RestKit ios - put - json instead of form encoded

Question

i am writing an ios app that uses restkit to communicate with a web server through Rest with JSON

i am able to use [[RKObjectManager sharedManager] loadObjectsAtResourcePath:path delegate:self] to get object from my web service as JSON, map it to obj-c object, it works fine

now i am trying to use: [[RKObjectManager sharedManager] putObject:obj delegate:self]; and this call sends an object to the web service as form encoded and not JSON

so my question is: how to configure the sharedManager (or the routeur?) to send with content type JSON instead of form encoded.

any code example much appreciated.

Thx!

Answer 1

The easiest way is to simply set the property when you initialize the object manager, like so:

RKObjectManager* objectManager = [RKObjectManager objectManagerWithBaseURL:@"http://url.com"];
objectManager.serializationMIMEType = RKMIMETypeJSON;

Answer 2

Evan is correct, but I've had to also make sure I am sending a JSON string, because I had a nested NSDictionay.

If you have a dictionary you want to send as a JSON string, here's how you can do it:

// create a JSON string from your NSDictionary
NSError *error; 
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dict 
                                                   options:NSJSONWritingPrettyPrinted // Pass 0 if you don't care about the readability of the generated string
                                                     error:&error];
NSString *jsonString = [[NSString alloc] init];
if (!jsonData) {
    NSLog(@"Got an error: %@", error);
} else {
    jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
}

// make the post using the objectManager if you want to map the response to a model
RKObjectManager* objectManager = [RKObjectManager sharedManager];  
[objectManager loadObjectsAtResourcePath:@"/api/" delegate:self block:^(RKObjectLoader* loader) {
    loader.serializationMIMEType = RKMIMETypeJSON; // We want to send this request as JSON
    loader.objectMapping = [objectManager.mappingProvider objectMappingForClass:[Plan class]];
    loader.resourcePath = @"/api/";
    loader.method = RKRequestMethodPOST;
    loader.params = [RKRequestSerialization serializationWithData:[jsonString dataUsingEncoding:NSUTF8StringEncoding] MIMEType:RKMIMETypeJSON];
}];

Answer 3

Okay just found how to do it:

subclass RKRouter.h or just change in RKDynamicRouter.m

return [object propertiesForSerialization];

to

[RKJSONSerialization JSONSerializationWithObject:[object propertiesForSerialization]];

and RestKit generate JSON for putObject call

Answer 4

Create an Object Manager and set the property for matching the header in JSON format

RKObjectManager *objectManager = [RKObjectManager managerWithBaseURL:[NSURL URLWithString:@"http://mobile.com"]];
[objectManager addResponseDescriptorsFromArray:@[responseDescriptor]];

objectManager.requestSerializationMIMEType = RKMIMETypeJSON;