Chilkat Examples

ChilkatHOMEAndroid™Classic ASPCC++C#Mono C#.NET Core C#C# UWP/WinRTDataFlexDelphi ActiveXDelphi DLLVisual FoxProJavaLianjaMFCObjective-CPerlPHP ActiveXPHP ExtensionPowerBuilderPowerShellPureBasicCkPythonChilkat2-PythonRubySQL ServerSwiftTclUnicode CUnicode C++Visual Basic 6.0VB.NETVB.NET UWP/WinRTVBScriptXojo PluginNode.jsExcel

C# UWP/WinRT Examples


ASN.1
Amazon S3
Amazon S3 (new)
Amazon SES
Amazon SNS
Amazon SQS
Azure Cloud Storage
Azure Service Bus
Bounced Email
Box
CSR
CSV
Certificates
Compression
DKIM / DomainKey
DSA
Diffie-Hellman
Digital Signatures
Dropbox
Dynamics CRM
ECC
Email Object
Encryption
FTP
Facebook
Firebase
GeoOp
Google APIs
Google Calendar
Google Cloud Storage
Google Drive
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)

Jira
MHT / HTML Email
MIME
Microsoft Graph
NTLM
OAuth1
OAuth2
OneDrive
OpenSSL
Outlook
PEM
PFX/P12
POP3
PRNG
PayPal
Peoplevox
QuickBooks
REST
REST Misc
RSA Encryption
SCP
SFTP
SMTP
SSH
SSH Key
SSH Tunnel
SharePoint
Shopify
Socket/SSL/TLS
Spider
Stream
Stripe
SugarCRM
Tar Archive
Twitter
VoiceBase
Walmart
WebSocket
XAdES
XML
XML Digital Signatures
XMP
Xero
Zip
curl
eBay

 

 

 

(C# UWP/WinRT) Facebook OAuth2 Access Token

Demonstrates how to get a Facebook OAuth2 access token from a desktop application or script.

Chilkat Universal Windows Platform (UWP) / WinRT Downloads

Chilkat for the Universal Windows Platform (UWP)

//  It requires the Chilkat API to have been previously unlocked.
//  See Global Unlock Sample for sample code.

Chilkat.OAuth2 oauth2 = new Chilkat.OAuth2();
bool success;

//  This should match the Site URL configured for your Facebook APP, such as "http://localhost:3017/"
oauth2.ListenPort = 3017;

oauth2.AuthorizationEndpoint = "https://www.facebook.com/dialog/oauth";
oauth2.TokenEndpoint = "https://graph.facebook.com/oauth/access_token";

//  Replace these with actual values.
oauth2.ClientId = "FACEBOOK-CLIENT-ID";
oauth2.ClientSecret = "FACEBOOK-CLIENT-SECRET";

//  Set the Scope to a comma-separated list of permissions the app wishes to request.
//  See https://developers.facebook.com/docs/facebook-login/permissions/ for a full list of permissions.
oauth2.Scope = "public_profile,user_friends,email,user_posts,user_likes,user_photos,publish_actions";

oauth2.CodeChallenge = true;
oauth2.CodeChallengeMethod = "S256";

//  Begin the OAuth2 three-legged flow.  This returns a URL that should be loaded in a browser.
string url = oauth2.StartAuth();
if (oauth2.LastMethodSuccess != true) {
    Debug.WriteLine(oauth2.LastErrorText);
    return;
}

//  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
//  The Facebook 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.
int numMsWaited = 0;
while ((numMsWaited < 30000) && (oauth2.AuthFlowState < 3)) {
    oauth2.SleepMs(100);
    numMsWaited = numMsWaited + 100;
}

//  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.AuthFlowState < 3) {
    oauth2.Cancel();
    Debug.WriteLine("No response from the browser!");
    return;
}

//  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.AuthFlowState == 5) {
    Debug.WriteLine("OAuth2 failed to complete.");
    Debug.WriteLine(oauth2.FailureInfo);
    return;
}

if (oauth2.AuthFlowState == 4) {
    Debug.WriteLine("OAuth2 authorization was denied.");
    Debug.WriteLine(oauth2.AccessTokenResponse);
    return;
}

if (oauth2.AuthFlowState != 3) {
    Debug.WriteLine("Unexpected AuthFlowState:" + Convert.ToString(oauth2.AuthFlowState));
    return;
}

Debug.WriteLine("OAuth2 authorization granted!");
Debug.WriteLine("Access Token = " + oauth2.AccessToken);

 

© 2000-2016 Chilkat Software, Inc. All Rights Reserved.