[Cocoa] Ensure that the WebKit bundle version in the user agent string continues to match the current format

• Component: New Bugs
• Status: RESOLVED FIXED

[Mark Rowe (bdash)]

The WebKit version portion of the user agent string has historically had at most three components. There's no guarantee that the WebKit framework's bundle version will be limited in this fashion. We should ensure that the version inserted in to the user agent string continues to match the historical format.

<rdar://problem/17447771>

[Mark Rowe (bdash)]

Created attachment 234217 [details]
Patch

[Mark Rowe (bdash)]

Created attachment 234271 [details]
Patch

[Simon Fraser (smfr)]

Comment on attachment 234271 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=234271&action=review

> Source/WebCore/page/cocoa/UserAgent.mm:69
> +    // We include at most three components of the bundle version in the user agent string.
> +    NSString *bundleVersion = userVisibleWebKitBundleVersionFromFullVersion(fullWebKitVersion);
> +    NSScanner *scanner = [NSScanner scannerWithString:bundleVersion];
> +    NSInteger periodCount = 0;
> +    while (true) {
> +        if (![scanner scanUpToString:@"." intoString:nullptr] || scanner.isAtEnd)
> +            return bundleVersion;
> +
> +        if (++periodCount == 3)
> +            return [bundleVersion substringToIndex:scanner.scanLocation];
> +
> +        ++scanner.scanLocation;
> +    }
> +
> +    ASSERT_NOT_REACHED();

Can we do this in C++?

[Mark Rowe (bdash)]

(In reply to comment #3)
> (From update of attachment 234271 [details])
> Can we do this in C++?

It seemed preferable for the code to match our other internal implementation rather than writing it twice.

[Mark Rowe (bdash)]

Landed in r170735.
<https://trac.webkit.org/r170735>