(VB.NET UWP/WinRT) 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

Chilkat Universal Windows Platform (UWP) / WinRT Downloads Chilkat for the Universal Windows Platform (UWP)

' 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...
Dim apiKey As String = "o9rw6Gq0RnqlkfaSqtCMOA"
Dim apiSecret As String = "UslmE23Kjh7at9z3If1xAHEyLmPDNxvxQrjR"

' Create a JWT to authenticate Zoom API requests.
Dim jwt As New Chilkat.Jwt

Dim jose As New Chilkat.JsonObject
Dim success As Boolean = jose.UpdateString("alg","HS256")
success = jose.UpdateString("typ","JWT")

' Build claims to look like this:
' {"aud":null,"iss":"o9rw6Gq0RnqlkfaSqtCMOA","exp":1627651762,"iat":1627646363}
Dim claims As New Chilkat.JsonObject
success = claims.UpdateString("iss",apiKey)
success = claims.UpdateNull("aud")

' Set the timestamp of when the JWT was created to now.
Dim curDateTime As Integer = jwt.GenNumericDate(0)
success = claims.AddIntAt(-1,"iat",curDateTime)

' Set the timestamp defining an expiration time (end time) for the token
' to be now + 1 month(3600 * 24 * 30 seconds)
Dim oneMonth As Integer = 3600 * 24 * 30
success = claims.AddIntAt(-1,"exp",curDateTime + oneMonth)

' Produce the smallest possible JWT:
jwt.AutoCompact = True

Dim strJwt As String = jwt.CreateJwt(jose.Emit(),claims.Emit(),apiSecret)

Debug.WriteLine(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


Dim http As New Chilkat.Http

' 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","application/json")
' Adds the "Authorization: Bearer { your_token }" header.
http.AuthToken = strJwt

Dim sbResponseBody As New Chilkat.StringBuilder
success = Await http.QuickGetSbAsync("https://api.zoom.us/v2/users?status=active&page_size=30&page_number=1",sbResponseBody)
If (success = False) Then
    Debug.WriteLine(http.LastErrorText)
    Exit Sub
End If


Dim jResp As New Chilkat.JsonObject
jResp.LoadSb(sbResponseBody)
jResp.EmitCompact = False

Debug.WriteLine("Response Body:")
Debug.WriteLine(jResp.Emit())

Dim respStatusCode As Integer = http.LastStatus
Debug.WriteLine("Response Status Code = " & respStatusCode)
If (respStatusCode >= 400) Then
    Debug.WriteLine("Response Header:")
    Debug.WriteLine(http.LastHeader)
    Debug.WriteLine("Failed.")
    Exit Sub
End If


' 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

Dim id As String
Dim first_name As String
Dim last_name As String
Dim email As String
Dim v_type As Integer
Dim pmi As Integer
Dim timezone As String
Dim verified As Integer
Dim created_at As String
Dim last_login_time As String
Dim language As String
Dim phone_number As String
Dim status As String
Dim role_id As String

Dim page_count As Integer = jResp.IntOf("page_count")
Dim page_number As Integer = jResp.IntOf("page_number")
Dim page_size As Integer = jResp.IntOf("page_size")
Dim total_records As Integer = jResp.IntOf("total_records")
Dim i As Integer = 0
Dim count_i As Integer = jResp.SizeOfArray("users")
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")
    pmi = jResp.IntOf("users[i].pmi")
    timezone = jResp.StringOf("users[i].timezone")
    verified = jResp.IntOf("users[i].verified")
    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
End While