niki/vendor/github.com/go-openapi/jsonreference/internal/normalize_url.go

package internal

import (
	"net/url"
	"regexp"
	"strings"
)

const (
	defaultHTTPPort = ":80"

	defaultHTTPSPort = ":443"
)

// Regular expressions used by the normalizations

var rxPort = regexp.MustCompile(`(:\d+)/?$`)

var rxDupSlashes = regexp.MustCompile(`/{2,}`)

// NormalizeURL will normalize the specified URL

// This was added to replace a previous call to the no longer maintained purell library:

// The call that was used looked like the following:

//

//	url.Parse(purell.NormalizeURL(parsed, purell.FlagsSafe|purell.FlagRemoveDuplicateSlashes))

//

// To explain all that was included in the call above, purell.FlagsSafe was really just the following:

//   - FlagLowercaseScheme

//   - FlagLowercaseHost

//   - FlagRemoveDefaultPort

//   - FlagRemoveDuplicateSlashes (and this was mixed in with the |)

//

// This also normalizes the URL into its urlencoded form by removing RawPath and RawFragment.

func NormalizeURL(u *url.URL) {

	lowercaseScheme(u)

	lowercaseHost(u)

	removeDefaultPort(u)

	removeDuplicateSlashes(u)

	u.RawPath = ""

	u.RawFragment = ""

}

func lowercaseScheme(u *url.URL) {

	if len(u.Scheme) > 0 {

		u.Scheme = strings.ToLower(u.Scheme)

	}

}

func lowercaseHost(u *url.URL) {

	if len(u.Host) > 0 {

		u.Host = strings.ToLower(u.Host)

	}

}

func removeDefaultPort(u *url.URL) {

	if len(u.Host) > 0 {

		scheme := strings.ToLower(u.Scheme)

		u.Host = rxPort.ReplaceAllStringFunc(u.Host, func(val string) string {

			if (scheme == "http" && val == defaultHTTPPort) || (scheme == "https" && val == defaultHTTPSPort) {

				return ""

			}

			return val

		})

	}

}

func removeDuplicateSlashes(u *url.URL) {

	if len(u.Path) > 0 {

		u.Path = rxDupSlashes.ReplaceAllString(u.Path, "/")

	}

}