Question

我之前在C＃中解析过JSON，但这次我将在Node-Red中使用JavaScript。我已经在网上搜索并找到了几个用JavaScript解析JSON的解决方案，但在所有例子中，JSON都非常简单，并且其中没有太多“级别”的数据。

我将提供我需要解析的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”并查看“current_state”是什么，如果它的其他内容然后是0然后我将从“主机”获取“host_name”和其他一些信息。

“服务”中的相同内容如果不是0则检查当前状态。

然后我将使用从此JSON获取的信息创建一个数组，并将其显示在信息屏幕上。

但我需要一些帮助才能开始使用JSON。感谢。

Answer 1

 Assign the entire JSON in a JavaScript variable, complete code shown below:

` var myJSON = { ＆＃34; programStatus＆＃34;：{ ＆＃34; modified_host_attributes＆＃34;：＆＃34; 1＆＃34;，＆＃34; modified_service_attributes＆＃34;：＆＃34; 1＆＃34;，＆＃34; serial_host_check_stats＆＃34;：＆＃34; 0,0,0＆＃34; }，＆＃34;主持人＆＃34;：{ ＆＃34; FILANAS01＆＃34;：{ ＆＃34; host_name＆＃34;：＆＃34; FILANAS01＆＃34;，＆＃34; modified_attributes＆＃34;：＆＃34; 0＆＃34;，＆＃34; check_command＆＃34;：＆＃34; check-host-alive＆＃34;，＆＃34; current_state＆＃34;：＆＃34; 0＆＃34;，＆＃34; scheduled_downtime_depth＆＃34;：＆＃34; 0＆＃34; }，＆＃34; FILANAS02＆＃34;：{ ＆＃34; host_name＆＃34;：＆＃34; FILANAS02＆＃34;，＆＃34; modified_attributes＆＃34;：＆＃34; 0＆＃34;，＆＃34; check_command＆＃34;：＆＃34; check-host-alive＆＃34;，＆＃34; current_state＆＃34;：＆＃34; 0＆＃34;，＆＃34; scheduled_downtime_depth＆＃34;：＆＃34; 0＆＃34; }，＆＃34; FILANSW01＆＃34;：{ ＆＃34; host_name＆＃34;：＆＃34; FILANSW01＆＃34;，＆＃34; modified_attributes＆＃34;：＆＃34; 0＆＃34;，＆＃34; check_command＆＃34;：＆＃34; check-host-alive＆＃34;，＆＃34; scheduled_downtime_depth＆＃34;：＆＃34; 0＆＃34; }，＆＃34; FILANSW02＆＃34;：{ ＆＃34; host_name＆＃34;：＆＃34; FILANSW02＆＃34;，＆＃34; modified_attributes＆＃34;：＆＃34; 0＆＃34;，＆＃34; check_command＆＃34;：＆＃34; check-host-alive＆＃34;，＆＃34; current_state＆＃34;：＆＃34; 0＆＃34;，＆＃34; scheduled_downtime_depth＆＃34;：＆＃34; 0＆＃34; } }，＆＃34;服务＆＃34;：{ ＆＃34; FILANSW01＆＃34;：{ ＆＃34; HP ProCurve硬件检查＆＃34;：{ ＆＃34; host_name＆＃34;：＆＃34; FILANSW01＆＃34;，＆＃34; current_state＆＃34;：＆＃34; 0＆＃34;，＆＃34; scheduled_downtime_depth＆＃34;：＆＃34; 0＆＃34; }，＆＃34;系统位置＆＃34;：{ ＆＃34; host_name＆＃34;：＆＃34; FILANSW01＆＃34;，＆＃34; current_state＆＃34;：＆＃34; 0＆＃34;，＆＃34; scheduled_downtime_depth＆＃34;：＆＃34; 0＆＃34; } }，＆＃34; FILANSW02＆＃34;：{ ＆＃34; HP ProCurve硬件检查＆＃34;：{ ＆＃34; host_name＆＃34;：＆＃34; FILANSW02＆＃34;，＆＃34; current_state＆＃34;：＆＃34; 0＆＃34;，＆＃34; scheduled_downtime_depth＆＃34;：＆＃34; 0＆＃34; }，＆＃34;系统位置＆＃34;：{ ＆＃34; host_name＆＃34;：＆＃34; FILANSW02＆＃34;，＆＃34; current_state＆＃34;：＆＃34; 0＆＃34;，＆＃34; scheduled_downtime_depth＆＃34;：＆＃34; 0＆＃34; } }，＆＃34; FILASDC02＆＃34;：{ ＆＃34; Active Directory域服务＆＃34;：{ ＆＃34; host_name＆＃34;：＆＃34; FILASDC02＆＃34;，＆＃34; current_state＆＃34;：＆＃34; 0＆＃34;，＆＃34; scheduled_downtime_depth＆＃34;：＆＃34; 0＆＃34; }，＆＃34; CPU负载＆＃34;：{ ＆＃34; host_name＆＃34;：＆＃34; FILASDC02＆＃34;，＆＃34; current_state＆＃34;：＆＃34; 0＆＃34;，＆＃34; scheduled_downtime_depth＆＃34;：＆＃34; 0＆＃34; }，＆＃34; DNS服务器＆＃34;：{ ＆＃34; host_name＆＃34;：＆＃34; FILASDC02＆＃34;，＆＃34; current_state＆＃34;：＆＃34; 0＆＃34;，＆＃34; scheduled_downtime_depth＆＃34;：＆＃34; 0＆＃34; }，＆＃34;驱动器空间C：＆＃34;：{ ＆＃34; host_name＆＃34;：＆＃34; FILASDC02＆＃34;，＆＃34; current_state＆＃34;：＆＃34; 0＆＃34;，＆＃34; scheduled_downtime_depth＆＃34;：＆＃34; 0＆＃34; } } } }

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.

解析Node-Red中的JSON javascript

1 个答案: