Swift

Resolve Domain to IP Address

See more DNS Examples

Demonstrates how to perform a DNS query to obtain A records for resolving a domain name to an IPv4 address. Swift

func chilkatTest() {
    var success: Bool = false

    let dns = CkoDns()!

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

    success = dns.query(recordType: "A", domain: "microsoft.com", answer: json)
    if success == false {
        print("\(dns.lastErrorText!)")
        return
    }

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

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

    // {
    //   "answer": {
    //     "a": [
    //       {
    //         "name": "microsoft.com",
    //         "ttl": 1528,
    //         "ipv4": "20.112.250.133"
    //       },
    //       {
    //         "name": "microsoft.com",
    //         "ttl": 1528,
    //         "ipv4": "20.231.239.246"
    //       },
    //       {
    //         "name": "microsoft.com",
    //         "ttl": 1528,
    //         "ipv4": "20.76.201.171"
    //       },
    //       {
    //         "name": "microsoft.com",
    //         "ttl": 1528,
    //         "ipv4": "20.70.246.20"
    //       },
    //       {
    //         "name": "microsoft.com",
    //         "ttl": 1528,
    //         "ipv4": "20.236.44.162"
    //       }
    //     ]
    //   }
    // }

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

    var name: String?
    var ttl: Int
    var ipv4: String?

    var i: Int = 0
    var count_i: Int = json.size(ofArray: "answer.a").intValue
    while i < count_i {
        json.i = i
        name = json.string(of: "answer.a[i].name")
        ttl = json.int(of: "answer.a[i].ttl").intValue
        ipv4 = json.string(of: "answer.a[i].ipv4")
        i = i + 1
    }


}