(Delphi DLL) Zoom API - Create JWT to Authenticate API Requests

See more Zoom Examples

Creates a JWT for the Zoom API.

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

Chilkat for Delphi Downloads Chilkat non-ActiveX DLL for Delphi Chilkat ActiveX DLL for Delphi * The examples here use the non-ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Http, StringBuilder, Jwt, JsonObject;

...

procedure TForm1.Button1Click(Sender: TObject);
var
apiKey: PWideChar;
apiSecret: PWideChar;
jwt: HCkJwt;
jose: HCkJsonObject;
success: Boolean;
claims: HCkJsonObject;
curDateTime: Integer;
oneMonth: Integer;
strJwt: PWideChar;
http: HCkHttp;
sbResponseBody: HCkStringBuilder;
jResp: HCkJsonObject;
respStatusCode: Integer;
id: PWideChar;
first_name: PWideChar;
last_name: PWideChar;
email: PWideChar;
v_type: Integer;
pmi: Integer;
timezone: PWideChar;
verified: Integer;
created_at: PWideChar;
last_login_time: PWideChar;
language: PWideChar;
phone_number: PWideChar;
status: PWideChar;
role_id: PWideChar;
page_count: Integer;
page_number: Integer;
page_size: Integer;
total_records: Integer;
i: Integer;
count_i: Integer;

begin
// 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...
apiKey := 'o9rw6Gq0RnqlkfaSqtCMOA';
apiSecret := 'UslmE23Kjh7at9z3If1xAHEyLmPDNxvxQrjR';

// Create a JWT to authenticate Zoom API requests.
jwt := CkJwt_Create();

jose := CkJsonObject_Create();
success := CkJsonObject_UpdateString(jose,'alg','HS256');
success := CkJsonObject_UpdateString(jose,'typ','JWT');

// Build claims to look like this:
// {"aud":null,"iss":"o9rw6Gq0RnqlkfaSqtCMOA","exp":1627651762,"iat":1627646363}
claims := CkJsonObject_Create();
success := CkJsonObject_UpdateString(claims,'iss',apiKey);
success := CkJsonObject_UpdateNull(claims,'aud');

// Set the timestamp of when the JWT was created to now.
curDateTime := CkJwt_GenNumericDate(jwt,0);
success := CkJsonObject_AddIntAt(claims,-1,'iat',curDateTime);

// Set the timestamp defining an expiration time (end time) for the token
// to be now + 1 month(3600 * 24 * 30 seconds)
oneMonth := 3600 * 24 * 30;
success := CkJsonObject_AddIntAt(claims,-1,'exp',curDateTime + oneMonth);

// Produce the smallest possible JWT:
CkJwt_putAutoCompact(jwt,True);

strJwt := CkJwt__createJwt(jwt,CkJsonObject__emit(jose),CkJsonObject__emit(claims),apiSecret);

Memo1.Lines.Add(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

http := CkHttp_Create();

// 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

CkHttp_SetRequestHeader(http,'content-type','application/json');
// Adds the "Authorization: Bearer { your_token }" header.
CkHttp_putAuthToken(http,strJwt);

sbResponseBody := CkStringBuilder_Create();
success := CkHttp_QuickGetSb(http,'https://api.zoom.us/v2/users?status=active&page_size=30&page_number=1',sbResponseBody);
if (success = False) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

jResp := CkJsonObject_Create();
CkJsonObject_LoadSb(jResp,sbResponseBody);
CkJsonObject_putEmitCompact(jResp,False);

Memo1.Lines.Add('Response Body:');
Memo1.Lines.Add(CkJsonObject__emit(jResp));

respStatusCode := CkHttp_getLastStatus(http);
Memo1.Lines.Add('Response Status Code = ' + IntToStr(respStatusCode));
if (respStatusCode >= 400) then
  begin
    Memo1.Lines.Add('Response Header:');
    Memo1.Lines.Add(CkHttp__lastHeader(http));
    Memo1.Lines.Add('Failed.');
    Exit;
  end;

// 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

page_count := CkJsonObject_IntOf(jResp,'page_count');
page_number := CkJsonObject_IntOf(jResp,'page_number');
page_size := CkJsonObject_IntOf(jResp,'page_size');
total_records := CkJsonObject_IntOf(jResp,'total_records');
i := 0;
count_i := CkJsonObject_SizeOfArray(jResp,'users');
while i < count_i do
  begin
    CkJsonObject_putI(jResp,i);
    id := CkJsonObject__stringOf(jResp,'users[i].id');
    first_name := CkJsonObject__stringOf(jResp,'users[i].first_name');
    last_name := CkJsonObject__stringOf(jResp,'users[i].last_name');
    email := CkJsonObject__stringOf(jResp,'users[i].email');
    v_type := CkJsonObject_IntOf(jResp,'users[i].type');
    pmi := CkJsonObject_IntOf(jResp,'users[i].pmi');
    timezone := CkJsonObject__stringOf(jResp,'users[i].timezone');
    verified := CkJsonObject_IntOf(jResp,'users[i].verified');
    created_at := CkJsonObject__stringOf(jResp,'users[i].created_at');
    last_login_time := CkJsonObject__stringOf(jResp,'users[i].last_login_time');
    language := CkJsonObject__stringOf(jResp,'users[i].language');
    phone_number := CkJsonObject__stringOf(jResp,'users[i].phone_number');
    status := CkJsonObject__stringOf(jResp,'users[i].status');
    role_id := CkJsonObject__stringOf(jResp,'users[i].role_id');
    i := i + 1;
  end;

CkJwt_Dispose(jwt);
CkJsonObject_Dispose(jose);
CkJsonObject_Dispose(claims);
CkHttp_Dispose(http);
CkStringBuilder_Dispose(sbResponseBody);
CkJsonObject_Dispose(jResp);

end;