(PureBasic) DNS Query SOA Records

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

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

Chilkat PureBasic Module Download Chilkat PureBasic Module

IncludeFile "CkDns.pb"
IncludeFile "CkJsonObject.pb"

Procedure ChilkatExample()

    dns.i = CkDns::ckCreate()
    If dns.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    json.i = CkJsonObject::ckCreate()
    If json.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkJsonObject::setCkEmitCompact(json, 0)

    success.i = CkDns::ckQuery(dns,"SOA","x.com",json)
    If success = 0
        Debug CkDns::ckLastErrorText(dns)
        CkDns::ckDispose(dns)
        CkJsonObject::ckDispose(json)
        ProcedureReturn
    EndIf

    Debug CkJsonObject::ckEmit(json)

    ; Sample response.
    ; Parsing code below..

    ; {
    ;   "answer": {
    ;     "soa": [
    ;       {
    ;         "name": "x.com",
    ;         "ttl": 1800,
    ;         "mname": "alexia.ns.cloudflare.com",
    ;         "rname": "dns.cloudflare.com",
    ;         "serial": -1971124188,
    ;         "refresh": 10000,
    ;         "retry": 2400,
    ;         "expire": 604800,
    ;         "minttl": 1800
    ;       }
    ;     ]
    ;   }
    ; }

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

    name.s
    ttl.i
    mname.s
    rname.s
    serial.i
    refresh.i
    retry.i
    expire.i
    minttl.i

    i.i = 0
    count_i.i = CkJsonObject::ckSizeOfArray(json,"answer.soa")
    While i < count_i
        CkJsonObject::setCkI(json, i)
        name = CkJsonObject::ckStringOf(json,"answer.soa[i].name")
        ttl = CkJsonObject::ckIntOf(json,"answer.soa[i].ttl")
        mname = CkJsonObject::ckStringOf(json,"answer.soa[i].mname")
        rname = CkJsonObject::ckStringOf(json,"answer.soa[i].rname")
        serial = CkJsonObject::ckIntOf(json,"answer.soa[i].serial")
        refresh = CkJsonObject::ckIntOf(json,"answer.soa[i].refresh")
        retry = CkJsonObject::ckIntOf(json,"answer.soa[i].retry")
        expire = CkJsonObject::ckIntOf(json,"answer.soa[i].expire")
        minttl = CkJsonObject::ckIntOf(json,"answer.soa[i].minttl")
        i = i + 1
    Wend


    CkDns::ckDispose(dns)
    CkJsonObject::ckDispose(json)


    ProcedureReturn
EndProcedure