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Plan B: Remote Scripting With IFRAMEs

I have plans to apply AJAX to our library catalog but I’m running into a problem where I can’t do XMLHttpRequest events to servers other than the one I loaded the main webpage from. Mozilla calls it the “same origin policy,” everyone else calls it a cross-domain script exclusion, or something like that.

Some Mozilla folks are working on a standard to address the problem, but it could be quite a while before browser support is common enough to build for it.

So Plan A was to use simple AJAX with XMLHTTPRequest. Plan B comes from this crazy suggestion at Apple’s developer site: Remote Scripting with IFRAME. It looks like different functions are subject to different restrictions, so the theory is that a JavaSctript loaded in a page in a hidden IFRAME can call functions from the parent page and do pretty much everything we’ve come to expect of XMLHTTPRequest. Here’s an example they offer.

Crazy as it is it works, and it gets around some cross-domain script exclusions for some browsers, but it still gets trapped by Mozilla.

The Coming Information Age

That headline might seem a little late among the folks reading this. But we’re all geeks, and if not geeks, then at least regular computer users. Regular computer users, however, are a minority. Worldwide, only around 500 million people have internet access, and fewer than 100 million people in the US have internet access at […] » about 500 words

Put A Pepper In Your Library

Libraries are known for books. And despite the constant march of technology, despite the fact that we can put a bazillion songs in our pocket, despite the availability of the New York Times and so many other newspapers and thousands of journals online, books are a big part of what libraries are. Books, dead tree […] » about 600 words

The High Cost Of Metasearch For Libraries

I’ve been looking seriously at metasearch/federated search products for libraries recently. After a lot of reading and a few demos I’ve got some complaints. I’m surprised how vendors, even now, devote so much time demonstrating patron features that are neither used nor appreciated by any patrons without an MLS. Recent lessons (one, two, three) should […] » about 500 words

LibDev Launched

LibDev launched today. From the Welcome message there: LibDev is a site for those interested in libraries and networked information. Want to find a way to apply tags or social bookmarking to library content? Interested in how Wikipedia can serve libraries? Want to find a better way to do patron loads or talk about what […] » about 200 words

Wikipedia and Libraries

Wikipedia seems to get mixed reviews in the academic world, but I don’t fully understand why. There are those that complain that they can’t trust the untamed masses with such an important task as writing and editing an encyclopedia, then there are others that say you can’t trust the experts with it either. For my […] » about 400 words

…And Then You Realize You Wasted Your Life

I think I’ve been avoiding commenting on this issue for weeks because it hits so close to home. First I read it in BiblioAcid, then Jenny Levine picked it up, then Richard Ackerman picked it up at the Science Library Pad: library catalogs are broken, and there’s no amount of adding pictures or fiddling with […] » about 500 words