用grep发出错误的请求Curl

Question

我正在尝试使用grep在curl命令中显示Yarn组的列表。

current_group=$(curl -u "${ranger_admin}:${ranger_password}" \ "${ranger_host}/service/public/v2/api/service/${ranger_cluster}_${policyService}/policy/YARN%20${policyName}" | grep -Poz '(?:\G(?!^)",|"${groups}":\s*\[)\s*"\K[^"]+')
echo "${current_group}"

结果是：

curl: (22) The requested URL returned error: 404 Not Found
curl: (1) Protocol  http not supported or disabled in libcurl
curl: (22) The requested URL returned error: 400 Bad Request

我该如何解决？