update:重复创建也返回成功

创建时可直接返回二维码

QRCodeService/Controllers/Api/LinkController.cs

@@ -35,7 +35,7 @@ namespace QRCodeService.Controllers.Api
         }
         [Route("i/{shortCode}/")]
         [HttpGet]
-        public async  Task<IActionResult> GetQrCode(string shortCode,int img=0)
+        public async  Task<IActionResult> GetQrCodeImage(string shortCode)
         {
             var link = await linkQueries.GetLinkAsync(shortCode);
             if (link == null)
@@ -51,7 +51,11 @@ namespace QRCodeService.Controllers.Api
                 return File(stream.ToArray(), "image/png");
             }
         }
-
+        /// <summary>
+        /// 创建二维码 如果请求头的Accept类型是image/png 则会返回二维码图片 否则返回二维码地址
+        /// </summary>
+        /// <param name="input"></param>
+        /// <returns></returns>
         [CheckSign]
         [HttpPost]
         public async Task<IActionResult> Create(CreateLinkModel input)
@@ -62,7 +66,19 @@ namespace QRCodeService.Controllers.Api
             {
                 return BadRequest();
             }
-            return Created($"{option.Value.BaseUrl}r/{link.ShortCode}",link.ShortCode);
+            var accept = Request.Headers["Accept"];
+            if(accept == "image/png")
+            {
+                var qrCodeGenerator = new QRCodeGenerator();
+                var data = qrCodeGenerator.CreateQrCode($"{option.Value.BaseUrl}r/{link.ShortCode}", QRCodeGenerator.ECCLevel.Q);
+                var qrCode = new QRCode(data);
+                using (var stream = new MemoryStream())
+                {
+                    qrCode.GetGraphic(10, Color.Black, Color.White, null, 15, 6, false).Save(stream, System.Drawing.Imaging.ImageFormat.Png);
+                    return File(stream.ToArray(), "image/png");
+                }
+            }
+            return Ok($"{option.Value.BaseUrl}r/{link.ShortCode}");
         }
     }
 }