Node.js

Firebase JWT User Authentication

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Demonstrates how to authenticate a Firebase REST API call using a JSON service account private key. Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

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

    // First load the Firebase JSON private key into a string.
    var fac = new chilkat.FileAccess();
    var jsonKey = fac.ReadEntireTextFile("qa_data/firebase/fish-8abda-firebase-adminsdk-1ys3o-347d70d581.json","utf-8");
    if (fac.LastMethodSuccess !== true) {
        console.log(fac.LastErrorText);
        return;
    }

    // A JSON private key looks like this:

    // {
    //   "type": "service_account",
    //   "project_id": "fish-8abda",
    //   "private_key_id": "347e70d5810b92516905d2de12d292c16159375b",
    //   "private_key": "-----BEGIN PRIVATE KEY-----\nMIIEvwIBADANBgkqhkiG9 ...  KQRtMB1gBu3KQxgoA==\n-----END PRIVATE KEY-----\n",
    //   "client_email": "firebase-adminsdk-1ys3o@fish-8abda.iam.gserviceaccount.com",
    //   "client_id": "107827947504591332107",
    //   "auth_uri": "https://accounts.google.com/o/oauth2/auth",
    //   "token_uri": "https://accounts.google.com/o/oauth2/token",
    //   "auth_provider_x509_cert_url": "https://www.googleapis.com/oauth2/v1/certs",
    //   "client_x509_cert_url": "https://www.googleapis.com/robot/v1/metadata/x509/firebase-adminsdk-1ys3o%40fish-8abda.iam.gserviceaccount.com"
    // }

    var gAuth = new chilkat.AuthGoogle();
    gAuth.JsonKey = jsonKey;

    // Choose a scope.
    // The scope could be "https://www.googleapis.com/auth/firebase.database"
    // or
    // "https://www.googleapis.com/auth/firebase.database https://www.googleapis.com/auth/userinfo.email"

    gAuth.Scope = "https://www.googleapis.com/auth/firebase.database https://www.googleapis.com/auth/userinfo.email";

    // Request an access token that is valid for this many seconds.
    gAuth.ExpireNumSeconds = 3600;

    // If the application is requesting delegated access:
    // The email address of the user for which the application is requesting delegated access,
    // then set the email address here. (Otherwise leave it empty.)
    gAuth.SubEmailAddress = "";

    // Connect to www.googleapis.com using TLS (TLS 1.2 is the default.)
    // The Chilkat socket object is used so that the connection can be established
    // through proxies or an SSH tunnel if desired.
    var tlsSock = new chilkat.Socket();
    success = tlsSock.Connect("www.googleapis.com",443,true,5000);
    if (success !== true) {
        console.log(tlsSock.LastErrorText);
        return;
    }

    // Send the request to obtain the access token.
    success = gAuth.ObtainAccessToken(tlsSock);
    if (success !== true) {
        console.log(gAuth.LastErrorText);
        return;
    }

    // Examine the access token:
    console.log("Firebase Access Token: " + gAuth.AccessToken);

    // Save the token to a file (or wherever desired).  This token is valid for 1 hour.
    fac.WriteEntireTextFile("qa_data/tokens/firebaseToken.txt",gAuth.AccessToken,"utf-8",false);

}

chilkatExample();