title: What are the accepted MIME content types for Google Cloud Storage (GCS)?
body: <p>I have read the online documentation that I could find relating to uploading files to Google's Cloud Storage service (specifically the JSON api): 
  <a href="https://cloud.google.com/storage/docs/json_api/v1/how-tos/upload" rel="nofollow">https://cloud.google.com/storage/docs/json_api/v1/how-tos/upload</a></p>
  
  <p>And on that page it references another page/doc to "See the API reference for each method's list of accepted MIME types and size limits for uploaded files."
  Which links to here:
  <a href="https://cloud.google.com/storage/docs/json_api/v1/" rel="nofollow">https://cloud.google.com/storage/docs/json_api/v1/</a></p>
  
  <p>With nothing I could find on the matter of MIME/content type.</p>
  
  <p>Does anybody know what exactly is allowed to be set as content type on GCS?</p>