github.com/pingcap/ticdc@v0.0.0-20220526033649-485a10ef2652/pkg/types/urls.go (about)

     1  // Copyright 2020 PingCAP, Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // See the License for the specific language governing permissions and
    12  // limitations under the License.
    13  
    14  package types
    15  
    16  import (
    17  	"net"
    18  	"net/url"
    19  	"sort"
    20  	"strings"
    21  
    22  	"github.com/pingcap/errors"
    23  	cerror "github.com/pingcap/ticdc/pkg/errors"
    24  )
    25  
    26  // URLs defines a slice of URLs as a type
    27  type URLs []url.URL
    28  
    29  // NewURLs return a URLs from a slice of formatted URL strings
    30  func NewURLs(strs []string) (URLs, error) {
    31  	all := make([]url.URL, len(strs))
    32  	if len(all) == 0 {
    33  		return nil, cerror.WrapError(cerror.ErrURLFormatInvalid, errors.New("no valid URLs given"))
    34  	}
    35  	for i, in := range strs {
    36  		in = strings.TrimSpace(in)
    37  		u, err := url.Parse(in)
    38  		if err != nil {
    39  			return nil, cerror.WrapError(cerror.ErrURLFormatInvalid, err)
    40  		}
    41  		if u.Scheme != "http" && u.Scheme != "https" && u.Scheme != "unix" && u.Scheme != "unixs" {
    42  			return nil, cerror.WrapError(cerror.ErrURLFormatInvalid,
    43  				errors.Errorf("URL scheme must be http, https, unix, or unixs: %s", in))
    44  		}
    45  		if _, _, err := net.SplitHostPort(u.Host); err != nil {
    46  			return nil, cerror.WrapError(cerror.ErrURLFormatInvalid,
    47  				errors.Errorf(`URL address does not have the form "host:port": %s`, in))
    48  		}
    49  		if u.Path != "" {
    50  			return nil, cerror.WrapError(cerror.ErrURLFormatInvalid,
    51  				errors.Errorf("URL must not contain a path: %s", in))
    52  		}
    53  		all[i] = *u
    54  	}
    55  	us := URLs(all)
    56  	sort.Slice(us, func(i, j int) bool { return us[i].String() < us[j].String() })
    57  
    58  	return us, nil
    59  }
    60  
    61  // String return a string of list of URLs witch separated by comma
    62  func (us URLs) String() string {
    63  	return strings.Join(us.StringSlice(), ",")
    64  }
    65  
    66  // StringSlice return a slice of formatted string of URL
    67  func (us URLs) StringSlice() []string {
    68  	out := make([]string, len(us))
    69  	for i := range us {
    70  		out[i] = us[i].String()
    71  	}
    72  
    73  	return out
    74  }