Problem
Integrating with external file storage systems like Google Drive requires understanding OAuth 2.0 flows and handling multipart form data requests in Apex, which can be complex for developers new to integrations.
Solution Overview
This snippet provides a clean, well-commented Apex class that handles the entire OAuth 2.0 JWT Bearer Flow for server-to-server integration. It includes methods for getting an access token and uploading a file, simplifying the process significantly.
How to Deploy
- Set up a Google Cloud Platform project and a Service Account.
- Create a Named Credential in Salesforce with the authentication details.
- Use the provided Apex class, calling the
uploadFile
method with your file content and metadata.