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asset.go
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asset.go
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package goadmin
import (
"github.com/pkg/errors"
"io/ioutil"
"net/http"
"os"
"path/filepath"
)
var (
js = []AssetSource{
{
Path: "plugins/jquery/jquery-3.4.1.min.js",
URL: "https://code.jquery.com/jquery-3.4.1.min.js",
},
{
Path: "plugins/bootstrap/js/bootstrap.min.js",
URL: "https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js",
},
}
css = []AssetSource{
{
Path: "plugins/bootstrap/css/bootstrap.min.css",
URL: "https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css",
},
{
Path: "css/style.css",
URL: "",
},
}
)
type AssetSource struct {
Path string
URL string
}
func (admin *Admin) LoadAssets() error {
for _, source := range js {
err := admin.loadAsset(source)
if err != nil {
// todo: wrap error
return err
}
}
for _, source := range css {
err := admin.loadAsset(source)
if err != nil {
// todo: wrap error
return err
}
}
return nil
}
func (admin Admin) loadAsset(source AssetSource) error {
assetPath := filepath.Join(admin.AssetsPath, source.Path)
_, err := os.Stat(assetPath)
if err != nil && !os.IsNotExist(err) {
return errors.Wrapf(err, "loading asset %s (%s) source failed",
source.Path, source.URL,
)
}
if os.IsNotExist(err) {
assetDir := filepath.Dir(assetPath)
err = os.MkdirAll(assetDir, os.ModePerm)
if err != nil {
return errors.Wrapf(err, "make assets dir %s failed",
assetDir,
)
}
resp, err := http.Get(source.URL)
if err != nil {
return errors.Wrapf(err, "loading asset source from url %s failed", source.URL)
}
defer func() {
_ = resp.Body.Close()
}()
b, err := ioutil.ReadAll(resp.Body)
if err != nil {
// todo: wrap error
return err
}
err = ioutil.WriteFile(assetPath, b, os.ModePerm)
if err != nil {
// todo: wrap error
return err
}
}
return nil
}