jsonObjectWithData causing memory crash? - ios

Question

I am getting response data from a server using AFHTTPRequestOperation in AfNetworking 2.0
NSURLRequest *request = [[ServiceHelper instance] getRequestData:postDict :[ServicesConfiguration GET_DOCUMENTS_URL]];
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
manager.requestSerializer = [AFHTTPRequestSerializer serializer];
manager.responseSerializer = [AFHTTPResponseSerializer serializer];
AFHTTPRequestOperation *requestOperation = [manager HTTPRequestOperationWithRequest:request success:^(AFHTTPRequestOperation *operation, id responseObject) {
NSDictionary *returnData = [[ServiceHelper instance] getReturnDictionary:responseObject];
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(#"Error: %#", error);
}];
The getReturnDictionary method called on the responseObject is a simple JSON Serializer..
- (NSDictionary *) getReturnDictionary : (NSData *) data {
if ( data == nil ) {
return [NSDictionary dictionary];
}
NSError * error = nil;
NSDictionary *jsonDict = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
if (error != nil) {
NSLog(#"Error parsing JSON: %#",error);
return [NSDictionary dictionary];
}
else
return jsonDict;
}
This works fine for smaller amounts of data. But when the response object is like 100mb, the app hangs on
NSDictionary *jsonDict = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
And then about 15 seconds later, the app crashes due to a memory error.
I think its pretty self explanatory that its the massive size of the data, but shouldn't it be able to handle it?
If I get the data directly from an [ NSURLConnection sendSynchronousRequest:]; - it works without hanging or crashing. As this is what I was doing originally - but switching to AFNetworking to display a progress bar more easily.
Any thoughts or tips are appreciated.

Answer 1

Update:
So You have 2 options to solve this:
Blockquote
Use NSJSONReadingMutableContainers as options
Blockquote
If previous does not work you are facing a known issue like below:
iOS Download & Parsing Large JSON responses is causing CFData (store) leaks
So now you have 2 options:
Use native JSON Serialization
First downloading the JSON files to disk without using AFNetworking and than parse.