(Swift 2) Zoom API - Create JWT to Authenticate API Requests

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Creates a JWT for the Zoom API.

For more information, see https://marketplace.zoom.us/docs/api-reference/using-zoom-apis#using-jwt

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func chilkatTest() {
    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    // Use your API key and secret here...
    var apiKey: String? = "o9rw6Gq0RnqlkfaSqtCMOA"
    var apiSecret: String? = "UslmE23Kjh7at9z3If1xAHEyLmPDNxvxQrjR"

    // Create a JWT to authenticate Zoom API requests.
    let jwt = CkoJwt()

    let jose = CkoJsonObject()
    var success: Bool = jose.UpdateString("alg", value: "HS256")
    success = jose.UpdateString("typ", value: "JWT")

    // Build claims to look like this:
    // {"aud":null,"iss":"o9rw6Gq0RnqlkfaSqtCMOA","exp":1627651762,"iat":1627646363}
    let claims = CkoJsonObject()
    success = claims.UpdateString("iss", value: apiKey)
    success = claims.UpdateNull("aud")

    // Set the timestamp of when the JWT was created to now.
    var curDateTime: Int = jwt.GenNumericDate(0).intValue
    success = claims.AddIntAt(-1, name: "iat", value: curDateTime)

    // Set the timestamp defining an expiration time (end time) for the token
    // to be now + 1 month(3600 * 24 * 30 seconds)
    var oneMonth: Int = 3600 * 24 * 30
    success = claims.AddIntAt(-1, name: "exp", value: curDateTime + oneMonth)

    // Produce the smallest possible JWT:
    jwt.AutoCompact = true

    var strJwt: String? = jwt.CreateJwt(jose.Emit(), payload: claims.Emit(), password: apiSecret)

    print("\(strJwt!)")

    // Let's test the JWT to by sending the following request:

    // curl --request GET \
    //   --url 'https://api.zoom.us/v2/users?status=active&page_size=30&page_number=1' \
    //   --header 'authorization: Bearer { your_token }' \
    //   --header 'content-type: application/json

    let http = CkoHttp()

    // Implements the following CURL command:

    // curl --request GET \
    //   --url 'https://api.zoom.us/v2/users?status=active&page_size=30&page_number=1' \
    //   --header 'authorization: Bearer { your_token }' \
    //   --header 'content-type: application/json

    // Use the following online tool to generate HTTP code from a CURL command
    // Convert a cURL Command to HTTP Source Code

    http.SetRequestHeader("content-type", value: "application/json")
    // Adds the "Authorization: Bearer { your_token }" header.
    http.AuthToken = strJwt

    let sbResponseBody = CkoStringBuilder()
    success = http.QuickGetSb("https://api.zoom.us/v2/users?status=active&page_size=30&page_number=1", sbContent: sbResponseBody)
    if success == false {
        print("\(http.LastErrorText)")
        return
    }

    let jResp = CkoJsonObject()
    jResp.LoadSb(sbResponseBody)
    jResp.EmitCompact = false

    print("Response Body:")
    print("\(jResp.Emit())")

    var respStatusCode: Int = http.LastStatus.intValue
    print("Response Status Code = \(respStatusCode)")
    if respStatusCode >= 400 {
        print("Response Header:")
        print("\(http.LastHeader)")
        print("Failed.")
        return
    }

    // Sample output:

    // {
    //   "page_count": 1,
    //   "page_number": 1,
    //   "page_size": 30,
    //   "total_records": 1,
    //   "users": [
    //     {
    //       "id": "s8uAiMJiRmS_-eu1yOhKlg",
    //       "first_name": "Joe",
    //       "last_name": "Example",
    //       "email": "joe@example.com",
    //       "type": 1,
    //       "pmi": 5224934114,
    //       "timezone": "America/Chicago",
    //       "verified": 1,
    //       "created_at": "2021-07-30T11:56:37Z",
    //       "last_login_time": "2021-07-30T11:56:37Z",
    //       "language": "en-US",
    //       "phone_number": "",
    //       "status": "active",
    //       "role_id": "0"
    //     }
    //   ]
    // }

    // Sample code for parsing the JSON response...
    // Use the following online tool to generate parsing code from sample JSON:
    // Generate Parsing Code from JSON

    var id: String?
    var first_name: String?
    var last_name: String?
    var email: String?
    var v_type: Int
    var pmi: Int
    var timezone: String?
    var verified: Int
    var created_at: String?
    var last_login_time: String?
    var language: String?
    var phone_number: String?
    var status: String?
    var role_id: String?

    var page_count: Int = jResp.IntOf("page_count").intValue
    var page_number: Int = jResp.IntOf("page_number").intValue
    var page_size: Int = jResp.IntOf("page_size").intValue
    var total_records: Int = jResp.IntOf("total_records").intValue
    var i: Int = 0
    var count_i: Int = jResp.SizeOfArray("users").intValue
    while i < count_i {
        jResp.I = i
        id = jResp.StringOf("users[i].id")
        first_name = jResp.StringOf("users[i].first_name")
        last_name = jResp.StringOf("users[i].last_name")
        email = jResp.StringOf("users[i].email")
        v_type = jResp.IntOf("users[i].type").intValue
        pmi = jResp.IntOf("users[i].pmi").intValue
        timezone = jResp.StringOf("users[i].timezone")
        verified = jResp.IntOf("users[i].verified").intValue
        created_at = jResp.StringOf("users[i].created_at")
        last_login_time = jResp.StringOf("users[i].last_login_time")
        language = jResp.StringOf("users[i].language")
        phone_number = jResp.StringOf("users[i].phone_number")
        status = jResp.StringOf("users[i].status")
        role_id = jResp.StringOf("users[i].role_id")
        i = i + 1
    }


}