Meetup OAuth2 Client
MeetupOAuth2Client is an HTTP OAuth2 authentication client specifically for use with the Meetup.com API. This small library is completely self-contained–no dependencies. It features a nice pop-out animating web view to display the Meetup authorization page.
##Installation
Add the contents of the MUOAuth2Client/src folder to your project.
##Use and Flow
At the point in your application where you need to access the user's resources, the flow should be like the following:
// Grab a reference to the shared instance of `MUOAuth2Client`.
MUOAuth2Client *client = [MUOAuth2Client sharedClient];
// Attempt to unarchive an existing credential.
self.credential = [client credentialWithClientID:@"YOUR_CLIENT_ID"];
if (!self.credential) {
// Here you should show the pre-logged in state of your application.
// where the user may be presented with a "log in" button.
// (See the "authorization" snippet)
} else if (self.credential.isExpired) {
// Refresh the credential.
[client refreshCredential:self.credential success:^(MUOAuth2Credential *credential) {
// Hang on to this new credential.
self.credential = credential;
} failure:^(NSError *error) {
// Handle the error.
NSLog(@"Authorization error -> %@", error);
}];
} else {
// The credential should be valid.
// Proceed with accessing the Meetup API and loading the user's resources.
}
Authorization
The following will trigger a web view presentation of the Meetup.com mobile log-in/authorization page allowing the user to authorize your application:
// Grab a reference to the shared instance of `MUOAuth2Client`.
MUOAuth2Client *client = [MUOAuth2Client sharedClient];
// Authorize your client application with the client ID, secret, and redirect URI you set up with Meetup.com.
[client authorizeClientWithID:@"YOUR_CLIENT_ID" secret:@"SECRET" redirectURI:@"REDIRECT" success:^(MUOAuth2Credential *credential) {
// Hang on the credential.
self.credential = credential;
// Proceed with accessing the Meetup API and loading the user's resources.
} failure:^(NSError *error) {
// Handle the error.
NSLog(@"Authorization error -> %@", error);
}];
Using the credential
Once you have obtained a valid MUOAuth2Credential object, you can use it's accessToken property to append to your requests to the Meetup.com API: credential.accessToken.
Using the MUAPIRequest class
The MUAPIRequest class provides a convenient way to access Meetup API endpoints, and parse JSON response bodies. For example:
- (void)accessMemberSelf
{
MUOAuth2Credential* credential = [[MUOAuth2Client sharedClient] credentialWithClientID:@"oauth-consumer-key"];
[MUAPIRequest getRequestWithURL:@"https://api.meetup.com/2/member/self.json"
parameters:@{}
andCredential:credential
completion:^(MUAPIRequest *request) {
NSLog(@"Response = %@", request.response); // response object
NSLog(@"Error = %@", request.error); // set if there was an error
NSLog(@"JSON = %@", request.responseBody); // JSON Decoded to NSDictionary
}];
}##Requirements MUOAuth2Client requires iOS 5.0 or higher and uses ARC.
##Notes This library does not communicate with Meetup.com other than to authorize client applications and obtain and refresh access tokens. Further communication with the Meetup.com API could be done with a library such as AFNetworking. This library is intentionally simple, but no doubt there is room for improvement. Contributions are welcome.
Demo App
Included in the project is a sample application to illustrate the flow of the authorization and refreshing of tokens.