A JSON-RPC Client built on AFNetworking
JSON-RPC is a remote procedure call protocol encoded in JSON. It is a simple protocol (and very similar to XML-RPC), defining only a handful of data types and commands. JSON-RPC allows for notifications (info sent to the server that does not require a response) and for multiple calls to be sent to the server which may be answered out of order.
AFJSONRPCClient *client = [AFJSONRPCClient clientWithEndpointURL:[NSURL URLWithString:@"http://path.to/json-rpc/service/"]]; // Invocation [client invokeMethod:@"method.name" success:^(AFHTTPRequestOperation *operation, id responseObject) { // ... } failure:^(AFHTTPRequestOperation *operation, NSError *error) { // ... }]; // Invocation with Parameters [client invokeMethod:@"method.name" parameters:@{@"foo" : @"bar", @"baz" : @(13)} success:^(AFHTTPRequestOperation *operation, id responseObject) { // ... } failure:^(AFHTTPRequestOperation *operation, NSError *error) { // ... }]; // Invocation with Parameters and Request ID [client invokeMethod:@"method.name" parameters:@[@(YES), @(42)] requestId:@(2) success:^(AFHTTPRequestOperation *operation, id responseObject) { // ... } failure:^(AFHTTPRequestOperation *operation, NSError *error) { // ... }];Combine your JSON-RPC client with an Objective-C protocol for fun and profit!
@protocol ArithemeticProtocol - (void)sum:(NSArray *)numbers success:(void (^)(NSNumber *sum))success; failure:(void (^)(NSError *error))failure; @end AFJSONRPCClient *client = [AFJSONRPCClient clientWithEndpointURL:[NSURL URLWithString:@"http://path.to/json-rpc/service/"]]; [[client proxyForProtocol:@protocol(ArithemeticProtocol)] sum:@[@(1), @(2)] success:^(NSNumber *sum) { // ... } failure:^(NSError *error) { // ... }];You can also subclass AFJSONRPCClient for shared class and service-related methods:
MyJSONRPCClient *client = [MyJSONRPCClient sharedClient]; [client sum:@[@(1), @(2)] success:^(NSNumber *sum) { // ... } failure:^(NSError *error) { // ... }];CocoaPods is the recommended way to add AFJSONRPCClient to your project.
Here's an example podfile that installs AFJSONRPCClient and its dependency, AFNetworking.
platform :ios, '5.0' pod 'AFJSONRPCClient', '0.1.0'Note the specification of iOS 5.0 as the platform; leaving out the 5.0 will cause CocoaPods to fail with the following message:
[!] AFJSONRPCClient is not compatible with iOS 4.3.
AFJSONRPCClient and AFNetworking are available under the MIT license. See the LICENSE file for more info.