v1.0.0.0

src/AtlassianDownloader.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net5.0</TargetFramework>
+  </PropertyGroup>
+
+</Project>

src/Program.cs

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+using System;
+using System.IO;
+using System.Linq;
+using System.Net.Http;
+using System.Text.Json;
+
+var output = "output";
+var feedUrl = "https://my.atlassian.com/download/feeds/archived/jira.json";
+    //https://my.atlassian.com/download/feeds/current/jira-software.json
+
+var client = new HttpClient();
+var atlassianJson = await client.GetStringAsync(feedUrl);
+var callString = "downloads(";
+var json = atlassianJson[callString.Length..^1];
+var parsed = JsonSerializer.Deserialize<ResponseArray[]>(json, new JsonSerializerOptions
+{
+    PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
+});
+var versions = parsed.GroupBy(a => a.Version).ToDictionary(a => a.Key, a => a.Select(b => b.ZipUrl).ToArray());
+
+foreach (var version in versions)
+{
+    var directory = Path.Combine(output, version.Key);
+    if (!Directory.Exists(directory))
+    {
+        Directory.CreateDirectory(directory);
+    }
+    foreach (var link in version.Value)
+    {
+        var q = link.PathAndQuery;
+        var outputFile = Path.Combine(directory, q[(q.LastIndexOf("/") + 1)..]);
+        if (!File.Exists(outputFile))
+        {
+            using var file = File.OpenWrite(outputFile);
+            using var request = await client.GetStreamAsync(link).ConfigureAwait(false);
+            await request.CopyToAsync(file).ConfigureAwait(false);
+            Console.WriteLine($"Downloaded {link}");
+        }
+        else
+        {
+            Console.WriteLine($"File for {link} already exists");
+        }
+    }
+}
+Console.WriteLine("Download complete");
+
+
+public partial class ResponseArray
+{
+    public string Description { get; set; }
+    public string Edition { get; set; }
+    public Uri ZipUrl { get; set; }
+    public object TarUrl { get; set; }
+    public string Md5 { get; set; }
+    public string Size { get; set; }
+    public string Released { get; set; }
+    public string Type { get; set; }
+    public string Platform { get; set; }
+    public string Version { get; set; }
+    public Uri ReleaseNotes { get; set; }
+    public Uri UpgradeNotes { get; set; }
+}