embed plugin loader directly into the launcher

PluginLoader/Network/GitHub.cs

@@ -0,0 +1,48 @@
+using System.Net;
+
+namespace PluginLoader.Network;
+
+public static class GitHub
+{
+    public const string listRepoName = "sepluginloader/PluginHub";
+    public const string listRepoCommit = "main";
+    public const string listRepoHash = "plugins.sha1";
+
+    private const string repoZipUrl = "https://github.com/{0}/archive/{1}.zip";
+    private const string rawUrl = "https://raw.githubusercontent.com/{0}/{1}/";
+
+    public static Stream DownloadRepo(string name, string commit, out string fileName)
+    {
+        var uri = new Uri(string.Format(repoZipUrl, name, commit), UriKind.Absolute);
+        LogFile.WriteLine("Downloading " + uri);
+        var request = WebRequest.CreateHttp(uri);
+        request.AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate;
+        request.Timeout = Main.Instance.Config.NetworkTimeout;
+
+        var response = (HttpWebResponse)request.GetResponse();
+        fileName = response.Headers["Content-Disposition"];
+        if (fileName != null)
+        {
+            var index = fileName.IndexOf("filename=");
+            if (index >= 0)
+            {
+                index += "filename=".Length;
+                fileName = fileName.Substring(index).Trim('"');
+            }
+        }
+
+        return response.GetResponseStream();
+    }
+
+    public static Stream DownloadFile(string name, string commit, string path)
+    {
+        var uri = new Uri(string.Format(rawUrl, name, commit) + path.TrimStart('/'), UriKind.Absolute);
+        LogFile.WriteLine("Downloading " + uri);
+        var request = WebRequest.CreateHttp(uri);
+        request.AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate;
+        request.Timeout = Main.Instance.Config.NetworkTimeout;
+
+        var response = (HttpWebResponse)request.GetResponse();
+        return response.GetResponseStream();
+    }
+}