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urlencoded.go
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/
urlencoded.go
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// Copyright (c) 2018 Palantir Technologies. All rights reserved.
//
// 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 codecs
import (
"bytes"
"fmt"
"io"
"io/ioutil"
"net/url"
)
const (
contentTypeFormURLEncoded = "application/x-www-form-urlencoded"
)
// FormURLEncoded (de)serializes Form parameters.
var FormURLEncoded Codec = codecFormURLEncoded{}
type codecFormURLEncoded struct{}
func (codecFormURLEncoded) Accept() string {
return contentTypeFormURLEncoded
}
func (codecFormURLEncoded) Decode(r io.Reader, v interface{}) error {
query, err := ioutil.ReadAll(r)
if err != nil {
return fmt.Errorf("failed to read all query bytes: %s", err.Error())
}
values, err := url.ParseQuery(string(query))
if err != nil {
return fmt.Errorf("failed to parse query: %s", err.Error())
}
dstValues, ok := v.(*url.Values)
if !ok {
return fmt.Errorf("could not decode, expected destination to be *url.Values, actual: %T", v)
}
*dstValues = values
return nil
}
func (c codecFormURLEncoded) Unmarshal(data []byte, v interface{}) error {
return c.Decode(bytes.NewBuffer(data), v)
}
func (codecFormURLEncoded) ContentType() string {
return contentTypeFormURLEncoded
}
func (codecFormURLEncoded) Encode(w io.Writer, v interface{}) error {
values, ok := v.(url.Values)
if !ok {
return fmt.Errorf("could not decode, expected destination to be url.Values, actual: %T", v)
}
encodedValue := values.Encode()
_, err := w.Write([]byte(encodedValue))
if err != nil {
return fmt.Errorf("failed to write encoded url.Values to writer: %s", err.Error())
}
return nil
}
func (c codecFormURLEncoded) Marshal(v interface{}) ([]byte, error) {
var buffer bytes.Buffer
err := c.Encode(&buffer, v)
if err != nil {
return nil, err
}
return buffer.Bytes(), nil
}