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package sling
import (
"bytes"
"encoding/json"
"io"
"strings"
goquery "github.com/google/go-querystring/query"
)
// BodyProvider provides Body content for http.Request attachment.
type BodyProvider interface {
// ContentType returns the Content-Type of the body.
ContentType() string
// Body returns the io.Reader body.
Body() (io.Reader, error)
}
// bodyProvider provides the wrapped body value as a Body for reqests.
type bodyProvider struct {
body io.Reader
}
func (p bodyProvider) ContentType() string {
return ""
}
func (p bodyProvider) Body() (io.Reader, error) {
return p.body, nil
}
// jsonBodyProvider encodes a JSON tagged struct value as a Body for requests.
// See https://golang.org/pkg/encoding/json/#MarshalIndent for details.
type jsonBodyProvider struct {
payload interface{}
}
func (p jsonBodyProvider) ContentType() string {
return jsonContentType
}
func (p jsonBodyProvider) Body() (io.Reader, error) {
buf := &bytes.Buffer{}
err := json.NewEncoder(buf).Encode(p.payload)
if err != nil {
return nil, err
}
return buf, nil
}
// formBodyProvider encodes a url tagged struct value as Body for requests.
// See https://godoc.org/github.com/google/go-querystring/query for details.
type formBodyProvider struct {
payload interface{}
}
func (p formBodyProvider) ContentType() string {
return formContentType
}
func (p formBodyProvider) Body() (io.Reader, error) {
values, err := goquery.Values(p.payload)
if err != nil {
return nil, err
}
return strings.NewReader(values.Encode()), nil
}
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