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AFNetworkActivityLogger

AFNetworkActivityLogger is an extension for AFNetworking 3.0 that logs network requests as they are sent and received.

AFNetworkActivityLogger listens AFNetworkingTaskDidStartNotification and AFNetworkingTaskDidFinishNotification notifications, which are posted by AFNetworking as session tasks are started and finish. For further customization of logging output, users are encouraged to implement desired functionality by creating new objects that conform to AFNetworkActivityLoggerProtocol.

2.x -> 3.x Migration

3.0.0 featured the following breaking API changes:

  • The log level property is now found on the individual unique loggers, rather than the shared logger. This allows for more advanced customization options for logging level.
  • The filterPredicate property is now found on the individual unique loggers, rather than the shared logger. This allows for more advanced customization options for logging specific requests.

Usage

Add the following code to AppDelegate.m -application:didFinishLaunchingWithOptions::

[[AFNetworkActivityLogger sharedLogger] startLogging];

Now all NSURLSessionTask objects created by an AFURLSessionManager will have their request and response logged to the console, a la:

GET http://example.com/foo/bar.json
200 http://example.com/foo/bar.json [0.1860 s]

If the default logging level is too verbose—say, if you only want to know when requests fail—then changing it is as simple as:

[[AFNetworkActivityLogger sharedLogger] setLevel:AFLoggerLevelError];

Logging Levels

By default, the shared logger is configured with an AFNetworkActivityConsoleLogger with a debug level set to AFLoggerLevelInfo. To change the level, simply access the logger through the loggers property, and adjust the level. The following levels are provided:

  • AFLoggerLevelOff: Do not log requests or responses.
  • AFLoggerLevelDebug :Logs HTTP method, URL, header fields, & request body for requests, and status code, URL, header fields, response string, & elapsed time for responses.
  • AFLoggerLevelInfo: Logs HTTP method & URL for requests, and status code, URL, & elapsed time for responses.
  • AFLoggerLevelError: Logs HTTP method & URL for requests, and status code, URL, & elapsed time for responses, but only for failed requests.

Filtering Requests

To limit the requests that are logged by a unique logger, each object that conforms to AFNetworkActivityLoggerProtocol has a filterPredicate property. If the predicate returns true, the request will not be forwarded to the logger. For example, a custom file logger could be created that only logs requests for http://httpbin.org, while a console logger could be used to log all errors in the application.

AFNetworkActivityConsoleLogger *testLogger = [AFNetworkActivityConsoleLogger new];
NSPredicate *predicate = [NSPredicate predicateWithBlock:^BOOL(NSURLRequest *  _Nonnull request, NSDictionary<NSString *,id> * _Nullable bindings) {
    return !([[request URL] baseURL] isEqualToString:@"httpbin.org"])
}];
[testLogger setFilterPredicate:predicate];

Custom Loggers

By default, the shared logger is configured with an AFNetworkActivityConsoleLogger.

To create a custom logger, create a new object that conforms to AFNetworkActivityLoggerProtocol, and add it to the shared logger. Be sure and configure the proper default logging level.

License

AFNetworkActivityLogger is available under the MIT license. See the LICENSE file for more info.