我之前已经在C＃中解析了JSON，但是这次我将在Node-Red中使用JavaScript。
我已经在网上搜索并找到了几种使用JavaScript解析JSON的解决方案，但在所有示例中，JSON都非常简单，并且其中没有很多“级别”的数据。
我将提供需要解析的JSON文件的一小部分
{
"programStatus": {
"modified_host_attributes": "1",
"modified_service_attributes": "1",
"serial_host_check_stats": "0,0,0"
},
"hosts": {
"FILANAS01": {
"host_name": "FILANAS01",
"modified_attributes": "0",
"check_command": "check-host-alive",
"current_state": "0",
"scheduled_downtime_depth": "0"
},
"FILANAS02": {
"host_name": "FILANAS02",
"modified_attributes": "0",
"check_command": "check-host-alive",
"current_state": "0",
"scheduled_downtime_depth": "0"
},
"FILANSW01": {
"host_name": "FILANSW01",
"modified_attributes": "0",
"check_command": "check-host-alive",
"scheduled_downtime_depth": "0"
},
"FILANSW02": {
"host_name": "FILANSW02",
"modified_attributes": "0",
"check_command": "check-host-alive",
"current_state": "0",
"scheduled_downtime_depth": "0"
}
},
"services": {
"FILANSW01": {
"HP ProCurve Hardware Check": {
"host_name": "FILANSW01",
"current_state": "0",
"scheduled_downtime_depth": "0"
},
"System Location": {
"host_name": "FILANSW01",
"current_state": "0",
"scheduled_downtime_depth": "0"
}
},
"FILANSW02": {
"HP ProCurve Hardware Check": {
"host_name": "FILANSW02",
"current_state": "0",
"scheduled_downtime_depth": "0"
},
"System Location": {
"host_name": "FILANSW02",
"current_state": "0",
"scheduled_downtime_depth": "0"
}
},
"FILASDC02": {
"Active Directory Domain Services": {
"host_name": "FILASDC02",
"current_state": "0",
"scheduled_downtime_depth": "0"
},
"CPU Load": {
"host_name": "FILASDC02",
"current_state": "0",
"scheduled_downtime_depth": "0"
},
"DNS Server": {
"host_name": "FILASDC02",
"current_state": "0",
"scheduled_downtime_depth": "0"
},
"Drive Space C:": {
"host_name": "FILASDC02",
"current_state": "0",
"scheduled_downtime_depth": "0"
}
}
}
}
这是从Nagios生成的，它包含服务器和交换机以及有关它们的信息。
我需要遍历所有“主机”，然后查看“ current_state”是什么，如果它是其他值，则为0，那么我将从该“主机”中获取“ host_name”和其他信息。
如果“服务”的状态不为0，则检查当前状态。
然后，我将创建一个数组，其中包含我从此JSON中获取的信息，并将其显示在信息屏幕上。
但是我需要一些帮助来开始使用JSON。
谢谢。
最佳答案
Assign the entire JSON in a JavaScript variable, complete code shown below:
`
var myJSON = {
“ programStatus”：{
“ modified_host_attributes”：“ 1”，
“ modified_service_attributes”：“ 1”，
“ serial_host_check_stats”：“ 0,0,0”
}，
“主持人”：{
“ FILANAS01”：{
“ host_name”：“ FILANAS01”，
“ modified_attributes”：“ 0”，
“ check_command”：“检查主机有效”，
“ current_state”：“ 0”，
“ scheduled_downtime_depth”：“ 0”
}，
“ FILANAS02”：{
“ host_name”：“ FILANAS02”，
“ modified_attributes”：“ 0”，
“ check_command”：“检查主机有效”，
“ current_state”：“ 0”，
“ scheduled_downtime_depth”：“ 0”
}，
“ FILANSW01”：{
“ host_name”：“ FILANSW01”，
“ modified_attributes”：“ 0”，
“ check_command”：“检查主机有效”，
“ scheduled_downtime_depth”：“ 0”
}，
“ FILANSW02”：{
“ host_name”：“ FILANSW02”，
“ modified_attributes”：“ 0”，
“ check_command”：“检查主机有效”，
“ current_state”：“ 0”，
“ scheduled_downtime_depth”：“ 0”
}
}，
“服务”： {
“ FILANSW01”：{
“ HP ProCurve硬件检查”：{
“ host_name”：“ FILANSW01”，
“ current_state”：“ 0”，
“ scheduled_downtime_depth”：“ 0”
}，
“系统位置”：{
“ host_name”：“ FILANSW01”，
“ current_state”：“ 0”，
“ scheduled_downtime_depth”：“ 0”
}
}，
“ FILANSW02”：{
“ HP ProCurve硬件检查”：{
“ host_name”：“ FILANSW02”，
“ current_state”：“ 0”，
“ scheduled_downtime_depth”：“ 0”
}，
“系统位置”：{
“ host_name”：“ FILANSW02”，
“ current_state”：“ 0”，
“ scheduled_downtime_depth”：“ 0”
}
}，
“ FILASDC02”：{
“ Active Directory域服务”：{
“ host_name”：“ FILASDC02”，
“ current_state”：“ 0”，
“ scheduled_downtime_depth”：“ 0”
}，
“ CPU负载”：{
“ host_name”：“ FILASDC02”，
“ current_state”：“ 0”，
“ scheduled_downtime_depth”：“ 0”
}，
“ DNS服务器”：{
“ host_name”：“ FILASDC02”，
“ current_state”：“ 0”，
“ scheduled_downtime_depth”：“ 0”
}，
“驱动器空间C：”：{
“ host_name”：“ FILASDC02”，
“ current_state”：“ 0”，
“ scheduled_downtime_depth”：“ 0”
}
}
}
}
Now iterate through:
var host = Object.keys(myJSON["hosts"]);
for (var i = 0; i < host.length; i++) {
var hostData = host[i];
var hostProp = myJSON.hosts[hostData];
if (hostProp.current_state != 0) {
//Do your work.
}
}
I've tested Object.keys() in a few browsers like IE9, IE10, Chrome 46
and FireFox, it works but fails in IE8.
关于javascript - 在Node-Red中解析JSON JavaScript，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/33155225/