Node.js

Adobe Sign OAuth2 Access Token

See more OAuth2 Examples

Demonstrates how to get an Adobe Sign OAuth2 access token from a desktop application or script. Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

    //  To further clarify, see OAuth 2.0 Authorization Flow

    var oauth2 = new chilkat.OAuth2();

    //  The Adobe Sign OAuth2 requires an "https" callback URL.  This means the "http://localhost:<portNumber>/" is not possible.
    //  For a desktop app, you must provide a script on your web server to redirect to "http://localhost:<portNumber>/"

    //  See Using Your Web Server as an Intermediary for OAuth2 Redirect to localhost

    oauth2.AppCallbackUrl = "https://yourwebserver.com/OAuth2.php";
    oauth2.ListenPort = 3017;

    oauth2.AuthorizationEndpoint = "https://secure.na2.echosign.com/public/oauth";
    oauth2.TokenEndpoint = "https://api.na2.echosign.com/oauth/token";

    //  Replace these with actual values.
    oauth2.ClientId = "MY_CLIENT_ID";

    //  This is for Require Proof Key for Code Exchange (PKCE)
    //  See OAuth2 PKCE Explained
    oauth2.CodeChallenge = true;
    oauth2.CodeChallengeMethod = "S256";

    //  Indicate the desired access by listing scopes.
    oauth2.Scope = "user_read agreement_read workflow_read";

    //  Begin the OAuth2 Authorization code flow.  This returns a URL that should be loaded in a browser.
    var url = oauth2.StartAuth();
    if (oauth2.LastMethodSuccess !== true) {
        console.log(oauth2.LastErrorText);
        return;
    }

    console.log("url = " + url);

    //  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) {
        console.log(oauth2.LastErrorText);
        return;
    }

    //  Wait for the user to approve or deny authorization in the browser.
    var numMsWaited = 0;
    while ((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();
        console.log("No response from the browser!");
        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) {
        console.log("OAuth2 failed to complete.");
        console.log(oauth2.FailureInfo);
        return;
    }

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

    if (oauth2.AuthFlowState !== 3) {
        console.log("Unexpected AuthFlowState:" + oauth2.AuthFlowState);
        return;
    }

    //  Save the full JSON access token response to a file.
    var sbJson = new chilkat.StringBuilder();
    sbJson.Append(oauth2.AccessTokenResponse);
    sbJson.WriteFile("qa_data/tokens/adobe-sign-access-token.json","utf-8",false);

    //  The full JSON received looks like this:
    //  {
    //    "access_token": "3AAABL ... YCpUu",
    //    "refresh_token": "3AAABL ... tpDs0*",
    //    "token_type": "Bearer",
    //    "expires_in": 3600
    //  }

    console.log("OAuth2 authorization granted!");
    console.log("Access Token = " + oauth2.AccessToken);

}

chilkatExample();