44 lines
986 B
Go
44 lines
986 B
Go
package apt
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"io"
|
|
"net/http"
|
|
"os"
|
|
"path/filepath"
|
|
)
|
|
|
|
// fetchBytes performs a GET request and returns the response body.
|
|
func fetchBytes(ctx context.Context, httpClient *http.Client, url string) ([]byte, error) {
|
|
req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
resp, err := httpClient.Do(req)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer resp.Body.Close()
|
|
|
|
if resp.StatusCode != http.StatusOK {
|
|
return nil, fmt.Errorf("HTTP %d for %s", resp.StatusCode, url)
|
|
}
|
|
return io.ReadAll(resp.Body)
|
|
}
|
|
|
|
// atomicWrite writes data to path via a temporary file and an atomic rename.
|
|
func atomicWrite(path string, data []byte) error {
|
|
if err := os.MkdirAll(filepath.Dir(path), 0o755); err != nil {
|
|
return err
|
|
}
|
|
tmp := path + ".tmp"
|
|
if err := os.WriteFile(tmp, data, 0o644); err != nil {
|
|
return err
|
|
}
|
|
if err := os.Rename(tmp, path); err != nil {
|
|
os.Remove(tmp)
|
|
return err
|
|
}
|
|
return nil
|
|
}
|