Classic ASP

Resolve Domain to IP Address

Demonstrates how to perform a DNS query to obtain A records for resolving a domain name to an IPv4 address.

Chilkat Classic ASP Downloads

Classic ASP

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%
success = 0

set dns = Server.CreateObject("Chilkat.Dns")

set json = Server.CreateObject("Chilkat.JsonObject")
json.EmitCompact = 0

success = dns.Query("A","microsoft.com",json)
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( dns.LastErrorText) & "</pre>"
    Response.End
End If

Response.Write "<pre>" & Server.HTMLEncode( json.Emit()) & "</pre>"

' 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

%>
</body>
</html>