Implement proxy-server launch argument

Grab proxy-server from launch arguments to match chromium getting it.

Dotnet/ImageCache.cs

@@ -11,7 +11,8 @@ namespace VRCX
     class ImageCache
     {
         private static readonly string cacheLocation = Path.Combine(Program.AppDataDirectory, "ImageCache");
-        private static readonly HttpClient httpClient = new HttpClient();
+        private static readonly HttpClientHandler httpClientHandler = new HttpClientHandler(){ Proxy = StartupArgs.Proxy };
+        private static readonly HttpClient httpClient = new HttpClient(httpClientHandler);
         private static readonly List<string> _imageHosts =
         [
             "api.vrchat.cloud",
@@ -53,8 +54,7 @@ namespace VRCX
                 {
                     { "Cookie", cookieString },
                     { "User-Agent", Program.Version }
-                },
+                }
-                
             };
             using (var response = await httpClient.SendAsync(request))
             {

Dotnet/StartupArgs.cs

@@ -4,10 +4,12 @@
 // This work is licensed under the terms of the MIT license.
 // For a copy, see <https://opensource.org/licenses/MIT>.
 
+using CefSharp;
 using System;
 using System.Diagnostics;
 using System.IO;
 using System.IO.Pipes;
+using System.Net;
 using System.Text;
 using System.Windows.Forms;
 
@@ -15,6 +17,7 @@ namespace VRCX
 {
     internal class StartupArgs
     {
+        public static IWebProxy? Proxy = WebRequest.DefaultWebProxy;
         public static string LaunchCommand;
         public static Process[] processList;
 
@@ -47,6 +50,12 @@ namespace VRCX
 
                 if (arg.Length >= 7 && arg.Substring(0, 7) == "--debug")
                     Program.LaunchDebug = true;
+
+                if (arg.Length >= 16 && arg.Substring(0, 14) == "--proxy-server")
+                {
+                    string proxyUrl = arg.Substring(15).Replace("'", string.Empty).Replace("\"", string.Empty);
+                    Proxy = new WebProxy(proxyUrl);
+                }
             }
 
             if (!string.IsNullOrEmpty(Program.AppDataDirectory))

Dotnet/WebApi.cs

@@ -144,6 +144,7 @@ namespace VRCX
 
         private static async Task LegacyImageUpload(HttpWebRequest request, IDictionary<string, object> options)
         {
+            request.Proxy = StartupArgs.Proxy;
             request.Method = "POST";
             string boundary = "---------------------------" + DateTime.Now.Ticks.ToString("x");
             request.ContentType = "multipart/form-data; boundary=" + boundary;
@@ -188,6 +189,7 @@ namespace VRCX
 
         private static async Task UploadFilePut(HttpWebRequest request, IDictionary<string, object> options)
         {
+            request.Proxy = StartupArgs.Proxy;
             request.Method = "PUT";
             request.ContentType = options["fileMIME"] as string;
             var fileData = options["fileData"] as string;
@@ -202,6 +204,7 @@ namespace VRCX
         
         private static async Task ImageUpload(HttpWebRequest request, IDictionary<string, object> options)
         {
+            request.Proxy = StartupArgs.Proxy;
             request.Method = "POST";
             string boundary = "---------------------------" + DateTime.Now.Ticks.ToString("x");
             request.ContentType = "multipart/form-data; boundary=" + boundary;
@@ -255,6 +258,7 @@ namespace VRCX
             try
             {
                 var request = WebRequest.CreateHttp((string)options["url"]);
+                request.Proxy = StartupArgs.Proxy;
                 request.CookieContainer = _cookieContainer;
                 request.KeepAlive = true;
                 request.UserAgent = Program.Version;