Error Code : Error Domain=NSCocoaErrorDomain Code=3840 "JSON text did not start with array or object and option to allow fragments not set."

Question

I hit this error when I using afNetworking PUT method. Please help.

Error Domain=NSCocoaErrorDomain Code=3840 "JSON text did not start with array or object and option to allow fragments not set." UserInfo={NSDebugDescription=JSON text did not start with array or object and option to allow fragments not set.}

Here is my code:-

 NSInteger intUserID = [[prefs stringForKey:@"user_id"] integerValue];
                NSInteger intProdID = [_strProdID integerValue];

                AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
                AFJSONRequestSerializer *serializer = [AFJSONRequestSerializer serializer];
                [serializer setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
                [serializer setValue:@"application/json" forHTTPHeaderField:@"Accept"];
                manager.requestSerializer = serializer;

                NSDictionary *params = @{@"In d":@(1),@"user_id":@(intUserID),@"product_id":@(intProdID)};

                [manager PUT:@"http://api.XXX.com/api/product/wishlist_add" parameters:params success:^(NSURLSessionTask *task, id responseObject) {


                }failure:^(NSURLSessionTask *operation, NSError *error) {
                    NSLog(@"Error Code : %@", error);
                }];

Hitesh Surani Hitesh Surani · Accepted Answer · 2018-05-16T06:11:59

It clearly says you have sent wrong JSON format. Means there is two possibility.

Either you have sent wrong json.
Or your server unable to parse data from your request.

I have already faced the same issue. Please use the below code, I am sure it will work for you.

NSInteger intUserID = [[prefs stringForKey:@"user_id"] integerValue];
NSInteger intProdID = [_strProdID integerValue];
NSDictionary *params = @{@"In d":@(1),@"user_id":@(intUserID),@"product_id":@(intProdID)};

NSError *error;
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:params
    options:NSJSONWritingPrettyPrinted // Pass 0 if you don't care about the readability of the generated string
    error:&error];

if (! jsonData) {
    NSLog(@"Got an error: %@", error);
} else {
    NSString *jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];

    AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
    AFJSONRequestSerializer *serializer = [AFJSONRequestSerializer serializer];
    [serializer setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
    [serializer setValue:@"application/json" forHTTPHeaderField:@"Accept"];
    manager.requestSerializer = serializer;

    [manager PUT:@"http://api.XXX.com/api/product/wishlist_add" parameters:jsonString success:^(NSURLSessionTask *task, id responseObject) {
        }failure:^(NSURLSessionTask *operation, NSError *error) {
        NSLog(@"Error Code : %@", error);
        }];
}

Find reference from here

Update:

It is working fine. Please see below attached screenshot.

Please ensure user_id and product_id value should not be nil

Error Code : Error Domain=NSCocoaErrorDomain Code=3840 "JSON text did not start with array or object and option to allow fragments not set."

2 Answers