AFNetworking 2.0 Get JSON from code 400 in failure block

Question

I\'m using AFHTTPRequestOperationManager for a POST request. Now I\'m deliberately entering incorrect information to handle a 400 erro

Answer 1

Looking at the code for - responseObject, it appears that an HTTP error prevents it from being populated. You can grab the responseData directly and parse it yourself, but I would say this is either a bug or a good enhancement request. (It looks like - responseObject probably should be checking self.responseSerializationError, not self.error, when deciding if it should try to build a response object.)

Answer 2

I also faced same problem in AFNetworking, as instead of using

- (NSURLSessionDataTask *)POST:(NSString *)URLString
                parameters:(id)parameters
                  progress:(void (^)(NSProgress * _Nonnull))uploadProgress
                   success:(void (^)(NSURLSessionDataTask * _Nonnull, id _Nullable))success
                   failure:(void (^)(NSURLSessionDataTask * _Nullable, NSError * _Nonnull))failure

Please try to use that one :-

- (NSURLSessionDataTask *)POST:(NSString *)URLString
                parameters:(id)parameters
 constructingBodyWithBlock:(void (^)(id <AFMultipartFormData> formData))block
                  progress:(nullable void (^)(NSProgress * _Nonnull))uploadProgress
                   success:(void (^)(NSURLSessionDataTask *task, id responseObject))success
                   failure:(void (^)(NSURLSessionDataTask *task, NSError *error))failure

thanks,

Answer 3

You can do either of these solutions

1) Set the acceptableStatusCodes to accept your 400 statusCode, and you handle in the success block

manager.responseSerializer.acceptableStatusCodes = [NSIndexSet indexSetWithIndex:400];

2) Create a custom ResponseSerializer, like this JSONResponseSerializerWithData, to insert the responseObject into the NSError userInfo, and handle in the failure block

Pro tip: AFNetworking is opensource, just take a look at AFHTTPRequestOperation for methods

setCompletionBlockWithSuccess:failure:

responseObject

error

Answer 4

Following code worded for me:

AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
    manager.responseSerializer = [AFJSONResponseSerializer serializer];
    manager.requestSerializer = [AFJSONRequestSerializer serializer];

    [manager.requestSerializer setValue:@"parse-application-id-removed" forHTTPHeaderField:@"X-Parse-Application-Id"];
    [manager.requestSerializer setValue:@"parse-rest-api-key-removed" forHTTPHeaderField:@"X-Parse-REST-API-Key"];
    [manager.requestSerializer setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
    manager.securityPolicy.allowInvalidCertificates = YES;

    NSString *URLString = [NSString stringWithFormat:@"%@/%@", BASE_URL,methodName];



    [manager POST:URLString parameters:requestDict success:^(AFHTTPRequestOperation *operation, id responseObject)
    {
        NSLog(@"JSON: %@", responseObject);

        [myDelegate StopIndicator];
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"Error: %@", error);
        [myDelegate StopIndicator];
    }];