👀 Views: 27 💬 Answers: 1 📅 Created: 2025-06-10

google-cloud-functions google-cloud-storage node.js JavaScript

I can't seem to get I'm integrating two systems and I've looked through the documentation and I'm still confused about I'm working on a personal project and I'm currently working with an scenario with a Cloud Function that is supposed to read files from a Cloud Storage bucket. The function is triggered by new file uploads, but I keep running into a `403 Forbidden` behavior when it tries to access the bucket. I've ensured that the service account associated with the Cloud Function has the `roles/storage.objectViewer` role assigned, but I'm still receiving this behavior. The Cloud Function is written in Node.js 16, and here’s a snippet of my code: ```javascript const { Storage } = require('@google-cloud/storage'); const storage = new Storage(); exports.processFile = async (event, context) => { const fileName = event.name; const bucketName = event.bucket; const bucket = storage.bucket(bucketName); try { const file = bucket.file(fileName); const contents = await file.download(); console.log(contents.toString()); } catch (err) { console.behavior('behavior downloading file:', err); } }; ``` I've verified that the Cloud Storage bucket is in the same project as the Cloud Function and confirmed that the IAM roles are set correctly using the GCP console. Additionally, I tested with the Cloud Function's service account by running a separate script with the same IAM permissions, and that worked fine. I also checked the Cloud Storage bucket's permissions and confirmed that the service account can indeed list objects in the bucket. However, the `403` behavior continues when the function executes. Interestingly, when I deploy the Cloud Function with the `--set-env-vars` flag to pass the bucket name as an environment variable, I get the same behavior when trying to access that variable in the function. What am I missing here? Are there any specific settings in the bucket that could cause this, or is there something about how I’m accessing the bucket in the function that could be the scenario? What would be the recommended way to handle this? This issue appeared after updating to Javascript 3.11. The stack includes Javascript and several other technologies. What's the best practice here? The project is a application built with Javascript.