(JavaScript) GetHarvest API V2 OAuth Token

Demonstrates how to get an OAuth2 access token for the GetHarvest v2 API (from a desktop application).

For more information, see https://help.getharvest.com/api-v2/authentication-api/authentication/authentication/

Note

This example is intended for running within a Chilkat.Js embedded JavaScript engine. All Chilkat JavaScript examples require Chilkat v11.4.0 or greater.

var success = false;

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

var oauth2 = new CkOAuth2();

// 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://id.getharvest.com/oauth2/authorize";
oauth2.TokenEndpoint = "https://id.getharvest.com/api/v2/oauth2/token";

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

oauth2.CodeChallenge = false;

oauth2.Scope = "all";

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

// Launch the system's default browser navigated to the URL.
success = oauth2.LaunchBrowser(url);
if (success == false) {
    console.log(oauth2.LastErrorText);
    return;
}

// Now wait for the authorization.
// We'll wait for a max of 60 seconds.
var numMsWaited = 0;
while ((numMsWaited < 60000) && (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;
}

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

// Get the full JSON response:
var json = new CkJsonObject();
json.Load(oauth2.AccessTokenResponse);
json.EmitCompact = false;
console.log(json.Emit());

// The JSON response looks like this:

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