Visual FoxPro Requires Chilkat v10.1.2+
Visual FoxPro
Dynamics CRM OAuth2 Access Token
See more OAuth2 Examples
Demonstrates how to get a Microsoft Dynamics CRM OAuth2 access token from a desktop (installed) application or script.Chilkat Visual FoxPro Downloads
LOCAL lnSuccess
LOCAL loOauth2
LOCAL lcUrl
LOCAL loHttp
LOCAL loSbPreCheck
LOCAL lnNumMsWaited
LOCAL loJson
LOCAL loDtExpire
LOCAL loFac
lnSuccess = 0
* To further clarify, see OAuth 2.0 Authorization Flow
loOauth2 = CreateObject('Chilkat.OAuth2')
* This should be the port in the localhost redirect URL for your app.
* Important: Make sure the redirect URI in your Azure app registration
* is exactly "http://localhost:3017/". Don't forget the ending "/" char.
* The redirect URL would look like "http://localhost:3017/" if the port number is 3017.
loOauth2.ListenPort = 3017
* Get the endpoints from the Azure Portal in the "endpoints" section of App Registrations..
* The DYNAMICS-ENDPOINT-GUID is a Tenant dynamics-endpoint-guid such as 1b54e7ee-d61b-4f12-a621-a6b2805b98c2
loOauth2.AuthorizationEndpoint = "https://login.microsoftonline.com/DYNAMICS-ENDPOINT-GUID/oauth2/authorize"
loOauth2.TokenEndpoint = "https://login.microsoftonline.com/DYNAMICS-ENDPOINT-GUID/oauth2/token"
* Replace these with actual values.
loOauth2.ClientId = "DYNAMICS-CRM-CLIENT-ID"
loOauth2.ClientSecret = "DYNAMICS-CRM-SECRET-KEY"
loOauth2.Resource = "https://mydynamicsdomain.api.crm.dynamics.com"
loOauth2.RedirectAllowHtml = "<html><body><p>Thank you for granting access.</p></bod></html>"
loOauth2.RedirectDenyHtml = "<html><body><p>Maybe next time...</p></bod></html>"
* Begin the OAuth2 Authorization code flow. This returns a URL that should be loaded in a browser.
lcUrl = loOauth2.StartAuth()
IF (loOauth2.LastMethodSuccess <> 1) THEN
? loOauth2.LastErrorText
RELEASE loOauth2
CANCEL
ENDIF
* We can pre-check the URL by sending a GET to catch any up-front errors.
* If we receive JSON with an error in response, then we don't proceed any farther.
* If we receive an HTML response, and the response status = 200, then all should be OK.
* We can proceed by displaying an interactive browser loaded with the url.
loHttp = CreateObject('Chilkat.Http')
loSbPreCheck = CreateObject('Chilkat.StringBuilder')
lnSuccess = loHttp.QuickGetSb(lcUrl,loSbPreCheck)
IF ((loHttp.LastStatus <> 200) OR (loSbPreCheck.StartsWith("{",1) <> 1)) THEN
? "JSON Error Response:"
? loSbPreCheck.GetAsString()
RELEASE loOauth2
RELEASE loHttp
RELEASE loSbPreCheck
CANCEL
ENDIF
* If the HTTP request itself failed, then examine the error.
IF (lnSuccess = 0) THEN
? loHttp.LastErrorText
RELEASE loOauth2
RELEASE loHttp
RELEASE loSbPreCheck
CANCEL
ENDIF
* OK.. the pre-flight check seems OK, go ahead with getting the interactive user authorization..
* Launch the default browser on the system and navigate to the url.
* The LaunchBrowser method was added in Chilkat v10.1.2.
lnSuccess = loOauth2.LaunchBrowser(lcUrl)
IF (lnSuccess = 0) THEN
? loOauth2.LastErrorText
RELEASE loOauth2
RELEASE loHttp
RELEASE loSbPreCheck
CANCEL
ENDIF
* Wait for the user to approve or deny authorization in the browser.
lnNumMsWaited = 0
DO WHILE (lnNumMsWaited < 90000) AND (loOauth2.AuthFlowState < 3)
loOauth2.SleepMs(100)
lnNumMsWaited = lnNumMsWaited + 100
ENDDO
* If the browser does not respond within the specified time, AuthFlowState will be:
*
* 1: Waiting for Redirect – The OAuth2 background thread is waiting for the browser's redirect request.
* 2: Waiting for Final Response – The thread is awaiting the final access token response.
* In either case, cancel the background task initiated by StartAuth.
IF (loOauth2.AuthFlowState < 3) THEN
loOauth2.Cancel()
? "No response from the browser!"
RELEASE loOauth2
RELEASE loHttp
RELEASE loSbPreCheck
CANCEL
ENDIF
* Check AuthFlowState to determine if authorization was granted, denied, or failed:
*
* 3: Success – OAuth2 flow completed, the background thread exited, and the successful response is in AccessTokenResponse.
* 4: Access Denied – OAuth2 flow completed, the background thread exited, and the error response is in AccessTokenResponse.
* 5: Failure – OAuth2 flow failed before completion, the background thread exited, and error details are in FailureInfo.
IF (loOauth2.AuthFlowState = 5) THEN
? "OAuth2 failed to complete."
? loOauth2.FailureInfo
RELEASE loOauth2
RELEASE loHttp
RELEASE loSbPreCheck
CANCEL
ENDIF
IF (loOauth2.AuthFlowState = 4) THEN
? "OAuth2 authorization was denied."
? loOauth2.AccessTokenResponse
RELEASE loOauth2
RELEASE loHttp
RELEASE loSbPreCheck
CANCEL
ENDIF
IF (loOauth2.AuthFlowState <> 3) THEN
? "Unexpected AuthFlowState:" + STR(loOauth2.AuthFlowState)
RELEASE loOauth2
RELEASE loHttp
RELEASE loSbPreCheck
CANCEL
ENDIF
? "OAuth2 authorization granted!"
? "Access Token = " + loOauth2.AccessToken
* Get the full JSON response:
loJson = CreateObject('Chilkat.JsonObject')
loJson.Load(loOauth2.AccessTokenResponse)
loJson.EmitCompact = 0
* The JSON response looks 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": "..."
* }
* 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 = CreateObject('Chilkat.CkDateTime')
loDtExpire.SetFromCurrentSystemTime()
loDtExpire.AddSeconds(loJson.IntOf("expires_in"))
loJson.AppendString("expires_on",loDtExpire.GetAsUnixTimeStr(0))
ENDIF
? loJson.Emit()
* Save the JSON to a file for future requests.
loFac = CreateObject('Chilkat.FileAccess')
loFac.WriteEntireTextFile("qa_data/tokens/dynamicsCrm.json",loJson.Emit(),"utf-8",0)
RELEASE loOauth2
RELEASE loHttp
RELEASE loSbPreCheck
RELEASE loJson
RELEASE loDtExpire
RELEASE loFac