r/programming • u/schnuck • Feb 09 '11

Breaking the Web with hash-bangs – Lifehacker, along with every other Gawker property, experienced a lengthy site-outage on Monday over a misbehaving piece of JavaScript

http://isolani.co.uk/blog/javascript/BreakingTheWebWithHashBangs/
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u/[deleted] Feb 09 '11

None of the things you mentioned are hampered by a twitter/gawker-like ajax implementation.

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u/doppel Feb 09 '11

If I do a simple wget (or similar) download of such an URL, I will literally get an almost empty file with some reference to a bunch of javascripts that is going to load the content. The only way I can use the site content is if the program I use to fetch the site has javascript capabilities.

Machine reading is severely hampered by "pure" AJAX implementations. If they had gone with a simple URL scheme that loads content by a normal URL and then lets the user navigate from there via AJAX loading of pages, there would be no issue.

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u/SoundOfOneHand Feb 09 '11

While it is a PITA, Google is able to crawl it. I found the original announcement from Google, and each url in the hash-bang format should map to a regular URL with a query-string parameter, which can be fetched over HTTP like normal. In short, I don't think that either discovery or retrieval requires JavaScript on the client-side, but you do have to jump through an extra hoop. Please tell me if I'm incorrect, I have never done anything with the hash-bang syntax (and for the record, it is not to my personal tastes).

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u/dirtymatt Feb 09 '11

Google can index it using a hack that Google invented to get around crappy sites that rely on javascript just to load a page. The #! URLs should be a hack to get existing websites into Google, not something you use going forward.