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ASIHTTPRequest is an easy to use wrapper around the CFNetwork API that makes some of the more tedious aspects of communicating with web servers easier. It is written in Objective-C and works in both Mac OS X and iPhone applications.

It is suitable performing basic HTTP requests and interacting with REST-based services (GET / POST / PUT / DELETE). The included ASIFormDataRequest subclass makes it easy to submit POST data and files using multipart/form-data.

It provides:

  • A straightforward interface for submitting data to and fetching data from webservers
  • Download data to memory or directly to a file on disk
  • Submit files on local drives as part of POST data, compatible with the HTML file input mechanism
  • Stream request bodies directly from disk to the server, to conserve memory
  • Resume for partial downloads
  • Easy access to request and response HTTP headers
  • Progress delegates (NSProgressIndicators and UIProgressViews) to show information about download AND upload progress
  • Auto-magic management of upload and download progress indicators for operation queues
  • Basic, Digest + NTLM authentication support, credentials are automatically re-used for the duration of a session, and can be stored for later in the Keychain.
  • Cookie support
  • [NEW] Requests can continue to run when your app moves to the background (iOS 4+)
  • GZIP support for response data AND request bodies
  • The included ASIDownloadCache class lets requests transparently cache responses, and allow requests for cached data to succeed even when there is no network available
  • [NEW] ASIWebPageRequest – download complete webpages, including external resources like images and stylesheets. Pages of any size can be indefinitely cached, and displayed in a UIWebview / WebView even when you have no network connection.
  • Easy to use support for Amazon S3 – no need to fiddle around signing requests yourself!
  • Full support for Rackspace Cloud Files
  • [NEW] Client certificates support
  • Supports manual and auto-detected proxies, authenticating proxies, and PAC file auto-configuration. The built-in login dialog lets your iPhone application work transparently with authenticating proxies without any additional effort.
  • Bandwidth throttling support
  • Support for persistent connections
  • Supports synchronous & asynchronous requests
  • Get notifications about changes in your request state via delegation or [NEW] blocks (Mac OS X 10.6, iOS 4 and above)
  • Comes with a broad range of unit tests

ASIHTTPRequest is compatible with Mac OS 10.5 or later, and iOS 3.0 or later.

Documentation is available here.


ASIHTTPRequest packaged as a static iOS framework







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