Networkingflags: g

Redis Connection URL

Match Redis connection URLs in both `redis://` and `rediss://` (TLS) forms, capturing user, password, host, port, and DB index.

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Available in

JavaScript / ECMAScript code

jsJavaScript

const re = new RegExp("rediss?:\\/\\/(?:([^:@\\s]+)(?::([^@\\s]*))?@)?([^:\\/\\s]+)(?::(\\d+))?(?:\\/(\\d+))?", "g");
const input = "REDIS_URL=redis://default:pass@redis.upstash.io:6379/0";
const matches = [...input.matchAll(re)];
console.log(matches.map(m => m[0]));

Uses `String.prototype.matchAll` for global iteration (Node 12+ / all modern browsers).

Python (re) code

pyPython

import re

pattern = re.compile(r"rediss?:\/\/(?:([^:@\s]+)(?::([^@\s]*))?@)?([^:\/\s]+)(?::(\d+))?(?:\/(\d+))?")
input_text = "REDIS_URL=redis://default:pass@redis.upstash.io:6379/0"
for m in pattern.finditer(input_text):
    print(m.group(0))

Stdlib `re` module — no third-party dependency. Works on Python 3.6+.

Go (RE2) code

goGo

package main

import (
	"fmt"
	"regexp"
)

func main() {
	re := regexp.MustCompile(`rediss?:\/\/(?:([^:@\s]+)(?::([^@\s]*))?@)?([^:\/\s]+)(?::(\d+))?(?:\/(\d+))?`)
	input := `REDIS_URL=redis://default:pass@redis.upstash.io:6379/0`
	for _, match := range re.FindAllString(input, -1) {
		fmt.Println(match)
	}
}

Uses `regexp.MustCompile` (panics on bad patterns at startup) and `FindAllString` for all matches.

Pattern

regexengine-agnostic

rediss?:\/\/(?:([^:@\s]+)(?::([^@\s]*))?@)?([^:\/\s]+)(?::(\d+))?(?:\/(\d+))?   (flags: g)

Raw source: rediss?:\/\/(?:([^:@\s]+)(?::([^@\s]*))?@)?([^:\/\s]+)(?::(\d+))?(?:\/(\d+))?

How it works

rediss?:\/\/ matches either scheme. The optional auth group captures user and optional password. The host group captures the hostname. (?::(\d+))? optionally captures the port. (?:\/(\d+))? optionally captures the database index (Redis databases are numeric).