internal/build, rpc: add missing HTTP response body Close() calls (#29223)

Co-authored-by: Felix Lange <fjl@twurst.com>

internal/build/download.go

@@ -84,10 +84,12 @@ func (db *ChecksumDB) DownloadFile(url, dstPath string) error {
 	resp, err := http.Get(url)
 	if err != nil {
 		return fmt.Errorf("download error: %v", err)
-	} else if resp.StatusCode != http.StatusOK {
-		return fmt.Errorf("download error: status %d", resp.StatusCode)
 	}
 	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		return fmt.Errorf("download error: status %d", resp.StatusCode)
+	}
 	if err := os.MkdirAll(filepath.Dir(dstPath), 0755); err != nil {
 		return err
 	}

rpc/http.go

@@ -236,7 +236,7 @@ func (hc *httpConn) doRequest(ctx context.Context, msg interface{}) (io.ReadClos
 		if _, err := buf.ReadFrom(resp.Body); err == nil {
 			body = buf.Bytes()
 		}
-
+		resp.Body.Close()
 		return nil, HTTPError{
 			Status:     resp.Status,
 			StatusCode: resp.StatusCode,