FTP URL

const re = new RegExp("ftps?:\\/\\/(?:([^:@\\s]+)(?::([^@\\s]*))?@)?([^:\\/\\s]+)(?::(\\d+))?(?:\\/\\S*)?", "g");
const input = "Source: ftp://anon:guest@files.example.com/pub/data.csv";
const matches = [...input.matchAll(re)];
console.log(matches.map(m => m[0]));

import re

pattern = re.compile(r"ftps?:\/\/(?:([^:@\s]+)(?::([^@\s]*))?@)?([^:\/\s]+)(?::(\d+))?(?:\/\S*)?")
input_text = "Source: ftp://anon:guest@files.example.com/pub/data.csv"
for m in pattern.finditer(input_text):
    print(m.group(0))

package main

import (
	"fmt"
	"regexp"
)

func main() {
	re := regexp.MustCompile(`ftps?:\/\/(?:([^:@\s]+)(?::([^@\s]*))?@)?([^:\/\s]+)(?::(\d+))?(?:\/\S*)?`)
	input := `Source: ftp://anon:guest@files.example.com/pub/data.csv`
	for _, match := range re.FindAllString(input, -1) {
		fmt.Println(match)
	}
}