lux/Lux.API/Controllers/ImageController.cs

using EgwCoreLib.Lux.Data.Services;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using NLog;
using System.Diagnostics;
using System.Text;

namespace Lux.API.Controllers
{
    [Route("api/[controller]")]
    [ApiController]
    public class ImageController : ControllerBase
    {
        public ImageController(ImageCacheService imgServ, ILogger<ImageController> logger)
        {
            _imgService = imgServ;
            _logger = logger;
        }
        /// <summary>
        /// Chiamata GET: riceve Json in formato JwdDto, restituisce svg file
        /// GET: api/Jwd/svg/00000000-0000-0000-0000-000000000000
        /// </summary>
        /// <param name="id">id univoco img</param>
        /// <returns></returns>
        [HttpGet("svg/{id}")]
        public async Task<IActionResult> svgFileGet(string id)
        {
            Stopwatch sw = new Stopwatch();
            sw.Start();
            string filePath = Path.Combine("DemoImg", "AntaDoppia.svg");
            var svgContent = await System.IO.File.ReadAllTextAsync(filePath);
            var bytes = System.Text.Encoding.UTF8.GetBytes(svgContent);
            sw.Stop();
            _logger.LogInformation($"svgString | {sw.Elapsed.TotalMilliseconds:N3} ms");
            return File(bytes, "image/svg+xml");
        }


        /// <summary>
        /// Chiamata GET: restituisce file PNG (da file o da cache)
        /// PUT: api/image/png/00000000-0000-0000-0000-000000000000
        /// </summary>
        /// <param name="id">id oggetto</param>
        /// <returns></returns>
        [HttpGet("png/{id}")]
        public async Task<IActionResult> png(string id)
        {
            Stopwatch sw = new Stopwatch();
            sw.Start();
            string base64Encoded = "";
            byte[] decodedBytes = new byte[0];
            // ...se ricevo percorso --> leggo jwd/svg cablato
            if (!string.IsNullOrEmpty(id))
            {
                // bonifica nome svg da 
                base64Encoded = _imgService.LoadPng(id, EgwMultiEngineManager.Data.Constants.EXECENVIRONMENTS.BEAM);
                // converto base64
                decodedBytes = Convert.FromBase64String(base64Encoded);

            }
            sw.Stop();
            Log.Info($"pngString | {sw.Elapsed.TotalMilliseconds:N3} ms");
            //return Ok(decodedString);
            return File(decodedBytes, "image/png");
        }

        private ImageCacheService _imgService { get; set; }
        private readonly ILogger<ImageController> _logger;
        private static Logger Log = LogManager.GetCurrentClassLogger();
    }
}