VirtualTask/Controllers/FotoController.cs

using Microsoft.AspNetCore.Mvc;
using static VirtualTask.Controllers.LoginController;

namespace VirtualTask.Controllers
{

    [Route("foto")]
    public class FotoController : Controller
    {
        string _rootPath = string.Empty;

        private readonly IConfiguration _configuration;
        public FotoController(IConfiguration configuration)
        {
            _configuration = configuration;
            var key = _configuration["ApplicationInsights:rootPath"];
            _rootPath = key;
        }


        [HttpGet("{folder}/{fileName}")]
        public IActionResult ShowOrServe(string folder, string fileName)
        {
            if (string.IsNullOrEmpty(folder) || string.IsNullOrEmpty(fileName))
                return Content("Parametri non validi");

            var safeFolder = Path.GetFileName(folder);   // sicurezza
            var safeFileName = Path.GetFileName(fileName);

            // Percorso: /mnt/storagebox/{folder}/PHOTO/{fileName}
            var filePath = Path.Combine(_rootPath, safeFolder, "PHOTO", safeFileName);
            //SOLO PER TEST!!!!!!
            //filePath = "C:\\DATI\\V000000009_2.jpg";


            if (!System.IO.File.Exists(filePath))
                return NotFound("File non trovato");

            ViewBag.Folder = safeFolder;
            ViewBag.FileName = safeFileName;
            return View("ShowImage");
        }

        // Endpoint che restituisce il file binario, usato dentro la view
        [HttpGet("raw/{folder}/{fileName}")]
        public IActionResult RawImage(string folder, string fileName)
        {
            var safeFolder = Path.GetFileName(folder);
            var safeFileName = Path.GetFileName(fileName);

            var filePath = Path.Combine(_rootPath, safeFolder, "PHOTO", safeFileName);

            //SOLO PER TEST!!!!!!
            //filePath = "C:\\DATI\\V000000009_2.jpg";


            if (!System.IO.File.Exists(filePath))
                return NotFound("File non trovato");

            var ext = Path.GetExtension(safeFileName).ToLowerInvariant();
            var contentType = ext switch
            {
                ".png" => "image/png",
                ".jpg" or ".jpeg" => "image/jpeg",
                ".webp" => "image/webp",
                _ => "application/octet-stream"
            };

            var stream = new FileStream(filePath, FileMode.Open, FileAccess.Read);
            return File(stream, contentType);
        }
    }


}