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Mon Aug 27 2018

How do I set up CORS for my Google Cloud Storage Bucket?

If you already familiar with Google Cloud Services and Tools, like gcloud and/or gsutil, you can also  checkout Google's documentation about CORS

Login to your google cloud console: https://console.cloud.google.com/home. Click on "Activate Google Cloud Shell" in the upper right corner (see picture below):


At the bottom of your window, a shell terminal will be shown, where gcloud and gsutil are already available. Execute the command shown below. It creates a json-file which is needed to setup the cors-configuration for your bucket. This configuration will allow every domain to access your bucket using XHR-Requests in the browser: 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, e.g.: echo '[{"origin": ["https://yourdomain.com"],"responseHeader": ["Content-Type"],"method": ["GET", "HEAD"],"maxAgeSeconds": 3600}]' > cors-config.json

Replace YOUR_BUCKET_NAME with your actual bucket name in the following command to update the cors-settings from your bucket gsutil cors set cors-config.json gs://YOUR_BUCKET_NAME

To check if everything worked as expected, you can get the cors-settings of a bucket with the following command: gsutil cors get gs://YOUR_BUCKET_NAME

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