(Tcl) 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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load ./chilkat.dll

set dns [new_CkDns]

set json [new_CkJsonObject]

CkJsonObject_put_EmitCompact $json 0

set success [CkDns_Query $dns "SOA" "x.com" $json]
if {$success == 0} then {
    puts [CkDns_lastErrorText $dns]
    delete_CkDns $dns
    delete_CkJsonObject $json
    exit
}

puts [CkJsonObject_emit $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

set i 0
set count_i [CkJsonObject_SizeOfArray $json "answer.soa"]
while {$i < $count_i} {
    CkJsonObject_put_I $json $i
    set name [CkJsonObject_stringOf $json "answer.soa[i].name"]
    set ttl [CkJsonObject_IntOf $json "answer.soa[i].ttl"]
    set mname [CkJsonObject_stringOf $json "answer.soa[i].mname"]
    set rname [CkJsonObject_stringOf $json "answer.soa[i].rname"]
    set serial [CkJsonObject_IntOf $json "answer.soa[i].serial"]
    set refresh [CkJsonObject_IntOf $json "answer.soa[i].refresh"]
    set retry [CkJsonObject_IntOf $json "answer.soa[i].retry"]
    set expire [CkJsonObject_IntOf $json "answer.soa[i].expire"]
    set minttl [CkJsonObject_IntOf $json "answer.soa[i].minttl"]
    set i [expr $i + 1]
}

delete_CkDns $dns
delete_CkJsonObject $json