| // Copyright 2015 The etcd Authors |
| // |
| // 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, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package types |
| |
| import ( |
| "errors" |
| "fmt" |
| "net" |
| "net/url" |
| "sort" |
| "strings" |
| ) |
| |
| type URLs []url.URL |
| |
| func NewURLs(strs []string) (URLs, error) { |
| all := make([]url.URL, len(strs)) |
| if len(all) == 0 { |
| return nil, 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, err |
| } |
| if u.Scheme != "http" && u.Scheme != "https" && u.Scheme != "unix" && u.Scheme != "unixs" { |
| return nil, fmt.Errorf("URL scheme must be http, https, unix, or unixs: %s", in) |
| } |
| if _, _, err := net.SplitHostPort(u.Host); err != nil { |
| return nil, fmt.Errorf(`URL address does not have the form "host:port": %s`, in) |
| } |
| if u.Path != "" { |
| return nil, fmt.Errorf("URL must not contain a path: %s", in) |
| } |
| all[i] = *u |
| } |
| us := URLs(all) |
| us.Sort() |
| |
| return us, nil |
| } |
| |
| func MustNewURLs(strs []string) URLs { |
| urls, err := NewURLs(strs) |
| if err != nil { |
| panic(err) |
| } |
| return urls |
| } |
| |
| func (us URLs) String() string { |
| return strings.Join(us.StringSlice(), ",") |
| } |
| |
| func (us *URLs) Sort() { |
| sort.Sort(us) |
| } |
| func (us URLs) Len() int { return len(us) } |
| func (us URLs) Less(i, j int) bool { return us[i].String() < us[j].String() } |
| func (us URLs) Swap(i, j int) { us[i], us[j] = us[j], us[i] } |
| |
| func (us URLs) StringSlice() []string { |
| out := make([]string, len(us)) |
| for i := range us { |
| out[i] = us[i].String() |
| } |
| |
| return out |
| } |