forked from canonical/lxd
/
remote.go
124 lines (103 loc) · 2.69 KB
/
remote.go
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package main
import (
"encoding/json"
"fmt"
"io"
"os"
"github.com/lxc/lxd/shared"
)
func remoteGetImageFingerprint(d *Daemon, server string, alias string) (string, error) {
url := fmt.Sprintf("%s/%s/images/aliases/%s", server, shared.APIVersion, alias)
resp, err := d.httpGetSync(url)
if err != nil {
return "", err
}
var result shared.ImageAlias
if err = json.Unmarshal(resp.Metadata, &result); err != nil {
return "", fmt.Errorf("Error reading alias\n")
}
return result.Name, nil
}
func (d *Daemon) dbGetimage(fp string) int {
q := `SELECT id FROM images WHERE fingerprint=?`
id := -1
arg1 := []interface{}{fp}
arg2 := []interface{}{&id}
err := shared.DbQueryRowScan(d.db, q, arg1, arg2)
if err != nil {
return -1
}
return id
}
func ensureLocalImage(d *Daemon, server, fp string, secret string) error {
var url string
var exporturl string
if d.dbGetimage(fp) != -1 {
// already have it
return nil
}
/* grab the metadata from /1.0/images/%s */
if secret != "" {
url = fmt.Sprintf("%s/%s/images/%s?secret=%s", server, shared.APIVersion, fp, secret)
} else {
url = fmt.Sprintf("%s/%s/images/%s", server, shared.APIVersion, fp)
}
resp, err := d.httpGetSync(url)
if err != nil {
return nil
}
info := shared.ImageInfo{}
if err := json.Unmarshal(resp.Metadata, &info); err != nil {
return err
}
/* now grab the actual file from /1.0/images/%s/export */
if secret != "" {
exporturl = fmt.Sprintf("%s/%s/images/%s/export?secret=%s", server, shared.APIVersion, fp, secret)
} else {
exporturl = fmt.Sprintf("%s/%s/images/%s/export", server, shared.APIVersion, fp)
}
raw, err := d.httpGetFile(exporturl)
if err != nil {
return err
}
destDir := shared.VarPath("images")
err = os.MkdirAll(destDir, 0700)
if err != nil {
return err
}
destName := shared.VarPath("images", fp)
if _, err := os.Stat(destName); err == nil {
os.Remove(destName)
}
f, err := os.Create(destName)
if err != nil {
return err
}
var wr io.Writer
wr = f
_, err = io.Copy(wr, raw.Body)
f.Close()
if err != nil {
os.Remove(destName)
return err
}
q := `INSERT INTO images (fingerprint, filename, size, architecture, creation_date, expiry_date, upload_date) VALUES (?, ?, ?, ?, ?, ?, strftime("%s"))`
result, err := shared.DbExec(d.db, q, fp, info.Filename, info.Size, info.Architecture, info.CreationDate, info.ExpiryDate)
if err != nil {
os.Remove(destName)
return err
}
id64, err := result.LastInsertId()
if err != nil {
return err
}
id := int(id64)
for k, v := range info.Properties {
q := `INSERT INTO images_properties (image_id, type, key, value) VALUES (?, 0, ?, ?)`
_, err = shared.DbExec(d.db, q, id, k, v)
if err != nil {
return err
}
}
return nil
}