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delphiAx / Zoho CRM REST APIs / Refresh Access Tokens

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var
http: TChilkatHttp;
success: Integer;
req: TChilkatHttpRequest;
jsonFormData1: TChilkatJsonObject;
jsonFormData2: TChilkatJsonObject;
jsonFormData3: TChilkatJsonObject;
resp: IChilkatHttpResponse;

begin
// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

http := TChilkatHttp.Create(Self);

req := TChilkatHttpRequest.Create(Self);
req.HttpVerb := 'POST';
req.Path := '/oauth/v2/token';
req.ContentType := 'multipart/form-data';

jsonFormData1 := TChilkatJsonObject.Create(Self);
req.AddStringForUpload2('client_id','',jsonFormData1.ControlInterface,'utf-8','application/json');

jsonFormData2 := TChilkatJsonObject.Create(Self);
req.AddStringForUpload2('client_secret','',jsonFormData2.ControlInterface,'utf-8','application/json');

jsonFormData3 := TChilkatJsonObject.Create(Self);
req.AddStringForUpload2('refresh_token','',jsonFormData3.ControlInterface,'utf-8','application/json');

req.AddParam('grant_type','{{client-id}}{{client-secret}}{{refresh-token}}refresh_token');

resp := http.SynchronousRequest('domain.com',443,1,req.ControlInterface);
if (http.LastMethodSuccess = 0) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    Exit;
  end;

Memo1.Lines.Add(IntToStr(resp.StatusCode));
Memo1.Lines.Add(resp.BodyStr);

Curl Command

curl -X POST
	--form 'client_id={{client-id}}'
	--form 'client_secret={{client-id}}{{client-secret}}'
	--form 'refresh_token={{client-id}}{{client-secret}}{{refresh-token}}'
	--form 'grant_type={{client-id}}{{client-secret}}{{refresh-token}}refresh_token'
https://domain.com/oauth/v2/token

Postman Collection Item JSON

{
  "name": "Refresh Access Tokens",
  "event": [
    {
      "listen": "test",
      "script": {
        "exec": [
          "if (responseCode.code === 200)",
          "{",
          "    var jsonData = JSON.parse(responseBody);",
          "",
          "    pm.environment.set(\"access-token\", jsonData.access_token);",
          "    pm.environment.set(\"expiry-time\", Date.now() + parseInt(jsonData.expires_in));",
          "}"
        ],
        "type": "text/javascript"
      }
    }
  ],
  "request": {
    "auth": {
      "type": "noauth"
    },
    "method": "POST",
    "header": [
    ],
    "body": {
      "mode": "formdata",
      "formdata": [
        {
          "key": "client_id",
          "value": "{{client-id}}",
          "type": "text"
        },
        {
          "key": "client_secret",
          "value": "{{client-secret}}",
          "type": "text"
        },
        {
          "key": "refresh_token",
          "value": "{{refresh-token}}",
          "type": "text"
        },
        {
          "key": "grant_type",
          "value": "refresh_token",
          "type": "text"
        }
      ]
    },
    "url": {
      "raw": "{{accounts-url}}/oauth/v2/token",
      "host": [
        "{{accounts-url}}"
      ],
      "path": [
        "oauth",
        "v2",
        "token"
      ]
    },
    "description": "### Step 4: Refresh Access Tokens\n\nAs obvious as it is, refresh tokens are used to generate new access tokens when the current ones are past the expiry time."
  },
  "response": [
  ]
}