ARBK Scraper

A Watir ruby script to scrape business registration data from ARBK's website.

Requirements

• MongoDB: to persist the scraped data.
• ruby: to run the ruby script.
• ruby-dev: to install the ruby mongo driver.
• Make: to install ruby gems.
• zlib: we need to install the watir-nokogiri gem which depends on zlib (or else we get the error: "zlib is missing; necessary for building libxml2").
• ChromeDriver - WebDriver for Chrome: to interact with the Chrome driver via the watir ruby gem.

Ruby Dependencies

• rubygems.
• mongo-ruby-driver: a mongo driver.
• watir: interface to script interactions with the Chrome browser.
• nokogiri: an HTML, XML, SAX, and Reader parser. Among Nokogiri's many features is the ability to search documents via XPath or CSS3 selectors.

Possible Errors

Errors can occur during the scraping process. The following is a list of possible errors.

1. no such window: target window already closed\nfrom unknown error: web view not found\n (Session info: chrome=57.0.2987.110)\n (Driver info: chromedriver=2.28.455517 (2c6d2707d8ea850c862f04ac066724273981e88f),platform=Mac OS X 10.12.3 x86_64).
2. unknown error: Element is not clickable at point (93, 334). Other element would receive the click: <li class="sf-megamenu-wrapper odd sf-item-1 sf-depth-1 sf-total-children-5 sf-parent-children-5 sf-single-children-0 menuparent">...
\n (Session info: chrome=57.0.2987.110)\n (Driver info: chromedriver=2.28.455517 (2c6d2707d8ea850c862f04ac066724273981e88f),platform=Mac OS X 10.12.3 x86_64).
3. Net::ReadTimeout.
4. undefined local variable or method `browser' for main:Object.
5. unexpected alert open: {Alert text : [object Object]}\n (Session info: chrome=57.0.2987.110)\n (Driver info: chromedriver=2.28.455517 (2c6d2707d8ea850c862f04ac066724273981e88f),platform=Mac OS X 10.12.3 x86_64).
6. timed out after 30 seconds, waiting for #<Watir::TextField: located: false; {:id=>"MainContent_ctl00_txtNumriBiznesit", :tag_name=>"input"}> to be located.
7. no such session\n (Driver info: chromedriver=2.28.455517 (2c6d2707d8ea850c862f04ac066724273981e88f),platform=Mac OS X 10.12.3 x86_64).
8. Too many failed attempts to load search page: Net::ReadTimeout.
9. timed out after 30 seconds, waiting for #<Watir::Anchor: located: false; {:xpath=>"//table[@class='views-table cols-4']/tbody//td/a", :tag_name=>"a"}> to be located.
10. Too many failed attempts to load page via anchor click: timed out after 30 seconds, waiting for #<Watir::Anchor: located: false; {:xpath=>"//table[@class='views-table cols-4']/tbody//td/a", :tag_name=>"a"}> to be located.
11. unknown error: Element <input name="ctl00$MainContent$ctl00$Submit1" type="submit" id="MainContent_ctl00_Submit1" value="Kërko"> is not clickable at point (93, 275). Other element would receive the click:
    ...
    \n (Session info: chrome=57.0.2987.110)\n (Driver info: chromedriver=2.28.455517 (2c6d2707d8ea850c862f04ac066724273981e88f),platform=Mac OS X 10.12.3 x86_64).
12. browser window was closed.

You can count how many of each error type occurs with the following query:

db.errors.aggregate([
  {$group : 
    { _id : '$errorMsg', count : {$sum : 1}}
  }
]).pretty()