Source/WebCore/platform/mac/WebCoreNSURLExtras.mm

/*
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#import "config.h"
#import "WebCoreNSURLExtras.h"

#import <pal/spi/cf/CFNetworkSPI.h>
#import <wtf/Function.h>
#import <wtf/ObjCRuntimeExtras.h>
#import <wtf/RetainPtr.h>
#import <wtf/Vector.h>
#import <unicode/uchar.h>
#import <unicode/uidna.h>
#import <unicode/uscript.h>

namespace WebCore {

NSURL *URLByCanonicalizingURL(NSURL *URL)
{
    RetainPtr<NSURLRequest> request = adoptNS([[NSURLRequest alloc] initWithURL:URL]);
    Class concreteClass = [NSURLProtocol _protocolClassForRequest:request.get()];
    if (!concreteClass) {
        return URL;
    }
    
    // This applies NSURL's concept of canonicalization, but not URL's concept. It would
    // make sense to apply both, but when we tried that it caused a performance degradation
    // (see 5315926). It might make sense to apply only the URL concept and not the NSURL
    // concept, but it's too risky to make that change for WebKit 3.0.
    NSURLRequest *newRequest = [concreteClass canonicalRequestForRequest:request.get()];
    NSURL *newURL = [newRequest URL]; 
    return [[newURL retain] autorelease];
}

} // namespace WebCore