * _Nonnull uploadProgress) 
         success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) 
    NSDictionary *dictionary_FetchResult = responseObject;
 failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) 
    NSLog(@"Error: %@", error);
];

所以我希望有人能够做到这一点。

【参考方案1】：

只需在你的失败块中执行此操作：-

 NSString* errResponse = [[NSString alloc] initWithData:(NSData *)error.userInfo[AFNetworkingOperationFailingURLResponseDataErrorKey] encoding:NSUTF8StringEncoding];
NSLog(@"%@",errResponse);

对于 Swift：-

var errResponse: String = String(data: (error.userInfo[AFNetworkingOperationFailingURLResponseDataErrorKey] as! NSData), encoding: NSUTF8StringEncoding)
NSLog("%@", errResponse)

为 Swift 4.1 更新

var errResponse: String = String(data: (error._userInfo![AFNetworkingOperationFailingURLResponseDataErrorKey] as! Data), encoding: String.Encoding.utf8)!
print(errResponse)

【讨论】：

在swift中做什么？

如果我想从 url ios 下载图片怎么办

@Vizllx 如果我使用 error._userInfo 会被 AppStore 拒绝

【参考方案2】：

我找到了一个完美的解决方案。很快

if let userInfo : NSDictionary = error.userInfo as NSDictionary 
     if let innerError : NSError = userInfo.objectForKey("NSUnderlyingError") as? NSError 

         if let innerUserInfo : NSDictionary = innerError.userInfo as NSDictionary 

              if innerUserInfo.objectForKey(AFNetworkingOperationFailingURLResponseDataErrorKey) != nil 
                   let StrError = NSString(data: innerUserInfo.objectForKey(AFNetworkingOperationFailingURLResponseDataErrorKey) as! NSData, encoding: NSUTF8StringEncoding)

                   print(StrError)
              
          else if let errResponse: String = String(data: (error.userInfo[AFNetworkingOperationFailingURLResponseDataErrorKey] as! NSData), encoding: NSUTF8StringEncoding) 
              print(errResponse)
         
     

Objective-C 代码是

    NSDictionary *userinfo1 = [[NSDictionary alloc] initWithDictionary:error.userInfo];

if(userinfo1) 
      NSError *innerError = [userinfo1 valueForKey:@"NSUnderlyingError"];
      if(innerError) 
         NSDictionary *innerUserInfo = [[NSDictionary alloc] initWithDictionary:innerError.userInfo];
         if(innerUserInfo)
         
              if([innerUserInfo objectForKey:AFNetworkingOperationFailingURLResponseDataErrorKey])
              
                   NSString *strError = [[NSString alloc] initWithData:[innerUserInfo objectForKey:AFNetworkingOperationFailingURLResponseDataErrorKey] encoding:NSUTF8StringEncoding];
                            NSLog(@"Error is : %@",strError);
              
         
       else
      
           NSString *errResponse = [[NSString alloc] initWithData:[userinfo1 valueForKey:@"AFNetworkingOperationFailingURLResponseDataErrorKey"] encoding:NSUTF8StringEncoding];

          if(errResponse)
          
               NSLog(@"%@",errResponse);
          
      

【参考方案3】：

- (void)requestWithURL:(NSString *)url parameterDictionary:(NSMutableDictionary *)data  requestType:(NSString *)reqType  handler:(NSObject *)handler selector:(SEL)selector


  // reqType is POST or GET
  // handler would be self if you define selector method in same class
  AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];

  NSMutableURLRequest *req = [[AFJSONRequestSerializer serializer] requestWithMethod:reqType URLString:[NSString stringWithFormat:@"%@",url] parameters:nil error:nil];

req.timeoutInterval= [[[NSUserDefaults standardUserDefaults] valueForKey:@"timeoutInterval"] longValue];
[req setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
[req setValue:@"application/json" forHTTPHeaderField:@"Accept"];
if (data != nil) 
    NSLog(@"Data is not nil");
    NSData *jsonData = [NSJSONSerialization dataWithJSONObject:data options:0 error:&error];
    NSString *jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
    [req setHTTPBody:[jsonString dataUsingEncoding:NSUTF8StringEncoding]];

else
    NSLog(@"Data is nil");


[[manager dataTaskWithRequest:req completionHandler:^(NSURLResponse * _Nonnull response, id  _Nullable responseObject, NSError * _Nullable error) 

    if (!error) 
//            NSLog(@"Reply JSON: %@", responseObject);
        [handler performSelector:selector withObject:responseObject];
        if ([responseObject isKindOfClass:[NSDictionary class]]) 
            //blah blah
        
     else 
        NSLog(@"Error: %@, %@, %@", error, response, responseObject);
        [handler performSelector:selector withObject:responseObject];
    
] resume];

【参考方案4】：

我在GitHub找到了解决方案：

@interface ResponseSerializer : AFJSONResponseSerializer
@end

@implementation ResponseSerializer

- (id)responseObjectForResponse:(NSURLResponse *)response
                       data:(NSData *)data
                      error:(NSError *__autoreleasing *)errorPointer

    id responseObject = [super responseObjectForResponse:response data:data error:errorPointer];
    if (*errorPointer) 
        NSError *error = *errorPointer;
        NSMutableDictionary *userInfo = [error.userInfo mutableCopy];
        userInfo[@"responseObject"] = responseObject;
        *errorPointer = [NSError errorWithDomain:error.domain code:error.code userInfo:[userInfo copy]];
    
    return responseObject;


@end

然后分配给你的经理：

self.manager.responseSerializer = [ResponseSerializer serializer];

【参考方案5】：

let responseData:NSData = (error as NSError).userInfo[AFNetworkingOperationFailingURLResponseDataErrorKey] as! NSData
let s :String = String(data: responseData as Data, encoding: String.Encoding.utf8)!

对于 Swift 3

【参考方案6】：

在这里修复了一些代码，正确处理选项。斯威夫特 3(.1)...

let nserror = error as NSError
if let errordata = nserror.userInfo[AFNetworkingOperationFailingURLResponseDataErrorKey] as? Data 
    if let errorResponse = String(data: errordata, encoding: String.Encoding.utf8) 
        print("errorResponse: \(errorResponse)")