youtubebeat/vendor/github.com/gocolly/colly/README.md

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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.
[![GoDoc](https://godoc.org/github.com/gocolly/colly?status.svg)](https://godoc.org/github.com/gocolly/colly)
[![Backers on Open Collective](https://opencollective.com/colly/backers/badge.svg)](#backers) [![Sponsors on Open Collective](https://opencollective.com/colly/sponsors/badge.svg)](#sponsors) [![build status](https://img.shields.io/travis/gocolly/colly/master.svg?style=flat-square)](https://travis-ci.org/gocolly/colly)
[![report card](https://img.shields.io/badge/report%20card-a%2B-ff3333.svg?style=flat-square)](http://goreportcard.com/report/gocolly/colly)
[![view examples](https://img.shields.io/badge/learn%20by-examples-0077b3.svg?style=flat-square)](https://github.com/gocolly/colly/tree/master/_examples)
[![Code Coverage](https://img.shields.io/codecov/c/github/gocolly/colly/master.svg)](https://codecov.io/github/gocolly/colly?branch=master)
[![FOSSA Status](https://app.fossa.io/api/projects/git%2Bgithub.com%2Fgocolly%2Fcolly.svg?type=shield)](https://app.fossa.io/projects/git%2Bgithub.com%2Fgocolly%2Fcolly?ref=badge_shield)
[![Twitter URL](https://img.shields.io/badge/twitter-follow-green.svg)](https://twitter.com/gocolly)
## 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
```go
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](https://github.com/gocolly/colly/tree/master/_examples) for more detailed examples.
## Installation
```
go get -u github.com/gocolly/colly/...
```
## Bugs
Bugs or suggestions? Visit the [issue tracker](https://github.com/gocolly/colly/issues) 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](https://github.com/greenpeace/check-my-pages) Scraping script to test the Spanish Greenpeace web archive
* [altsab/gowap](https://github.com/altsab/gowap) Wappalyzer implementation in Go
* [jesuiscamille/goquotes](https://github.com/jesuiscamille/goquotes) A quotes scrapper, making your day a little better!
* [jivesearch/jivesearch](https://github.com/jivesearch/jivesearch) A search engine that doesn't track you.
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]](CONTRIBUTING.md).
<a href="https://github.com/gocolly/colly/graphs/contributors"><img src="https://opencollective.com/colly/contributors.svg?width=890" /></a>
## Backers
Thank you to all our backers! 🙏 [[Become a backer](https://opencollective.com/colly#backer)]
<a href="https://opencollective.com/colly#backers" target="_blank"><img src="https://opencollective.com/colly/backers.svg?width=890"></a>
## Sponsors
Support this project by becoming a sponsor. Your logo will show up here with a link to your website. [[Become a sponsor](https://opencollective.com/colly#sponsor)]
<a href="https://opencollective.com/colly/sponsor/0/website" target="_blank"><img src="https://opencollective.com/colly/sponsor/0/avatar.svg"></a>
<a href="https://opencollective.com/colly/sponsor/1/website" target="_blank"><img src="https://opencollective.com/colly/sponsor/1/avatar.svg"></a>
<a href="https://opencollective.com/colly/sponsor/2/website" target="_blank"><img src="https://opencollective.com/colly/sponsor/2/avatar.svg"></a>
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<a href="https://opencollective.com/colly/sponsor/4/website" target="_blank"><img src="https://opencollective.com/colly/sponsor/4/avatar.svg"></a>
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## License
[![FOSSA Status](https://app.fossa.io/api/projects/git%2Bgithub.com%2Fgocolly%2Fcolly.svg?type=large)](https://app.fossa.io/projects/git%2Bgithub.com%2Fgocolly%2Fcolly?ref=badge_large)