initial commit

CityInfo.API/Controllers/FilesController.cs

@@ -0,0 +1,54 @@
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.StaticFiles;
+
+namespace CityInfo.API.Controllers
+{
+    [Route("api/files")]
+    [Authorize]
+    [ApiController]
+    public class FilesController : ControllerBase
+    {
+        private readonly FileExtensionContentTypeProvider _fileExtensionContentTypeProvide;
+        public FilesController(
+            FileExtensionContentTypeProvider fileExtensionContentTypeProvider)
+        {
+            _fileExtensionContentTypeProvide = fileExtensionContentTypeProvider 
+                ?? throw new System.ArgumentNullException(
+                    nameof(FileExtensionContentTypeProvider));
+        }
+        [HttpGet("{fileId}")]
+        public ActionResult GetFile(string fileId)
+        {
+            var pathToFile = "email_template.pdf";
+            if (!System.IO.File.Exists(pathToFile))
+            {
+                return NotFound();
+            }
+            if (!_fileExtensionContentTypeProvide
+                .TryGetContentType(pathToFile, out var contentType))
+            {
+                contentType = "application/octet-stream";
+            }
+            var bytes = System.IO.File.ReadAllBytes(pathToFile);
+            return File(bytes, contentType , Path.GetFileName(pathToFile));
+        }
+        [HttpPost]
+        public async Task<ActionResult> CreateFile(IFormFile file)
+        {
+            if(file.Length == 0 || file.Length > 20971520 || file.ContentType != "application/pdf")
+            {
+                return BadRequest("No file or an invalid one has been inputted.");
+            }
+            var path = Path.Combine(
+                Directory.GetCurrentDirectory(),
+                $"uploaded_file_{Guid.NewGuid()}.pdf");
+            using (var stream = new FileStream(path, FileMode.Create))
+            {
+                await file.CopyToAsync(stream);
+            }
+            return Ok("Your file has been uploaded successfully.");
+        }
+    }
+}