Aggiunto metodo controller GET x file download

LiMan.Api/Controllers/FilesaveController.cs

@@ -4,8 +4,8 @@ using LiMan.DB.DBModels;
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.StaticFiles;
 using Microsoft.Extensions.Configuration;
-using Microsoft.Extensions.Logging;
 using NLog;
 using System;
 using System.Collections.Generic;
@@ -43,7 +43,6 @@ namespace LiMan.APi.Controllers
         /// <param name="configuration"></param>
         /// <param name="DataService"></param>
         /// <param name="env"></param>
-        /// <param name="logger"></param>
         public FilesaveController(IConfiguration configuration, ApiDataService DataService, IWebHostEnvironment env)
         {
             dataService = DataService;
@@ -63,15 +62,61 @@ namespace LiMan.APi.Controllers
 
         #endregion Protected Properties
 
-        #region Public Methods
+        #region Protected Methods
 
         /// <summary>
-        /// Richiesta di registrazione ticket supporto
+        /// Calcolo correetto mimetype da nome file
+        /// </summary>
+        /// <param name="fileName"></param>
+        /// <returns></returns>
+        protected string GetMimeType(string fileName)
+        {
+            var provider = new FileExtensionContentTypeProvider();
+            string contentType;
+            if (!provider.TryGetContentType(fileName, out contentType))
+            {
+                contentType = "application/octet-stream";
+            }
+            return contentType;
+        }
+
+        #endregion Protected Methods
+
+        #region Public Methods
+
+        /// GET api/filesave/id/filename
+        /// <summary>
+        /// Recupera un singolo file dato ticket code + nome file (safe)
+        /// </summary>
+        /// <param name="id">Ticket code formato T00000000</param>
+        /// <param name="secureName">Nome file (safe)</param>
+        /// <param name="fileName">Nome file da scaricare</param>
+        /// <returns></returns>
+        [HttpGet("{id}/{secureName}/{fileName}")]
+        public async Task<ActionResult> DownloadFile(string id, string secureName, string fileName)
+        {
+            string relDir = _configuration["FileShare"];
+            string ticketDir = Path.Combine(relDir, id);
+            var filePath = Path.Combine(ticketDir, secureName);
+            // verifico esistenza..
+            if (System.IO.File.Exists(filePath))
+            {
+                var bytes = await System.IO.File.ReadAllBytesAsync(filePath);
+                return File(bytes, GetMimeType(fileName), fileName);
+            }
+            else
+            {
+                return File(new byte[0], "text/plain", "Empty.txt");
+            }
+        }
+
+        /// <summary>
+        /// Elenco files assaociati a ticket supporto
         /// </summary>
         /// <param name="id"></param>
         /// <param name="CurrRequest"></param>
         /// <returns></returns>
-        // POST api/files/list/1
+        // POST api/filesave/list/1
         [HttpPost("list/{id}")]
         public async Task<List<FileAttachModel>> list(int id, [FromBody] SupportRequest CurrRequest)
         {