/
image.go
180 lines (141 loc) · 3.38 KB
/
image.go
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package djinn
import (
"bytes"
"encoding/json"
"errors"
"io"
"net/http"
"net/url"
"strconv"
)
type Image struct {
ID int64 `json:"id"`
AuthorID int64 `json:"author_id"`
UserID int64 `json:"user_id"`
NamespaceID NullInt64 `json:"namespace_id"`
Driver Driver `json:"driver"`
Name string `json:"name"`
CreatedAt Time `json:"created_at"`
URL URL `json:"url"`
Download *ImageDownload `json:"download"`
}
type ImageDownload struct {
Source URL `json:"source"`
Error NullString `json:"error"`
CreatedAt Time `json:"created_at"`
StartedAt NullTime `json:"started_at"`
FinishedAt NullTime `json:"finished_at"`
}
type ImageParams struct {
Namespace string `json:"namespace"`
Image io.Reader `json:"-"`
Name string `json:"name"`
DownloadURL string `json:"download_url"`
}
type Driver uint8
//go:generate stringer -type Driver -linecomment
const (
DriverSSH Driver = iota // ssh
DriverQEMU // qemu
DriverDocker // docker
)
func (d *Driver) MarshalJSON() ([]byte, error) {
return []byte(d.String()), nil
}
func (d *Driver) UnmarshalJSON(p []byte) error {
var s string
if err := json.Unmarshal(p, &s); err != nil {
return err
}
switch s {
case "ssh":
(*d) = DriverSSH
case "qemu":
(*d) = DriverQEMU
case "docker":
(*d) = DriverDocker
default:
return errors.New("unknown image driver " + s)
}
return nil
}
func CreateImage(cli *Client, p ImageParams) (*Image, error) {
endpoint := "/images"
var (
contentType string
body io.Reader
)
if p.Image != nil {
vals := url.Values(make(map[string][]string))
vals.Set("namespace", p.Namespace)
vals.Set("name", p.Name)
endpoint += "?" + vals.Encode()
contentType = "application/x-qemu-disk"
body = p.Image
} else {
var buf bytes.Buffer
if err := json.NewEncoder(&buf).Encode(p); err != nil {
return nil, err
}
contentType = "application/json; charset=utf-8"
body = &buf
}
resp, err := cli.Post(endpoint, contentType, body)
if err != nil {
return nil, err
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusCreated {
return nil, cli.err(resp)
}
var i Image
if err := json.NewDecoder(resp.Body).Decode(&i); err != nil {
return nil, err
}
return &i, nil
}
func GetImage(cli *Client, id int64) (*Image, error) {
resp, err := cli.Get("/images/"+strconv.FormatInt(id, 10), "application/json; charset=utf-8")
if err != nil {
return nil, err
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
return nil, cli.err(resp)
}
var i Image
if err := json.NewDecoder(resp.Body).Decode(&i); err != nil {
return nil, err
}
return &i, nil
}
func (i *Image) Get(cli *Client) error {
i2, err := GetImage(cli, i.ID)
if err != nil {
return err
}
(*i) = (*i2)
return nil
}
func (i *Image) Data(cli *Client) (io.ReadCloser, error) {
resp, err := cli.Get(i.URL.Path, "application/x-qemu-disk")
if err != nil {
return nil, err
}
if resp.StatusCode != http.StatusOK {
defer resp.Body.Close()
return nil, cli.err(resp)
}
return resp.Body, nil
}
func (i *Image) Delete(cli *Client) error {
resp, err := cli.Delete(i.URL.Path)
if err != nil {
return err
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusNoContent {
return cli.err(resp)
}
return nil
}