Collect 1.65 million emails from the pages of contacts for 2.5 hours

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1. First of all collect by the parser SE::Google links to pages with contacts:

• Choosing a preset 1000 Links use Proxy, which saving links on request with a maximum depth
• Add unique links by domain
• Specify the key phrase "контакты"
• Add 2 query format to propagate requests and receive a large number of results

Spoiler: Code of preset

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b2dsZSIsIjEwMDAgTGlua3MgdXNlIFByb3h5Iix7InR5cGUiOiJ1bmlxdWUiLCJy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The result is a database containing 1663086 links to the pages of contact of various sites:

2. At collected links using parser Net::HTTP and regular expression collect the email address:

• Disable the use of proxy
• With the option Parse custom result specify a regular expression ((?>\b[-a-z0-9._%+]+)@[a-z0-9.-]+\.[a-z]{2,6})\b to collect email addresses from page source - $data
• Add the conversion of result to lower case and unique by string
• As the request specifying the base of links, collected in the first task

Spoiler: Code of preset
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As a result we get database contains 1647115 unique email address:

• The average speed of processing was 12,000 links per minute
• TOP10 e-mail domains:

249772 mail.ru
129894 gmail.com
91901 yandex.ru
25625 rambler.ru
20821 bk.ru
19773 hotmail.com
14656 yahoo.com
14117 list.ru
13636 inbox.ru
11670 ukr.net