(Swift 3,4,5...) DNS Query CAA Records

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

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

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func chilkatTest() {
    let dns = CkoDns()!

    let json = CkoJsonObject()!
    json.emitCompact = false

    var success: Bool = dns.query("CAA", domain: "zoom.us", answer: json)
    if success == false {
        print("\(dns.lastErrorText!)")
        return
    }

    print("\(json.emit()!)")

    // Sample response.
    // Parsing code below..

    // {
    //   "answer": {
    //     "caa": [
    //       {
    //         "name": "zoom.us",
    //         "ttl": 300,
    //         "flags": 0,
    //         "tag": "iodef",
    //         "value": "mailto:security@zoom.us"
    //       },
    //       {
    //         "name": "zoom.us",
    //         "ttl": 300,
    //         "flags": 0,
    //         "tag": "issue",
    //         "value": "amazon.com"
    //       },
    //       {
    //         "name": "zoom.us",
    //         "ttl": 300,
    //         "flags": 0,
    //         "tag": "issue",
    //         "value": "digicert.com"
    //       },
    //       {
    //         "name": "zoom.us",
    //         "ttl": 300,
    //         "flags": 0,
    //         "tag": "issue",
    //         "value": "godaddy.com"
    //       },
    //       {
    //         "name": "zoom.us",
    //         "ttl": 300,
    //         "flags": 0,
    //         "tag": "issue",
    //         "value": "letsencrypt.org"
    //       },
    //       {
    //         "name": "zoom.us",
    //         "ttl": 300,
    //         "flags": 0,
    //         "tag": "issue",
    //         "value": "pki.goog"
    //       },
    //       {
    //         "name": "zoom.us",
    //         "ttl": 300,
    //         "flags": 0,
    //         "tag": "issue",
    //         "value": "sectigo.com"
    //       }
    //     ]
    //   }
    // }

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

    var name: String?
    var ttl: Int
    var flags: Int
    var tag: String?
    var value: String?

    var i: Int = 0
    var count_i: Int = json.size(ofArray: "answer.caa").intValue
    while i < count_i {
        json.i = i
        name = json.string(of: "answer.caa[i].name")
        ttl = json.int(of: "answer.caa[i].ttl").intValue
        flags = json.int(of: "answer.caa[i].flags").intValue
        tag = json.string(of: "answer.caa[i].tag")
        value = json.string(of: "answer.caa[i].value")
        i = i + 1
    }


}