B4X

DNS Query TXT Records

See more DNS Examples

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

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

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("TXT", "x.com", json)
If success = False Then
    Log(dns.LastErrorText)
    Return
End If


Log(json.Emit)

'  Sample response.
'  Parsing code below..

'  {
'    "answer": {
'      "txt": [
'        {
'          "name": "x.com",
'          "ttl": 300,
'          "text": "kkdl3qb3tcrmdhfsm803p67r0my0svs8"
'        },
'        {
'          "name": "x.com",
'          "ttl": 300,
'          "text": "v=spf1 ip4:199.16.156.128/26 ip4:199.59.150.64/26 include:_spf.google.com include:spf-008d0a01.pphosted.com -all"
'        },
'        {
'          "name": "x.com",
'          "ttl": 300,
'          "text": "google-site-verification=8yQmoVhQedzlt36RPeQP41ytrEFk9aHEnde_xm0626g"
'        },
'        {
'          "name": "x.com",
'          "ttl": 300,
'          "text": "google-site-verification=F6u9mGL--d2lbLljvH3b1UUgXtevQPdcamKr9c8914A"
'        }
'      ]
'    }
'  }

'  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 text As String

Dim i As Int = 0
Dim count_i As Int = json.SizeOfArray("answer.txt")
Do While i < count_i
    json.I = i
    name = json.StringOf("answer.txt[i].name")
    ttl = json.IntOf("answer.txt[i].ttl")
    text = json.StringOf("answer.txt[i].text")
    i = i + 1
Loop