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// Copyright 2015 The appc 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 (
"encoding/json"
"fmt"
"net/url"
)
// URL wraps url.URL to marshal/unmarshal to/from JSON strings and enforce
// that the scheme is HTTP/HTTPS only
type URL url.URL
func NewURL(s string) (*URL, error) {
uu, err := url.Parse(s)
if err != nil {
return nil, fmt.Errorf("bad URL: %v", err)
}
nu := URL(*uu)
if err := nu.assertValidScheme(); err != nil {
return nil, err
}
return &nu, nil
}
func (u URL) String() string {
uu := url.URL(u)
return uu.String()
}
func (u URL) assertValidScheme() error {
switch u.Scheme {
case "http", "https":
return nil
default:
return fmt.Errorf("bad URL scheme, must be http/https")
}
}
func (u *URL) UnmarshalJSON(data []byte) error {
var s string
if err := json.Unmarshal(data, &s); err != nil {
return err
}
nu, err := NewURL(s)
if err != nil {
return err
}
*u = *nu
return nil
}
func (u URL) MarshalJSON() ([]byte, error) {
if err := u.assertValidScheme(); err != nil {
return nil, err
}
return json.Marshal(u.String())
}
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