1package protocol
2
3import (
4	"io"
5	"io/ioutil"
6	"net/http"
7
8	"github.com/aws/aws-sdk-go/aws"
9	"github.com/aws/aws-sdk-go/aws/client/metadata"
10	"github.com/aws/aws-sdk-go/aws/request"
11)
12
13// PayloadUnmarshaler provides the interface for unmarshaling a payload's
14// reader into a SDK shape.
15type PayloadUnmarshaler interface {
16	UnmarshalPayload(io.Reader, interface{}) error
17}
18
19// HandlerPayloadUnmarshal implements the PayloadUnmarshaler from a
20// HandlerList. This provides the support for unmarshaling a payload reader to
21// a shape without needing a SDK request first.
22type HandlerPayloadUnmarshal struct {
23	Unmarshalers request.HandlerList
24}
25
26// UnmarshalPayload unmarshals the io.Reader payload into the SDK shape using
27// the Unmarshalers HandlerList provided. Returns an error if unable
28// unmarshaling fails.
29func (h HandlerPayloadUnmarshal) UnmarshalPayload(r io.Reader, v interface{}) error {
30	req := &request.Request{
31		HTTPRequest: &http.Request{},
32		HTTPResponse: &http.Response{
33			StatusCode: 200,
34			Header:     http.Header{},
35			Body:       ioutil.NopCloser(r),
36		},
37		Data: v,
38	}
39
40	h.Unmarshalers.Run(req)
41
42	return req.Error
43}
44
45// PayloadMarshaler provides the interface for marshaling a SDK shape into and
46// io.Writer.
47type PayloadMarshaler interface {
48	MarshalPayload(io.Writer, interface{}) error
49}
50
51// HandlerPayloadMarshal implements the PayloadMarshaler from a HandlerList.
52// This provides support for marshaling a SDK shape into an io.Writer without
53// needing a SDK request first.
54type HandlerPayloadMarshal struct {
55	Marshalers request.HandlerList
56}
57
58// MarshalPayload marshals the SDK shape into the io.Writer using the
59// Marshalers HandlerList provided. Returns an error if unable if marshal
60// fails.
61func (h HandlerPayloadMarshal) MarshalPayload(w io.Writer, v interface{}) error {
62	req := request.New(
63		aws.Config{},
64		metadata.ClientInfo{},
65		request.Handlers{},
66		nil,
67		&request.Operation{HTTPMethod: "PUT"},
68		v,
69		nil,
70	)
71
72	h.Marshalers.Run(req)
73
74	if req.Error != nil {
75		return req.Error
76	}
77
78	io.Copy(w, req.GetBody())
79
80	return nil
81}
82