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(Ruby) Dynamics CRM OAuth2 Access Token

Demonstrates how to get a Microsoft Dynamics CRM OAuth2 access token from a desktop (installed) application or script.

Chilkat Ruby Downloads

install from rubygems.org

gem install chilkat

or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require 'chilkat'

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

oauth2 = Chilkat::CkOAuth2.new()

# 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.put_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
oauth2.put_AuthorizationEndpoint("https://login.microsoftonline.com/DYNAMICS-ENDPOINT-GUID/oauth2/authorize")
oauth2.put_TokenEndpoint("https://login.microsoftonline.com/DYNAMICS-ENDPOINT-GUID/oauth2/token")

# Replace these with actual values.
oauth2.put_ClientId("DYNAMICS-CRM-CLIENT-ID")
oauth2.put_ClientSecret("DYNAMICS-CRM-SECRET-KEY")

oauth2.put_Resource("https://mydynamicsdomain.api.crm.dynamics.com")

oauth2.put_RedirectAllowHtml("<html><body><p>Thank you for granting access.</p></bod></html>")
oauth2.put_RedirectDenyHtml("<html><body><p>Maybe next time...</p></bod></html>")

# Begin the OAuth2 three-legged flow.  This returns a URL that should be loaded in a browser.
url = oauth2.startAuth()
if (oauth2.get_LastMethodSuccess() != true)
    print oauth2.lastErrorText() + "\n";
    exit
end

# 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::CkHttp.new()
sbPreCheck = Chilkat::CkStringBuilder.new()
success = http.QuickGetSb(url,sbPreCheck)
if ((http.get_LastStatus() != 200) or (sbPreCheck.StartsWith("{",true) != true))
    print "JSON Error Response:" + "\n";
    print sbPreCheck.getAsString() + "\n";
    exit
end

# If the HTTP request itself failed, then examine the error.
if (success == false)
    print http.lastErrorText() + "\n";
    exit
end

# OK.. the pre-flight check seems OK, go ahead with getting the interactive user authorization..

# At this point, your application should load the URL in a browser.
# For example, 
# in C#:  System.Diagnostics.Process.Start(url);
# in Java: Desktop.getDesktop().browse(new URI(url));
# in VBScript: Set wsh=WScript.CreateObject("WScript.Shell")
#              wsh.Run url
# in Xojo: ShowURL(url)  (see http://docs.xojo.com/index.php/ShowURL)
# in Dataflex: Runprogram Background "c:\Program Files\Internet Explorer\iexplore.exe" sUrl        
# The GitHub account owner would interactively accept or deny the authorization request.

# Add the code to load the url in a web browser here...
# Add the code to load the url in a web browser here...
# Add the code to load the url in a web browser here...

# Now wait for the authorization.
# We'll wait for a max of 30 seconds.
numMsWaited = 0
while (numMsWaited < 30000) and (oauth2.get_AuthFlowState() < 3)
    oauth2.SleepMs(100)
    numMsWaited = numMsWaited + 100
end

# If there was no response from the browser within 30 seconds, then 
# the AuthFlowState will be equal to 1 or 2.
# 1: Waiting for Redirect. The OAuth2 background thread is waiting to receive the redirect HTTP request from the browser.
# 2: Waiting for Final Response. The OAuth2 background thread is waiting for the final access token response.
# In that case, cancel the background task started in the call to StartAuth.
if (oauth2.get_AuthFlowState() < 3)
    oauth2.Cancel()
    print "No response from the browser!" + "\n";
    exit
end

# Check the AuthFlowState to see if authorization was granted, denied, or if some error occurred
# The possible AuthFlowState values are:
# 3: Completed with Success. The OAuth2 flow has completed, the background thread exited, and the successful JSON response is available in AccessTokenResponse property.
# 4: Completed with Access Denied. The OAuth2 flow has completed, the background thread exited, and the error JSON is available in AccessTokenResponse property.
# 5: Failed Prior to Completion. The OAuth2 flow failed to complete, the background thread exited, and the error information is available in the FailureInfo property.
if (oauth2.get_AuthFlowState() == 5)
    print "OAuth2 failed to complete." + "\n";
    print oauth2.failureInfo() + "\n";
    exit
end

if (oauth2.get_AuthFlowState() == 4)
    print "OAuth2 authorization was denied." + "\n";
    print oauth2.accessTokenResponse() + "\n";
    exit
end

if (oauth2.get_AuthFlowState() != 3)
    print "Unexpected AuthFlowState:" + oauth2.get_AuthFlowState().to_s() + "\n";
    exit
end

print "OAuth2 authorization granted!" + "\n";
print "Access Token = " + oauth2.accessToken() + "\n";

# Get the full JSON response:
json = Chilkat::CkJsonObject.new()
json.Load(oauth2.accessTokenResponse())
json.put_EmitCompact(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::CkDateTime.new()
    dtExpire.SetFromCurrentSystemTime()
    dtExpire.AddSeconds(json.IntOf("expires_in"))
    json.AppendString("expires_on",dtExpire.getAsUnixTimeStr(false))
end

print json.emit() + "\n";

# Save the JSON to a file for future requests.
fac = Chilkat::CkFileAccess.new()
fac.WriteEntireTextFile("qa_data/tokens/dynamicsCrm.json",json.emit(),"utf-8",false)

 

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