How to set up CORS in your Google Cloud Storage Bucket

cors-cloud-storage.sh

# Go to "Activate Google Cloud Shell" in https://console.cloud.google.com/home.
echo '[{"origin": ["*"],"responseHeader": ["Content-Type"],"method": ["GET", "HEAD"],"maxAgeSeconds": 3600}]' > cors-config.json

# If you want to restrict the access one or more specific domains, add their URL to the array: 
echo '[{"origin": ["https://yourdomain.com"],"responseHeader": ["Content-Type"],"method": ["GET", "HEAD"],"maxAgeSeconds": 3600}]' > cors-config.json

# Set CORS config.
gsutil cors set cors-config.json gs://YOUR_BUCKET_NAME

# Verify if everything is OK.
gsutil cors get gs://YOUR_BUCKET_NAME