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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 Go Downloads
success := false
// To further clarify, see OAuth 2.0 Authorization Flow
oauth2 := chilkat.NewOAuth2()
// 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.
oauth2.SetListenPort(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
oauth2.SetAuthorizationEndpoint("https://login.microsoftonline.com/DYNAMICS-ENDPOINT-GUID/oauth2/authorize")
oauth2.SetTokenEndpoint("https://login.microsoftonline.com/DYNAMICS-ENDPOINT-GUID/oauth2/token")
// Replace these with actual values.
oauth2.SetClientId("DYNAMICS-CRM-CLIENT-ID")
oauth2.SetClientSecret("DYNAMICS-CRM-SECRET-KEY")
oauth2.SetResource("https://mydynamicsdomain.api.crm.dynamics.com")
oauth2.SetRedirectAllowHtml("<html><body><p>Thank you for granting access.</p></bod></html>")
oauth2.SetRedirectDenyHtml("<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.
url := oauth2.StartAuth()
if oauth2.LastMethodSuccess() != true {
fmt.Println(oauth2.LastErrorText())
oauth2.DisposeOAuth2()
return
}
// 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.
http := chilkat.NewHttp()
sbPreCheck := chilkat.NewStringBuilder()
success = http.QuickGetSb(*url,sbPreCheck)
if (http.LastStatus() != 200) || (sbPreCheck.StartsWith("{",true) != true) {
fmt.Println("JSON Error Response:")
fmt.Println(*sbPreCheck.GetAsString())
oauth2.DisposeOAuth2()
http.DisposeHttp()
sbPreCheck.DisposeStringBuilder()
return
}
// If the HTTP request itself failed, then examine the error.
if success == false {
fmt.Println(http.LastErrorText())
oauth2.DisposeOAuth2()
http.DisposeHttp()
sbPreCheck.DisposeStringBuilder()
return
}
// 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.
success = oauth2.LaunchBrowser(*url)
if success == false {
fmt.Println(oauth2.LastErrorText())
oauth2.DisposeOAuth2()
http.DisposeHttp()
sbPreCheck.DisposeStringBuilder()
return
}
// Wait for the user to approve or deny authorization in the browser.
numMsWaited := 0
for (numMsWaited < 90000) && (oauth2.AuthFlowState() < 3) {
oauth2.SleepMs(100)
numMsWaited = numMsWaited + 100
}
// 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 oauth2.AuthFlowState() < 3 {
oauth2.Cancel()
fmt.Println("No response from the browser!")
oauth2.DisposeOAuth2()
http.DisposeHttp()
sbPreCheck.DisposeStringBuilder()
return
}
// 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 oauth2.AuthFlowState() == 5 {
fmt.Println("OAuth2 failed to complete.")
fmt.Println(oauth2.FailureInfo())
oauth2.DisposeOAuth2()
http.DisposeHttp()
sbPreCheck.DisposeStringBuilder()
return
}
if oauth2.AuthFlowState() == 4 {
fmt.Println("OAuth2 authorization was denied.")
fmt.Println(oauth2.AccessTokenResponse())
oauth2.DisposeOAuth2()
http.DisposeHttp()
sbPreCheck.DisposeStringBuilder()
return
}
if oauth2.AuthFlowState() != 3 {
fmt.Println("Unexpected AuthFlowState:", oauth2.AuthFlowState())
oauth2.DisposeOAuth2()
http.DisposeHttp()
sbPreCheck.DisposeStringBuilder()
return
}
fmt.Println("OAuth2 authorization granted!")
fmt.Println("Access Token = ", oauth2.AccessToken())
// Get the full JSON response:
json := chilkat.NewJsonObject()
json.Load(oauth2.AccessTokenResponse())
json.SetEmitCompact(false)
// 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 json.HasMember("expires_on") != true {
dtExpire := chilkat.NewCkDateTime()
dtExpire.SetFromCurrentSystemTime()
dtExpire.AddSeconds(*json.IntOf("expires_in"))
json.AppendString("expires_on",*dtExpire.GetAsUnixTimeStr(false))
}
fmt.Println(*json.Emit())
// Save the JSON to a file for future requests.
fac := chilkat.NewFileAccess()
fac.WriteEntireTextFile("qa_data/tokens/dynamicsCrm.json",*json.Emit(),"utf-8",false)
oauth2.DisposeOAuth2()
http.DisposeHttp()
sbPreCheck.DisposeStringBuilder()
json.DisposeJsonObject()
dtExpire.DisposeCkDateTime()
fac.DisposeFileAccess()