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
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/")
}