omissis/kube-apiserver-proxy

package kube

import (
    "fmt"
    "strings"
)

const minURIComponentsCount = 3

var (
    ErrMalformedURI      = fmt.Errorf("uri has less than 3 parts in it")
    ErrURIIsNotSupported = fmt.Errorf("uri is not supported")
)

func GetGroupVersionFromURI(uri string) (string, string, error) {
    if uri == "/api" {
        return "core", "", nil
    }

    if strings.HasPrefix(uri, "/api/") {
        return "core", "v1", nil
    }

    if uri == "/apis" {
        return "apis", "", nil
    }

    if strings.HasPrefix(uri, "/apis/") {
        parts := strings.Split(strings.Trim(uri, "/"), "/")

        if len(parts) < minURIComponentsCount {
            return "", "", fmt.Errorf("%w '%s'", ErrMalformedURI, uri)
        }

        return parts[1], parts[2], nil
    }

    return "", "", fmt.Errorf("%w: '%s'", ErrURIIsNotSupported, uri)
}