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The Anatomy of AppsHow iPhone, Android & Facebook Apps Consume APIsEd Anuff@edanuffSam Ramji@sramjiBrian Mulloy@landlessness Apigee @apigee

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groups.google.com/group/api-craft

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youtube.com/apigee

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New! IRC Channel #api-craft

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App App App World of API Internal App APIUser Store Developer APIs Team Systems

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Dogs API/dogs/ownersAuthorizationOAuth 2.0RESTful API Design - Second Editionhttp://www.youtube.com/watch?v=QpAhXa12xvU

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Build an iPhone App, an Android App and aFacebook Web App**Ruby on Rails app hosted on Herokuhttp://devcenter.heroku.com/articles/facebook

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App App App World of API Internal App APIUser Store Developer APIs Team Systems

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Start with a basic HTTP request

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AndroidHttpClient client = new DefaultHttpClient();HttpGet httpGet = new HttpGet("http://api.apizoo.com/v1/dogs");HttpResponse response = client.execute(httpGet);iOSNSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://api.apizoo.com/v1/dogs"]];NSData *response = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];Ruby on Railsrequire net/httpresponse = Net::HTTP.get(‘api.apizoo.com/v1’, ‘/dogs’)

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Parse the data

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AndroidJSONObject dogs = new JSONObject(response);iOSimport "JSONKit.h"NSDictionary *dogs = [response objectFromData];Ruby on Railsrequire yajlparser = Yajl::Parser.newdogs = parser.parse(response) # returns a hash

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Resource Object Mapping

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RouteMapUse

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Android Spring MobileRouterequestEntity = new HttpEntity<Object>(requestHeaders);ResponseEntity<Dog> responseEntity = restTemplate.exchange("http://api.apizoo.com/v1/dogs/15", HttpMethod.GET, requestEntity, Dog.class);

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Android Spring MobileMap// Handled with introspection

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Android Spring MobileUseDog dog = responseEntity.getBody()

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iOS RestKitRoute#import <RestKit/RestKit.h>RKObjectManager* manager = [RKObjectManager objectManagerWithBaseURL:@"http://api.apizoo.com/v1"];RKDynamicRouter* router = [[RKDynamicRouter new] autorelease];manager.router = router;[router routeClass:[Dog class] toResourcePath:@"/dogs" forMethod:RKRequestMethodPOST];[router routeClass:[Dog class] toResourcePath:@"/dogs/(dogID)"];

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iOS RestKitMap@implementation Dog+ (NSDictionary*)elementToPropertyMappings { return [NSDictionary dictionaryWithKeysAndObjects: @"name", @"color", nil];}@end

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iOS RestKitUseDog* dog = [Dog object];dog.name = @"Rover";Dog.color = @"red";[[RKObjectManager sharedManager] postObject:dog delegate:self];[[RKObjectManager sharedManager] deleteObject:dog delegate:self];

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Ruby on Rails ActiveResourceRouteresource :dogs

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Ruby on Rails ActiveResourceMapclass Dog < ActiveResource::Base self.site = "http://api.apizoo.com/v1"end

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Ruby on Rails ActiveResourceUsedog = Dog.new name: ‘Rover’, color: ‘red’dog.savedog.destroy

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Cache the response in a database

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Android Jersey + JacksonUsageRoll your own

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iOS RestKit + Core DataUsage#import <RestKit/CoreData/CoreData.h>RKObjectManager* manager = [RKObjectManager objectManagerWithBaseURL:@"http://api.apizoo.com/v1"];manager.objectStore = [RKManagedObjectStore objectStoreWithStoreFilename:@"DogApp.sqlite"];@implementation Dog + (NSString*)primaryKeyProperty { return @"dogID"; }@end

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Ruby on Rails ActiveResource + ActiveRecordUsageclass DogResource < ActiveResource::Base self.site = http://api.apizoo.com/v1endclass Dog < ActiveRecord::Base # the before methods call DogResource methods before_create :create_resource before_update :update_resource before_destroy :destroy_resourceend

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Simple to do list

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Problem: we want new capabilities in our app notsupported by APIs.

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Usergrid - Data & Querieshttp://www.youtube.com/watch?v=zLl56sU5Bt0

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Androidusergrid_ sdkiOSUse RESTKitRuby on RailsProbably not applicable

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What about offline cases

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AndroidRoll your owniOS-(BOOL)reachable {Reachability *r = [Reachability reachabilityWithHostName:@"api.apizoo.com/v1"];NetworkStatus internetStatus = [r currentReachabilityStatus];if(internetStatus == NotReachable) { return NO;}return YES;}Ruby on RailsProbably not applicable

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Get authorization out of the wayAssumption: the APIs we consume use OAuth 2

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AndroidRoll your own

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iOS RestKitRKObjectManager* objectManager = [RKObjectManager sharedManager];objectManager.client.baseURL = @”api.apizoo.com/v1";objectManager.client.OAuth2AccessToken = @"YOUR ACCESS TOKEN";objectManager.client.authenticationType = RKRequestAuthenticationTypeOAuth2;

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Ruby on Rails Oauth Gem@consumer=OAuth::Consumer.new("key","secret", site: "api.apizoo.com/v1")@request_token=@consumer.get_request_tokensession[:request_token]=@request_tokenredirect_to @request_token.authorize_url@access_token=@request_token.get_access_token

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AndroidBuilt-in JSON, etc.Spring Mobile (bundles Jersey & Jackson)iOSJSONKitRestKitCore DataRuby on RailsYAJLActiveResourceOauth

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Coming Up: March Miniseries on Apps & APIs

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Questions?

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THANK YOUSubscribe to API webinars at:youtube.com/apigee

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THANK YOUChat on IRC#api-craft

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THANK YOUQuestions and ideas to:groups.google.com/group/api-craft

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THANK YOUContact us at:@edanuffed@apigee.com@sramjisramji@apigee.com@landlessnessbrian@apigee.com