Add a Publish button/toggle/cell

[okennedy]

Starting a thread to discuss how to implement this properly (Tagging @mrb24 @lordpretzel @julianafreire @heikomuller @soniacq @CarlosaBauti for discussion).

Current behaviour: Access to cell results occurs through the API at a common URL for all results (based on cell ID). This means that cell results can be embedded via a URL of the form:

https://[...]/vizier-db/api/v1/projects/432b71f0/branches/d3d598a7/head/modules/ab46ed65

which returns a JSON description of the cell and its results. However, this approach suffers from two limitations:

• It requires interpretation of the JSON results to get a specific output form (e.g., the HTML console output), and thus can not be embedded in an IFRAME.
• It is not compatible with API instances protected by http-authentication

Proposed behavior: Thorough some mechanism to be discussed, users flag a cell result as publishable. They are provided with a URL that can be viewed by anyone, embedded in an external html page, etc... Critically, the set of published cells would be collected under a specific path (e.g., /api/v1/published/...) making it possible to expose them to the public or at least a different set of users with the right proxy configuration.

Some ideas on how this could be implemented:

• Attach a toggle to Python, SQL, Plot, and Scala cells that publishes the cell result.
• Provide a button on console output that publishes the cell result and displays the URL.
• Add an explicit "Publish" cell or incorporate into the UNLOAD cell a feature for publishing the results of an earlier cell.