Set the application type to WebĪpplication. Click Create credentials > OAuth client ID.Open the Credentials page in the API Console.Your applications can then use the credentials to access APIs that you have enabled for that project. The following steps explain how to create credentials for your project. Click on each API and enable it for your project.Īny application that uses OAuth 2.0 to access Google APIs must have authorization credentials that identify the application to Google's OAuth 2.0 server. Use the Library page to find each API that your application will use.Create a project if you do not have one already. Select the project associated with your application.Open the Library page in the API Console.To enable the appropriate APIs for your project: Prerequisites Enable APIs for your projectĪny application that calls Google APIs needs to enable those APIs in the API Console. Web server applications can use service accounts in conjunction with user authorization. Web server applications frequently also use service accounts to authorize API requests, particularly when calling Cloud APIs to access project-based data rather than user-specific data. A properly authorized web server application can access an API while the user interacts with the application or after the user has left the application. It is designed for applications that can store confidential information and maintain state. This OAuth 2.0 flow is specifically for user authorization. For example, an application can use OAuth 2.0 to obtain permission from users to store files in their Google Drives. OAuth 2.0 allows users to share specific data with an application while keeping their usernames, passwords, and other information private. This document explains how web server applications use the Google API Client Library for Ruby to implement OAuth 2.0 authorization to access Google APIs. The server can also add its own claims, such as Google’s hd showing the “hosted domain” of the account when using a G Suite account.Using OAuth 2.0 for Web Server Applications Google also returns the user’s profile information such as name (first and last), profile photo URL, gender, locale, profile URL, and email. The response will always include the sub key, which is the unique identifier for the user. ![]() The response will be a JSON object with several properties about the user. Host: Authorization: Bearer ya29.Gl-oBRPLiI9IrSRA70. Make a GET request to that endpoint and pass the access token in the HTTP Authorization header like you normally would when making an OAuth 2.0 API request. In this case, you use the access token rather than the ID token to look up the user info. This is part of the OpenID Connect standard, and the endpoint will be part of the service’s OpenID Connect Discovery Document. Using the Access Token to Retrieve User InfoĪs mentioned before, many OAuth 2.0 services also provide an endpoint to retrieve the user info of the user who logged in. Below is an example of the data in the JWT. The middle piece is a base64-encoded JSON string containing the data about the user. We can split the string on the dots, and take the middle piece. It’s made up of three parts, each separated by a period. With this in mind, and I know it seems unsafe at first, it’s okay to decode the ID token without validating it. In this case, you got the ID token from an HTTPS connection to Google using the client secret to authenticate the request, so you can be confident that the ID token you obtained did in fact come from the service and not an attacker. This is because in other OpenID Connect flows your app will get an ID token over an untrusted channel such as a browser redirect. Normally, it’s critical that you validate an ID token before trusting any of the information inside it.
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