Wednesday, November 30, 2011

Just How Smart Are Search Robots?





Matt Cutts announced at Pubcon that Googlebot is “getting smarter.” He also announced that Googlebot can crawl AJAX to retrieve Facebook comments coincidentally only hours after I unveiled Joshua Giardino's research that suggested Googlebot is actually a headless browser based off the Chromium codebase at SearchLove New York. I'm going to challenge Matt Cutts' statements, Googlebot hasn't just recently gotten smarter, it actually hasn’t been a text-based crawler for some time now; nor has BingBot or Slurp for that matter. There is evidence that Search Robots are headless web browsers and the Search Engines have had this capability since 2004.









A headless browser is simply a full-featured web browser with no visual interface. Similar to the TSR (Terminate Stay Resident) programs that live on your system tray in Windows they run without you seeing anything on your screen but other programs may interact with them. With a headless browser you can interface with it via a command-line or scripting language and therefore load a webpage and programmatically examine the same output a user would see in Firefox, Chrome or (gasp) Internet Explorer. Vanessa Fox alluded that Google may be using these to crawl AJAX in January of 2010.



However Search Engines would have us believe that their crawlers are still similar to Unix’s Lynx browser and can only see and understand text and its associated markup. Basically they have trained us to believe that Googlebot, Slurp and Bingbot are a lot like Pacman in that you point it in a direction and it gobbles up everything it can without being able to see where it’s going or what it’s looking at. Think of the dashes that Pacman eats as webpages. Every once in a while it hits a wall and is forced in another direction. Think of SEOs as the power pills. Think of ghosts as technical SEO issues that might trip up Pacman and cause him to not complete the level that is your page. When an SEO gets involved with a site it helps a search engine spider eat the ghost; when they don’t Pacman dies and starts another life on another site.





That’s what they have been selling us for years the only problem is it’s simply not true anymore and hasn’t been for some time. To be fair though Google normally only lies by omission so it’s our fault for taking so long to figure it out.



I encourage you to read Josh’s paper in full but some highlights that indicate this are:



  • A patent filed in 2004 entitled “Document Segmentation Based on Visual Gaps” discusses methods Google uses to render pages visually and traversing the Document Object Model (DOM) to better understand the content and structure of a page. A key excerpt from that patent says “Other techniques for generating appropriate weights may also be used, such as based on examination of the behavior or source code of Web browser software or using a labeled corpus of hand-segmented web pages to automatically set weights through a machine learning process.”


  • The wily Mr. Cutts suggested at Pubcon that GoogleBot will soon be taking into account what is happening above the fold as an indication user experience quality as though it were a new feature. That’s curious because according to the “Ranking Documents Based on User Behavior and/or Feature Data” patent from June 17, 2004 they have been able to do this for the past seven years. A key excerpt from that patent describes “Examples of features associated with a link might include the font size of the anchor text associated with the link; the position of the link (measured, for example, in a HTML list, in running text, above or below the first screenful viewed on an 800.times.600 browser display, side (top, bottom, left, right) of document, in a footer, in a sidebar, etc.); if the link is in a list, the position of the link in the list; font color and/or attributes of the link (e.g., italics, gray, same color as background, etc.);” This is evidence that Google has visually considered the fold for some time. I also would say that this is live right now as there are instant previews that show a cut-off at the point which Google is considering the fold.


  • It is no secret that Google has been executing JavaScript to a degree for some time now but “Searching Through Content Which is Accessible Through Web-based Forms” shows an indication that Google is using a headless browser to perform the transformations necessary to dynamically input forms. “Many web sites often use JavaScript to modify the method invocation string before form submission. This is done to prevent each crawling of their web forms. These web forms cannot be automatically invoked easily. In various embodiments, to get around this impediment, a JavaScript emulation engine is used. In one implementation, a simple browser client is invoked, which in turn invokes a JavaScript engine.” Hmmm…interesting.




Google also owns a considerable amount of IBM patents as of June and August of 2011 and with that comes a lot of their awesome research into remote systems, parallel computing and headless machines for example the “Simultaneous network configuration of multiple headless machines” patent. Though Google has clearly done extensive research of their own in these areas.



Not to be left out there’s a Microsoft patent entitled “High Performance Script Behavior Detection Through Browser Shimming” where there is not much room for interpretation; in so many words it says Bingbot is a browser. "A method for analyzing one or more scripts contained within a document to determine if the scripts perform one or more predefined functions, the method comprising the steps of: identifying, from the one or more scripts, one or more scripts relevant to the one or more predefined functions; interpreting the one or more relevant scripts; intercepting an external function call from the one or more relevant scripts while the one or more relevant scripts are being interpreted, the external function call directed to a document object model of the document; providing a generic response, independent of the document object model, to the external function call; requesting a browser to construct the document object model if the generic response did not enable further operation of the relevant scripts; and providing a specific response, obtained with reference to the constructed document object model, to the external function call if the browser was requested to construct the document object model. Curious, indeed.



Furthermore, Yahoo filed a patent on Feb 22, 2005 entitled  "Techniques for crawling dynamic web content" which says "The software system architecture in which embodiments of the invention are implemented may vary. FIG 1 is one example of an architecture in which plug-in modules are integrated with a conventional web crawler and a browser engine which, in one implementation, functions like a conventional web browser without a user interface. Ladies and gentlemen I believe they call that a "smoking gun." The patent then goes on to discuss automatic and custom form filling and methods for handling JavaScript.



Peter Zmijewski is the founder and CEO at KeywordSpy. Through Internet Marketing he places his name on great search engine like-GOOGLE who is also called as Innovator, Investor, Internet Marketing Guru and Entrepreneur. For more updates don’t go away, please stay with us.

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