Handling response with raw data using RestKit - objective-c

Question

I am using RestKit 0.23.3.
For a particular path pattern (say download_data/:dataId):
I can send a request via RestKit without any problem,
I expect a response with arbitrary Content Type (image/png, text/plain, text/xml,... or even application/json),
If 2xx status code is returned by the server, I want to receive the body of HTTP response as NSData instance (regardless of Content Type) in the success handler block.
Is this possible (and how) using RestKit?
Thanks.

Answer 1

With new restkit 0.20.3 you can execute your rest web-service like:
[[AppDelegate appDelegate].rkomForProbeList getObjectsAtPath:[NSString stringWithFormat:kResource_Probe,[[NSUserDefaults standardUserDefaults] valueForKey:kNS_DF_AccessRef]] parameters:nil success:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult) {
NSLog(#"%#",operation.HTTPRequestOperation.responseString);
// if raw data
NSDictionary *jsonObject = [NSJSONSerialization JSONObjectWithData:[operation.HTTPRequestOperation.responseString dataUsingEncoding:NSUTF8StringEncoding] options:0 error:NULL];
// if mapped
arrayForProbe = [[NSMutableArray alloc] initWithArray:mappingResult.array];
} failure:^(RKObjectRequestOperation *operation, NSError *error) {
NSLog(#"%#",operation.HTTPRequestOperation.responseString);
NSDictionary *jsonObject = [NSJSONSerialization JSONObjectWithData:[,operation.HTTPRequestOperation.responseString dataUsingEncoding:NSUTF8StringEncoding] options:0 error:NULL];
NSLog(#"%#",operation.HTTPRequestOperation.response.statusCode);
NSLog(#"%#",error.description);
[self hideViewContentAsProbesNotAvailable];
}];
By mapping you will get your object directly from mappingarray. For parsing raw data you have get json object from response string.
rkomForProbeList is your RKObjectManager's instance.
kResource_Probe is resource path. Like if base URL is http://www.hi.com/ and your rest api required http://www.hi.com/login then "login" will be your resource path.

Answer 2

I'm not familiar with RESTKit, but anyway maybe it will help you.
I suggest you to use NSURLSession for low level requests like this, as RESTKit adds a lot of abstractions, which is unnecessary for this task.
[[[NSURLSession sharedSession] dataTaskWithURL:[NSURL URLWithString:#"http://yourSite.com"]
completionHandler:^(NSData *data, NSURLResponse *response, NSError *error)
{
if ([response isKindOfClass:[NSHTTPURLResponse class]]) {
NSInteger statusCode = [(NSHTTPURLResponse *)response statusCode];
if (statusCode >= 200 && statusCode < 300) {
// that's OK
} else {
// something wrong
}
}
}] resume];