Go (RE2)

AWS ARN (Amazon Resource Name) in GO

Match AWS ARNs (Amazon Resource Names) across commercial, China, and GovCloud partitions.

Try it in the GO tester →

Pattern

regexGO
arn:(?:aws|aws-cn|aws-us-gov):[a-z0-9\-]+:[a-z0-9\-]*:\d{12}?:[\w\-\/.*:]+   (flags: g)

Go (RE2) code

goGo
package main

import (
	"fmt"
	"regexp"
)

func main() {
	re := regexp.MustCompile(`arn:(?:aws|aws-cn|aws-us-gov):[a-z0-9\-]+:[a-z0-9\-]*:\d{12}?:[\w\-\/.*:]+`)
	input := `Bucket arn:aws:s3:::my-app-bucket/path`
	for _, match := range re.FindAllString(input, -1) {
		fmt.Println(match)
	}
}

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

How the pattern works

arn:(?:aws|aws-cn|aws-us-gov): matches the ARN prefix and partition. [a-z0-9\-]+ matches the service (s3, lambda, iam, etc.). [a-z0-9\-]* matches the optional region (some services like IAM omit it). \d{12}? matches the 12-digit account ID (or omitted for some services). [\w\-\/.*:]+ matches the resource portion which varies wildly per service.

Examples

Input

Bucket arn:aws:s3:::my-app-bucket/path

Matches

  • arn:aws:s3:::my-app-bucket/path

Input

Lambda arn:aws:lambda:us-east-1:123456789012:function:hello

Matches

  • arn:aws:lambda:us-east-1:123456789012:function:hello

Input

no arns here

No match

—

Same pattern, other engines

JavaScript / ECMAScript

Supported

See how this pattern looks (and behaves) in JavaScript's built-in RegExp.

Python (re)

Supported

See how this pattern looks (and behaves) in Python's stdlib `re` module.

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