github.com/oam-dev/kubevela@v1.9.11/pkg/utils/url.go (about)

     1  /*
     2  Copyright 2021 The KubeVela Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8  	http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package utils
    18  
    19  import (
    20  	"fmt"
    21  	"net/url"
    22  	"path"
    23  	"regexp"
    24  )
    25  
    26  // ParseAPIServerEndpoint automatically construct the full url of APIServer
    27  // It will patch port and scheme if not exists
    28  func ParseAPIServerEndpoint(server string) (string, error) {
    29  	r := regexp.MustCompile(`^((?P<scheme>http|https)://)?(?P<host>[^:\s]+)(:(?P<port>[0-9]+))?$`)
    30  	if !r.MatchString(server) {
    31  		return "", fmt.Errorf("invalid endpoint url: %s", server)
    32  	}
    33  	var scheme, port, host string
    34  	results := r.FindStringSubmatch(server)
    35  	for i, name := range r.SubexpNames() {
    36  		switch name {
    37  		case "scheme":
    38  			scheme = results[i]
    39  		case "host":
    40  			host = results[i]
    41  		case "port":
    42  			port = results[i]
    43  		}
    44  	}
    45  	if scheme == "" {
    46  		if port == "80" {
    47  			scheme = "http"
    48  		} else {
    49  			scheme = "https"
    50  		}
    51  	}
    52  	if port == "" {
    53  		if scheme == "http" {
    54  			port = "80"
    55  		} else {
    56  			port = "443"
    57  		}
    58  	}
    59  	return fmt.Sprintf("%s://%s:%s", scheme, host, port), nil
    60  }
    61  
    62  // IsValidURL checks whether the given string is a valid URL or not
    63  func IsValidURL(strURL string) bool {
    64  	_, err := url.ParseRequestURI(strURL)
    65  	if err != nil {
    66  		return false
    67  	}
    68  	u, err := url.Parse(strURL)
    69  	if err != nil || u.Scheme == "" || u.Host == "" {
    70  		return false
    71  	}
    72  	return true
    73  }
    74  
    75  // JoinURL join baseURL and subPath to be new URL
    76  func JoinURL(baseURL, subPath string) (string, error) {
    77  	parsedURL, err := url.Parse(baseURL)
    78  	if err != nil {
    79  		return "", err
    80  	}
    81  	parsedURL.RawPath = path.Join(parsedURL.RawPath, subPath)
    82  	parsedURL.Path = path.Join(parsedURL.Path, subPath)
    83  	URL := parsedURL.String()
    84  	return URL, nil
    85  }