You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: canonicalize.go
    path of file: ./repos/scan4all/vendor/github.com/olivere/elastic
    
    the code of the file until where you have to start completion: // Copyright 2012-present Oliver Eilhard. All rights reserved.
// Use of this source code is governed by a MIT-license.
// See http://olivere.mit-license.org/license.txt for details.

package elastic

import (
	"net/url"
	"strings"
)

// canonicalize takes a list of URLs and returns its canonicalized form, i.e.
// remove anything but scheme, userinfo, host, path, and port.
// It also removes all trailing slashes. Invalid URLs or URLs that do not
// use protocol http or https are skipped.
//
// Example:
// http://127.0.0.1:9200/?query=1 -> http://127.0.0.1:9200
// http:/
    
func canonicalize(rawurls ...string) []string {
	var canonicalized []string
	for _, rawurl := range rawurls {
		u, err := url.Parse(rawurl)
		if err == nil {
			if u.Scheme == "http" || u.Scheme == "https" {
				// Trim trailing slashes. Notice that strings.TrimSuffix will only remove the last slash,
				// not all slashes from the suffix, so we'll loop over the path to remove all slashes.
				for strings.HasSuffix(u.Path, "/") {
					u.Path = u.Path[:len(u.Path)-1]
				}
				u.Fragment = ""
				u.RawQuery = ""
				canonicalized = append(canonicalized, u.String())
			}
		}
	}
	return canonicalized
}