(Visual FoxPro) 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.

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LOCAL loDns
LOCAL loJson
LOCAL lnSuccess
LOCAL lcName
LOCAL lnTtl
LOCAL lcMname
LOCAL lcRname
LOCAL lnSerial
LOCAL lnRefresh
LOCAL lnRetry
LOCAL lnExpire
LOCAL lnMinttl
LOCAL i
LOCAL lnCount_i

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Dns')
loDns = CreateObject('Chilkat.Dns')

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.JsonObject')
loJson = CreateObject('Chilkat.JsonObject')
loJson.EmitCompact = 0

lnSuccess = loDns.Query("SOA","x.com",loJson)
IF (lnSuccess = 0) THEN
    ? loDns.LastErrorText
    RELEASE loDns
    RELEASE loJson
    CANCEL
ENDIF

? loJson.Emit()

* 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

i = 0
lnCount_i = loJson.SizeOfArray("answer.soa")
DO WHILE i < lnCount_i
    loJson.I = i
    lcName = loJson.StringOf("answer.soa[i].name")
    lnTtl = loJson.IntOf("answer.soa[i].ttl")
    lcMname = loJson.StringOf("answer.soa[i].mname")
    lcRname = loJson.StringOf("answer.soa[i].rname")
    lnSerial = loJson.IntOf("answer.soa[i].serial")
    lnRefresh = loJson.IntOf("answer.soa[i].refresh")
    lnRetry = loJson.IntOf("answer.soa[i].retry")
    lnExpire = loJson.IntOf("answer.soa[i].expire")
    lnMinttl = loJson.IntOf("answer.soa[i].minttl")
    i = i + 1
ENDDO

RELEASE loDns
RELEASE loJson