add --web-snapshot-viewer mode

.gitignore

@@ -338,3 +338,31 @@ ImageMagic/
 EXE/NotForGit/
 viewtube/
 WebFixes/
+
+## MacOS gitignore ##
+
+# General
+.DS_Store
+__MACOSX/
+.AppleDouble
+.LSOverride
+Icon[]
+
+# Thumbnails
+._*
+
+# Files that might appear in the root of a volume
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+.com.apple.timemachine.donotpresent
+
+# Directories potentially created on remote AFP share
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk

HttpTransit.cs

@@ -188,6 +188,13 @@ public void ProcessTransit()
 				string RefererUri = ClientRequest.Headers["Referer"];
 				if (RefererUri == "") RefererUri = null;
 
+				//check for web snapshot viewer mode
+				if (Program.SnapshotViewerMode)
+				{
+					new WebOne.SnapshotViewer.WebSnapshotViewer(ClientRequest, ClientResponse, Log).Handle(RequestURL);
+					return;
+				}
+
 				//check for blacklisted URL
 				if (CheckString(RequestURL.ToString(), ConfigFile.UrlBlackList))
 				{

Program.cs

@@ -33,6 +33,11 @@ public static class Program
 
 		public static string Protocols = "HTTP 1.1";
 		public static bool DaemonMode = false;
+		public static bool SnapshotViewerMode = false;
+		public static bool SnapshotViewerHeaded = false;
+		public static int JpegQuality = 85;
+		public static int StripHeight = 100;
+		public static int MinThreads = 1000;
 		static bool ShutdownInitiated = false;
 		static bool RebuildCA = false;
 
@@ -253,6 +258,13 @@ static void Main(string[] args)
 				return;
 			}
 
+			//allow up to MinThreads concurrent requests without thread pool starvation
+			System.Threading.ThreadPool.SetMinThreads(MinThreads, MinThreads);
+
+			//pre-warm the browser driver so the first snapshot request doesn't wait for it
+			if (SnapshotViewerMode)
+				WebOne.SnapshotViewer.ScreenshotEngine.EnsureContextAsync().GetAwaiter().GetResult();
+
 			//start the server from 1 or 2 attempts
 			for (int StartAttempts = 0; StartAttempts < 2; StartAttempts++)
 			{
@@ -340,6 +352,7 @@ public static void Shutdown(int Code = 0)
 			ShutdownInitiated = true;
 
 			if (Server != null && Server.Working) Server.Stop();
+			if (SnapshotViewerMode) WebOne.SnapshotViewer.ScreenshotEngine.ShutdownAsync().GetAwaiter().GetResult();
 
 			if (!DaemonMode && !Environment.HasShutdownStarted && !ShutdownInitiated) try
 				{
@@ -438,6 +451,47 @@ private static void ProcessCommandLine(string[] args)
 					case "--daemon":
 						DaemonMode = true;
 						break;
+					case "--web-snapshot-viewer":
+						SnapshotViewerMode = true;
+						Console.WriteLine("Web Snapshot Viewer mode enabled.");
+						break;
+					case "--snapshot-headed":
+						SnapshotViewerHeaded = true;
+						Console.WriteLine("Snapshot Viewer: browser will run in headed (visible) mode.");
+						break;
+					case "--quality":
+						if (int.TryParse(kvp.Value, out int q) && q >= 1 && q <= 100)
+						{
+							JpegQuality = q;
+							Console.WriteLine("JPEG quality set to {0}.", JpegQuality);
+						}
+						else
+						{
+							Console.WriteLine("Invalid --quality value: {0}. Expected a number between 1 and 100.", kvp.Value);
+						}
+						break;
+					case "--strip-size":
+						if (int.TryParse(kvp.Value, out int sh) && sh > 0)
+						{
+							StripHeight = sh;
+							Console.WriteLine("Strip height set to {0}px.", StripHeight);
+						}
+						else
+						{
+							Console.WriteLine("Invalid --strip-size value: {0}. Expected a positive number.", kvp.Value);
+						}
+						break;
+					case "--set-min-threads":
+						if (int.TryParse(kvp.Value, out int mt) && mt > 0)
+						{
+							MinThreads = mt;
+							Console.WriteLine("Min threads set to {0}.", MinThreads);
+						}
+						else
+						{
+							Console.WriteLine("Invalid --set-min-threads value: {0}. Expected a positive number.", kvp.Value);
+						}
+						break;
 					case "--help":
 					case "-?":
 					case "/?":

