Skip to content
Simple, but smart, multi-threaded web crawler for randomly gathering huge lists of unique domain names.
Go
Branch: master
Clone or download
Fetching latest commit…
Cannot retrieve the latest commit at this time.
Permalink
Type Name Latest commit message Commit time
Failed to load latest commit information.
img
LICENSE
README.md
dcrawl.go

README.md

dcrawl

dcrawl is a simple, but smart, multi-threaded web crawler for randomly gathering huge lists of unique domain names.

baby-gopher

demo

How it works?

dcrawl takes one site URL as input and detects all <a href=...> links in the site's body. Each found link is put into the queue. Successively, each queued link is crawled in the same way, branching out to more URLs found in links on each site's body.

How smart crawling works:

  • Branching out only to predefined number of links found per one hostname.
  • Maximum number of allowed different hostnames per one domain (avoids subdomain crawling hell e.g. blogspot.com).
  • Can be restarted with same list of domains - last saved domains are added to the URL queue.
  • Crawls only sites that return text/html Content-Type in HEAD response.
  • Retrieves site body of maximum 1MB size.
  • Does not save inaccessible domains.

How to run?

go build dcrawl.go
./dcrawl -url http://wired.com -out ~/domain_lists/domains1.txt -t 8

Usage

     ___                          __
  __| _/________________ __  _  _|  |
 / __ |/ ___\_  __ \__  \\ \/ \/ /  |
/ /_/ \  \___|  | \// __ \\     /|  |__
\____ |\___  >__|  (____  /\/\_/ |____/
     \/    \/           \/       v.1.0

usage: dcrawl -url URL -out OUTPUT_FILE -t THREADS

  -ms int
        maximum different subdomains for one domain (def. 10) (default 10)
  -mu int
        maximum number of links to spider per hostname (def. 5) (default 5)
  -out string
        output file to save hostnames to
  -t int
        number of concurrent threads (def. 8) (default 8)
  -url string
        URL to start scraping from
  -v bool
        verbose (default false)

License

dcrawl was made by Kuba Gretzky from breakdev.org and released under the MIT license.

You can’t perform that action at this time.