Open Radar

 
Area:
CFNetwork Framework

Summary:
Contrary to what its prototype and documentation state, +[NSHTTPURLResponse localizedStringForStatusCode:] only returns messages in English. All localized messages exist in the CFNetwork bundle, which suggests the implementation is incorrect.

Steps to Reproduce:
Call for example [NSHTTPURLResponse localizedStringForStatusCode:502] on a device whose language has been set to French.

Expected Results:
The returned value is "passerelle incorrecte".

Observed Results:
The returned value is "bad gateway".

Version:
Tested on iOS 9.3 and above, iOS 11 beta 1 included.

Notes:
All strings have been already properly localized and are available from the CFNetwork bundle, though. Currently, we can therefore fix the implementation by using the value in English returned by +localizedStringForStatusCode: as localization key to retrieve the properly localized variant:

+ (NSString *)workaround_localizedStringForStatusCode:(NSInteger)statusCode
{
    NSString *localizationKey = [NSHTTPURLResponse localizedStringForStatusCode:statusCode];
    NSBundle *bundle = [NSBundle bundleWithIdentifier:@"com.apple.CFNetwork"];
    return [bundle localizedStringForKey:localizationKey value:localizationKey table:nil];
}