package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(?m)^(?:https?:)?(?:\/\/)?(?:[^@\n]+@)?(?:www\.)?([^:\/\n]+)`)
var str = `https://play.google.com/store/apps/details?id=com.skgames.trafficracer%22
http://mplay.google.co.in/sadfask/asdkfals?dk=10
http://lplay.google.co.in/sadfask/asdkfals?dk=10
http://play.google.co.in/sadfask/asdkfals?dk=10
http://tplay.google.co.in/sadfask/asdkfals?dk=10?
http://www.google.co.in:/sadfask/asdkfals?dk=10
www.google.co.in/sadfask/asdkfals?dk=10
https://user:pass@google.com/?a=b#asdd
//mplay.google.co.in
-- Regular expression ^(?:https?:)?(?:\/\/)?(?:[^@\n]+@)?(?:www\.)?([^:\/\n]+)
-- used below extracts domain with subdomains out of a full url.
-- It skips protocol (ex: https:), "//", "@", www subdomain and
-- then captures everything (ex: domain) before ":" or "/" or end of line.`
for i, match := range re.FindAllString(str, -1) {
fmt.Println(match, "found at index", i)
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Golang, please visit: https://golang.org/pkg/regexp/