How to call an OAuth 2.0 API from iOS - ios

Question

I am working on Fitbit integration. How can I make request and authorize its OAuth 2.0 API. I checked ASIHTTPRequest but it is not available on ARC. Can I do it with AFNetworking ? I am using Objective-C.

Answer 1

Its done using AFNetworking using AFOAuth2Manager here is the code
In ViewController.m
#define CLIENT_ID #"your client id"
#define CONSUMER_SECRET #"your consumer secret"
Start authorization using safari.
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:#"https://www.fitbit.com/oauth2/authorize?response_type=code&client_id=227FKJ&redirect_uri=http%3A%2F%2Fcallback.com%2Ffitbit&scope=activity%20nutrition%20heartrate%20location%20nutrition%20profile%20settings%20sleep%20social%20weight"]];
get response code from NSUserDefaults
NSString *string = [[NSUserDefaults standardUserDefaults] valueForKey:#"auth_code"];
NSURL *baseURL = [NSURL URLWithString:#"https://www.fitbit.com/oauth2/authorize"];
AFOAuth2Manager *OAuth2Manager =
[[AFOAuth2Manager alloc] initWithBaseURL:baseURL
clientID:CLIENT_ID secret:CONSUMER_SECRET];
NSDictionary *dict = #{#"client_id":CLIENT_ID, #"grant_type":#"authorization_code",#"redirect_uri":#"http://lampdemos.com/fitbit",#"code":string};
[OAuth2Manager authenticateUsingOAuthWithURLString:#"https://api.fitbit.com/oauth2/token" parameters:dict success:^(AFOAuthCredential *credential) {
NSLog(#"Token: %#", credential.accessToken);
AppDelegate *adddel = (AppDelegate *)[[UIApplication sharedApplication]delegate];
adddel.credential = credential;
[self getUserProfileWithCredentials:credential];
} failure:^(NSError *error) {
NSLog(#"Error: %#", error);
}];
call further requests
-(void)getUserProfileWithCredentials:(AFOAuthCredential*)credential{
NSURL *baseURL = [NSURL URLWithString:#"https://www.fitbit.com/oauth2/authorize"];
AFHTTPRequestOperationManager *manager =
[[AFHTTPRequestOperationManager alloc] initWithBaseURL:baseURL];
[manager.requestSerializer setAuthorizationHeaderFieldWithCredential:credential];
manager.responseSerializer = [AFHTTPResponseSerializer serializer];
[manager GET:#"https://api.fitbit.com/1/user/-/profile.json"
parameters:nil
success:^(AFHTTPRequestOperation *operation, id responseObject) {
NSDictionary *dictResponse = [NSJSONSerialization JSONObjectWithData:responseObject options:NSJSONReadingMutableContainers error:nil];
NSDictionary *userDict =[dictResponse valueForKey:#"user"];
NSLog(#"Success: %#", userDict);
NSMutableString *str =[NSMutableString stringWithFormat:#"%#",#""];
for (NSString *key in [userDict allKeys]) {
[str appendFormat:#"%# %#\n",key,[NSString stringWithFormat:#"%#",[userDict valueForKey:key]]];
}
self.profileDetails.text =str;
}
failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(#"Failure: %#", error);
}];
}