lolibrary/lolibrary

package handler

import (
    "fmt"
    "regexp"
    "strings"

    "github.com/monzo/terrors"
)

var re = regexp.MustCompile(`^[a-z0-9][a-z0-9\-]{0,28}[a-z0-9]$`)

const serviceFormat = "s-api-%s.lolibrary.svc.cluster.local"

func parsePath(path string) (string, string, error) {
    switch path {
    case "", "/":
        return "", "", terrors.NotFound("service", "No endpoint was given", nil)
    }

    parts := strings.SplitN(strings.TrimPrefix(path, "/"), "/", 2)
    if len(parts) != 2 {
        parts = append(parts, "")
    }

    // validate the service is alpha-with-dashes only.
    if !re.MatchString(parts[0]) {
        return "", "", terrors.BadRequest("service", "Endpoint is invalid", map[string]string{
            "service": parts[0],
        })
    }

    return fmt.Sprintf(serviceFormat, parts[0]), "/" + parts[1], nil
}