(VBScript) DNS Query A Records

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Shows how to perform a DNS query to retrieve A records.

Note: This example requires Chilkat v9.5.0.96 or later.

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Dim fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
'Create a Unicode (utf-16) output text file.
Set outFile = fso.CreateTextFile("output.txt", True, True)

' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.Dns")
set dns = CreateObject("Chilkat.Dns")

' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.JsonObject")
set json = CreateObject("Chilkat.JsonObject")
json.EmitCompact = 0

success = dns.Query("A","microsoft.com",json)
If (success = 0) Then
    outFile.WriteLine(dns.LastErrorText)
    WScript.Quit
End If

outFile.WriteLine(json.Emit())

' Sample response.
' Parsing code below..

' {
'   "answer": {
'     "a": [
'       {
'         "name": "microsoft.com",
'         "ttl": 1528,
'         "ipv4": "20.112.250.133"
'       },
'       {
'         "name": "microsoft.com",
'         "ttl": 1528,
'         "ipv4": "20.231.239.246"
'       },
'       {
'         "name": "microsoft.com",
'         "ttl": 1528,
'         "ipv4": "20.76.201.171"
'       },
'       {
'         "name": "microsoft.com",
'         "ttl": 1528,
'         "ipv4": "20.70.246.20"
'       },
'       {
'         "name": "microsoft.com",
'         "ttl": 1528,
'         "ipv4": "20.236.44.162"
'       }
'     ]
'   }
' }

' Use this online tool to generate parsing code from sample JSON: 
' Generate Parsing Code from JSON

i = 0
count_i = json.SizeOfArray("answer.a")
Do While i < count_i
    json.I = i
    name = json.StringOf("answer.a[i].name")
    ttl = json.IntOf("answer.a[i].ttl")
    ipv4 = json.StringOf("answer.a[i].ipv4")
    i = i + 1
Loop

outFile.Close