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dex/vendor/github.com/mbanzon/simplehttp/payloads.go

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2015-08-18 05:57:27 +05:30
package simplehttp
import (
"bytes"
"io"
"mime/multipart"
"net/url"
"os"
"path"
)
type keyValuePair struct {
key string
value string
}
type keyNameRC struct {
key string
name string
value io.ReadCloser
}
type Payload interface {
GetPayloadBuffer() (*bytes.Buffer, error)
GetContentType() string
}
type RawPayload struct {
Data []byte
}
type FormDataPayload struct {
contentType string
Values []keyValuePair
Files []keyValuePair
ReadClosers []keyNameRC
}
type UrlEncodedPayload struct {
Values []keyValuePair
}
func NewRawPayload(data []byte) *RawPayload {
return &RawPayload{Data: data}
}
func (r *RawPayload) GetPayloadBuffer() (*bytes.Buffer, error) {
data := &bytes.Buffer{}
c, err := data.Write(r.Data)
if c != len(r.Data) || err != nil {
return data, err
}
return data, nil
}
func (r *RawPayload) GetContentType() string {
return ""
}
func NewFormDataPayload() *FormDataPayload {
return &FormDataPayload{}
}
func (f *FormDataPayload) AddValue(key, value string) {
f.Values = append(f.Values, keyValuePair{key: key, value: value})
}
func (f *FormDataPayload) AddFile(key, file string) {
f.Files = append(f.Files, keyValuePair{key: key, value: file})
}
func (f *FormDataPayload) AddReadCloser(key, name string, rc io.ReadCloser) {
f.ReadClosers = append(f.ReadClosers, keyNameRC{key: key, name: name, value: rc})
}
func (f *FormDataPayload) GetPayloadBuffer() (*bytes.Buffer, error) {
data := &bytes.Buffer{}
writer := multipart.NewWriter(data)
defer writer.Close()
for _, keyVal := range f.Values {
if tmp, err := writer.CreateFormField(keyVal.key); err == nil {
tmp.Write([]byte(keyVal.value))
} else {
return nil, err
}
}
for _, file := range f.Files {
if tmp, err := writer.CreateFormFile(file.key, path.Base(file.value)); err == nil {
if fp, err := os.Open(file.value); err == nil {
defer fp.Close()
io.Copy(tmp, fp)
} else {
return nil, err
}
} else {
return nil, err
}
}
for _, file := range f.ReadClosers {
if tmp, err := writer.CreateFormFile(file.key, file.name); err == nil {
defer file.value.Close()
io.Copy(tmp, file.value)
} else {
return nil, err
}
}
f.contentType = writer.FormDataContentType()
return data, nil
}
func (f *FormDataPayload) GetContentType() string {
if f.contentType == "" {
f.GetPayloadBuffer()
}
return f.contentType
}
func NewUrlEncodedPayload() *UrlEncodedPayload {
return &UrlEncodedPayload{}
}
func (f *UrlEncodedPayload) AddValue(key, value string) {
f.Values = append(f.Values, keyValuePair{key: key, value: value})
}
func (f *UrlEncodedPayload) GetPayloadBuffer() (*bytes.Buffer, error) {
data := url.Values{}
for _, keyVal := range f.Values {
data.Add(keyVal.key, keyVal.value)
}
return bytes.NewBufferString(data.Encode()), nil
}
func (f *UrlEncodedPayload) GetContentType() string {
return "application/x-www-form-urlencoded"
}