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Colly

Lightning Fast and Elegant Scraping Framework for Gophers

Colly provides a clean interface to write any kind of crawler/scraper/spider.

With Colly you can easily extract structured data from websites, which can be used for a wide range of applications, like data mining, data processing or archiving.

Features

• Clean API
• Fast (>1k request/sec on a single core)
• Manages request delays and maximum concurrency per domain
• Automatic cookie and session handling
• Sync/async/parallel scraping
• Caching
• Automatic encoding of non-unicode responses
• Robots.txt support
• Distributed scraping
• Configuration via environment variables
• Extensions

Example

func main() {
	c := colly.NewCollector()

	// Find and visit all links
	c.OnHTML("a[href]", func(e *colly.HTMLElement) {
		e.Request.Visit(e.Attr("href"))
	})

	c.OnRequest(func(r *colly.Request) {
		fmt.Println("Visiting", r.URL)
	})

	c.Visit("http://go-colly.org/")
}

See examples folder for more detailed examples.

Installation

Add colly to your go.mod file:

module github.com/x/y

go 1.14

require (
        github.com/gocolly/colly/v2 latest
)

Bugs

Bugs or suggestions? Visit the issue tracker or join #colly on freenode

Other Projects Using Colly

Below is a list of public, open source projects that use Colly:

• greenpeace/check-my-pages Scraping script to test the Spanish Greenpeace web archive.
• altsab/gowap Wappalyzer implementation in Go.
• jesuiscamille/goquotes A quotes scrapper, making your day a little better!
• jivesearch/jivesearch A search engine that doesn't track you.
• Leagify/colly-draft-prospects A scraper for future NFL Draft prospects.
• lucasepe/go-ps4 Search playstation store for your favorite PS4 games using the command line.
• yringler/inside-chassidus-scraper Scrapes Rabbi Paltiel's web site for lesson metadata.
• gamedb/gamedb A database of Steam games.
• lawzava/scrape CLI for email scraping from any website.
• eureka101v/WeiboSpiderGo A sina weibo(chinese twitter) scrapper
• Go-phie/gophie Search, Download and Stream movies from your terminal
• imthaghost/goclone Clone websites to your computer within seconds.
• superiss/spidy Crawl the web and collect expired domains.
• docker-slim/docker-slim Optimize your Docker containers to make them smaller and better.
• seversky/gachifinder an agent for asynchronous scraping, parsing and writing to some storages(elasticsearch for now)
• eval-exec/goodreads crawl all tags and all pages of quotes from goodreads.

If you are using Colly in a project please send a pull request to add it to the list.

Contributors

This project exists thanks to all the people who contribute. [Contribute].

Backers

Thank you to all our backers!