WebOne.csproj

@@ -170,7 +170,10 @@ fi
 
 	<ItemGroup>
 		<Compile Remove="EXE\**" />
+		<Compile Remove="tests\**" />
 		<EmbeddedResource Remove="EXE\**" />
+		<EmbeddedResource Remove="tests\**" />
+		<None Remove="tests\**" />
 		<None Remove="docs/**" />
 		<None Remove="EXE/**" />
 		<None Remove="EXE\**" />
@@ -191,6 +194,8 @@ fi
 	<ItemGroup>
 		<PackageReference Include="System.Diagnostics.PerformanceCounter" Version="4.7.0" />
 		<PackageReference Include="System.Text.Encoding.CodePages" Version="4.7.0" />
+		<PackageReference Include="Microsoft.Playwright" Version="1.*" />
+		<PackageReference Include="SixLabors.ImageSharp" Version="3.*" />
 	</ItemGroup>
 
 	<ItemGroup>

tests/ScreenshotEngineTests.cs

@@ -0,0 +1,88 @@
+using System;
+using System.Threading.Tasks;
+using Microsoft.Playwright;
+using Xunit;
+using Xunit.Abstractions;
+
+namespace SnapshotViewerTests
+{
+    public class ScreenshotEngineTests
+    {
+        private readonly ITestOutputHelper _output;
+
+        public ScreenshotEngineTests(ITestOutputHelper output)
+        {
+            _output = output;
+        }
+
+        [Fact]
+        public async Task Firefox_LaunchesHeadless()
+        {
+            using var playwright = await Playwright.CreateAsync();
+            var browser = await playwright.Firefox.LaunchAsync(new BrowserTypeLaunchOptions
+            {
+                Headless = true
+            });
+
+            Assert.True(browser.IsConnected);
+            _output.WriteLine("Firefox launched OK.");
+            await browser.CloseAsync();
+        }
+
+        [Fact]
+        public async Task Firefox_NavigatesAndReturnsTitle()
+        {
+            using var playwright = await Playwright.CreateAsync();
+            await using var browser = await playwright.Firefox.LaunchAsync(new BrowserTypeLaunchOptions
+            {
+                Headless = true
+            });
+
+            var page = await browser.NewPageAsync();
+            await page.GotoAsync("https://example.com", new PageGotoOptions
+            {
+                WaitUntil = WaitUntilState.Load,
+                Timeout = 30000
+            });
+
+            string title = await page.TitleAsync();
+            _output.WriteLine($"Page title: {title}");
+
+            Assert.False(string.IsNullOrEmpty(title));
+            await page.CloseAsync();
+        }
+
+        [Fact]
+        public async Task Firefox_TakesFullPageScreenshot()
+        {
+            using var playwright = await Playwright.CreateAsync();
+            await using var browser = await playwright.Firefox.LaunchAsync(new BrowserTypeLaunchOptions
+            {
+                Headless = true
+            });
+
+            var page = await browser.NewPageAsync(new BrowserNewPageOptions
+            {
+                ViewportSize = new ViewportSize { Width = 1280, Height = 800 }
+            });
+
+            await page.GotoAsync("https://example.com", new PageGotoOptions
+            {
+                WaitUntil = WaitUntilState.Load,
+                Timeout = 30000
+            });
+
+            byte[] jpg = await page.ScreenshotAsync(new PageScreenshotOptions
+            {
+                FullPage = true,
+                Type = ScreenshotType.Jpeg,
+                Quality = 85
+            });
+
+            _output.WriteLine($"Screenshot size: {jpg.Length} bytes");
+
+            Assert.True(jpg.Length > 1000, "Screenshot should be larger than 1KB");
+            await page.CloseAsync();
+        }
+    }
+}

tests/SnapshotViewerTests.csproj

@@ -0,0 +1,24 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+
+    <IsPackable>false</IsPackable>
+    <IsTestProject>true</IsTestProject>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="coverlet.collector" Version="6.0.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
+    <PackageReference Include="Microsoft.Playwright" Version="1.58.0" />
+    <PackageReference Include="xunit" Version="2.5.3" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.3" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Using Include="Xunit" />
+  </ItemGroup>
+
+</Project>