curl獲取HTTP返回狀態碼

• -o /dev/null 屏蔽原有輸出信息
• -s silent
• -w %{http_code} 控制額外輸出
• -I 僅測試HTTP頭
• -m 10 最多查詢10s

#!/bin/bash
status_code=curl -I -m 10 -o /dev/null -s -w %{http_code} www.baidu.com

#!/bin/bash
status_code=$(curl -H "Content-Type: application/json" -o /dev/null -s -w %{htt
p_code} -XPUT -d '
{
    "type": "fs",
    "settings": {
        "location": "'${NFS_DIR}'/'${REPO_DIR}'",
        "max_snapshot_bytes_per_sec": "50mb",
        "max_restore_bytes_per_sec": "50mb"
    }
}' ${ES_URL}/_snapshot/${REPO_DIR})