package arn import ( "fmt" "strings" "github.com/aws/aws-sdk-go/aws/arn" ) // Resource provides the interfaces abstracting ARNs of specific resource // types. type Resource interface { GetARN() arn.ARN String() string } // ResourceParser provides the function for parsing an ARN's resource // component into a typed resource. type ResourceParser func(arn.ARN) (Resource, error) // ParseResource parses an AWS ARN into a typed resource for the S3 API. func ParseResource(s string, resParser ResourceParser) (resARN Resource, err error) { a, err := arn.Parse(s) if err != nil { return nil, err } if len(a.Partition) == 0 { return nil, InvalidARNError{ARN: a, Reason: "partition not set"} } if a.Service != "s3" && a.Service != "s3-outposts" { return nil, InvalidARNError{ARN: a, Reason: "service is not supported"} } if len(a.Resource) == 0 { return nil, InvalidARNError{ARN: a, Reason: "resource not set"} } return resParser(a) } // SplitResource splits the resource components by the ARN resource delimiters. func SplitResource(v string) []string { var parts []string var offset int for offset <= len(v) { idx := strings.IndexAny(v[offset:], "/:") if idx < 0 { parts = append(parts, v[offset:]) break } parts = append(parts, v[offset:idx+offset]) offset += idx + 1 } return parts } // IsARN returns whether the given string is an ARN func IsARN(s string) bool { return arn.IsARN(s) } // InvalidARNError provides the error for an invalid ARN error. type InvalidARNError struct { ARN arn.ARN Reason string } // Error returns a string denoting the occurred InvalidARNError func (e InvalidARNError) Error() string { return fmt.Sprintf("invalid Amazon %s ARN, %s, %s", e.ARN.Service, e.Reason, e.ARN.String()) }