By Rodrigo Sieiro - http://rodrigo.sharpcube.com
RSOAuthEngine is an ARC based OAuth engine for MKNetworkKit. It supports OAuth 1.0a and it's fully compatible with MKNetworkKit existing classes, allowing you to simply inherit
RSOAuthEngine instead of
MKNetworkEngine to get OAuth support.
If you already have a project using MKNetworkKit, just add the contents of the
RSOAuthEngine directory to your project and change all classes that inherit from
MKNetworkEngine to inherit from
RSOAuthEngine instead. Whenever you need to send an OAuth signed request, replace calls to
If you're not currently using MKNetworkKit, follow the instructions to add it to your project here first, then add RSOAuthEngine as written in the previous paragraph. Important: although not mentioned in the instructions, MKNetworkKit also requires Security.framework.
A common OAuth flow using RSOAuthEngine should go like this:
- Create a class that inherits from RSOAuthEngine.
- Init your class using one of the defined initializers that include your Consumer Key and Secret.
- Send a signed operation to get a request token.
- Fill the request token using
- Redirect the user to the authorization page and wait for the callback.
- Fill the request token (again) using
RSOAuthRequestTokenas type), this time using the parameters received in the callback.
- Send another request to get an access token.
- Fill the access token using
- From now on, all requests sent with
enqueueSignedOperationwill be signed with your tokens.
Alternatively you could use
setAccessToken:secret after initialization to define a previously stored access token.
RSOAuthEngine comes with a sample project that demonstrates how to use it to authenticate with Twitter. It includes a basic Twitter engine that implements Twitter's OAuth authentication flow and allows you to post a tweet. It also shows you how to persist the OAuth access token in the Keychain. The Twitter engine should not be considered production code, and is only included to demonstrate RSOAuthEngine.
To build the demo project, follow these steps:
- In the project directory, run
git submodule update --initto retrieve MKNetworkKit (added to the project as a submodule).
- Put your consumer key and secret at the top of
RSTwitterEngine.mand remove the
#errormacro. If you don't have a consumer key/secret, register an app at https://dev.twitter.com/apps to get a pair. Important: you need to add a dummy callback URL to your app when registering, otherwise Twitter won't allow you to send a callback URL in the OAuth request.
Currently this engine has only been tested with Twitter. If you use RSOAuthEngine to implement OAuth authentication with another service, please let me know so I can update this session.
RSOAuthEngine is licensed under the MIT License. Please give me some kind of attribution if you use it in your project, such as a "thanks" note somewhere. I'd also love to know if you use my code, please drop me a line if you do!
Full license text follows:
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
RSOAuthEngine may contain code from ASI-HTTP-Request-OAuth by Scott James Remnant and the iPhone version of OAuthConsumer by Jonathan George. I used bits and pieces of the code from both projects as references to write this engine.