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SitePoint PHP Blog:
Crawling and Searching Entire Domains with Diffbot
July 02, 2015 @ 09:41:39

The SitePoint PHP blog has a new tutorial posted, the first part in a new series, showing you how to create a "powerful custom search engine" with the help of the Diffbot service. In this first part they help you get everything you need set up (including a VM to run it from).

In this tutorial, I'll show you how to build a custom SitePoint search engine that far outdoes anything WordPress could ever put out. We'll be using Diffbot as a service to extract structured data from SitePoint automatically, and this matching API client to do both the searching and crawling. I'll also be using my trusty Homestead Improved environment for a clean project, so I can experiment in a VM that's dedicated to this project and this project alone.

He walks you through each step of the process, first creating the "crawljob" script and then executing it to gather the results. He also shows how to show this information via a simple GUI when searches are performed. A Diffbot PHP client library makes creating the crawljob simpler and lets you configure things like max number of items to crawl, patterns to match and what URLs to follow on the pages. Running the script creates the job which is then executed immediately. The same library makes search the data simpler too, using a "search" method along with some special tagging, and returning a JSON result with the matching records.

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crawl domain diffbot search engine part1 series tutorial

Link: http://www.sitepoint.com/crawling-searching-entire-domains-diffbot/

SitePoint PHP Blog:
Diffbot Crawling with Visual Machine Learning
August 01, 2014 @ 11:37:12

On the SitePoint PHP blog Bruno Skvorc has posted a tutorial showing you how to use the Diffbot service to extract data from any page. He introduces both the service itself and walks you through a simple request via Guzzle.

Have you ever wondered how social networks do URL previews so well when you share links? How do they know which images to grab, whom to cite as an author, or which tags to attach to the preview? Is it all crawling with complex regexes over source code? Actually, more often than not, it isn't. [...] If you want to build a URL preview snippet or a news aggregator, there are many automatic crawlers available online, both proprietary and open source, but you seldom find something as niche as visual machine learning. This is exactly what Diffbot is - a "visual learning robot" which renders a URL you request in full and then visually extracts data, helping itself with some metadata from the page source as needed.

He uses a combination of a Laravel installation (via a Homestead instance) and a Guzzle request using a fetched token. The service offers a 10k call limit on a 7 day free trial, so you can sign up and grab your token there. He includes code for an example request fetching a SitePoint page and parsing out the tags. He also briefly looks at the custom handling diffbot allows based on CSS-type rules.

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diffbot parse data service api guzzle homestead tutorial introduction

Link: http://www.sitepoint.com/diffbot-crawling-visual-machine-learning/


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