• Creating Protocol Objects

• Registering and Unregistering Protocol Classes

• Getting and Setting Request Properties

• Determining If a Subclass Can Handle a Request

• Providing a Canonical Version of a Request

• Determining If Requests Are Cache Equivalent

• Starting and Stopping Downloads

• Getting Protocol Attributes

• canInitWithRequest:

• canonicalRequestForRequest:

• propertyForKey:inRequest:

• registerClass:

• removePropertyForKey:inRequest:

• requestIsCacheEquivalent:toRequest:

• setProperty:forKey:inRequest:

• unregisterClass:

• cachedResponse

• client

• initWithRequest:cachedResponse:client:

• request

• startLoading

• stopLoading