package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(?m)\s*(https?:\/\/\S+)\s*`)
var str = `hello world, testing https://stackoverflow.com/questions/ask this is prefix https://gmail.com final text`
var substitution = "\n$1\n"
fmt.Println(re.ReplaceAllString(str, substitution))
}
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/