add format file support (#2)

Co-authored-by: Long Ngo <long.ngo@vietgis.com.vn>

QuickChart/QuickChart.cs

@@ -1,24 +1,25 @@
-using System;
-using System.Net.Http;
+using System;
+using System.Net.Http;
 using System.Text;
 using System.Text.Json;
 using System.IO;
 
-namespace QuickChart
-{
+namespace QuickChart
+{
     internal class QuickChartShortUrlResponse
     {
 #pragma warning disable IDE1006 // Naming Styles
         public bool status { get; set; }
         public string url { get; set; }
 #pragma warning restore IDE1006 // Naming Styles
-    }
-
-    public class Chart
-    {
+    }
+
+    public class Chart
+    {
         public int Width { get; set; }
         public int Height { get; set; }
         public double DevicePixelRatio { get; set; }
+        public string Format {get;set;}
         public string BackgroundColor { get; set; }
         public string Key { get; set; }
         public string Config { get; set; }
@@ -34,13 +35,14 @@ namespace QuickChart
             Width = 500;
             Height = 300;
             DevicePixelRatio = 1.0;
+            Format = "png";
             BackgroundColor = "transparent";
 
             Scheme = "https";
             Host = "quickchart.io";
             Port = 443;
-        }
-
+        }
+
         public string GetUrl()
         {
             if (Config == null)
@@ -53,6 +55,7 @@ namespace QuickChart
             builder.Append("&h=").Append(Height.ToString());
 
             builder.Append("&devicePixelRatio=").Append(DevicePixelRatio.ToString());
+            builder.Append("&f=").Append(Format);
             builder.Append("&bkg=").Append(Uri.EscapeDataString(BackgroundColor));
             builder.Append("&c=").Append(Uri.EscapeDataString(Config));
             if (!string.IsNullOrEmpty(Key))
@@ -61,8 +64,8 @@ namespace QuickChart
             }
 
             return $"{Scheme}://{Host}:{Port}/chart?{builder}";
-        }
-
+        }
+
         public string GetShortUrl()
         {
             if (Config == null)
@@ -79,6 +82,7 @@ namespace QuickChart
                 height = Height,
                 backgroundColor = BackgroundColor,
                 devicePixelRatio = DevicePixelRatio,
+                format = Format,
                 chart = Config,
                 key = Key,
             }, options);
@@ -98,8 +102,8 @@ namespace QuickChart
             string responseText = response.Content.ReadAsStringAsync().Result;
             QuickChartShortUrlResponse result = JsonSerializer.Deserialize<QuickChartShortUrlResponse>(responseText);
             return result.url;
-        }
-
+        }
+
         public byte[] ToByteArray()
         {
             if (Config == null)
@@ -116,6 +120,7 @@ namespace QuickChart
                 height = Height,
                 backgroundColor = BackgroundColor,
                 devicePixelRatio = DevicePixelRatio,
+                format = Format,
                 chart = Config,
                 key = Key,
             }, options);
@@ -138,6 +143,6 @@ namespace QuickChart
         public void ToFile(string filePath)
         {
             File.WriteAllBytes(filePath, this.ToByteArray());
-        }
-    }
-}
+        }
+    }
+}