Chilkat Examples

ChilkatHOMEAndroid™Classic ASPCC++C#Mono C#.NET Core C#C# UWP/WinRTDataFlexDelphi ActiveXDelphi DLLVisual FoxProJavaLianjaMFCObjective-CPerlPHP ActiveXPHP ExtensionPowerBuilderPowerShellPureBasicCkPythonChilkat2-PythonRubySQL ServerSwift 2Swift 3/4TclUnicode CUnicode C++Visual Basic 6.0VB.NETVB.NET UWP/WinRTVBScriptXojo PluginNode.jsExcelGo

Visual FoxPro Examples

Web API Categories

ASN.1
Amazon Glacier
Amazon S3
Amazon S3 (new)
Amazon SES
Amazon SNS
Amazon SQS
Async
Azure Cloud Storage
Azure Service Bus
Base64
Bounced Email
Box
CAdES
CSR
CSV
Certificates
Compression
DKIM / DomainKey
DSA
Diffie-Hellman
Digital Signatures
Dropbox
Dynamics CRM
ECC
Email Object
Encryption
FTP
FileAccess
Firebase
GMail REST API
Geolocation
Google APIs
Google Calendar
Google Cloud Storage
Google Drive
Google Photos
Google Sheets
Google Tasks
Gzip
HTML-to-XML/Text

HTTP
HTTP Misc
IMAP
JSON
JSON Web Encryption (JWE)
JSON Web Signatures (JWS)
JSON Web Token (JWT)
Java KeyStore (JKS)
MHT / HTML Email
MIME
Microsoft Graph
NTLM
OAuth1
OAuth2
OneDrive
OpenSSL
Outlook
PEM
PFX/P12
POP3
PRNG
REST
REST Misc
RSA Encryption
SCP
SFTP
SMTP
SSH
SSH Key
SSH Tunnel
SharePoint
Socket/SSL/TLS
Spider
Stream
Tar Archive
Upload
WebSocket
XAdES
XML
XML Digital Signatures
XMP
Zip
curl

 

 

 

(Visual FoxPro) Refresh a Dynamics CRM OAuth2 Access Token

Demonstrates how to refresh an expiring Dynamics CRM access token using the refresh token. endpoint.

(If a REST API call fails with a 401 unauthorized error, an application can auto-recover by refreshing the access token, and then re-send the request using the new token.)

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

LOCAL loJson
LOCAL lnSuccess
LOCAL loDtExpire
LOCAL loReq
LOCAL loHttp
LOCAL loResp
LOCAL loFac

*  This example requires the Chilkat API to have been previously unlocked.
*  See Global Unlock Sample for sample code.

*  We previously obtained an access token and saved the JSON to a file using this example:
*  Get Dynamics CRM OAuth2 Access Token

*  This example will examine the JSON and expiration date, and if near expiration will
*  refresh the access token.

loJson = CreateObject('Chilkat_9_5_0.JsonObject')
lnSuccess = loJson.LoadFile("qa_data/tokens/dynamicsCrm.json")
IF (lnSuccess <> 1) THEN
    RELEASE loJson
    CANCEL
ENDIF

*  The contents of the JSON look like this:
*  {
*    "token_type": "Bearer",
*    "scope": "user_impersonation",
*    "expires_in": "3599",
*    "ext_expires_in": "0",
*    "expires_on": "1524783438",
*    "not_before": "1524779538",
*    "resource": "https://mydomain.api.crm.dynamics.com",
*    "access_token": "...",
*    "refresh_token": "...",
*    "id_token": "..."
*  }

*  The "expires_on" value is a Unix time.
loDtExpire = CreateObject('Chilkat_9_5_0.CkDateTime')
loDtExpire.SetFromUnixTime(0,loJson.IntOf("expires_on"))

*  If this date/time expires within 10 minutes of the current system time, refresh the token.

*  OK, we need to refresh the access token by sending a POST...
* 

loReq = CreateObject('Chilkat_9_5_0.HttpRequest')
loReq.AddParam("grant_type","refresh_token")
loReq.AddParam("redirect_uri","http://localhost:3017/")
loReq.AddParam("client_id","DYNAMICS-CRM-CLIENT-ID")
loReq.AddParam("client_secret","DYNAMICS-CRM-SECRET-KEY")
loReq.AddParam("refresh_token",loJson.StringOf("refresh_token"))
loReq.AddParam("resource","https://mydynamicsdomain.api.crm.dynamics.com")

loHttp = CreateObject('Chilkat_9_5_0.Http')

loResp = loHttp.PostUrlEncoded("https://login.microsoftonline.com/DYNAMICS-ENDPOINT-GUID/oauth2/token",loReq)
IF (loHttp.LastMethodSuccess <> 1) THEN
    ? loHttp.LastErrorText
    RELEASE loJson
    RELEASE loDtExpire
    RELEASE loReq
    RELEASE loHttp
    CANCEL
ENDIF

*  Load the JSON response.
loJson.Load(loResp.BodyStr)
loJson.EmitCompact = 0

*  Show the JSON response.
? loJson.Emit()

? "Response status code: " + STR(loResp.StatusCode)

*  If the response status code is not 200, then it's an error.
IF (loResp.StatusCode <> 200) THEN
    RELEASE loJson
    RELEASE loDtExpire
    RELEASE loReq
    RELEASE loHttp
    CANCEL
ENDIF

RELEASE loResp

*  If an "expires_on" member does not exist, then add the JSON member by
*  getting the current system date/time and adding the "expires_in" seconds.
*  This way we'll know when the token expires.
IF (loJson.HasMember("expires_on") <> 1) THEN
    loDtExpire.SetFromCurrentSystemTime()
    loDtExpire.AddSeconds(loJson.IntOf("expires_in"))
    loJson.AppendString("expires_on",loDtExpire.GetAsUnixTimeStr(0))
ENDIF

*  Save the refreshed access token JSON to a file for future requests.
loFac = CreateObject('Chilkat_9_5_0.FileAccess')
loFac.WriteEntireTextFile("qa_data/tokens/dynamicsCrm.json",loJson.Emit(),"utf-8",0)

RELEASE loJson
RELEASE loDtExpire
RELEASE loReq
RELEASE loHttp
RELEASE loFac


 

© 2000-2019 Chilkat Software, Inc. All Rights Reserved.