B4X Requires Chilkat v9.5.0.96+

DNS Query A Records

See more DNS Examples

Shows how to perform a DNS query to retrieve A records. B4X

Dim success As Boolean = False

Dim dns As ChilkatDns
dns.Initialize("dns")

Dim json As ChilkatJsonObject
json.Initialize
json.EmitCompact = False

success = dns.Query("A", "microsoft.com", json)
If success = False Then
    Log(dns.LastErrorText)
    Return
End If


Log(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

Dim name As String
Dim ttl As Int
Dim ipv4 As String

Dim i As Int = 0
Dim count_i As Int = 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