Project site https://github.com/google/gtm-session-fetcher
Discussion group http://groups.google.com/group/google-toolbox-for-mac

GTMSessionFetcher makes it easy for Cocoa applications to perform http
operations. The fetcher is implemented as a wrapper on NSURLSession, so its
behavior is asynchronous and uses operating-system settings.
Features include:
- Simple to build; only one source/header file pair is required
 
- Simple to use: takes just two lines of code to fetch a request
 
- Supports upload and download sessions
 
- Flexible cookie storage
 
- Automatic retry on errors, with exponential backoff
 
- Support for generating multipart MIME upload streams
 
- Easy, convenient logging of http requests and responses
 
- Supports plug-in authentication such as with GTMAppAuth
 
- Easily testable; self-mocking
 
- Automatic rate limiting when created by the 
GTMSessionFetcherService factory class 
- Fully independent of other projects
 
To get started please read
USING.md
for detailed information.