NSURLRequest Cache Policy Documentation Inaccurate

Number:rdar://11541514 Date Originated:5/26/2012
Status:Open Resolved:
Product:Documentation Product Version:N/A
Classification:Other Bug Reproducible:N/A
Although there is an extensive list of different cache policies listed in the documentation (https://developer.apple.com/library/mac/#documentation/Cocoa/Reference/Foundation/Classes/NSURLRequest_Class/Reference/Reference.html#//apple_ref/doc/c_ref/NSURLRequestUseProtocolCachePolicy), at least a few of these policies are not actually implemented, or actually do something different than suggested.

This is misleading and code result in unexpected results for applications.

Here's what's actually in NSURLRequest.h

    NSURLRequestUseProtocolCachePolicy = 0,

    NSURLRequestReloadIgnoringLocalCacheData = 1,
    NSURLRequestReloadIgnoringLocalAndRemoteCacheData = 4, // Unimplemented
    NSURLRequestReloadIgnoringCacheData = NSURLRequestReloadIgnoringLocalCacheData,

    NSURLRequestReturnCacheDataElseLoad = 2,
    NSURLRequestReturnCacheDataDontLoad = 3,

    NSURLRequestReloadRevalidatingCacheData = 5, // Unimplemented
typedef NSUInteger NSURLRequestCachePolicy;

Steps to Reproduce:

Expected Results:
Documentation would indicate which policies are not implemented and which behaviors are different than described.

Actual Results:
Not the case.




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