It is unclear to me when you should and should not return a HTTP 412: Precondition Failed, error for a web service? I am thinking of using it when validating data. For example, if a client POST's X...

We have already used firebase storage for storing the images and files in our application. Recently our files seem to bee not loading in the application and once cross-checking I found the followin...

So I'm developing a Rest API When a POST is made to create a resource and a required field is missing what should I return? 400 - Bad Request OR 412 - Precondition Failed And Why?

I am implementing a RESTful web service that accesses a database. Entities in the database are versioned to detect multiple updates. For instance, if the current value is {"name":"Bill", "comment":...