(C#) Frame.io - OAuth2 Access Token

Demonstrates how to get an access token for the Frame.io REST API. This example is for desktop apps only (not web apps).

For more information, see https://docs.frame.io/docs/oauth20-code-flow

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// This example 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 be the port in the localhost callback URL for your app.  
// The callback URL would look like "http://localhost:3017/" if the port number is 3017.
oauth2.ListenPort = 3017;

oauth2.AuthorizationEndpoint = "https://applications.frame.io/oauth2/auth";
oauth2.TokenEndpoint = "https://applications.frame.io/oauth2/token";

// Replace these with actual values.
oauth2.ClientId = "CLIENT_ID";
oauth2.ClientSecret = "CLIENT_SECRET";

// Here's the full list of possible Frame.io scopes:
// presentation.read
// project.create
// presentation.update
// reviewlink.update
// team.updat
// asset.creat
// presentation.creat
// project.delet
// reviewlink.creat
// comment.rea
// account.rea
// team.rea
// reviewlink.rea
// asset.rea
// reviewlink.delet
// presentation.delet
// comment.creat
// asset.delet
// project.updat
// team.creat
// asset.updat
// offlin
// comment.updat
// project.rea
// comment.delet
// auditlog.read

// Request the needed scopes.
oauth2.Scope = "offline asset.create asset.read asset.update asset.delete";

// Frame.io sends the client ID and secret using HTTP basic authentication.
oauth2.UseBasicAuth = true;

// 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
// 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 Microsoft 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);

// Get the full JSON response:
Chilkat.JsonObject json = new Chilkat.JsonObject();
json.Load(oauth2.AccessTokenResponse);
json.EmitCompact = false;

// The JSON response looks like this:

// {
//   "access_token": "kwenK_QQnQipMZGtlGreCwrjUxMBr4OX-XAEVA0Q3Rg.yFqYY_c-Mw_k59X1e9rTYR5m-EWf9ivWc1kqmsxR2v4",
//   "expires_in": 3600,
//   "refresh_token": "ZI7XDR0lWoKAXYxPs8BW7bU2IJg3za0zlimMfvTEhUg.pffnx7xye30Eps6OZEYcdzrINFSM3fM5zi78ln7QQ3o",
//   "scope": "offline asset.create asset.read asset.update asset.delete",
//   "token_type": "bearer"
// }

Debug.WriteLine(json.Emit());

// Save the JSON to a file for future requests.
Chilkat.FileAccess fac = new Chilkat.FileAccess();
fac.WriteEntireTextFile("qa_data/tokens/frame_io.json",json.Emit(),"utf-8",false);