Can I force all links in a WebView (or WebFrame) to be treated as absolute paths?

Question

So I'm working with WebKit's - WebView and WebFrame. I use a custom NSURLProtocol to retrieve the HTML for each request from a database. The problem arises from the fact that the links in the HTML are all relative, when they really ought to be absolute. For example, the page

foo/bar.html

May have a link in it that points to

foo/baz.html

The problem is that since the link is relative, the request ends up being for

/foo/foo/baz.html

So far, I've tried to work around this by comparing the two URLs and stripping off the common prefix - in this case 'foo/' - leaving me with foo/baz.html. This doesn't work for all possibilities, however, especially when there are multiple directories in the path. I do this in the "didStartProvisionalLoadForFrame:" method of my WebView's frameLoadDelegate.

Unfortunately, I do not have control over the HTML that I'm displaying, so modifying the links themselves is not an option.

Answer 1

Try being the main frame's resource load delegate, and implementing webView:resource:willSendRequest:redirectResponse:fromDataSource: to modify the URL being requested. Send relativeString to the request's URL to get the original relative URL, then use -[NSURL initWithString:baseURL:] to create a new URL with the same relative string against the correct base URL.