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urls.go
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urls.go
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// Copyright 2020 PingCAP, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// See the License for the specific language governing permissions and
// limitations under the License.
package types
import (
"net"
"net/url"
"sort"
"strings"
"github.com/pingcap/errors"
cerror "github.com/tikv/migration/cdc/pkg/errors"
)
// URLs defines a slice of URLs as a type
type URLs []url.URL
// NewURLs return a URLs from a slice of formatted URL strings
func NewURLs(strs []string) (URLs, error) {
all := make([]url.URL, len(strs))
if len(all) == 0 {
return nil, cerror.WrapError(cerror.ErrURLFormatInvalid, errors.New("no valid URLs given"))
}
for i, in := range strs {
in = strings.TrimSpace(in)
u, err := url.Parse(in)
if err != nil {
return nil, cerror.WrapError(cerror.ErrURLFormatInvalid, err)
}
if u.Scheme != "http" && u.Scheme != "https" && u.Scheme != "unix" && u.Scheme != "unixs" {
return nil, cerror.WrapError(cerror.ErrURLFormatInvalid,
errors.Errorf("URL scheme must be http, https, unix, or unixs: %s", in))
}
if _, _, err := net.SplitHostPort(u.Host); err != nil {
return nil, cerror.WrapError(cerror.ErrURLFormatInvalid,
errors.Errorf(`URL address does not have the form "host:port": %s`, in))
}
if u.Path != "" {
return nil, cerror.WrapError(cerror.ErrURLFormatInvalid,
errors.Errorf("URL must not contain a path: %s", in))
}
all[i] = *u
}
us := URLs(all)
sort.Slice(us, func(i, j int) bool { return us[i].String() < us[j].String() })
return us, nil
}
// String return a string of list of URLs witch separated by comma
func (us URLs) String() string {
return strings.Join(us.StringSlice(), ",")
}
// StringSlice return a slice of formatted string of URL
func (us URLs) StringSlice() []string {
out := make([]string, len(us))
for i := range us {
out[i] = us[i].String()
}
return out
}