Send Nested JSON using AFNetworking

Question

To send registration data to server, I am using JSON is in following form:

{"regData": {
 "City":"Some City",
 "Country":"Some Country",
 "Email_Id":"[email protected]",
 "MobileNumber":"+00xxxxxxxxxx",
 "UserName":"Name Of user"
 }
}

Here is how am sending.

 NSURL * url = [[NSURL alloc] initWithString:registerUrlString];
            AFHTTPClient * httpClient = [[AFHTTPClient alloc] initWithBaseURL:url];
            httpClient.parameterEncoding = AFJSONParameterEncoding;
            [[AFNetworkActivityIndicatorManager sharedManager] setEnabled:YES];
            NSDictionary * params = @{@"regData": @{
                                              @"City": self.cityField.text,
                                              @"Country": self.countryField.text,
                                              @"Email_Id": self.emailField.text,
                                              @"MobileNumber": self.numberField.text,
                                              @"UserName": self.userName.text,
                                              }
                                      };

            NSMutableURLRequest * request = [httpClient requestWithMethod:@"POST" path:registerUrlString parameters:params];
            AFHTTPRequestOperation * operation = [AFJSONRequestOperation JSONRequestOperationWithRequest:request success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON) {
                NSLog(@"Success: %@", JSON);

            } failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, id JSON) {
            NSLog(@"Error: %@", [error debugDescription]);
            }];

            [operation start];

But unfortunately I am getting this error:

Error Domain=NSCocoaErrorDomain Code=3840 "The operation couldn’t be completed. (Cocoa error 3840.)" (JSON text did not start with array or object and option to allow fragments not set.) UserInfo=0x94b3c30 {NSDebugDescription=JSON text did not start with array or object and option to allow fragments not set.}

your method is not generic. Check the proper method here. Less error-prone and maintainable — Alphapico
– Alphapico, Commented May 28, 2013 at 9:58

mattt · Accepted Answer · 2013-05-23 16:46:12Z

31

Your request is fine. The error Error Domain=NSCocoaErrorDomain Code=3840 is being returned because your server is responding with invalid JSON object. NSLog operation.responseString to see what's being sent back.

answered May 23, 2013 at 16:46

mattt

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6 Comments

Homam Over a year ago

Thanks, mattt! I had already fixed this issue. The problem was as you mentioned. I was getting string from server rather a json.

Hemang Over a year ago

@mattt, I subclassed, AFHTTPSessionManager where can I find operation.responseString ?

Akhtar Over a year ago

@Hemang did you find any solution related to "Error Domain=NSCocoaErrorDomain Code=3840" ?

Hemang Over a year ago

Not exactly, but you can ask to your API developer to log the things, so you could check it in a browser. Maybe this is crucial but I guess for my case this did the trick :) @Akhtar

Akhtar Over a year ago

Thanks you very much for the feedback @Hemang :) The problem is in the WEB API they are not sending the proper jsson string. I just log the response data and get the error.Here is the code: failure:^(AFHTTPRequestOperation *operation, NSError *error) { NSLog(@"Response data: %@",operation.responseData); NSLog(@"Response String: %@",operation.responseString); NSLog(@"Error: %@", error); [self errorResponseHandlingWithResponseDict:error.userInfo WithTag:tag]; }

|

Lithu T.V · Accepted Answer · 2013-05-10 06:58:35Z

2

Try this to get the actual error

NSLog(@"Error: %@", [error debugDescription]);
NSLog(@"Error: %@", [error localizedDescription]);

answered May 10, 2013 at 6:58

Lithu T.V

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1 Comment

Homam Over a year ago

I am getting this error: Error Domain=NSCocoaErrorDomain Code=3840 "The operation couldn’t be completed. (Cocoa error 3840.)" (JSON text did not start with array or object and option to allow fragments not set.) UserInfo=0x94b3c30 {NSDebugDescription=JSON text did not start with array or object and option to allow fragments not set.}

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