I have MVC Core application with Angular. I need to provide one file xyz.json to client but edit it. This file exists physically. I just need to edit few parts of it with dynamic information.
I was thinking about middleware that would inject information into that one specific file. But I'm not sure if this is correct way to do it.
I've used a controller action to create a dedicated endpoint for this kind of scenario. In the action, you can read the content from the file and modify it, then return as either a FileContentResult or ContentResult. For example:
[HttpGet("xyz-stuff")]
public IActionResult Xyz()
{
var path = Path.Combine(environment.WebRootPath, "xyz.json");
string rawContent = System.IO.File.ReadAllText(path);
// Modify raw content
string modifiedContent = "...";
// Serve modified content
return Content(modifiedContent, "application/json");
}
Depending on how dynamic the changes are, you may want to cache the result in order to avoid the read/modify operations on every request.