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Node.js Examples


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(Node.js) Google OAuth2 Access Token

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

Install Chilkat for Node.js using npm

Node.js 6.*.*, ARMv7l Linux: npm install chilkat_node6_arm

Node.js 6.*.*, 32-bit Linux: npm install chilkat_node6_linux32

Node.js 6.*.*, 64-bit Linux: npm install chilkat_node6_linux64

Node.js 6.*.*, MAC OS X: npm install chilkat_node6_macosx

Node.js 6.*.*, 64-bit Windows: npm install chilkat_node6_win32

Node.js 5.*.*, ARMv7l Linux: npm install chilkat_node5_arm

Node.js 5.*.*, 32-bit Linux: npm install chilkat_node5_linux32

Node.js 5.*.*, 64-bit Linux: npm install chilkat_node5_linux64

Node.js 5.*.*, MAC OS X: npm install chilkat_node5_macosx

Node.js 5.*.*, 64-bit Windows: npm install chilkat_node5_win32

Node.js 4.*.*, ARMv7l Linux: npm install chilkat_node4_arm

Node.js 4.*.*, 32-bit Linux: npm install chilkat_node4_linux32

Node.js 4.*.*, 64-bit Linux: npm install chilkat_node4_linux64

Node.js 4.*.*, MAC OS X: npm install chilkat_node4_macosx

Node.js 4.*.*, 64-bit Windows: npm install chilkat_node4_win32

var os = require('os');
if (os.platform() == 'win32') {  
    var chilkat = require('chilkat_node6_win32'); 
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('chilkat_node6_arm');
    } else if (os.arch() == 'x86') {
        var chilkat = require('chilkat_node6_linux32');
    } else {
        var chilkat = require('chilkat_node6_linux64');
    }
} else if (os.platform() == 'darwin') {
    var chilkat = require('chilkat_node6_macosx');
}

function chilkatExample() {

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

    var oauth2 = new chilkat.OAuth2();
    var success;

    //  For Google OAuth2, set the listen port equal to the port used
    //  in the Authorized Redirect URL for the Client ID.
    //  For example, in this case the Authorized Redirect URL would be http://localhost:55568/
    //  Your app should choose a port not likely not used by any other application.
    oauth2.ListenPort = 55568;

    oauth2.AuthorizationEndpoint = "https://accounts.google.com/o/oauth2/v2/auth";
    oauth2.TokenEndpoint = "https://www.googleapis.com/oauth2/v4/token";

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

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

    //  This is the scope for Google Drive.
    //  See https://developers.google.com/identity/protocols/googlescopes
    oauth2.Scope = "https://www.googleapis.com/auth/drive";

    //  Begin the OAuth2 three-legged 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;
    }

    //  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 Google 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.
    var 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();
        console.log("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) {
        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/googleDrive.json","utf-8",false);

    //  The saved JSON response looks like this:

    //  	{
    //  	 "access_token": "ya39.Ci-XA_C5bGgRDC3UaD-h0_NeL-DVIQnI2gHtBBBHkZzrwlARkwX6R3O0PCDEzRlfaQ",
    //  	 "token_type": "Bearer",
    //  	 "expires_in": 3600,
    //  	 "refresh_token": "1/r_2c_7jddspcdfesrrfKqfXtqo08D6Q-gUU0DsdfVMsx0c"
    //  	}
    // 
    console.log("OAuth2 authorization granted!");
    console.log("Access Token = " + oauth2.AccessToken);

}

chilkatExample();

 

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