Цытыта:
How will you support search engine indexing?
Search engines point "robot" scripts to a website and have them accumulate a collection of pages. The robot works by scooting through the website, finding standard links to standard URLs and following them. It won't click on buttons or type in values like a user would, and it probably won't distinguish among fragment identifiers either. So if it sees links to
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and
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, it will follow one or the other, but not both. That's a big problem, because it means an entire Ajax application will only have one searchlink associated with it, and you'll have miss out on a lot of potential visits.
The simplest approach is to live with a single page and do whatever you can with the initial HTML. Ensure it contains all info required for indexing, focusing on meta tags, headings, and initial content.
A more sophisticated technique is to provide a Site Map page, linked from the main page, that links to all URLs you want indexed with the link text containing suitable descriptions. One catch here: you can't link to URLs with fragment identifiers, so you'll need to come up with a way to present search engines with standard URLs, even though your application would normally present those using fragment identifiers. For example, have the Site Map link to
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and configure your server to redirect to
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. It's probably reasonable to explicitly check if a robot is performing the search, and preserve the URL if that's the case - i.e. when the robot requests
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, simply output the same contents as the user would see on
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. Thus, the search engine will index
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with the correct content, and when the user clicks on a search result, the server will know (because the client is not a bobot) to redirect to
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.
Search engine strategies for Ajax applications has been discussed in a
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detailed paper by Jeremy Hartlet of Backbase. See that paper for more details, though note that some advice is Backbase-specific.
